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Steel MakingApplication Of Liberty Engine Materials To The Automotive IndustryThe success of the Liberty engine program was an engineer... Heavy Forging Practice In heavy forging practice where the metal is being worked at... Brown Automatic Signaling Pyrometer In large heat-treating plants it has been customary to mainta... Chromium Chromium when alloyed with steel, has the characteristic func... Rate Of Absorption According to Guillet, the absorption of carbon is favored by ... For Milling Cutters And Formed Tools FORGING.--Forge as before.--ANNEALING.--Place the steel in a ... High-chromium Or Rust-proof Steel High-chromium, or what is called stainless steel containing f... Judging The Heat Of Steel While the use of a pyrometer is of course the only way to hav... Typical Oil-fired Furnaces Several types of standard oil-fired furnaces are shown herew... Heat Treatment Of Steel Heat treatment consists in heating and cooling metal at defin... Cyanide Bath For Tool Steels All high-carbon tool steels are heated in a cyanide bath. Wi... Lathe And Planer Tools FORGING.--Gently warm the steel to remove any chill, is parti... Carbon In Tool Steel Carbon tool steel, or tool steel as it is commonly called, us... Shrinking And Enlarging Work Steel can be shrunk or enlarged by proper heating and cooling... Hardening Operation Hardening a gear is accomplished as follows: The gear is tak... Pyrometers For Molten Metal Pyrometers for molten metal are connected to portable thermoc... Silicon Silicon prevents, to a large extent, defects such as gas bubb... Pickling The Forgings The forgings were then pickled in a hot solution of either ni... Conclusions Martien was probably never a serious contender for the honor ... A Satisfactory Luting Mixture A mixture of fireclay and sand will be found very satisfactor... |
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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