李建,贾涓,郑爱琴,马玉喜,宋新莉

• 1:武汉科技大学省部共建耐火材料与冶金国家重点实验室

摘要(Abstract)：

用光学显微镜、扫描电镜和体视显微镜对HB450级耐磨钢板延迟开裂断口的宏微观形貌、夹杂物分布和显微组织进行了观察分析。结果表明,切割工艺不当导致了边缘处存在过渡带组织,在夹杂物、残余应力和外部环境的综合作用下产生裂纹并发生扩展。裂纹产生在过渡带组织内(粗大的铁素体和马氏体)的夹杂物附近,最初沿着轧面扩展,随后转到侧面上,最终在轧板厚度方向上贯穿,在断口边缘处出现台阶。

关键词(KeyWords)： HB450级耐磨钢;延迟开裂;火焰切割

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划“重点基础材料技术提升与产业化”重点专项“煤炭采运用高耐磨性钢板及应用”(2017YFB0305100)

作者(Author): 李建,贾涓,郑爱琴,马玉喜,宋新莉

DOI: 10.13289/j.issn.1009-6264.2017-0355

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