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Steel MakingPreparing Parts For Local Case-hardeningAt the works of the Dayton Engineering Laboratories Company, ... Drop Forging Dies The kind of steel used in the die of course influences the he... Nickel-chromium A combination of the characteristics of nickel and the charac... Forging High-speed Steel Heat very slowly and carefully to from 1,800 to 2,000 deg.F.... Air-hardening Steels These steels are recommended for boring, turning and planing... Uses Of The Various Tempers Of Carbon Tool Steel DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres... Robert Mushet Robert (Forester) Mushet (1811-1891), born in the Forest of D... The Pyrometer And Its Use In the heat treatment of steel, it has become absolutely nece... Carbon Steels For Different Tools All users of tool steels should carefully study the different... Protective Screens For Furnaces Workmen needlessly exposed to the flames, heat and glare from... Piston Pin The piston pin on an aviation engine must possess maximum res... Leeds And Northrup Optical Pyrometer The principles of this very popular method of measuring tempe... The Electric Process The fourth method of manufacturing steel is by the electric f... Detrimental Elements Sulphur and phosphorus are two elements known to be detrimen... Chrome-nickel Steel Forging heat of chrome-nickel steel depends very largely on ... Temperature For Annealing Theoretically, annealing should be accomplished at a tempera... Correction For Cold-junction Errors The voltage generated by a thermo-couple of an electric pyrom... Manganese Manganese adds considerably to the tensile strength of steel,... Open Hearth Process The open hearth furnace consists of a big brick room with a l... Cyanide Bath For Tool Steels All high-carbon tool steels are heated in a cyanide bath. Wi... |
Heat Treatment Of Milling Cutters Drills Reamers EtcCategory: HIGH-SPEED STEEL THE FIRE.--Gas and electric furnaces designed for high heats are now made for treating high-speed steels. We recommend them for treating all kinds of Blue Chip tools and particularly the above class. After tools reach a yellow heat in the forge fire they must not be allowed to touch the fuel or come in contact with the blast or surrounding air. HEATING.--Tools of this kind should be heated to a mellow white heat, or as hot as possible without injuring the cutting edges (2,000 to 2,200 deg.F.). For most work the higher the heat the better the tool. Where furnaces are used, we recommend preheating the tools to a red heat in one furnace before putting them in a white hot furnace. COOLING.--We recommend quenching all of the above tools in oil when taken from the fire. We have found fish oil, cottonseed oil, Houghton's No. 2 soluble oil and linseed oil satisfactory. The high heat is the important thing in hardening Blue Chip tools. If a white hot tool is allowed to cool in the open air it will be hard, but the air scales the tool. DRAWING THE TEMPER.--Tools of this class should be drawn considerably more than water-hardening steel for the same purpose. Next: Heat Treatment Of Punches And Dies Shears Taps Etc Previous: Heat Treatment Of Lathe Planer And Similar Tools
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