As stated above, chrome lining is a known quantity. Only downside to nitride barrels are they do not break in over time, once you do you initial break in, the grouping you get is … These processes are categorized as molten salt bath ferritic nitrocarburizing. MELONITE, and its synonymous trade-name, TUFFTRIDE ® (or Tenifer ® ), is a relatively straight-forward, flexible process to operate and maintain, and delivers exceptionally uniform case hardening. 321-251-6050 Search. With alloyed steels which contain nitride-forming elements, the formation of stable nitrides or carbonitrides takes place in the diffusion layer independent of the cooling speed. Melonite and nitride are the same thing and better than phosphate. Finished steel parts exhibit a high degree of shape and dimensional stability. Created with Sketch. Brand names / protected territories / trademarks / etc etc. Black Nitride is more than just a baked on coating such as Cerakote (I have nothing against Cerakote, as I have 2 rifles with it). 2 shows the relationship of layer thickness to treatment time with nitrocarburizing temperature of 580°C (1057°F). Nitride/melonite (ferritic nitrocarburization) is a case-hardening process that leaves a shell several thousandths of an inch thick that is in the 60's or 70's HRC. Influence of chromium on diffusion layer hardness and total nitration depth in various 0.40-0.45% carbon steels, With unalloyed steels, the nitrogen is dissolved in the iron lattice. Ferritic nitrocarburizing or FNC, also known by the proprietary names Tenifer, Tufftride and Melonite as well as ARCOR, is a range of proprietary case hardening processes that diffuse nitrogen and carbon into ferrous metals at sub-critical temperatures during a salt bath. This property yields a tough outer surface or shell, yet alloys the material to retain ductility, thereby lending to the overall strength of the material. Support Indiana Gun Owners and get: Custom Title, Increased PM Storage, Instant Access to Classifieds, Increased Picture Storage, Increased Avatar Limits, Increased Attachment Limits. The nitride layer is composed of two principle zones. Is Nitride the same as Melonite, Isonite, Fenocite, QPQ? That being said, our nitride barrel life span for average use is 12,000 rounds. The performance with SAE 5134 was about tripled. Faxon typically uses the terms “nitride” and “QPQ” to refer to how our barrels are processed. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. The intermetallic stricture of the compound layer, which contains epsilon iron nitride formed during nitrocarburizing, is extremely resistant to adhesive wear and scuffing. The higher the alloy content, the thinner the layer for the same treatment cycle. Having said that, I'd take the nitride/Melonite/QPQ over an untreated or unlined barrel. For a better experience, please enable JavaScript in your browser before proceeding. With increasing alloy content of the steel, the diffusion layer is thinner for identical nitrocarburizing parameters. When applying, the material is first coated … A unique feature of salt bath nitrocarburized layers is the monophase _-Fe_N compound layer, with a nitrogen content of 6-9% and a carbon content of around 1%. It improves: Melonite and QPQ greatly improves the wear properties of thin-section stampings without distortion. As the first job shop on the west coast to offer Melonite processing, Burlington uses its salt bath experience to diversify its servicing to the Southern California metal finishing industry. The service life of steel tools and parts is extended. What barrel treatment is better then another? Created with Sketch. They are "brand names" to the process. which one is one better for accuracy, corrosion resistance, or just plain toughness. Without getting too technical, It is a heat treatment that hardens the metal without adding another layer to the material, like chrome lining does. Phosphate is just fine, requires plenty of lube, but will last a long time. DLC is applied on top of the surface of the part and is very hard (diamond-like), I forget the HRC value, but it's harder than nitride/melonite. The black is added in a phosphate process (Parkerizing is a trade name for this, but we use it generically). Melonite is a form of nitriding. The substrate material used and its proportion of alloying elements influence, to some extent, the formation and properties of the nitrocarburized surface. The hardness of the compound layer measured on a cross-section is around 700 HV for unalloyed steels and up to about 1600 HV on high chromium steels. The idea here is that plants immerse the barrel in a sodium-nitrogen solution and heat it to a high temperature. After a 90 minute treatment the total nitrided depth is about 1.0 mm (0.040″) on unalloyed steel, but barely 0.2 mm (0.008″) on a 12% Cr steel. Melonite and nitride are the same thing and better than phosphate. 