Ni对金属粉芯型焊丝接头性能的影响
第４０卷第6期２０１８年１１月
沈一阳一工一业一大一学一学一报Journal of Shenyang University of Technology Vo l ．４０No ．6Nov ．２０１８收稿日期：２０１７－０９－０１.
基金项目：国家重点研发计划项目（２０１７YFB １１０３6０３).
作者简介：刘政军（１９6２－)，男，黑龙江纳河人，教授，博士生导师，主要从事焊接冶金二特种焊接材料及表面强化等方面的研究.*本文已于２０１８－０７－０２１０?４０在中国知网优先数字出版.网络出版地址：http ：?https://www.wendangku.net/doc/f06614032.html, /kcms /detail /２１.１１８９.T.２０１８０6２８.１6１７.００４.html 一 材料科学与工程一doi ：１０.７6８８/j.issn.１０００－１6４6.２０１８.０6.０6
Ni 对金属粉芯型焊丝接头性能的影响*
刘政军１,裘荣鹏１,张天珺２,武一丹１,苏允海１
（１．沈阳工业大学材料科学与工程学院，沈阳１１０８７０;２．哈尔滨锅炉厂有限责任公司质量检验处，哈尔滨１５００４6)
摘一要:为了制备WQ ９6０高强钢焊接所需的药芯焊丝，自行研制了Mn-Mo-Cr 系金属粉芯型药芯焊
丝，并在药芯中添加Ni 粉来改善焊接接头的冲击韧性.利用拉伸试验二硬度试验和冲击试验等测试
方法研究了Ni 元素对焊接接头力学性能的影响.结合组织观察和化学成分分析方法，从组织结构的
角度对Ni 元素的影响机理进行了合理解释.结果表明，随着焊缝中Ni 含量的增加，焊接接头的抗拉
强度增大，但伸长率减小.当温度为－6０~２５?时，焊缝冲击功呈现先增大后降低的趋势.随着Ni 含
量的增加，焊缝及热影响区硬度增大，焊缝最高硬度值为３２９．５HV ，热影响区软化现象有所缓解.焊
缝金属中加入适量的Ni 元素具有提高焊接接头冲击功的作用，且最佳Ni 含量为１．２２%.
关一键一词:Ni 元素;WQ ９6０高强钢;金属粉芯型药芯焊丝;力学性能;抗拉强度;冲击功;伸
长率;针状铁素体
中图分类号:TG ４２２．３一一一文献标志码:A 一一一文章编号:１０００－１6４6（２０１８)０6－０6３２－０５
Effect of Ni on properties of welded joint prepared with metal powder flux cored wire
LIU Zheng-jun １，QIU Rong-peng １，ZHANG Tian-jun ２，WU Dan １，SU Yun-hai １
（１.School of Materials Science and Engineering ，Shenyang University of Technology ，Shenyang １１０８７０，China ;２.Quality Examination Department ，Harbin Boiler Company Limited ，Harbin １５００４6，China )Abstract ：In order to fabricate the flux cored wire required in welding the WQ ９6０high strength steel ，the Mn-Mo-Cr system metal powder flux cored wire was self-developed ，and the Ni powder was added into the flux core to improve the impact toughness of welded joint.The effect of Ni element on the mechanical properties of welded joint was studied through performing the tensile test ，hardness test and impact https://www.wendangku.net/doc/f06614032.html,bined with both microstructure observation and chemical composition analysis ，the effect mechanism was reasonably explained from the perspective of microstructure.The results show that with increasing the Ni content in the weld line ，the ultimate tensile strength of welded joint increases ，but the elongation decreases.When the temperature is in the range from －6０?to ２５?，the impact energy of weld line firstly increases and then decreases.With increasing the Ni content ，the hardness of both weld line and heat affect zone increases ，and the maximum hardness value of weld line is ３２９．５HV.Meanwhile ，the softening phenomenon of heat affected zone gets alleviated.It shows that the addition of suitable amount of Ni element into the weld metal plays a role of increasing the impact energy of welded joint ，and the optimum addition amount of Ni is １．２２%.
Key words ：Ni element ;WQ ９6０high strength steel ;metal powder flux cored wire ;mechanical property ;
tensile strength ;impact energy ;elongation ;acicular ferrite
沈一阳一工一业一大一学一学一报一一第４０卷万方数据