摘要
运用热模拟技术、硬度测量及透射电镜(TEM)观察,研究了含Nb-Mo及Mo两种超低碳贝氏体钢的析出行为。结果表明:Nb-Mo贝氏体钢在850℃变形后弛豫过程中发生应变诱导析出,在析出颗粒中检测到Mo的存在,而简单成分的Mo含量为0.33%的C-Mo钢,变形后弛豫没有析出产生;两种钢在525℃时效1200 min过程中均形成硬度峰,Mo在时效过程中发生沉淀形成一个峰值;而Nb-Mo钢出现两个硬度峰,合金元素Mo与Nb存在较强的相互作用。
The thermal simulation test was employed to study the precipitation behaviour in two ultra-low carbon bainitic steels containing Mo and Nb-Mo element,respectively.The results show that the strain induced precipitates occurs during relaxation after deformation at 850 ℃ in Nb-Mo bainitic steel and the element Mo can be detected in the precipitates.However,no precipitates happen in C-Mo steel containing 0.33%Mo subjected to the same simulation.There are two hardness peaks founding in Nb-Mo bainitic steel and one peak can be observed in Mo-bearing steel aged at 525 ℃ for 1200 min.By TEM analysis,it can be found that strong interactions exist between element Mo and Nb.
出处
《热加工工艺》
CSCD
北大核心
2013年第24期57-59,63,共4页
Hot Working Technology
基金
河北省自然科学基金-钢铁联合研究基金(E2011105006)
新金属材料国家重点实验室开放课题(2011Z-05)资助
关键词
超低碳贝氏体钢
析出
弛豫
时效
ultra-low carbon bainitic steel
precipitation
relaxation
aging
