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Steel MakingCarburizing Low-carbon SleevesLow-carbon sleeves are carburized and pushed on malleable-ir... The Theory Of Tempering Steel that has been hardened is generally harder and more br... Placing Of Pyrometers When installing a pyrometer, care should be taken that it re... Silicon SILICON is a very widespread element (symbol Si), being an es... Knowing What Takes Place How are we to know if we have given a piece of steel the ver... Preparing Parts For Local Case-hardening At the works of the Dayton Engineering Laboratories Company, ... Rate Of Cooling At the option of the manufacturer, the above treatment of gea... Annealing Work With the exception of several of the higher types of alloy s... Affinity Of Nickel Steel For Carbon The carbon- and nickel-steel gears are carburized separately... Rate Of Absorption According to Guillet, the absorption of carbon is favored by ... Chrome-nickel Steel Forging heat of chrome-nickel steel depends very largely on ... Heat-treating Department The heat-treating department occupies an L-shaped building. ... Steel Worked In Austenitic State As a general rule steel should be worked when it is in the a... Classifications Of Steel Among makers and sellers, carbon tool-steels are classed by g... Tool Or Crucible Steel Crucible steel can be annealed either in muffled furnace or b... Correction For Cold-junction Errors The voltage generated by a thermo-couple of an electric pyrom... Quenching Tool Steel To secure proper hardness, the cooling of quenching of steel ... Leeds And Northrup Optical Pyrometer The principles of this very popular method of measuring tempe... Pyrometers Armor plate makers sometimes use the copper ball or Siemens' ... William Kelly's Air-boiling Process An account of Bessemer's address to the British Association w... |
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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