方琪,董元,金自力,任慧平

• 1:内蒙古科技大学材料与冶金学院
• 2:内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室
• 3:马鞍山钢铁股份有限公司

摘要(Abstract)：

在未加镧和添加镧两种成分高铌钢的基础上,应用Gleeble-1500D热模拟试验机进行压缩试验,得到了试验钢在900℃等温弛豫时的应力松弛曲线。运用Thermo Icap6300电感耦合等离子体原子发射光谱仪、ZEISS Supra55型场发射扫描电子显微镜和Tecnai F30场发射透射电子显微镜,研究了试验钢弛豫淬火后铌的固溶量、含铌相析出行为的变化规律。结果表明,La抑制了含铌相在900℃(奥氏体区)的析出动力学过程,延长了含铌相在900℃(奥氏体区)的应变诱导析出开始时间(约14 s)及结束时间(约36 s)。当加热温度为1250℃时,La使加热过程中铌的固溶量百分比提高30.6%。等温弛豫后,La使等温弛豫过程中铌的析出量百分比增加了29.6%,析出物颗粒尺寸有所粗化。

关键词(KeyWords)： 等温弛豫;La;高铌钢;析出行为

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51201086);; 内蒙古科技大学材料与冶金学院青年人才孵化器项目(2014CY012)

作者(Author): 方琪,董元,金自力,任慧平

DOI: 10.13289/j.issn.1009-6264.2016.07.018

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