李虎,王作成,薛长深,庄栋栋,王晓,张思勋

• 1:山东大学材料液固结构演变与加工教育部重点实验室
• 2:山东大学材料科学与工程学院
• 3:莱芜钢铁股份有限公司

摘要(Abstract)：

为了研究钢中合金元素Nb、B、Ni对低合金高强度H型钢抗层状撕裂能力(Z向性能)的影响,设计了对照试验,通过常温下拉力试验,对其力学性能尤其是断面收缩率进行了测试,使用XRD、SEM、TEM以及EDS对其组织和成分进行了分析。结果表明:微合金元素Nb、B和微量元素Ni对钢材的Z向性能产生了明显的不良影响,含有Nb、B和Ni,经过钢包精炼的Q345E钢的Z向性能显著低于不含Nb、B和Ni,未经钢包精炼且含有较多夹杂物的Q345B钢。其原因主要在于Nb、B、Ni的存在阻碍了钢材变形过程中位错在晶界和晶内的移动。

关键词(KeyWords)： 低合金高强度钢;Z向性能;合金元素;夹杂物;阻碍位错

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李虎,王作成,薛长深,庄栋栋,王晓,张思勋

DOI: 10.13289/j.issn.1009-6264.2013.02.013

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