"Cold" bluing is generally a selenium dioxide based compound that colours steel black, or more often a very dark grey. Remove the bolt & trigger group this might require a pin punch on some guns to pull the trigger group.From what little I can see in the picture here . You should put the brass drift (which you can make out of a piece of brass rod about 1/4 in diameter) on the sight base, and then start tapping the end of the drift with a small hammer. Use hemostats to hold a cleaning patch wetted with the solution and apply in nice, long, even strokes. And then there is the difference between general care and storage vs available daily carried protection pistols living in a some sort of Holster (nylon or leather) , good, bad, take them out or leave them in? List Price: $18.64 $18.64. Black iron wire You will need black iron wire to tie around any object you Shooting Mystery is reader-supported. Make sure the piece is chemically clean, sandblasting followed by power wire brushing is good then stop heating when you hit purple because the heat will travel. If a bank transfer is made but no receipt is uploaded within this period, your order will be cancelled. Haha. gas coverage is another big one. With a simple heating and quenching process, you can make your steel last for much longer! Dont. The "turning blue" process has nothing to do with hardening of the steel, or its compression. Note that it has to be a different tank from the one you used for Step 2. Steps to Hot Blue Steel with a Torch Ferrari installs valve seats in their aluminum cylinder heads via robot. Bluing is also used for providing coloring for steel parts of fine clocks and other fine metalwork. The loose oxide was then carded (scrubbed) off, using a carding brush - a wire brush with soft, thin (usually about 0.002in (0.051mm) thick) wires - or wheel. Alternitavely you can leave it in the oil bath to stabilize. That way, you can still use your oven for the rest of the evening. Thanks, 8 years ago Thank you, DG! How do I harden a steel hammer so that is lasts longer and is more durable? So I buffed down the barrel with steel wool and started over heating the barrel in the oven before taking it outside to add the solution (which is nitric acid). Stainless steel can only tolerate hot bluing and a limited amount of chemicals. you may benefit from the use of a gas lense as well. This works well for me. Repeat 3 times. Craig, torch bluing is a real thing that has been use a lot in the custom gun world, mostly for screw heads but even for complete muzzle loader creations ( the vendor will be quite proud of his work it seems as cost increases considerably to a finished item). I wouldnt use this bluing method for these items. Use your torch to bring up Instead of applying the acid solution directly to the metal parts, the parts are placed in a sealed cabinet with a moisture source, a container of nitric acid and a container of hydrochloric acid. Various processes are used for the oxidizing process. Hardened steel prevents knife blades from dulling and tools from bending and breaking. Bluing only works on steel, cast iron, or stainless steel parts for protecting against corrosion because it changes iron into Fe3O4; it does not work on non-ferrous material. Alternatively, you can press the pad of steel wool between your hands over the container of acetone, and then put it on some paper towels to dry. WebBluing is a passivation process in which steel is partially protected against rust using a black oxide coating. Mea maxima culpa - and I left my comment up rather than delete the thread (for now) just so I could reply and admit the My Dumb, rather than skulk away cleanly >;-), Question I like using acetone to strip the heavy oil on guns, because it lightens up the oils and makes them easier to strip with a water-based cleaner. You might need two applications to clean up more deeply rusted spots. This will remove all the traces of the bluing solution and other chemicals. The blueing salt bath will be at about 286 to 292F, and as it is bubbling away, it is losing water, and the boiling point of the solution keeps climbing. The actual temperature of the steel depends on the carbon content inside. 2023 All Rights Reserved by Shooting Mystery. Contemporary heat-treatable steels did not exist or were in their infancy. This finish allows them to be stored in high-moisture conditions, like sports bags, without rusting. There are many methods you can use to blue the steel. "publisher": { ], I had to sand and restain the stock, and sanded the barrel from 120 down to 400 grit the pitting was so bad. [4], Bluing can also be done in a furnace, for example for a sword or other item traditionally made by a blacksmith or specialist such as a weapon-smith. Commercial products are widely sold in small bottles for cold bluing firearms, and these products are primarily used by individual gun owners for implementing small touch-ups to a gun's finish, to prevent a small scratch from becoming a major source of rust on a gun over time. "@type": "Article", So you said the polishing is key for the coloring process. You MUST plug your barrels, gas cylinders, remove your pistons, etc. Did you make this project? You work on nice guns! You can blue heat-treated parts with no ill effects. Question It had been thoroughly degreased before my first attempt, but in trying to repair a poor result, I apparently contaminated it a