BHW35钢用埋弧焊焊丝优化研究
唐国军
（东方电气集团 东方锅炉股份有限公司，四川 自贡 643001）
摘要：BHW35钢作为优质的厚壁容器材料被广泛使用，其进行埋弧焊焊接时通常采用H10Mn2NiMoA焊丝，但采用该焊丝进行双丝埋弧焊时有较为明显的再热裂纹倾向。通过理论分析及统计前期试验数据，认为再热裂纹率较高的原因与使用的焊丝熔敷金属强度过高有关，有必要对现用的焊丝成分进行优化。用H08Mn2MoA焊丝进行了焊接工艺试验，并检测了接头的熔敷金属化学成分、常温及中温抗拉强度及冲击韧性。通过对H08Mn2MoA焊丝熔敷金属相关试验数据与BHW35材料性能指标的对比分析，得出了合理的焊丝优化方案。
关键词：BHW35钢；埋弧焊；再热裂纹；焊丝
中图分类号：TG422.3 文献标志码：A doi：10.3969/j.issn.1006-0316.2018.07.016
文章编号：1006－0316 (2018) 07－0068－04
Composition Optimization Research on Submerged Arc Welding Wire of BHW35 Steel
TANG Guojun
( Dongfang Boiler Group Co., Ltd., Dongfang Electric Corporation, Zigong 643001, China )
Abstract：As a high quality material, the BHW35 steel is widely used in Thick-walled vessel. Gengrally, The mached submerged arc welding wire is H10Mn2NiMoA, but there is significant reheat cracking tendency while welding BHW35 steel by double wires submerged arc welding with H10Mn2NiMoA wire. By analyzing the test data and the mechanism of reheat crack, it is considered that the high reheat crack rate is related to the too high tensile strength of deposited metal, therefore, it is necessary to optimize the composition of wire. A welding procedure test with H08Mn2MoA wire on BHW35 steel is performed, and the chemical composition, room temperature and medium temperature tensile strength, impact toughness of deposited metal are measured. By comparative analyzing the test data of the welding procedure and the performance requirements of the BHW35 steel, a reasonable theoretical optimization scheme is achieved.
Key words：BHW35 steel；submerged arc welding；reheat crack；wire
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收稿日期：2017－11－14
作者简介：唐国军（1982－），男，湖南永州人，本科，高级工程师，主要从事民用核电产品及常规压力容器类产品焊接工艺研发工作。
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