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Steel MakingHeat-treating Equipment And Methods For Mass ProductionThe heat-treating department of the Brown-Lipe-Chapin Company... Critical Points One of the most important means of investigating the properti... Heat-treating Department The heat-treating department occupies an L-shaped building. ... Suggestions For Handling High-speed Steels The following suggestions for handling high-speed steels are ... Nickel Nickel may be considered as the toughest among the non-rare a... Case-hardening Treatments For Various Steels Plain water, salt water and linseed oil are the three most co... Blending The Compound Essentially, this consists of the sturdy, power-driven separa... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Surface Carburizing Carburizing, commonly called case-hardening, is the art of pr... Sulphur Sulphur is another impurity and high sulphur is even a greate... Typical Oil-fired Furnaces Several types of standard oil-fired furnaces are shown herew... Annealing To Relieve Internal Stresses Work quenched from a high temperature and not afterward tempe... Carburizing By Gas The process of carburizing by gas, briefly mentioned on page ... Tempering Round Dies A number of circular dies of carbon tool steel for use in too... Annealing ANNEALING can be done by heating to temperatures ranging from... Robert Mushet Robert (Forester) Mushet (1811-1891), born in the Forest of D... Brown Automatic Signaling Pyrometer In large heat-treating plants it has been customary to mainta... The Leeds And Northrup Potentiometer System The potentiometer pyrometer system is both flexible and subst... High-carbon Machinery Steel The carbon content of this steel is above 30 points and is ha... Classifications Of Steel Among makers and sellers, carbon tool-steels are classed by g... |
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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