低碳贝氏体钢中的时效析出行为  

Aging precipitation in low carbon bainitic steels

作　　者：李闯[1] 王学敏[1] 周桂峰[2] 杨善武[1] 尚成嘉[1] 贺信莱[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]武钢(集团)公司技术中心,武汉430080

出　　处：《北京科技大学学报》2006年第6期534-538,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50471089);国家重大基础研究项目(No.2004CB19102)

摘　　要：测定了Cu-Nb-Cr-Mo系低碳贝氏体钢的时效硬度变化行为,在Gleeble-1500热模拟试验机上模拟了各钢种的蠕变行为,利用金相显微镜、TEM研究了不同钢种的微观组织与沉淀析出.结果表明,含铜钢在不同温度时效时会发生明显的时效硬化效应,在不同温度的蠕变曲线上会出现平台,平台现象是由于蠕变过程中出现了第二相析出,平台出现意味着开始了第二相析出,平台结束则析出过程结束.The aging hardening behavior of low carbon bainitic steels with Cu, Nb, Cr, and Mo was determined, and creep tests for various steels were conducted on a Gleeble-1500 thermal simulator. Optical microscope and TEM were employed to study the microstructure and precipitates of the steels respectively. The results indicate that there is an obvious aging hardening behavior during the aging of copper containing steels; a plateau occurs on the creep curve at different temperatures, which results from the precipitation. The occurrence of the plateau means the start of the precipitation process, and when the precipitation finishes the plateau disappears.

关 键 词：低碳贝氏体钢 蠕变 微观组织 时效析出 

分 类 号：TG142.1[一般工业技术—材料科学与工程]