42CrMo steel plate heat treatment
Annealed annealing No.1 "annealed at 760±10℃ and cooled to 400 degree air cooling.
HB220-230
Normalizing normalize No.4 860 + 10 degrees normalizing and air cooling.
Quenching + tempering No. 5 840±10℃ water or oil (depending on the complexity of the product), 680-700 degree tempering. HB<217
Quenching and tempering quenching+tempering No.6 840 +/- 10 degrees quenching oil, and then tempered at 470 degrees. HRC41-45
Quenching and tempering quenching+tempering No.7 840 +/- 10 degrees quenching oil, and then tempered at 480 degrees. HRC35-45
Quenching and tempering quenching+tempering No.8 quenching oil at 850 degrees, then tempered at 510 degrees. HRC38-42
Quenching and tempering quenching+tempering No.9 quenching oil at 850 degrees, then tempered at 500 degrees. HRC40-43
Quenching and tempering quenching+tempering No.10 850 degree quenching oil, and then tempered at 510 degrees. HRC36-42
Quenching and tempering quenching+tempering No.11 850 degree quenching oil, and then tempered at 560 degrees. HRC32-36
Quenching and tempering quenching+tempering No.12 quenching oil at 860 degrees, then tempered at 390 degrees. HRC48-52
Note: 1. steel composition (%): 0.43 C, 0.88Mn, 1.09Cr, 0.22Mo, 1.017P, 0.027S;
2. steel composition (%): 0.39C, 1.11Cr, 0.20Mo;
3. it is the transverse impact value in brackets.
Process specification of 42CrMo steel plate:
Hot working specification of 42CrMo steel plate:
The heating temperature is 1150 ~1200 degrees C, the starting temperature is 1130 ~1180 degree C, the termination temperature is 850 degrees C, and the retarding cooling is achieved when Phi > 50mm.
Normalizing specification of 42CrMo steel plate:
Normalizing temperature 850~900 degree C, air cooling.
Specification for high temperature tempering:
Tempering temperature 680~700 degrees C, air cooling.
Specification for quenching and tempering:
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 hardening and toughening treatment:
Quenching temperature is 900 degrees C, tempering temperature is 560 C, hardness is 37 + 1 HRC
Specification for induction hardening and tempering:
Quenching temperature is 900 degrees C, tempering temperature is 150~180 C, hardness is 54 ~60HRC.
Typical application of 42CrMo steel plate:
1) for opaque forming dies such as dishes, clamps, groceries, etc.
2) suitable for making large plastic moulds.
3) used for opaque forming die (TV mould, air conditioner shell mold).
4) for automobile parts mold, commonly used resin products, fixtures, etc.
5) suitable for making large and medium-sized plastic moulds which require certain strength and toughness.
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