Steel MakingHeat-treating Equipment And Methods For Mass ProductionThe heat-treating department of the Brown-Lipe-Chapin Company... Carburizing Material The simplest carburizing substance is charcoal. It is also th... Crucible Steel Crucible steel is still made by melting material in a clay or... Typical Oil-fired Furnaces Several types of standard oil-fired furnaces are shown herew... 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... Care In Annealing Not only will benefits in machining be found by careful anne... Effect Of Different Carburizing Material [Illustrations: FIGS. 33 to 37.] Each of these different p... Gas Consumption For Carburizing Although the advantages offered by the gas-fired furnace for ... High Speed Steel For centuries the secret art of making tool steel was handed ... Temperatures To Use As soon as the temperature of the steel reaches 100 deg.C. (... Tensile Properties Strength of a metal is usually expressed in the number of pou... Carbon Steels For Different Tools All users of tool steels should carefully study the different... Manganese Manganese adds considerably to the tensile strength of steel,... The Care Of Carburizing Compounds Of all the opportunities for practicing economy in the heat-t... High-chromium Or Rust-proof Steel High-chromium, or what is called stainless steel containing f... Hardening Carbon Steel For Tools For years the toolmaker had full sway in regard to make of st... Mushet And Bessemer That Mushet was "used" by Ebbw Vale against Bessemer is, perh... Robert Mushet Robert (Forester) Mushet (1811-1891), born in the Forest of D... Uses Of The Various Tempers Of Carbon Tool Steel DIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres... |
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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