Steel MakingCarbon In Tool SteelCarbon tool steel, or tool steel as it is commonly called, us... Forging High-speed Steel Heat very slowly and carefully to from 1,800 to 2,000 deg.F.... Process Of Carburizing Carburizing imparts a shell of high-carbon content to a low-... Case-hardening Treatments For Various Steels Plain water, salt water and linseed oil are the three most co... Introduction Of Carbon The matter to which these notes are primarily directed is the... Tungsten Tungsten, as an alloy in steel, has been known and used for a... Flange Shields For Furnaces Such portable flame shields as the one illustrated in Fig. 1... The Pyrometer And Its Use In the heat treatment of steel, it has become absolutely nece... Hardening Operation Hardening a gear is accomplished as follows: The gear is tak... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... Annealing In Bone Steel and cast iron may both be annealed in granulated bone. ... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Nickel-chromium A combination of the characteristics of nickel and the charac... Uses Of The Various Tempers Of Carbon Tool Steel DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres... Carbon-steel Forgings Low-stressed, carbon-steel forgings include such parts as car... Steel Before The 1850's In spite of a rapid increase in the use of machines and the ... Manganese Manganese adds considerably to the tensile strength of steel,... Making Steel Balls Steel balls are made from rods or coils according to size, st... The Electric Process The fourth method of manufacturing steel is by the electric f... Preventing Decarbonization Of Tool Steel It is especially important to prevent decarbonization in such... |
Non-shrinking Oil-hardening SteelsCategory: ALLOYS AND THEIR EFFECT UPON STEEL Certain steels have a very low rate of expansion and contraction in hardening and are very desirable for test plugs, gages, punches and dies, for milling cutters, taps, reamers, hard steel bushings and similar work. It is recommended that for forging these steels it be heated slowly and uniformly to a bright red, but not in a direct flame or blast. Harden at a dull red heat, about 1,300 deg.F. A clean coal or coke fire, or a good muffle-gas furnace will give best results. Fish oil is good for quenching although in some cases warm water will give excellent results. The steel should be kept moving in the bath until perfectly cold. Heated and cooled in this way the steel is very tough, takes a good cutting edge and has very little expansion or contraction which makes it desirable for long taps where the accuracy of lead is important. The composition of these steels is as follows: Per cent Manganese 1.40 to 1.60 Carbon 0.80 to 0.90 Vanadium 0.20 to 0.25 Next: Effect Of A Small Amount Of Copper In Medium-carbon Steel Previous: Properties Of Alloy Steels
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