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一种新型高碳低合金钢，经３００～３７０℃等温处理，获得板条状无碳化物贝氏体与薄膜状残留奥氏体交替均匀排列的奥氏体－贝氏体复相组织，具有很高的强韧性。研究了该钢的常规力学性能，与淬火回火的ＡＩＳＩ４３４０钢进行了比较，分析了奥氏体含量对常规力学性能的影响，探讨了奥氏体－贝氏体组织与常规力学性能之间的关系。
A new type of high-carbon and low-alloy steel isothermally treated at 300-370 ° C to obtain an austenite-bainitic duplex structure in which strip-like carbide-free bainite and film-like residual austenite are arranged alternately and alternately, High toughness. The conventional mechanical properties of the steel were studied and compared with the quenched and tempered AISI4340 steel. The influence of austenite content on the conventional mechanical properties was analyzed. The relationship between the austenite - bainite structure and the conventional mechanical properties relationship.