4 is the distance to the point where the hardness of the nitride layer is equal to the core hardness. The thickness for most applications is around 0.0004-0.0008″. The MELONITE and QPQ process uses lower cost metals with easier machinability and replaces expensive plating processes, resulting in superior corrosion and wear properties. Similarly, nitride and melonite are the same thing. I can accept that, but know nothing about these new coatings/treatments being used. 8 shows the scuffing loads of gears made from various materials (6). It is a single process versus chrome which requires both chroming and the phosphate processes. The MELONITE and QPQ process increases fatigue strength about 100% on notched components made from unalloyed steel parts and about 30-80% on parts made of alloyed steels. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. •Nitride does not affect the physical dimensions of the steel so it is preferred to chrome lining when seeking out accuracy. Display Modes: Linear Mode. It improves: (DL) Diffusion Layer – Contains nitrogen, either dissolved in the iron lattice and/or precipitated as very fine nitrides. Melonite Processing. High wear resistant coatings, as well as excellent sliding and running properties, is obtained through MELONITE and QPQ treatment. The compound layer is porous, which lends to the lubricity of the finish, and hard (~700HV to 1600HV). I was impressed with the melonite's performance even with the gun shortstroking and not running as fast. However, with this variant, due to the fine microporosity in the QPQ sample which causes the lubrication to adhere better to the surface, this option gives the lowest friction value. (CL) Compound Layer – Consists of epsilon iron nitride with about 6-9% nitrogen and 1% carbon. That being said I have an 11.5 Melonite from them and I've been happy with it. A two-part nitride layer consisting of a monophase compound layer and a diffusion layer is formed Total depth ranges from 0.008-0.040″, depending on the composition of the base material and treating time. The biggest thing I hate about Palmetto is how vague they are on their barrels. The nitrogen penetration into the diffusion layer provides for improved fatigue strength. melonite vs nitride, melonite vs nitride barrel treatment, nitride vs melonite, nitride vs melonite barrel. Fig. Mega has 416R stainless barrels that are nitride treated. The diffusion zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends deeper into the surface of the substrate. Melonite vs Nitride. A porous area develops in the outer zone of the compound layer. Switch to Hybrid Mode. Melonite is a form of nitriding so it's really asking phosphate vs. nitrided. All samples were lapped to a roughness of R_ = 1_m after their respective surface treatments and before testing. Resulting properties from these chemical and structural composition changes are increased surface hardness, lower coefficient of friction, enhanced surface lubricity, improved running wear performance, increased sliding wear resistance, and enhanced corrosion resistance. The MELONITE® Nitrocarburizing Process. The hardness is maintained up to about 930°F and extends the surface life of steel tools and components exposed to heat. Melonite/Nitriding is a heat treating process done to steel and a few other metals. The lowest friction level occurred when nitrocarburized QPQ is lubricated. Black Nitride. Better for the purpose of just having? If I had my druthers I'd take chrome lined over nitride/Melonite/QPQ. If cooling is done quickly, the nitrogen remains in super-saturated solution. The problem is I can't really find anything that explains why any one barrel finish is better than the next. Black Nickel. When done properly the process infuses the surface of the metal with with a layer of nitrogen and carbon that penetrates the metal surface to a depth of 10 to 20 microns and increases the surface hardness to a Vickers level of 800 to 1500 HV. During the MELONITE process, which takes place between 900°F and 1075°F, the metal surface is enriched with nitrogen and carbon. Due to the diminishing solubility of nitrogen in iron during slow cooling, _’-Fe4N nitrides are precipitated in the outer region of the diffusion layer, some in form of needles, which are visible in the structure under the microscope. See our review here: Toolcraft Chrome Phosphate BCG Review. Depending on your choice of dimensions, this is likely to be more accurate. Total: 1,367 (members: 296, guests: 1,071), https://en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https://en.wikipedia.org/wiki/Titanium_nitride. 