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Steel MakingHardeningThe forgings can be hardened by cooling in still air or quen... Chromium Chromium when alloyed with steel, has the characteristic func... Carburizing By Gas The process of carburizing by gas, briefly mentioned on page ... Optical System And Electrical Circuit Of The Leeds & Northrup Optical Pyrometer For extremely high temperature, the optical pyrometer is lar... Conclusions Martien was probably never a serious contender for the honor ... Short Method Of Treatment In the new method, the packed pots are run into the case-har... Heat Treatment Of Milling Cutters Drills Reamers Etc THE FIRE.--Gas and electric furnaces designed for high heats ... Making Steel Balls Steel balls are made from rods or coils according to size, st... Quenching The Work In some operations case-hardened work is quenched from the bo... Manganese MANGANESE is a metal much like iron. Its chemical symbol is M... Temperature Recording And Regulation Each furnace is equipped with pyrometers, but the reading an... Knowing What Takes Place How are we to know if we have given a piece of steel the ver... Composition And Properties Of Steel It is a remarkable fact that one can look through a dozen tex... Judging The Heat Of Steel While the use of a pyrometer is of course the only way to hav... Heat Treatment Of Gear Blanks This section is based on a paper read before the American Gea... Annealing Of Rifle Components At Springfield Armory In general, all forgings of the components of the arms manufa... Nickel-chromium A combination of the characteristics of nickel and the charac... Hardening Steel is hardened by quenching from above the upper critical.... Preparing Parts For Local Case-hardening At the works of the Dayton Engineering Laboratories Company, ... Shrinking And Enlarging Work Steel can be shrunk or enlarged by proper heating and cooling... |
Heat Treatment Of Lathe Planer And Similar ToolsCategory: HIGH-SPEED STEEL FIRE.--For these tools a good fire is one made of hard foundry coke, broken in small pieces, in an ordinary blacksmith forge with a few bricks laid over the top to form a hollow fire. The bricks should be thoroughly heated before tools are heated. Hard coal may be used very successfully in place of hard coke and will give a higher heat. It is very easy to give Blue Chip the proper heat if care is used in making up the fire. FORGING.--Heat slowly and uniformly to a good forging heat. Do not hammer the steel after it cools below a bright red. Avoid as much as possible heating the body of the tool, so as to retain the natural toughness in the neck of the tool. HARDENING.--Heat the point of the tool to an extreme white heat (about 2,200 deg.F.) until the flux runs. This heat should be the highest possible short of melting the point. Care should be taken to confine the heat as near to the point as possible so as to leave the annealing and consequent toughness in the neck of the tool and where the tool is held in the tool post. COOL in an air blast, the open air or in oil, depending upon the tools or the work they are to do. For roughing tools temper need not be drawn except for work where the edge tends to crumble on account of being too hard. For finishing tools draw the temper to suit the purpose for which they are to be used. GRIND thoroughly on dry wheel (or wet wheel if care is used to prevent checking). Next: Heat Treatment Of Milling Cutters Drills Reamers Etc Previous: Lathe And Planer Tools
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