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Steel MakingComplete Calibration Of PyrometersFor the complete calibration of a thermo-couple of unknown e... Temperatures To Use As soon as the temperature of the steel reaches 100 deg.C. (... Care In Annealing Not only will benefits in machining be found by careful anne... The Influence Of Size The size of the piece influences the physical properties obta... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Composition And Properties Of Steel It is a remarkable fact that one can look through a dozen tex... Tempering Round Dies A number of circular dies of carbon tool steel for use in too... Heat-treating Equipment And Methods For Mass Production The heat-treating department of the Brown-Lipe-Chapin Company... Carbon Steels For Different Tools All users of tool steels should carefully study the different... Suggestions For Handling High-speed Steels The following suggestions for handling high-speed steels are ... Properties Of Steel Steels are known by certain tests. Early tests were more or l... Preventing Decarbonization Of Tool Steel It is especially important to prevent decarbonization in such... Case-hardening Treatments For Various Steels Plain water, salt water and linseed oil are the three most co... Critical Points One of the most important means of investigating the properti... Rate Of Absorption According to Guillet, the absorption of carbon is favored by ... Heating Of Manganese Steel Another form of heat-treating furnace is that which is used ... Quenching Tool Steel To secure proper hardness, the cooling of quenching of steel ... William Kelly's Air-boiling Process An account of Bessemer's address to the British Association w... Lathe And Planer Tools TO FORGE.--Gently warm the steel to remove any chill is parti... Tool Or Crucible Steel Crucible steel can be annealed either in muffled furnace or b... |
Annealing Alloy SteelCategory: ANNEALING The term alloy steel, from the steel maker's point of view, refers largely to nickel and chromium steel or a combination of both. These steels are manufactured very largely by the open-hearth process, although chromium steels are also a crucible product. It is next to impossible to give proper directions for the proper annealing of alloy steel unless the composition is known to the operator. Nickel steels may be annealed at lower temperatures than carbon steels, depending upon their alloy content. For instance, if a pearlitic carbon steel may be annealed at 1,450 deg.C., the same analysis containing 2-1/2 per cent nickel may be annealed at 1,360 deg.C. and a 5 per cent nickel steel at 1,270 deg.. In order that high chromium steels may be readily machined, they must be heated at or slightly above the critical for a very long time, and cooled through the critical at an extremely slow rate. For a steel containing 0.9 to 1.1 per cent carbon, under 0.50 per cent manganese, and about 1.0 per cent chromium, Bullens recommends the following anneal: 1. Heat to 1,700 or 1,750 deg.F. 2. Air cool to about 800 deg.F. 3. Soak at 1,425 to 1,450 deg.F. 4. Cool slowly in furnace. Next: High-carbon Machinery Steel Previous: Tool Or Crucible Steel
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