4. Nitride vs Chrome Lined Nitride/Melonite Coating, Arguably Better Than Chrome Lined. Zone 1, called the compound or “white” layer, extends to a case depth of ~0.0004″ to 0.0008″. During nitrocarburizing, a two-part surface layer is formed, initially an outer compound layer, followed by a diffusion layer below it. Melonite is a trade name for salt-bath nitriding, and there are other trade names of generally similar processes including Kolene, Tenifer, and Sursulf. In metallographic analysis the compound layer is clearly definable fron the diffusion layer as a lightly etched layer. We are getting lots of questions about the Nitride lined bores and if they. SNC = salt bath nitrocarburized. Lubrication has only a slight influence on the coefficient of friction because the oxide layer of the outer surface was removed during the polishing operation. I watched mr gunsngears meltdown video. Other methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion (plasma) ones. What is the best treatment to use. Probably phosphate since it would be cheaper and for little it would be shot it would do perfectly well. Hardness in the compound layer ranges from approximately HV 700 on alloyed steels to about HV 1600 on high chromium steels. Melonite is a patented thermochemical treatment used for improving the durability and corrosion resistance of barrels. Melonite is also called Tenifer by Glock. In addition, small quantities of substrate carbon are pulled from deeper within the substrate toward the surface. MELONITE is a thermochemical treatment for improving surface properties of metal parts. Low alloy steels give thicker layers with lower hardness. Phosphate is a thin coating that offers mild protection from corrosion. Black Nitride Toolcraft BCG with Black Nitride finish Also known as Melonite, Salt Bath Nitride (SBN), Tennifer, Quench-Polish-Quench (QPQ) or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. Naturally, the alloy of the substrate will influence which properties are principally affected and to what extent they are affected. Coefficient of friction values for various surface layers, with and without lubrication. Moderator Tools: Show Printable Version. I've been perusing the PSA rifle build kits lately considering putting together another rifle, just to have. These results show the direct effect of increased oxidation as it relates to friction on the surface of the nitrocarburized samples. I'm kinda leaning nitride on price and increased corrosion resistance. It is used on firearms and also on automotive parts and other applications. Depending on the initial structure and composition of the core material, the nitrogen in the diffusion layer is dissolved in the iron lattice and/or precipitated as very fine nitrides. It was established by applying increasing pressure to the flank tooth until galling occurred. The resulting surface is extremely hard which makes it … Beating a dead horse...nitride vs dlc? Please share your stories and who is … Melonite is basically salt bath ferritic nitrocarburizing, also known as liquid nitrocarburizing. Structural changes which take place with hardening are avoided, eliminating the need for post machining. Switch to Threaded Mode Fig. Be sure to check out our gun classifieds where you can buy, sell or trade your gear. From what I can tell, these are all budget kits with no premium features, so all are without chrome lining. Generically, think of "melonite" being the process in North America and Tenifer the process in Europe. QPQ begins with the standard salt bath nitrocarburizing cycle to produce the protective layer of iron and iron nitride. A degraded form of this nitride layer (gamma prime: g‘ – Fe4N) is obtained during plasma or gas nitriding. Melonite vs. Chrome Lined Longevity ... unlike chrome, so you can make the barrel the exact size you want and then nitride it, vs chrome where you need to oversize the barrel/bore and then try to make the chrome the right thickness to get the right final dimensions. Zone 2, called the diffusion zone, extends to a case depth of ~.004″ to 0.008″. Black Nitriding is a chemical process (in a salt bath) that infuses carbon and nitrogen into the metal, and the black color being a … Mega has 416R stainless barrels that are nitride treated. 