Influence of Martensite Fraction on Tensile Properties of Quenched and Partitioned (Q&P) Martensitic Stainless Steels
Influence of Martensite Fraction on Tensile Properties of Quenched and Partitioned (Q&P) Martensitic Stainless Steels
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DOI：
10.1002/srin.201500472
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发表时间：
2016-03
影响因子：
2.2
通讯作者：
Qiuliang Huang;C. Schröder;H. Biermann;O. Volkova;J. Mola
中科院分区：
文献类型：
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作者：
Qiuliang Huang;C. Schröder;H. Biermann;O. Volkova;J. Mola
通过简化的淬火和配分（Q&P）处理（淬火温度等于室温），在Q&P处理的Fe-Cr-C、Fe-Cr-C-Co和Fe-Cr-C-N不锈钢的显微组织中分别稳定了56、43和24体积%的奥氏体分数。奥氏体的机械稳定性通过在20 ° C至200 °C之间的温度下的拉伸试验来量化。与Q&P概念一致，发现奥氏体的稳定性对于具有最高马氏体分数的钢是最高的。通过奥氏体晶格参数的X射线衍射测量来估计加工成具有82体积%马氏体的Fe-Cr-C钢的试样中奥氏体的碳富集。结果表明，马氏体中只有约12%的碳分配到奥氏体中。回火碳化物的形成是碳富集显著偏离完全分配假设的机制之一。
By means of a simplified quenching and partitioning (Q&P) processing with quench temperature equal to room temperature, austenite fractions of 56, 43, and 24 vol% are stabilized in the microstructures of Q&P‐processed Fe–Cr–C, Fe–Cr–C–Co, and Fe–Cr–C–N stainless steels, respectively. The mechanical stability of austenite is quantified by tensile tests at temperatures between 20 and 200 °C. In agreement with the Q&P concept, the stability of austenite is found to be highest for the steel with the highest martensite fraction. The carbon enrichment of austenite in a specimen of the Fe–Cr–C steel processed to have 82 vol% martensite is estimated by X‐ray diffraction measurement of the austenite lattice parameter. The results indicate that only about 12% of the carbon contained in the martensite has partitioned into the austenite. The formation of tempering carbides is one of the mechanisms behind the significant deviation of the carbon enrichments from the full partitioning assumption.