bit. Heres instructions from Mark Lee Supplies on using their Express Blue #1. "https://www.reddit.com/user/theshootingmystery" DG should receive a stipend for his valuable contributions to TTAG. Brand: Logix. But since this was my first project, with an inexpensive kit as a learning tool, and as I intend to do this again with a much more expensive kit, my trials and errors and your voice of experience will be very useful the next time around. I dont use hot salt blueing because much of my work is on older double guns, which have ribs that are soft-soldered into place. on Introduction, looks nice but you are using what is known as heat treatment which will darken steel, not using bluing salts as in gun bluing of rifle barrels all in all very nice instructable, Reply When you buy through links on our site, we may earn an affiliate commission. The part that is to race the other is heated normally up to about 220 especially if it is an aluminum casting like a cylinder head. In place of using a hot bath (although at a lower temperature) chemically induced method, it is possible through controlling the temperature to heat steel precisely such as to cause the formation of black oxide selectively over the red oxide. Dont just leave them on a surface that could corrode or burn), get a new patch into the hemostats, soak, wring out, and keep going. "url": "https://shootingmystery.com/wp-content/uploads/2017/01/Shootinglogo.png" 2. How do I do this? The color is oxide, but I believe you can scrape it off. Being prepared is important if you can not measure the temp. Use ice cubes. There can be different layers you have to apply. Fill the tank with a suitable amount of water then add in the bluing salt using the correct ratio. Brilliant blues. Wait for 10 15 minutes and then take out the components. "sameAs": When the first patch gets really funky, then drop that in your plastic garbage container (remember, these patches have been soaked in acid solutions! "url": "https://shootingmystery.com/wp-content/uploads/2021/01/How-to-Blue-Stainless-Steel-in-5-Easy-Steps.jpg" ", https://mgs.edu/making-chisels-skips-newsletter/, http://www.technologystudent.com/equip1/heat1.htm. (meaning oxygen atoms are able to attach themselves to the outer layer of the steel)We did this with an electromagnet! Gun companies dont/wont do it because they want to make quick money, and today its all phosphates and bake-on appliance paint (you didnt think a guy who calls Glocks cheez-whiz was going to sing the praises of Duracote or Cerakote, did you?). Heat the Steel. Bluing is often a hobbyist endeavor, and there are many methods of bluing, and continuing debates about the relative efficacy of each method. of the steel than do not even try this on something that is anything other than artistic in nature! Please be careful with the cold bluing solutions. Thank you all who had a part in the production of this important information! All those materials the leather and bone the coal where sources of carbon and other trace elements. What did you use for polishing your pieces and Im guessing you polished then added the chemicals after?Thanks, Joe, Question It would be a good idea to get some gloves on. "image": { I dont have that much blueing to do in my shop, so I dont use hot salts. Ill be saving this for the future. Higher carbon contents will take longer to heat. Heat the area you'd like to drill just until it starts to glow red, then allow it to cool slowly. "https://twitter.com/Shoot1ngMystery", Hot NaOH is so alkaline it is great as dissolving organic materials. It takes practice. For more information on using a blowtorch and protecting the steel, scroll down! { Take them out after a couple of minutes and then wipe them clean to remove excess oil. Last Updated: May 13, 2022 It is slightly caustic, so be careful you dont leave it on the gun for long. How to colour steel with heat (hot oil finish) is a simple but effective way of achieving a desired colour of choice.The colours are fantastic and often come out in a beautiful two-tone shine. Heat the area with a torch until it stops sweating. this produces better, less turbulant gas flow, which will reduce heat traces. You need to constantly be adding in a bit of water to bring the boiling point back down into the range you need. Polish to at least 400 grit. It can soften up some paints and plastics. There are also methods of cold bluing, which do not require heat. We have all kinds of rifles and shotguns with recievers made from non-Fe alloys again we do not give it a second though or break out the hardness tester. occasionally I'll buff it afterwards. For hazzalandy: carbon content has nothing to do with the color process, it is only the temperature you heat to, and to a lesser extent, the time spent hot. Try it on some unimportant pieces first. If the sights need to be stripped & blued, follow the same procedure, but dont polish on them. In fact most guides no matter their material cast iron to bronze and often bearing races are installed the same way. FigureLLC. It is generally employed on smaller parts such as pins, screws, sights, etc. Ive learned a LOT. In comparison, rust, the red oxide of iron (Fe2O3), undergoes an extremely large volume change upon hydration; as a result, the oxide easily flakes off, causing the typical reddish rusting away of iron. Hi SteelJunkee Method is as follows: Fit rod into drill and set at constant speed Clean rods with acetone on clean rag Use butane and propane mix blow torch to achieve colour range Quench in water Dry The weird thing is that they look great for around 4-5 days then deteriorate. "I have very limited knowledge as to how metal can be manipulated for different applications. Drop a piece of hot charcoal in it and it will burn in the absence of any atmosphere as the nitrate provides the oxygen for the reaction. You might be able to start at 320 grit. And I work alone in my shop, and lack the required (IMO) safety facilities that are needed. 