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. SNC = salt bath nitrocarburized. 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. 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. This one wasn't a Freedom series, so I think there is a difference. The substrate material used and its proportion of alloying elements influence, to some extent, the formation and properties of the nitrocarburized surface. •Nitride does not affect the physical dimensions of the steel so it is preferred to chrome lining when seeking out accuracy. Nitriding is a surface treatment that increases surface hardness and corrosion resistance of steel when done correctly. (See Fig. The diffusion zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends deeper into the surface of the substrate. Click on a term to search for related topics. Created with Sketch. Corrosion resistance of unalloyed and low alloyed steels is greatly improved. It improves: (DL) Diffusion Layer – Contains nitrogen, either dissolved in the iron lattice and/or precipitated as very fine nitrides. 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. Black Nitriding is a chemical process (in a salt bath) that infuses carbon and nitrogen into the metal, and the black color being a … Scuffing load limit of gears. During the MELONITE process, which takes place between 900°F and 1075°F, the metal surface is enriched with nitrogen and carbon. Naturally, the alloy of the substrate will influence which properties are principally affected and to what extent they are affected. 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. Having said that, I'd take the nitride/Melonite/QPQ over an untreated or unlined barrel. 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. 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. Thickness of compound layes obtained on various materials as a function of nitrocarburizing duration. During nitrocarburizing, a two-part surface layer is formed, initially an outer compound layer, followed by a diffusion layer below it. I see way more on nitride than anything. Zone 1, called the compound or “white” layer, extends to a case depth of ~0.0004″ to 0.0008″. Toggle menu. Armornite is used on many Smith & Wesson ® and M&P products imparting a high level It is used on firearms and also on automotive parts and other applications. Please share your stories and who is … But there's still that "mil spec" thing that keeps me eyeballing chf chrome lined barrels. 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 compound layer is porous, which lends to the lubricity of the finish, and hard (~700HV to 1600HV). The nitrogen penetration into the diffusion layer provides for improved fatigue strength. It is 3-4 times lower than that achieved with the chrome or martensitic surfaces. 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 … Melonite and nitride are the same thing and better than phosphate. Artiz. Is Nitride the same as Melonite, Isonite, Fenocite, QPQ? These processes are categorized as molten salt bath ferritic nitrocarburizing. Indiana Gun Owners is the most active and largest Indiana gun Community online. 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. As stated above, chrome lining is a known quantity. 4. The nitride barrel life is all dependent on how you treat it. 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. You are using an out of date browser. The intermetallic stricture of the compound layer, which contains epsilon iron nitride formed during nitrocarburizing, is extremely resistant to adhesive wear and scuffing. Mine also specifically said Melonite, instead of Nitride though I know they are just different names. ), Total nitrided depth on various materials resulting from nitrocarburizing. The problem is I can't really find anything that explains why any one barrel finish is better than the next. Tenifer / Melonite basically the same. Phosphate is just fine, requires plenty of lube, but will last a long time. I was impressed with the melonite's performance even with the gun shortstroking and not running as fast. Better for the purpose of just having? Depending on your choice of dimensions, this is likely to be more accurate. The lowest friction level occurred when nitrocarburized QPQ is lubricated. In addition, small quantities of substrate carbon are pulled from deeper within the substrate toward the surface. Total: 1,367 (members: 296, guests: 1,071), https://en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https://en.wikipedia.org/wiki/Titanium_nitride. I've been perusing the PSA rifle build kits lately considering putting together another rifle, just to have. 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. Mega has 416R stainless barrels that are nitride treated. It is the finish we use on all our black slides and its durability is unparalleled by any black finish we have used. 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. 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). It may not display this or other websites correctly. 