| ". . . The sun had hardly risen when we left the house. We were looking for quail, each with a shotgun, but we had only one dog. Morgan said that our best ground was beyond a certain ridge that he pointed out, and we crossed it by a trail throu... Read more of What May Happen In A Field Of Wild Oats at Scary Stories.ca |  InformationalPrivacy |
Steel MakingHigh-carbon Machinery SteelThe carbon content of this steel is above 30 points and is ha... Judging The Heat Of Steel While the use of a pyrometer is of course the only way to hav... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... 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... Pyrometers For Molten Metal Pyrometers for molten metal are connected to portable thermoc... Protective Screens For Furnaces Workmen needlessly exposed to the flames, heat and glare from... The Electric Process The fourth method of manufacturing steel is by the electric f... Tool Or Crucible Steel Crucible steel can be annealed either in muffled furnace or b... Pyrometers Armor plate makers sometimes use the copper ball or Siemens' ... Properties Of Steel Steels are known by certain tests. Early tests were more or l... Heat-treating Department The heat-treating department occupies an L-shaped building. ... Quenching Tool Steel To secure proper hardness, the cooling of quenching of steel ... The Packing Department In Fig. 56 is shown the packing pots where the work is packe... Connecting Rods The material used for all connecting rods on the Liberty engi... Complete Calibration Of Pyrometers For the complete calibration of a thermo-couple of unknown e... Tempering Colors On Carbon Steels Opinions differ as to the temperature which is indicated by t... Annealing Method Forgings which are too hard to machine are put in pots with ... Manganese Manganese adds considerably to the tensile strength of steel,... Temperature For Annealing Theoretically, annealing should be accomplished at a tempera... |
Heat Treatment Of Gear BlanksCategory: HEAT TREATMENT OF STEEL This section is based on a paper read before the American Gear Manufacturers' Association at White Sulphur Springs, W. Va., Apr. 18, 1918. Great advancement has been made in the heat treating and hardening of gears. In this advancement the chemical and metallurgical laboratory have played no small part. During this time, however, the condition of the blanks as they come to the machine shop to be machined has not received its share of attention. There are two distinct types of gears, both types having their champions, namely, carburized and heat-treated. The difference between the two in the matter of steel composition is entirely in the carbon content, the carbon never running higher than 25-point in the carburizing type, while in the heat-treated gears the carbon is seldom lower than 35-point. The difference in the final gear is the hardness. The carburized gear is file hard on the surface, with a soft, tough and ductile core to withstand shock, while the heat-treated gear has a surface that can be touched by a file with a core of the same hardness as the outer surface. Next: Annealing Work Previous: Judging The Heat Of Steel
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