李俊琛,张亚森,杨新龙,冯瑞

• 1:兰州理工大学材料科学与工程学院
• 2:兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
• 3:酒泉钢铁(集团)有限责任公司

摘要(Abstract)：

通过拉伸实验、硬度试验、冲击试验和组织观察研究热输入对高钼Q420钢CO2气体保护焊焊接接头组织与性能的影响,借助Image Pro-Plus 6.0软件测量了焊缝中先共析铁素体、侧板条铁素体和针状铁素体的体积分数比例。结果表明:随着焊接热输入的增加,先共析铁素体和侧板条铁素体组织的含量均逐渐减少,针状铁素体逐渐增加;当焊接热输入为11.68 k J·cm-1时,针状铁素体体积分数达到最大值81.31%。随着针状铁素体体积分数的增加,焊缝金属的低温冲击韧性增加。

关键词(KeyWords)： 高钼Q420钢;焊接热输入;焊缝组织;性能

Abstract:

Keywords:

基金项目(Foundation): 甘肃省科技计划(创新基地和人才计划)(17JR5RA131);甘肃省科技计划(科技重大专项)(17ZD2GB012)

作者(Author): 李俊琛,张亚森,杨新龙,冯瑞

DOI: 10.13289/j.issn.1009-6264.2018-0128

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