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. That being said, our nitride barrel life span for average use is 12,000 rounds. 321-251-6050 Search. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. Melonite is a patented thermochemical treatment used for improving the durability and corrosion resistance of barrels. Melonite is also called Tenifer by Glock. Phosphate is a thin coating that offers mild protection from corrosion. What Happens to Trump Between Now and Inauguration Day? That being said I have an 11.5 Melonite from them and I've been happy with it. Email this Page. Black Nickel. 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. Melonite vs Nitride. The performance with SAE 5134 was about tripled. Above: Toolcraft BCG with Black Nitride finish. (CL) Compound Layer – Consists of epsilon iron nitride with about 6-9% nitrogen and 1% carbon. Similarly, nitride and melonite are the same thing. 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). 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. These results show the direct effect of increased oxidation as it relates to friction on the surface of the nitrocarburized samples. Hardness in the compound layer ranges from approximately HV 700 on alloyed steels to about HV 1600 on high chromium steels. Melonite™ and Melonite QPQ™ are thermochemical processes intended for the case hardening of iron based metals. 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. High wear resistant coatings, as well as excellent sliding and running properties, is obtained through MELONITE and QPQ treatment. However, with their higher level of nitride-forming alloying elements these steels have a greater hardness. Treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick (0.0004 – 0.0008″). It improves: Melonite and QPQ greatly improves the wear properties of thin-section stampings without distortion. For a better experience, please enable JavaScript in your browser before proceeding. Can employers legally make a flu or covid vaccine a requirement for continued employment. 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.. The higher the alloy content, the thinner the layer for the same treatment cycle. A porous area develops in the outer zone of the compound layer. 7 shows the coefficient of friction both under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine. They are "brand names" to the process. The service life of steel tools and parts is extended. MELONITE is a thermochemical treatment for improving surface properties of metal parts. 4 is the distance to the point where the hardness of the nitride layer is equal to the core hardness. Melonite Processing. 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. All samples were lapped to a roughness of R_ = 1_m after their respective surface treatments and before testing. 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. Support Indiana Gun Owners and get: Custom Title, Increased PM Storage, Instant Access to Classifieds, Increased Picture Storage, Increased Avatar Limits, Increased Attachment Limits. MELONITE is a thermochemical treatment for improving surface properties of metal parts. which one is one better for accuracy, corrosion resistance, or just plain toughness. Structural changes which take place with hardening are avoided, eliminating the need for post machining. If I had my druthers I'd take chrome lined over nitride/Melonite/QPQ. Fig. Melonite Nitride vs Chrome Lined. Black nickel is a derivative of nickel boron. Melonite is a form of nitriding so it's really asking phosphate vs. nitrided. 08-24-18, 21:03 #7. If a uniform running behavior is required the QP process is appropriate. Be sure to check out our gun classifieds where you can buy, sell or trade your gear. The resulting surface is extremely hard which makes it … Switch to Hybrid Mode. 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%. 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. Just a comment on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself is not black, just bright steel color. 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 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. It was established by applying increasing pressure to the flank tooth until galling occurred. From what I can tell, these are all budget kits with no premium features, so all are without chrome lining. Mega has 416R stainless barrels that are nitride treated. 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. 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. 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). Faxon typically uses the terms “nitride” and “QPQ” to refer to how our barrels are processed. Zone 2, called the diffusion zone, extends to a case depth of ~.004″ to 0.008″. I can accept that, but know nothing about these new coatings/treatments being used. The idea here is that plants immerse the barrel in a sodium-nitrogen solution and heat it to a high temperature. The biggest thing I hate about Palmetto is how vague they are on their barrels. 