引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 43次   下载 34 本文二维码信息
码上扫一扫!
分享到: 微信 更多
不同退火条件下304L不锈钢埋弧焊接头组织及性能分析
张建晓1,2, 陈会子1, 冯伟3, 黄健康1, 樊丁1
1.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, 兰州 730050;2.兰州兰石重型装备股份有限公司, 兰州 730314;3.哈尔滨威尔焊接有限责任公司, 哈尔滨 150028
摘要:
采用埋弧焊方法,进行了304L不锈钢厚板的对接试验研究.通过对焊接接头处的组织观察,并结合焊接接头的-196 ℃冲击韧性以及不同退火条件下残余应力测试,分析了埋弧焊304L不锈钢焊接接头组织和性能. 结果表明,热影响区组织为奥氏体,焊缝区则为奥氏体与少量的铁素体的复相组织;采用残余应力盲孔释放测量方法对焊接接头进行测试,随着退火温度的升高,焊缝及热影响区的残余应力得到进一步的释放;冲击试验中,热影响区-196 ℃冲击吸收能量随退火温度的升高急剧下降,焊缝区-196 ℃冲击吸收能量则呈平稳下降趋势.
关键词:  埋弧焊  304L不锈钢  退火  残余应力  韧性
DOI:10.12073/j.hjxb.2019400233
分类号:TG445
基金项目:国家自然科学基金资助项目(51775256)
Microstructure and properties of 304L stainless steel submerged arc welding joint under different annealing conditions
ZHANG Jianxiao1,2, CHEN Huizi1, FENG Wei3, HUANG Jiangkang1, FAN Ding1
1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;2.Lanzhou LS Heavy Equipment Co., Ltd., Lanzhou 730314, China;3.Harbin Well Welding Co., Ltd., Harbin 150028, China
Abstract:
The butt joint experiment of 304L stainless steel thick plate was carried out by submerged arc welding method. The microstructure and properties of 304L stainless steel welded joint were analyzed by observing the microstructure of welded joint, combining with the impact toughness of welded joint at -196℃ and the residual stress test under different annealing conditions. The results show that the microstructure of heat affected zone is austenite, and the weld zone is austenite + a small amount of austenite. The results show that the residual stresses in weld seam and heat affected zone change greatly after annealing, and the residual stresses are further released with the increase of annealing temperature. In impact test, the impact energy of heat-affected zone at -196℃ decreases sharply with the increase of annealing temperature, and the impact work in weld zone at -196℃ decreases sharply with the increase of annealing temperature. The impact work showed a steady downward trend.
Key words:  submerged arc welding  304L stainless steel  annealing  residual stress  toughness