CK45 /AISI 1045 steel shows reasonable strength and toughness. AISI 1045 will through harden to 2.5” (63mm) with a tensile strength of 66-120 Ksi (620-850 MPa) . This grade of steel is used for axles, bolts, forged connecting rods, crankshafts, torsion bars, light gears, guide rods etc .
Heat Treatment of AISI 1045 (CK45)
- AISI1045 (CK45) Annealing
Full annealing of small C1045 forgings is carried out from 1450-1600ºF (790-870ºC)
followed by furnace cooling at 50ºF (28ºC) per hour, to 1200ºF (650ºC) soaking and air cooling.
- AISI 1045 (CK45) Hardening
Hardening of this grade is carried out from an austenitizing temperature of 1475-1550ºF (800-845ºC) and oil or water quenching.
Flame and induction hardening may be carried out by heating quickly to the desired case depth and quenching in water or oil. This should be followed by a tempering treatment at 300-400ºF (150-200ºC) to reduce stresses in the case without affecting its hardness. A surface hardness of Rc 58 may be obtained by this treatment.
- Quenching of AISI 1045 (CK45) material
Quenching temperature / ℃ | salt bath furnace: 870
Quenching temperature / ℃ | controlled atmosphere furnace: 870
The heat preservation time/min: 5 ~ 15
Quenching medium: Water cooling
- Tempering Of AISI1045 (CK45)
Tempering temperature / ℃ : 552
After tempering hardness HRC or higher: 201-269HB .
Application of AISI 1045 (CK45)
Suitable for manufacturing various strong cutting tools with wear-resistant, resistant to impact. Advanced punching die, screw die, the toughness and complicated shape of the punch, etc. Roll cutting tool industry: scraper, serrated knife, iron knives, drill bits, etc.
Forging industry: forging die.
Screw industry: heading forming mould, such as teeth, punch