The experiment of commercial heat treatment process for 82 mm plate of steel 14Cr1MoR (0. 15C- 1.48Cr- 0.57Mo)has been carried out at Wuyang Iron and Steel. The test results showed that heat- treated with 9℃/min heating up speed
austenite conditioning at 930 ℃ for 2.4 min/mm
water quenching at 870 ℃
and tempering at 680 ℃ for 3.0 min/mm
air cooling
the structure of steel was sorbite
of which the ambient tensile strength was 590~650 MPa
yield strength 445~485 MPa
elongation 27%~28%
reduction of area 73%~75%
cross impact energy 173~212 J
and the Qo.z at 580℃ was 295~330 MPa. The properties of different parts of plate were uniform up to the requirement of stan- dard.