42CrMo4 steel properties
1.Description of 42CrMo4 steel
42CrMo4 steel is a kind of common alloy steel, which is usually used after quenching and tempering. It has high strength and high hardenability. The properties of 42CrMo4 round steel are better than that of 34CrMo4 steel because of higher content of carbon and chromium. 42CrMo4 alloy also has high fatigue strength and good low temperature impact toughness. The temper brittleness is not obvious.
42CrMo4 steel is a kind of high-quality quenched and tempered alloy structural steel, which belongs to high-quality low-carbon, low-alloy Cr, Mo, Ni surface hardening steel. The hardness of oil quenching and tempering is 18-22 HRC. Annealing hardening is less than 250hb. 42CrMo4 has a low carbon content range, so it has good weldability.
2.Heat treatment of 42CrMo4 steel
Annealing of 42CrMo4 alloy structural steel
Heat slowly to 872 ℃ for enough time to allow the steel to heat thoroughly and then cool slowly in the furnace. The maximum hardness of 42CrMo4 alloy steel is 250 HB (Brinell hardness).
Hardening of alloy structural steel 42CrMo4
First, the quenching is slowly heated to 880 ° C, then fully soaked at this temperature and quenched in oil or water. The tool is tempered immediately after reaching room temperature. Second quenching to 780-820 ° C followed by quenching in oil or water.
Tempering of 42CrMo4 alloy structural steel
Heat to 205-649 ° C and then cool in water or oil. The normal delivery hardness is 18-22 HRC.
Forging of 42CrMo4 alloy steel
42CrMo4 alloy steel forged at 926 to 1205 ° C (1700 to 2200 ° f)
3. Application of 42CrMo4 steel
42CrMo4 steel is characterized by high strength, high hardenability, toughness and small deformation after quenching, high strength and creep fracture strength at high temperature. The requirement of manufacturing higher strength than 35CrMo steel and the cross section of tempering forging are larger, such as large locomotive traction gear, supercharger drive gear, pressure vessel, gear, rear axle, which are greatly affected by load and spring clip link. It can be used for 2000m deep oil drill pipe joint, fishing tool, bending machine mould, etc.
4. Processing of 42CrMo4 steel
42CrMo4 plate and alloy steel round bar can be cut according to your requirements. Can also provide 42CrMo4 alloy steel grounding rod, according to your requirements tolerance to provide high quality tool steel precision grounding tool steel bar. 42CrMo4 steel can also be used as grinding plate / gauge plate of standard and non-standard sizes.
