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Process specification for 42CrMo alloy steel pipe in production

2019-09-19 14:48:19

Hot working specification of 42CrMo alloy steel pipe:
When the heating temperature is 1150~1200 degrees C, the starting temperature is 1130~1180 degrees C, the termination temperature is more than 850 degrees C. When φ> 50mm, the cooling is slowly.

Normalizing specification of 42CrMo alloy steel pipe:
Normalizing temperature is 850 ~900 C, and air-cooled out of the furnace.

Specification for high temperature tempering of 42CrMo alloy steel pipe:
Tempering temperature is 680 ~700 C, and the furnace is air-cooled.

Specification for quenching and tempering of 42CrMo alloy steel pipe:
The preheating temperature is 680~700 degrees C, quenching temperature is 840~880 degrees C, oil-cooled, tempering temperature is 580 degrees C, water-cooled or oil-cooled, hardness is less than 217 HBW.

Specification for subcritical strength and toughening of 42CrMo alloy steel pipe:
Specification for induction quenching tempering of HRC with quenching temperature 900 C, tempering temperature 560 C and hardness (37± 1)
Quenching temperature 900 C, tempering temperature 150 180 C, hardness 54-60HRC.

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