Optimized Properties of a Quenching and Partitioning Steel by Quenching at Fine Martensite Start Temperature
Optimized Properties of a Quenching and Partitioning Steel by Quenching at Fine Martensite Start Temperature
复制标题
通过在细马氏体起始温度淬火优化淬火和分配钢的性能
DOI：
10.1007/s12540-020-00726-5
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发表时间：
2020-05-16
影响因子：
3.5
通讯作者：
Xu, Guang
中科院分区：
文献类型：
--
作者：
Liu, Man;Wang, Jun;Xu, Guang
摘要设计了5种淬火温度，研究了残余奥氏体体积分数与中碳淬火配分（Q&P）钢组织、力学性能的关系。一般认为，Q&P钢的最佳力学性能是在最佳淬火温度下获得的，该温度对应于最大残余奥氏体量。然而，本工作澄清了Q&P钢中残余奥氏体的最大体积分数确实与钢的最佳力学性能无关。在细马氏体起始温度下淬火，得到由粗马氏体板条、分散贝氏体和薄残余奥氏体膜组成的微观组织，使Q&P钢的综合力学性能达到最佳，伸长率较好，但屈服强度和抗拉强度略低。图形抽象
AbstractFive quenching temperatures were designed to investigate the relationship between volume fraction of retained austenite and microstructure, mechanical properties of a medium carbon quenching and partitioning (Q&P) steel. It is normally accepted that the optimal mechanical property of Q&P steels is obtained by quenching at optimum temperature, which corresponds to the maximum amount of retained austenite. However, the present work clarified that maximum volume fraction of retained austenite in Q&P steels is indeed unrelated to the optimum mechanical property of steels. The microstructure consisting of coarse martensite laths, dispersive bainite and thin retained austenite films was obtained by quenching at fine martensite start temperature (FMs), resulting in the optimum comprehensive mechanical property of Q&P steel with the better elongation at the expense of slightly smaller yield strength and tensile strength.Graphic Abstract