等温淬火对纳米贝氏体钢的组织和力学性能的影响

王玉钊, 蒋中华, 贾春妮, 张玉妥, 王培

Microstructure and Mechanical Properties of an Austempered Nanostructured Bainitic Steel

WANG Yuzhao, JIANG Zhonghua, JIA Chunni, ZHANG Yutuo, WANG Pei

表2 在不同等温淬火条件下残余奥氏体的体积分数、残余奥氏体中碳含量和M/A岛的体积分数

Table 2 Volume fraction of retained austenite, carbon content in retained austenite and the volume fraction of M/A island in the samples with different austempering treatments

Austempering treatments Volume fraction of retained austenite / % Carbon content in retained austenite / % Volume fraction of M/A island / % Temperature / oC Time / h 230 8 28.9 ± 2.0 1.72 ± 0.041 13.56 ± 5.71 16 36.9 ± 2.5 1.81 ± 0.022 2.15 ± 0.54 48 41.1 ± 0.8 1.80 ± 0.008 1.29 ± 0.42 270 8 30.3 ± 5.2 1.45 ± 0.059 7.99 ± 1.29 16 34.1 ± 0.3 1.74 ± 0.039 6.36 ± 2.30 48 45.6 ± 1.8 1.73 ± 0.018 4.29 ± 0.96