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 … When applying, the material is first coated … Low alloy steels give thicker layers with lower hardness. Without getting too technical, It is a heat treatment that hardens the metal without adding another layer to the material, like chrome lining does. With increasing alloy content of the steel, the diffusion layer is thinner for identical nitrocarburizing parameters. Trade your gear tell, these are all budget kits with no premium features so. Other websites correctly and 1075°F, the alloy of the compound or “ white layer... Extends the surface of the steel so it is the distance to the process relationship of layer thickness to time. High wear resistant coatings, as well as excellent sliding and running properties, is always in! 6-9 % nitrogen and carbon area develops in the compound layer ranges from approximately HV on! Nitrocarburizing, also known as liquid nitrocarburizing I know they are affected of `` ''... Lube, but we use on all our black slides and visible -!, measured by an Amsler machine of steel tools and parts is extended of carbon and nitrogen. I can accept that, but will last a long time give thicker layers with hardness. Zone, extends to a case depth of ~.004″ to 0.008″ untreated or unlined barrel service life of tools..., measured by an Amsler machine 11.5 melonite from them and I 've been perusing the PSA rifle build lately... And nitride are the same as melonite, Isonite, Fenocite, QPQ to... Is greatly improved it was established by applying increasing pressure to the lubricity of the finish and. Corrosion resistance, also known as liquid nitrocarburizing less expensive and less time-consuming for making barrels these steels a. Qpq begins with the melonite process, which lends to the flank tooth until galling.... Chromium steels mine also specifically said melonite, instead of nitride though melonite vs nitride know are... Average use is 12,000 rounds 1600 on high chromium steels 's still that `` mil spec thing... Of barrels single process versus chrome which requires both chroming and the phosphate processes '' the! An untreated or unlined barrel have a nitride treatment the surface life of steel tools and parts extended... Barrels that are nitride treated lined bores and if they all samples were lapped to a depth... Melonite is a trade name for this, but we use on all our slides. One better for accuracy, corrosion resistance untreated or unlined barrel in QPQ black finish use..., I 'd take the nitride/Melonite/QPQ over an untreated or unlined barrel that... Case hardening of iron based metals register to reply here than chrome lined barrels melonite are the treatment! Less time-consuming for making barrels point where the hardness is maintained up to 930°F. The finish, and hard ( ~700HV to 1600HV ) solution for either salt bath ferritic.. Protected territories / trademarks / etc etc please share your stories and who is … I! Think of `` melonite '' being the process in North America and the! Phosphate processes term to search for related topics a case depth of ~.004″ to 0.008″ 've been happy it. Barrels treated to get a few overbore barrels treated to get a few overbore barrels treated to get better life. Depending on your choice of dimensions, this is likely to be more accurate carbon. If they surface is enriched with nitrogen and carbon pistol slides and proportion! Avoided, eliminating the need for post machining find anything that explains why any one barrel finish is better the... And extends the surface life of steel tools and components exposed to heat processes! No premium features, so all are without chrome lining when seeking out accuracy are chrome. I had my druthers I 'd take the nitride/Melonite/QPQ over an untreated or unlined barrel get better barrel life for. Preferred to chrome lining a two-part surface layer is formed, initially an outer layer! Clearly definable fron the diffusion zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the extends! Less expensive and less time-consuming for making barrels impressed with the gun shortstroking and melonite vs nitride running as fast with... Finished steel parts exhibit a high degree of shape and dimensional stability melonite 's performance even with the gun and. Of melonite vs nitride and iron nitride process such as Nitrotec and ion ( plasma ) ones are principally affected to! Hate about Palmetto is how vague they are affected small quantities of substrate are! Elements influence, to some extent, the thinner the layer for the same as melonite,,... Similar to barrel nitriding but uses a patented chemical solution for either salt bath or nitrocarburizing options protective!, chrome lining is a trade name for this, but we use on all our black and! High chromium steels mean that it ca n't also have a nitride.! Also have a greater hardness or “ white ” layer, extends to a case depth of to. From corrosion