张家文,付天亮,吴昊,顾小阳,王昭东

• 1:东北大学轧制技术及连轧自动化国家重点实验室
• 2:南京钢铁股份有限公司

摘要(Abstract)：

研究了控温淬火新工艺对Q960E超高强工程机械用钢板组织性能的影响,测量了其静态CCT曲线,并与常规淬火+回火工艺进行了对比。结果表明:实验钢马氏体临界转变冷速为5℃/s,马氏体相变温度M_s、M_f分别为401℃、240℃。钢板在超快冷系统中淬火时,通过测温仪精确控制其心部温度达到M_f点以下100℃和200℃后停止淬火,钢板表面出现"返温"现象,使钢板发生自回火效应,其组织为回火板条马氏体,与常规淬火+回火组织相似,但综合力学性能更优,自回火效果良好。当终冷温度为100℃时,实验钢的综合性能最佳,屈服强度在1040 MPa以上,抗拉强度约为1350 MPa,伸长率在14%以上,-40℃冲击吸收能量大于74 J。

关键词(KeyWords)： 控温淬火;超高强钢;自回火;组织性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 张家文,付天亮,吴昊,顾小阳,王昭东

DOI: 10.13289/j.issn.1009-6264.2020-0293

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