Steel MakingThe Effect Of Tempering On Water-quenched GagesThe following information has been supplied by Automatic and ... Preventing Cracks In Hardening The blacksmith in the small shop, where equipment is usually ... Tensile Properties Strength of a metal is usually expressed in the number of pou... Heating Of Manganese Steel Another form of heat-treating furnace is that which is used ... Placing Of Pyrometers When installing a pyrometer, care should be taken that it re... Steel Can Be Worked Cold As noted above, steel can be worked cold, as in the case of ... Critical Points One of the most important means of investigating the properti... Temperatures To Use As soon as the temperature of the steel reaches 100 deg.C. (... Cutting-off Steel From Bar To cut a piece from an annealed bar, cut off with a hack saw,... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... Lathe And Planer Tools TO FORGE.--Gently warm the steel to remove any chill is parti... Tempering Round Dies A number of circular dies of carbon tool steel for use in too... Composition And Properties Of Steel It is a remarkable fact that one can look through a dozen tex... Application Of Liberty Engine Materials To The Automotive Industry The success of the Liberty engine program was an engineer... Temperature Recording And Regulation Each furnace is equipped with pyrometers, but the reading an... Tungsten Tungsten, as an alloy in steel, has been known and used for a... Alloying Elements Commercial steels of even the simplest types are therefore p... The Care Of Carburizing Compounds Of all the opportunities for practicing economy in the heat-t... Robert Mushet Robert (Forester) Mushet (1811-1891), born in the Forest of D... Nickel Nickel may be considered as the toughest among the non-rare a... |
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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