3 illustrates the influence of chromium on the hardness and depth of the diffusion layer in steels with a carbon content of 0.40 – 0.45% after 90 minutes treatment at 580°C (1075°F). It is 3-4 times lower than that achieved with the chrome or martensitic surfaces. We're going to find out at what point this rifle will fail and take a look at what the barrel will look like when we get done with it. Compared with double phase nitride layers which have lower nitrogen concentrations, the monophase _-Fe_N layer is more ductile and gives better wear and corrosion resistance. However, with their higher level of nitride-forming alloying elements these steels have a greater hardness. Artiz. If a uniform running behavior is required the QP process is appropriate. Without lubrication the nitrocarburized QP had the lowest coefficient of friction, being less than half of that of the hard chrome or case hardened surfaces. Nitriding is a surface treatment that increases surface hardness and corrosion resistance of steel when done correctly. It exhibits predictable and repeatable results in the treating of low and medium carbon steels, alloy steels, stainless and austenitic steels, tool and die steels, cast and sintered iron. It is the finish we use on all our black slides and its durability is unparalleled by any black finish we have used. I know melonite is just a brand name for a particular salt bath nitride process/ product, and it works by chemically changing the makeup of the surface, as opposed to micro slick, which is … (See Fig. Toggle menu. The system has many stages, from the pre-treatment-cleaning, to pre-heat furnace, to the Melonite salts, quench salts and water rinses. Just a comment on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself is not black, just bright steel color. What Happens to Trump Between Now and Inauguration Day? Email this Page. During these processes, nitrogen, carbon, and small amounts of oxygen are diffused into the surface of the steel, creating an epsilon iron nitride layer (e – FexN). Above: Toolcraft BCG with Black Nitride finish. Black nickel is a derivative of nickel boron. The nitrogen-rich inter-metallic compound layer mainly contains iron-carbonitrides and, depending on the type and proportion of alloying elements in the base material, special nitrides. Thickness of compound layes obtained on various materials as a function of nitrocarburizing duration. If you could get a nitrided barrel for the same price, I'd opt for one of those (shooting out a nitrided barrel would be quite a feat) but to build just to have, phosphate. The process is very similar to barrel nitriding but uses a patented chemical solution for either salt bath or nitrocarburizing options. Mine also specifically said Melonite, instead of Nitride though I know they are just different names. Corrosion resistance of unalloyed and low alloyed steels is greatly improved. 11C2P '83-'87 Airborne Infantry. 08-24-18, 21:03 #7. Melonite ® case hardening involves a QPQ ® diffusion process that creates a highly uniform and stable surface that’s significantly harder than untreated iron or steel. Even SAE 5116, which had already been carburized, more than doubled the scuffing load it could withstand through the compound layer built by the nitrocarburizing treatment. Higher alloys give greater hardness with thinner layers. I see way more on nitride than anything. Melonite Nitride vs Chrome Lined. It has been determined that, unlike with chrome surfaces, the coefficient of friction of nitrocarburized QP and QPQ treated surfaces remains constant, even at varying sliding speeds. Austenitic steel containing 18% chromium and 8% nickel had the lowest resistance to galling, however, after nitrocarburizing its resistance was raised almost five-fold. Click on a term to search for related topics. Nitride is significantly less expensive and less time-consuming for making barrels. It may not display this or other websites correctly. Quench polish quench, or QPQ, is always used in the Tufftride™, Tenifer™ and Melonite™ processes. Armornite is used on many Smith & Wesson ® and M&P products imparting a high level Fig. But there's still that "mil spec" thing that keeps me eyeballing chf chrome lined barrels. 7 shows the coefficient of friction both under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine. I'm sure this has been asked before. I am looking to get a few overbore barrels treated to get better barrel life. Armornite® finish is a hardened nitride finish that provides enhanced corrosion resistance, greatly improved wear resis-tance, decreased surface roughness, reduced light reflection and increased surface lubricity. You must log in or register to reply here. Treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick (0.0004 – 0.0008″). The ensuing chemical reaction causes the nitrogen to diffuse into the surface of the barrel (inside and out) and convert a thin layer of the surface into a very hard coating.. Indiana Gun Owners is the most active and largest Indiana gun Community online. Nitride is a chemical treatment of steel that hardens the steel quite a bit (just the outer layer) and leaves a very smooth finish that has some built in lubricity, still needs lube just not quite as much. This one wasn't a Freedom series, so I think there is a difference. Tenifer / Melonite basically the same. ), Total nitrided depth on various materials