张国庆,王福明,庞瑞朋,李天生

• 1:北京科技大学钢铁冶金新技术国家重点试验室
• 2:北京科技大学冶金与生态工程学院

摘要(Abstract)：

利用Gleeble-1500热模拟试验机,对国产NM500钢化学成分基础上添加微量的合金元素Nb的实验钢的动态连续冷却转变(CCT)曲线进行了研究,实验结果表明:随Nb含量由0.018%增加到0.059%,实验钢的组织硬度提高;贝氏体转变出现和结束所需要的冷却速度提高,扩大了工艺参数选择的操作性;在冷速为5~8℃/s的情况下,使得马氏体和贝氏体的比例适中,保证试验钢获得NM500所规定的强度和硬度。

关键词(KeyWords)： NM500;耐磨钢;动态CCT;冲击韧性;贝氏体转变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51174020,50874007);; 中央高校基本科研业务费专项资金(FRF-SD-12-010A)

作者(Author): 张国庆,王福明,庞瑞朋,李天生

DOI: 10.13289/j.issn.1009-6264.2014.08.024

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