The microstructures and mechanical properties of bainite/martensite (B/M) multiphase steels treated with high-temperature duration and continuous cooling were studied. The steels treated at 623 K and cooling rate of 0.5 K/s exhibited a multiphase microstructure containing carbide-free bainite, martensite and film-like retained austenite. Observation in-situ showed the carbide-free bainite was nucleated and dispersed intragranularly with excellent tensile strength of 1920 MPa and total elongation of 14.6%.

中文翻译：

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无碳化贝氏体的形核部位和形态对贝氏体/马氏体多相钢组织和性能的影响

研究了经过高温持续冷却的贝氏体/马氏体（B / M）多相钢的组织和力学性能。在623 K和0.5 K / s的冷却速率下处理的钢表现出多相组织，其中包含无碳化物的贝氏体，马氏体和薄膜状残留奥氏体。原位观察表明，无碳化物的贝氏体成核并分散在颗粒内，具有出色的抗拉强度为1920 MPa，总伸长率为14.6％。