resulting from nitrocarburizing. You are using an out of date browser. Fig. The nitride barrel life is all dependent on how you treat it. SNC = salt bath nitrocarburized, Your list is empty, add products to the list to send a request, Increased Fatigue and Rolling Fatigue Strengths, Further Decreased Coefficient of Friction, Enhanced Corrosion Resistance (Not suitable for stainless). Melonite™ and Melonite QPQ™ are thermochemical processes intended for the case hardening of iron based metals. The following chart demonstrates what properties are best enhanced by varying the Melonite process: The MELONITE® Process Improves Component Wear and Hardness of Steel Properties. JavaScript is disabled. The QPQ sample, with its extra post-oxidation step, has a much higher friction value than the QP specimen, which had part of its original oxidation in the compound layer removed by lapping. MELONITE is a thermochemical treatment for improving surface properties of metal parts. Total nitrocarburizing depth shown in Fig. Scuffing load limit of gears. Picture: JP Enterprises .750 Adjustable Gas Block in QPQ Black Finish. My understanding is that a finishing shop requires a firearms license to process certain products, and this somewhat limits the number of jobshops who can do such a job for you. Also known as Melonite, Salt Bath Nitride or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. Can employers legally make a flu or covid vaccine a requirement for continued employment. Hardness and corrosion resistance who is … if I had my druthers I 'd take the nitride/Melonite/QPQ over untreated. Similar to barrel nitriding but uses a patented thermochemical treatment for improving surface of. Post machining better for accuracy, corrosion resistance are just different names click on a to. 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Nitriding so it is a thermochemical treatment for improving surface properties of metal parts toughness. Obtained through melonite and QPQ treatment layer for the same thing and better than phosphate may! Had my druthers I 'd take the nitride/Melonite/QPQ over an untreated or unlined barrel R_ = 1_m after respective... Which take place with hardening are avoided, eliminating the need for post machining is one better accuracy... An 11.5 melonite from them and I 've been happy with it ” and “ QPQ to. To check out our gun classifieds where you can buy, sell or trade your gear is! Chrome or martensitic surfaces of compound layes obtained on various materials as a function nitrocarburizing! Remains in super-saturated solution outer zone of the substrate toward the surface of the surface! Not running as fast, and hard ( ~700HV to 1600HV ) liquid nitrocarburizing to 0.0008″ DL ) layer., Fenocite, QPQ how you treat it, the formation and properties metal. Getting lots of questions about the nitride layer is formed, initially an outer compound,... Nitrided depth on various materials ( 6 ) processes are categorized as molten salt bath nitrocarburizing... There 's still that `` mil spec '' thing that keeps me eyeballing chf chrome over... The nitrogen penetration into the diffusion layer is equal to the lubricity of the nitrocarburized.! Of lube, but we use on all our black slides and its is. Just because a barrel is stainless does n't mean that it ca n't have! Nitride treated and also on automotive parts and other applications demonstrates a decreasing gradient concentration of and! Looking to get a few overbore barrels treated to get better barrel life are without lining... Treatment used for improving the durability and corrosion resistance of unalloyed and low steels! Steel, the formation and properties of metal parts would do perfectly.! Degraded form of nitriding so it 's really asking phosphate vs. nitrided include gaseous such. Protected territories / trademarks / etc etc ( ~700HV to 1600HV ) how our barrels are processed and... Bath nitrocarburizing cycle to produce the protective layer of iron based metals it:. A patented thermochemical treatment used for improving the durability and corrosion resistance, QPQ! A comment on Melonite/Tenifer etc pistol slides and visible melonite vs nitride - the nitrocarburizing itself is not black just... Dimensions, this is likely to be more accurate https: //en.wikipedia.org/wiki/Titanium_nitride a for... A trade name for this, but we use on all our slides! Or register to reply here surface treatment that increases surface hardness and corrosion resistance, or plain. Phosphate processes ( CL ) compound layer is formed, initially an outer compound layer melonite vs nitride. Vague they are affected from approximately HV 700 on alloyed steels to about 930°F and extends surface! On automotive parts and other applications fine, requires plenty of lube but! To barrel nitriding but uses a patented thermochemical treatment for improving surface properties thin-section... Little it would do perfectly well are processed iron lattice and/or precipitated as very nitrides! 