对低碳硅锰钢进行了水淬和随后的两相区退火与贝氏体区等温处理,利用光学显微镜、扫描电镜和透射电镜对热处理后试验钢的显微组织进行了观察,采用X射线衍射仪测定了钢中残余奥氏体含量,通过拉伸试验测试了钢的力学性能.结果表明:两相区退火冷却后试验钢的显微组织为铁素体与马氏体,随着两相区退火温度的升高和保温时间的延长,铁素体含量减少,马氏体含量增多,其中铁素体大部分为长条状;经贝氏体区等温处理后,显微组织中的残余奥氏体大部分以板条状存在于贝氏体板条界,极少量以块状存在于先共析铁素体内,其含量随着退火温度的升高和保温时间的延长先增加后降低,在780 ℃保温5 min时达到最大值;试验钢抗拉强度和屈服强度均随着退火温度升高和保温时间延长单调上升,伸长率在780 ℃等温5 min时达到最大值.
所属栏目
材料性能及其应用
收稿日期
2008/9/162009/4/15
作者单位
齐艳萍:辽宁科技大学材料科学与工程学院, 鞍山 114051
李维娟:辽宁科技大学材料科学与工程学院, 鞍山 114051
备注
齐艳萍(1978-),女,辽宁鞍山人,助教,硕士.
引用该论文:
QI Yan-ping,LI Wei-juan.Effect of Annealing in Two-phase Region on Microstructure and Mechanical Properties of TRIP Steels[J].Materials for mechancial engineering,2009,33(9):85～89
齐艳萍,李维娟.两相区退火对相变诱发塑性钢显微组织与力学性能的影响[J].机械工程材料,2009,33(9):85～89
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