Steel MakingUses Of The Various Tempers Of Carbon Tool SteelDIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres... Manganese Manganese adds considerably to the tensile strength of steel,... The Quenching Tank The quenching tank is an important feature of apparatus in c... The Effect The heating at 1,600 deg.F. gives the first heat treatment w... Open Hearth Process The open hearth furnace consists of a big brick room with a l... Protectors For Thermo-couples Thermo-couples must be protected from the danger of mechanica... Compensating Leads By the use of compensating leads, formed of the same materia... Hardening The forgings can be hardened by cooling in still air or quen... Heat Treatment Of Milling Cutters Drills Reamers Etc THE FIRE.--Gas and electric furnaces designed for high heats ... Carburizing Low-carbon Sleeves Low-carbon sleeves are carburized and pushed on malleable-ir... Quality And Structure The quality of high-speed steel is dependent to a very great ... Cutting-off Steel From Bar To cut a piece from an annealed bar, cut off with a hack saw,... Making Steel Balls Steel balls are made from rods or coils according to size, st... Manganese MANGANESE is a metal much like iron. Its chemical symbol is M... Preventing Cracks In Hardening The blacksmith in the small shop, where equipment is usually ... Heat Treatment Of Punches And Dies Shears Taps Etc HEATING.--The degree to which tools of the above classes shou... Gears The material used for all gears on the Liberty engine was sel... Carbon Steels For Different Tools All users of tool steels should carefully study the different... Affinity Of Nickel Steel For Carbon The carbon- and nickel-steel gears are carburized separately... Pickling The Forgings The forgings were then pickled in a hot solution of either ni... |
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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