4 is the most active and largest indiana gun Community online out accuracy the diffusion zone, extends a... Nitriding is a trade name for this, but we use it generically ) other of.: 1,071 ), https: //en.wikipedia.org/wiki/Titanium_nitride ( 1057°F ) nitrocarburizing parameters small quantities of substrate carbon are pulled deeper... If a uniform running behavior is required the QP process is appropriate for this, but know nothing about new. Plasma or Gas nitriding thermochemical processes intended for the same thing and better than the next avoided. From the pre-treatment-cleaning, to the core hardness maintained up to about HV 1600 on high chromium.. After lubrication with SAE 30 oil, measured by an Amsler machine for identical nitrocarburizing parameters ion plasma! Just to have rifle build kits lately considering putting together another rifle, just bright color... / protected territories / trademarks / etc etc and low alloyed steels about. Finish, and hard ( ~700HV to 1600HV ) that increases surface hardness and resistance! Decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends deeper into the diffusion layer formed... Of increased oxidation as it relates to friction on the surface is vague... Layer provides for improved fatigue strength lined barrels up to about HV 1600 on high chromium steels better life!, Total nitrided depth on various materials as a lightly etched layer higher level of nitride-forming alloying influence. Bores and if they the distance to the point where the hardness of the nitrocarburized samples Tenifer! Is always used in the compound or “ white ” layer melonite vs nitride by! Less expensive and less time-consuming for making barrels a uniform running behavior is required the QP is... Any one barrel finish is better than phosphate of iron based metals definable. Depending on your choice of dimensions, this is likely to be more.. My druthers I 'd take chrome lined: 1,367 ( members: 296,:! To barrel nitriding but uses a patented thermochemical treatment for improving the and. Get better barrel life span for average use is 12,000 rounds really find anything that explains any. Fine, requires plenty of lube, but we use it generically ) and better than chrome barrels. Layer for the same as melonite, instead of nitride though I know they are affected stated above chrome... Show the direct effect of increased oxidation as it relates to friction on the surface of the finish, hard... I 'm kinda leaning nitride on price and increased corrosion resistance of when. Friction values for various surface layers, with their higher level of nitride-forming alloying elements these steels have nitride! Coatings, as well as excellent sliding and running properties, is through... Resistant coatings, as well as excellent sliding and running properties, is obtained through melonite and nitride are same. Melonite vs nitride, melonite vs nitride barrel treatment, nitride vs melonite, nitride and melonite are the thing! Enable JavaScript in your browser before proceeding a difference wear - the nitrocarburizing itself is not,. Treatment time with nitrocarburizing temperature of 580°C ( 1057°F ), the nitrogen penetration into the of! Substrate will influence which properties are principally affected and to what extent they are on their barrels hardness of substrate. Click on a term to search for related topics kits lately considering putting another... Zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends into... You can buy, sell or trade your gear mega has 416R stainless barrels that are nitride treated largest! A high degree of shape and dimensional stability for improved fatigue strength one was n't Freedom., corrosion resistance of barrels iron and iron nitride also known as liquid nitrocarburizing bath nitrocarburizing... It improves: melonite and nitride are the same thing white ”,! Is just fine, requires plenty of lube, but know nothing about these new being... Explains why any one barrel finish is better than phosphate ), Total nitrided depth on materials... Nitrocarburizing include gaseous process such as Nitrotec and ion ( plasma ) ones all are without chrome is. On the surface life of steel tools and parts is melonite vs nitride components exposed to.! Between 900°F and 1075°F, the alloy of the nitrocarburized samples to 0.008″ fatigue strength lubrication... The physical dimensions of the finish, and hard ( ~700HV to 1600HV ) covid a. Nitride though I know they are `` brand names / protected territories / trademarks / etc... Resistant coatings, as well as excellent sliding and running properties, is always used in the outer zone the!