4 years ago It is always essential to remove all oils from metals you want to blue, even if the cold blueing solution claims you dont need to do so. You are a fantastic resource for all of us here. They should start gassing up approximately 2 to 3 minutes after exposure. This is an alternative method for creating the black oxide coating. (NaOH from Ebay soap supplies). *700F is very close to the heat treatment temperature of some steels. The reason why blued guns rust is that something was allowed to attack the surface blueing and get through it to new steel or the blueing job wasnt deep enough to complete passivate the surface from red rust. However, oil may spill and create a fire hazard if the steel is put into the oil too quickly. on Step 1. Hes claiming that method is more durable than Blue alone. It is usually inadvisable to use cold bluing as a touch-up where friction is present. For larger pieces of steel, you need to use a. 5 years ago, I found that heating will turn steel silver ~> gold ~> violet ~> blue. You heat the outside member only when you do a shrink fit.). It is one smoooooth profile, from one end to the other. Im asking because theres a guy on YouTube recommending Brown Express first, then several layers of Blue over that. Thats how vigorously we de-grease guns before starting blueing. Picture Information. The easier of the two methods, hot bluing only requires some degreasing agent, a heating apparatus (a blow torch is perfect for this), and any kind of oil. You can reassemble the gun after. }. $36.73. His enthusiasm for handling firearms and hunting gear inspired him to create the Shooting Mystery blog. After that, slowly and steadily stir the solution in the tank to dissolve the salt. Do all the prep you would for express or rust blueing, especially degreasing. Heating white, degreased steel to 550 to 600F results in brilliant colors. You can make a Caustic Soda KNO3 water bath: 65% Lye (aka sodium hydroxide) In order to confirm the bank transfer, you will need to upload a receipt or take a screenshot of your transfer within 1 day from your payment date. It is named after the blue-black appearance of the resulting protective finish. The reason I ask is that when you heat steel that is in the white to 600F, you get a brilliant blue all on its own. I'm trying to be positive and constructive, and think this is: for an amateur to stick a very hot torch-heated metal object into a plastic container filled with oil is simply dumb (ok, more polite: "irresponsible") at best, highly dangerous at worst. These minerals (often calcium and magnesium compounds) tend to result in blotchy and uneven results. 500F-600F is often all that is needed and the parts can be done over and over again you just have to clean between each attempt. As a small thank you, wed like to offer you a $30 gift card (valid at GoNift.com). Its nice when something can be re-used a time or two, especially when used in diversified ways. it takes a long time to heat up a long (ie barreled action length) tank that is, oh, three barrels wide. The colours range through straw, gold, brown, purple, blue, teal, then black. Often it does provide an adequate cosmetic touch-up of a gun's finish when applied and additionally oiled on a regular basis. Browning a gun gives you a nice, even brown patina finish of red rust on a gun. Once the steel is clean, you can begin heating it up. The torch comes in when you first apply the Express Blue. The use of stainless steel alloy varies a lot from one manufacturer to the other and thats why the bluing effect wont always be consistent. The use of stainless steel alloy varies a lot from one manufacturer to the other and thats why the bluing effect wont always be consistent. They have their place, but doing a whole gun with them isnt that place. If you want it smoother/shinier, you can polish up to 600 grit, with wet-or-dry paper. Learn more Steel is a common durable alloy, and while most steel used in tools is already tough, you can harden it even more to prevent wear and tear. "Bluing" is the process of oxidizing steel to create a durable, corrosion-resistant layer. For the color change to be uniform you have to remove the grease, oil, paint etc or it looks blotchy. New guns are typically available in blued finish options offered as the least-expensive finish, and this finish is also the least effective at providing rust resistance, relative to other finishes such as Parkerizing or hard chrome plating or nitriding processes like Tenifer. Quenched steel is harder, but it becomes more brittle. Make sure to check every nook and cranny of the components so that you can find any discoloration or blemishes. It repeats the process adn by the time the head moves on to the next station all the parts are seated presumably for the life of the head.

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