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Steel MakingCorrosionThis steel like any other steel when distorted by cold worki... Introduction Of Carbon The matter to which these notes are primarily directed is the... Piston Pin The piston pin on an aviation engine must possess maximum res... High-chromium Or Rust-proof Steel High-chromium, or what is called stainless steel containing f... Mushet And Bessemer That Mushet was "used" by Ebbw Vale against Bessemer is, perh... Typical Oil-fired Furnaces Several types of standard oil-fired furnaces are shown herew... Alloying Elements Commercial steels of even the simplest types are therefore p... Pyrometers For Molten Metal Pyrometers for molten metal are connected to portable thermoc... Vanadium Vanadium has a very marked effect upon alloy steels rich in c... Annealing To Relieve Internal Stresses Work quenched from a high temperature and not afterward tempe... Restoring Overheated Steel The effect of heat treatment on overheated steel is shown gra... Steel Worked In Austenitic State As a general rule steel should be worked when it is in the a... Placing Of Pyrometers When installing a pyrometer, care should be taken that it re... Heat Treatment Of Punches And Dies Shears Taps Etc HEATING.--The degree to which tools of the above classes shou... Annealing There is no mystery or secret about the proper annealing of d... Judging The Heat Of Steel While the use of a pyrometer is of course the only way to hav... Hardness Testing The word hardness is used to express various properties of me... Crucible Steel Crucible steel is still made by melting material in a clay or... Standard Analysis The selection of a standard analysis by the manufacturer is t... Quenching The Work In some operations case-hardened work is quenched from the bo... |
S A E Heat TreatmentsCategory: HEAT TREATMENT OF STEEL The Society of Automotive Engineers have adopted certain heat treatments to suit different steels and varying conditions. These have already been referred to on pages 39 to 41 in connection with the different steels used in automobile practice. These treatments are designated by letter and correspond with the designations in the table. HEAT TREATMENTS Heat Treatment A After forging or machining: 1. Carbonize at a temperature between 1,600 deg.F. and 1,750 deg.F. (1,650-1,700 deg.F. desired.) 2. Cool slowly or quench. 3. Reheat to 1,450-1,500 deg.F. and quench. Heat Treatment B After forging or machining: 1. Carbonize between 1,600 deg.F. and 1,750 deg.F. (1,650-1,700 deg.F. Desired.) 2. Cool slowly in the carbonizing mixture. 3. Reheat to 1,550-1,625 deg.F. 4. Quench. 5. Reheat to 1,400-1,450 deg.F. 6. Quench. 7. Draw in hot oil at 300 to 450 deg.F., depending upon the degree of hardness desired. Heat Treatment D After forging or machining: 1. Heat to 1,500-1,600 deg.F. 2. Quench. 3. Reheat to 1,450-1,500 deg.F. 4. Quench. 5. Reheat to 600-1,200 deg.F. and cool slowly. Heat Treatment E After forging or machining: 1. Heat to 1,500-1,550 deg.F. 2. Cool slowly. 3. Reheat to 1,450-1,500 deg.F. 4. Quench. 5. Reheat to 600-1,200 deg.F. and cool slowly. Heat Treatment F After shaping or coiling: 1. Heat to 1,425-1,475 deg.F. 2. Quench in oil. 3. Reheat to 400-900 deg.F., in accordance with temper desired and cool slowly. Heat Treatment G After forging or machining: 1. Carbonize at a temperature between 1,600 deg.F. and 1,750 deg.F. (1,650-1,700 deg.F. desired). 2. Cool slowly in the carbonizing mixture. 3. Reheat to 1,500-1,550 deg.F. 4. Quench. 5. Reheat to 1,300-1,400 deg.F. 6. Quench. 7. Reheat to 250-500 deg.F. (in accordance with the necessities of the case) and cool slowly. Heat Treatment H After forging or machining: 1. Heat to 1,500-1,600 deg.F. 2. Quench. 3. Reheat to 600-1,200 deg.F. and cool slowly. Heat Treatment K After forging or machining: 1. Heat to 1,500-1,550 deg.F. 2. Quench. 3. Reheat to 1,300-1,400 deg.F. 4. Quench. 5. Reheat to 600-1,200 deg.F. and cool slowly. Heat Treatment L After forging or machining: 1. Carbonize between 1,600 deg.F. and 1,750 deg.F. (1,650-1,700 deg.F. desired). 2. Cool slowly in the carbonizing mixture. 3. Reheat to 1,400-1,500 deg.F. 4. Quench. 5. Reheat to 1,300-1,400 deg.F. 6. Quench. 7. Reheat to 250-500 deg.F. and cool slowly. Heat Treatment M After forging or machining: 1. Heat to 1,450-1,500 deg.F. 2. Quench. 3. Reheat to 500-1.250 deg.F. and cool slowly. Heat Treatment P After forging or machining: 1. Heat to 1,450-1,500 deg.F. 2. Quench. 3. Reheat to 1,375-1,450 deg.F. slowly. 4. Quench. 5. Reheat to 500-1,250 deg.F. and cool slowly. Heat Treatment Q After forging: 1. Heat to 1,475-1,525 deg.F. (Hold at this temperature one-half hour, to insure thorough heating.) 2. Cool slowly. 3. Machine. 4. Reheat to 1,375-1,425 deg.F. 5. Quench. 6. Reheat to 250-550 deg.F. and cool slowly. Heat Treatment R After forging: 1. Heat to 1,500-1,550 deg.F. 2. Quench in oil. 3. Reheat to 1,200-1,300 deg.F. (Hold at this temperature three hours.) 4. Cool slowly. 5. Machine. 6. Reheat to 1,350-1,450 deg.F. 7. Quench in oil. 8. Reheat to 250-500 deg.F. and cool slowly. Heat Treatment S After forging or machining: 1. Carbonize at a temperature between 1,600 and 1,750 deg.F. (1,650-1,700 deg.F. Desired.) 2. Cool slowly in the carbonizing mixture. 3. Reheat to 1,650-1,750 deg.F. 4. Quench. 5. Reheat to 1,475-1,550 deg.F. 6. Quench. 7. Reheat to 250-550 deg.F. and cool slowly. Heat Treatment T After forging or machining: 1. Heat to 1,650-1,750 deg.F. 2. Quench. 3. Reheat to 500-1,300 deg.F. and cool slowly. Heat Treatment U After forging: 1. Heat to 1,525-1,600 deg.F. (Hold for about one-half hour.) 2. Cool slowly. 3. Machine. 4. Reheat to 1,650-1,700 deg.F. 5. Quench. 6. Reheat to 350-550 deg.F. and cool slowly. Heat Treatment V After forging or machining: 1. Heat to 1,650-1,750 deg.F. 2. Quench. 3. Reheat to 400-1,200 deg.F. and cool slowly. Next: Restoring Overheated Steel Previous: Drop Forging Dies
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