Function and Application of 42CrMo4

Hit：102026-01-19 11:18:52　

Function and Application of 42CrMo4
1) Suitable for making medium to large molds.
2) It is a plastic mold steel with a hardness of 30HRC and wide applications.
3) Suitable for large mold cavities with high requirements for wear resistance, toughness, and roughness.
4) Suitable for producing large and medium-sized plastic molds that require certain strength and toughness.
Hot processing specifications
Heating temperature is 1150~1200 ° C, starting temperature is 1130~1180 ° C, ending temperature is>850 ° C, and when the diameter is>50mm, slow cooling is required.
Normalization standard
The normalizing temperature is 850~900 ° C, and it is air-cooled after being discharged from the furnace.
High temperature tempering specification
Tempering temperature is 680-700 ° C, and it is air cooled after being taken out of the furnace.

Quenching and tempering specifications。

Preheating temperature 680~700 ° C, quenching temperature 840~880 ° C, oil cooling, tempering temperature 580 ° C, water cooling or oil cooling, hardness ≤ 217HBW.
Specification for strengthening and toughening treatment by sub temperature quenching
Quenching temperature 900 ° C, tempering temperature 560 ° C, hardness (37 ± 1) HRC
Induction hardening and tempering specifications
The quenching temperature is 900 ° C, the tempering temperature is 150-180 ° C, and the hardness is 54-60HRC.
42CrMo steel belongs to ultra-high strength steel, with high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low-temperature impact toughness. This steel is suitable for manufacturing large and medium-sized plastic molds that require certain strength and toughness. High strength and hardenability, good toughness, minimal deformation during quenching, and high creep strength and endurance strength at high temperatures. Used for manufacturing forgings with higher strength and larger quenched and tempered section requirements than 35CrMo steel, such as large gears for locomotive traction, booster transmission gears, pressure vessel gears, rear axles, connecting rods and spring clips with extremely high loads. It can also be used for oil well drill pipe joints and fishing tools below 2000m, and can be used for molds for bending machines.