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Steel MakingHigh-carbon Machinery SteelThe carbon content of this steel is above 30 points and is ha... Application Of Liberty Engine Materials To The Automotive Industry The success of the Liberty engine program was an engineer... Heat Treatment Of Gear Blanks This section is based on a paper read before the American Gea... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... Quality And Structure The quality of high-speed steel is dependent to a very great ... S A E Heat Treatments The Society of Automotive Engineers have adopted certain heat... Quenching Tool Steel To secure proper hardness, the cooling of quenching of steel ... For Milling Cutters And Formed Tools FORGING.--Forge as before.--ANNEALING.--Place the steel in a ... Typical Oil-fired Furnaces Several types of standard oil-fired furnaces are shown herew... Silicon Silicon prevents, to a large extent, defects such as gas bubb... Steel Before The 1850's In spite of a rapid increase in the use of machines and the ... Rate Of Absorption According to Guillet, the absorption of carbon is favored by ... Tungsten Tungsten, as an alloy in steel, has been known and used for a... Carbon Tool Steel Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham... Forging High-speed Steel Heat very slowly and carefully to from 1,800 to 2,000 deg.F.... Heating Although it is possible to work steels cold, to an extent de... Double Annealing Water annealing consists in heating the piece, allowing it to... Heat Treatment Of Milling Cutters Drills Reamers Etc THE FIRE.--Gas and electric furnaces designed for high heats ... Machineability Reheating for machine ability was done at 100 deg. less than ... Annealing There is no mystery or secret about the proper annealing of d... |
GearsCategory: APPLICATION OF LIBERTY ENGINE MATERIALS TO THE AUTOMOTIVE INDUSTRY The material used for all gears on the Liberty engine was selected at the option of the manufacturer from the following standard S. A. E. steels, the composition of which are given in Table 12, TABLE 12.--COMPOSITION OF STEELS NOS. X-3,340 AND 6,140 Steel No X-3,340 6,140 Carbon, minimum 0.350 0.350 Carbon, maximum 0.450 0.450 Manganese, minimum 0.450 0.500 Manganese, maximum 0.750 0.800 Phosphorus, maximum 0.040 0.040 Sulphur, maximum 0.045 0.045 Nickel, minimum 2.750 Nickel, maximum 3.250 Chromium, minimum 0.700 0.800 Chromium, maximum 0.950 1.100 Vanadium, minimum 0.150 All gears were heat-treated to a scleroscope hardness of from 55 to 55. The heat treatment used to secure this hardness consisted in quenching the forgings from a temperature of 1,550 to 1,600 deg.F. in oil and annealing for good machineability at a temperature of from 1,300 to 1,350 deg.F. Forgings treated in this manner showed a Brinell hardness of from 177 to 217. Next: Rate Of Cooling Previous: Highly Stressed Parts
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