在清华大学贝氏体研究及推广中心以往工作的基础上，设计了一种新的1 500 MPa级经济型贝氏体/马氏体复相钢。该钢奥氏体化后空冷，就可获得具有较复杂精细结构的无碳化物贝氏体/马氏体复相组织。经低温回火后，其σb≥1 500 MPa，σ0.2≥1 200 MPa，δ5≥14 %，ψ≥57 %，aku≥100 J/cm2 ，并且组织细化，可进一步改善钢的氢脆敏感性。
Based on the work of Bainite Research and Development Center at Tsinghua University, a novel 1 500 MPa economical bainite/martensite duplex steel has been designed and investigated. A carbide free bainite with fine bainite/martensite mixed microstructure can be obtained by air-cooling after austenization. The properties of the new steel, tempered at 280 ℃, are as follows: σb≥1 500 MPa，σ0.2≥1 200 MPa，δ5≥14 %，ψ≥57 %，aku≥100 J/cm2. More fine microstructure may lower the susceptibility to hydrogen embrittlement of the steel.
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