Abstract: Structure and mechanical properties of ESR high strength steel 30NCD16(0.31C,1.41Cr,4.01Ni, 0.52Mo) quenched at 840~930℃ and tempered at 350~625℃ have been tested. Results showed that optimum heat treatment process for high strength steel 30NCD16 was quenching at 840~870℃+ tempering at 560 ℃ to get fine and homogeneous sorbite structure, tensile strength of steel≥1200MPa and impact energy A_KU5≥50J.

摘要： 试验了电渣重熔高强度钢30NCD16(％:0．31C、1．41Cr、4.01Ni、0．52Mo)840-930℃淬火、350-625℃回火时的组织和力学性能。结果表明,高强度钢30NCD16最佳热处理工艺为840-870℃淬火+560℃回火,可获得细致均匀的索氏体组织,钢的抗拉强度≥1 200 MPa,冲击功A_KU5≥50 J。