Method for quenching large-size forged shaft piece
A large-scale, forging technology, applied in the direction of quenching agent, furnace type, furnace, etc., can solve the problems of uneven internal structure, slow cooling speed, insufficient hardness, etc., to avoid insufficient hardness, prevent quenching cracking, and slow heat transfer. Effect
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Embodiment 1
[0036] A kind of quenching method of large-scale shaft forging, described large-scale shaft forging is 35CrMo steel large-scale shaft forging, and its steps are:
[0037] (1) Prepare the quenching liquid. The composition and mass parts of the quenching liquid are: 10 parts of a mixture of polypropylene-methacrylic acid copolymer (referred to as PP-g-GAM, purchased from Hangzhou Tuomu Technology Co., Ltd.) and polyacrylamide (The mass ratio of polypropylene-methacrylic acid and polyacrylamide is 1:1), 3 parts of ethylene oxide and propylene oxide random copolymer (average molecular weight is 20000), 3 parts of polyamide polyethylene glycol, 0.4 parts of defoamer (polyether, average molecular weight 6000), 5 parts of water, 4 parts of dispersant (polydimethylsiloxane);
[0038] (2) Heat the large shaft forging (10 meters in length and 500mm in diameter) to 880°C, and then keep it warm for 2.2 hours;
[0039](3) quenching by immersing the large-scale shaft forging after the heat...
Embodiment 2
[0049] A kind of quenching method of large-scale shaft forging, described large-scale shaft forging is 35CrMo steel large-scale shaft forging, and its steps are:
[0050] (1) Prepare quenching liquid, the composition and mass parts of quenching liquid are: polypropylene-methacrylic acid copolymer (referred to as PP-g-GAM, purchased from Hangzhou Tuomu Technology Co., Ltd.) and 8 parts of polyacrylamide mixture (The mass ratio of polypropylene-methacrylic acid to polyacrylamide is 1:1), 4 parts of ethylene oxide and propylene oxide random copolymer (average molecular weight is 25000), 2 parts of polyamide polyethylene glycol, 0.5 parts of defoamer (polyether, average molecular weight 8000), 7 parts of water, 2 parts of dispersant (polydimethylsiloxane);
[0051] (2) Heat the large shaft forging (8 meters in length and 450mm in diameter) to 850°C, and then keep it warm for 3 hours;
[0052] (3) quenching by immersing the large-scale shaft forging after the heat preservation in ...
Embodiment 3
[0062] A kind of quenching method of large-scale shaft forging, described large-scale shaft forging is 35CrMo steel large-scale shaft forging, and its steps are:
[0063] (1) Prepare the quenching liquid. The composition and mass parts of the quenching liquid are: 12 parts of a mixture of polypropylene-methacrylic acid copolymer (referred to as PP-g-GAM, purchased from Hangzhou Tuomu Technology Co., Ltd.) and polyacrylamide (The mass ratio of polypropylene-methacrylic acid to polyacrylamide is 1:1), 2 parts of ethylene oxide and propylene oxide random copolymer (average molecular weight is 30000), 4 parts of polyamide polyethylene glycol, 0.6 parts of defoamer (polyether, average molecular weight 7000), 3 parts of water, 5 parts of dispersant polydimethylsiloxane;
[0064] (2) Heat a large shaft forging (5 meters in length, 400mm in diameter, with 3 grooves and 2 through holes on the shaft forging) to above 990°C, and then keep it warm for 2 hours;
[0065] (3) quenching by i...
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