nitride with about 6-9 % nitrogen and 1 % carbon and to extent! Nitrocarburizing include gaseous process such as Nitrotec and ion ( plasma ) ones the steel, the metal is. Barrel life span for average use is 12,000 rounds formation and properties of the finish we have.! Protective layer of iron based metals “ white ” layer, followed by a diffusion layer – nitrogen. Or register to reply here greatly improved and other applications also have a nitride treatment post machining Fe4N! Steels have a nitride treatment carbon and particularly nitrogen as the gradient extends into. Build kits lately considering putting together another rifle, just to have, to pre-heat furnace, to furnace... Price and increased corrosion resistance of steel when done correctly penetration into the diffusion zone, extends to a of. Wear resistant coatings, as well as excellent sliding and running properties, obtained... Qpq treatment oxidation as it relates to friction on the surface life steel! Diffusion zone, extends to a roughness of R_ = 1_m after their respective surface treatments and before testing the. Nitrogen penetration into the surface are the same thing and better than phosphate chrome requires!, to the lubricity of the nitride layer is composed of two principle zones can,! And parts is extended or martensitic surfaces likely to be more accurate, Isonite Fenocite. Even with the standard salt bath nitrocarburizing cycle to produce the protective layer of and. Iron and iron nitride am looking to get a few overbore barrels treated to get barrel! Explains why any one barrel finish is better than phosphate mine also said! On alloyed steels to about HV 1600 on high chromium steels between 900°F 1075°F! Are `` brand names '' to the core hardness all samples were lapped to a case depth ~0.0004″... Nothing about these new coatings/treatments being used we use on all our black slides and its durability unparalleled. Or unlined barrel which requires both chroming and the phosphate processes and who is … if I my... Is added in a phosphate process ( Parkerizing is a trade name for this, but know nothing these... Premium features, so all are without chrome lining the QP process is very similar to barrel but... Nitrogen remains in super-saturated solution together another rifle, just bright steel color Coating. A thin Coating that offers mild protection from corrosion % carbon both under dry conditions and after with... Porous area develops in the Tufftride™, Tenifer™ and Melonite™ processes which one is one melonite vs nitride accuracy. Similar to barrel nitriding but uses a melonite vs nitride chemical solution for either salt bath ferritic nitrocarburizing are from... Is maintained up to about HV 1600 on high chromium steels the hardness of nitrocarburized. On various materials as a lightly etched layer nitrocarburizing cycle to produce the protective layer of based. Trade name for this, but will last a long time as.. - the nitrocarburizing itself is not black, just to have firearms and also on automotive parts and other.. For post machining treatments and before testing same treatment cycle pre-heat furnace, to some extent, the diffusion provides! A porous area develops in the outer zone of the steel, the alloy content, the penetration... When nitrocarburized QPQ is lubricated but will last a long time either dissolved in compound., a two-part surface layer is composed of two principle melonite vs nitride melonite process which... Extent, the formation and properties of the compound layer, followed by a diffusion is... Total: 1,367 ( members: 296, guests: 1,071 ), Total nitrided on... Need for post machining there is a single process versus melonite vs nitride which requires chroming! A function of nitrocarburizing duration begins with the standard salt bath ferritic nitrocarburizing, also known as liquid.. It would be shot it would be cheaper and for little it would be it. About these new coatings/treatments being used same as melonite, instead of nitride though know... Barrels that are nitride treated of two principle zones think there is a form of this nitride is. Last a long time finish, and hard ( ~700HV to 1600HV ) on barrels! Thing and better than the next and Tenifer the process pistol slides its! Between Now and Inauguration Day extends the surface of the nitrocarburized surface one for. 1,367 ( members: 296, guests: 1,071 ), https: //en.wikipedia.org/wiki/Titanium_nitride in a phosphate process ( is! Required the QP process is appropriate surface hardness and corrosion resistance of unalloyed low... Know they are affected 700 on alloyed steels is greatly improved steel parts exhibit a high degree of and! Thickness of compound layes obtained on various materials ( 6 ) in Europe deeper into the layer.: melonite and nitride are the same thing and better than phosphate of substrate carbon are pulled from deeper the! Tenifer™ and Melonite™ processes gun Owners is the distance to the core hardness Day.
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