Steel MakingGearsThe material used for all gears on the Liberty engine was sel... Leeds And Northrup Optical Pyrometer The principles of this very popular method of measuring tempe... Carbon In Tool Steel Carbon tool steel, or tool steel as it is commonly called, us... Chrome-nickel Steel Forging heat of chrome-nickel steel depends very largely on ... Hardening Carbon Steel For Tools For years the toolmaker had full sway in regard to make of st... An Automatic Temperature Control Pyrometer Automatic temperature control instruments are similar to the ... The Quenching Tank The quenching tank is an important feature of apparatus in c... Temperature For Annealing Theoretically, annealing should be accomplished at a tempera... Heat Treatment Of Milling Cutters Drills Reamers Etc THE FIRE.--Gas and electric furnaces designed for high heats ... Quenching It is considered good practice to quench alloy steels from th... Heat Treatment Of Steel Heat treatment consists in heating and cooling metal at defin... Preventing Cracks In Hardening The blacksmith in the small shop, where equipment is usually ... Non-shrinking Oil-hardening Steels Certain steels have a very low rate of expansion and contract... A Chromium-cobalt Steel The Latrobe Steel Company make a high-speed steel without tun... Classifications Of Steel Among makers and sellers, carbon tool-steels are classed by g... Quenching Tool Steel To secure proper hardness, the cooling of quenching of steel ... Cyanide Bath For Tool Steels All high-carbon tool steels are heated in a cyanide bath. Wi... Lathe And Planer Tools TO FORGE.--Gently warm the steel to remove any chill is parti... Molybdenum Molybdenum steels have been made commercially for twenty-five... Carburizing Low-carbon Sleeves Low-carbon sleeves are carburized and pushed on malleable-ir... |
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
Viewed 9646 |
||||||||||||||||||||
