Transactions of the American Society for Steel Treating, Volumen5American Society for Steel Treating., 1924 |
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Términos y frases comunes
alloy steels AMERICAN SOCIETY annealed austenite Brem carbon content carbon steel carbon-vanadium steel carburizing cementite cent carbon CHAIRMAN chapter chemical chromium Cleveland committee coupon course crystallization curves d'ARCAMBAL decarburization degrees Cent degrees Fahr dendrites depth discussion effect elastic limit eutectoid ferrite forging fracture hardening hardness heat treating heat treatment held a meeting high-speed steel inch industrial ingot interesting Iron and Steel iron-carbon eutectoid laboratory machine magnetic malleable iron manganese manufacture martensite material melting metal metallurgical engineer metallurgist metastable method mold molten molybdenum nickel obtained operation oxide paper pearlite perature Pittsburgh Pot cooled practice present production Prof properties quenched QUESTION Rockwell rolled salt bath samples shown silicon slag SOCIETY FOR STEEL solid solution specimen standard steel castings STEEL TREATING February Steel Treating held STEEL TREATING January STEEL TREATING March street structure surface temperature tensile tion tool steel vanadium
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Página 254 - Full information and application blanks may be obtained from the United States Civil Service Commission, Washington, DC, or the secretary of the board of US civil-service examiners at the post office or customhouse in any city.
Página 279 - If a man write a better book, preach a better sermon or make a better mousetrap than his neighbor, though he build his house in the woods, the world will make a beaten path to his door.
Página 541 - Engineers. American Institute of Electrical Engineers. American Institute of Mining and Metallurgical Engineers. American Society for Metals.
Página 202 - But the art of experimentation leads from the first to the last link of the chain, without hesitation and without a blank, making successive use of Reason, which suggests an alternative, and of Experience, which decides on it, until, starting from a faint glimmer, the full blaze of light is reached.
Página 609 - Bulletin 212, recently published by the Department of the Interior, through the Bureau of Mines. The...
Página 271 - ... tensile properties. In the author's tests a slow rate was used in order to observe the deformations which were plotted to determine the elastic limit. In this respect, the values reported are on the low side as compared with values at ordinary testing speeds. 2. The tensile properties decrease with the length of time the specimen is held under load at a given temperature. This may be dismissed from consideration inasmuch as all specimens were tested in approximately the same length of time —...
Página 265 - ... gages are connected to the fixed rods L and rest on the moving rods M . Method of Test. — The test specimen is inserted in the heating unit and fixtures described. After the specimen has been at the desired temperature for at least one-half hour, an initial load of 100 Ib. is applied in order to eliminate all lost motion. The Ames gages are then set at zero after which equal increments of load are applied and simultaneous readings of gages recorded. The size of the increment applied depends...
Página 254 - to soften" but to heat to above the critical temperature and cool very slowly. Similar confusion as to meaning and application exists in regard to other terms and as a result "annealing," "tempering," "normalizing," etc., are being used by different people to mean widely ditlerent things.
Página 263 - Tests. In Fig. 17, A is an alundum tube upon which is wound the heating element B. This heating element is connected to the secondary of a transformer. The tube A is held in the container C and the space between D is filled with kieselguhr. The specimen under test, E, screws into the specimen holders F, which in turn screw into the testing machine adaptors G and H. G is the fixed member and H the moving member. When the...
Página 610 - Chrome-vanadium steels and chrome-vanadium-molybdenum steels are the latest development in structural alloy steels that have gained an extensive market. Almost all these steels are made in the openhearth furnace, chromium and vanadium alloys being added shortly before casting. In their physical properties these steels are much like chrome-nickel steels, but they have a greater construction of area for a given limit.