304/Q235复合板多主元高熵化焊缝的组织与性能

doi:10.13251/j.issn.0254-6051.2022.08.010

金属热处理 ›› 2022, Vol. 47 ›› Issue (8): 63-70.DOI: 10.13251/j.issn.0254-6051.2022.08.010

304/Q235复合板多主元高熵化焊缝的组织与性能

刘德佳¹, 扎学安¹, 王伟雄¹, 唐延川¹, 赵龙志¹, 徐宏明²

1.华东交通大学材料科学与工程学院, 江西南昌 330013;
2.扬州昇业机械有限公司, 江苏扬州 225000

收稿日期:2022-03-20 修回日期:2022-06-18 出版日期:2022-08-25 发布日期:2022-09-19
作者简介:刘德佳(1984—),男,副教授,博士,主要研究方向为高熵化焊接及接头的抗腐蚀性能,E-mail:ldj515@126.com。
基金资助:
国家自然科学基金(51805171);扬州市科技成果转化项目(YZ2019089)

Microstructure and properties of 304/Q235 clad plate joints with high-entropy filler metals

Liu Dejia¹, Zha Xuean¹, Wang Weixiong¹, Tang Yanchuan¹, Zhao Longzhi¹, Xu Hongming²

1. School of Materials Science and Engineering, East China Jiaotong University, Nanchang Jiangxi 330013, China;
2. Yangzhou Shengye Machinery Co., Ltd., Yangzhou Jiangsu 225000, China

Received:2022-03-20 Revised:2022-06-18 Online:2022-08-25 Published:2022-09-19

摘要/Abstract

摘要： 对304/Q235复合板进行激光填粉焊接试验,利用光学显微镜、扫描电镜、X射线衍射、材料万能试验机及电化学工作站等,对比分析了多主元高熵化CrNi₂MnTi_0.5Al_0.5焊料及Fe基焊料所得焊接接头的微观组织、物相结构、力学性能与电化学腐蚀性能,探索了焊缝填充材料对不锈钢复合板焊缝微观组织、接头性能的影响规律。结果表明,CrNi₂MnTi_0.5Al_0.5焊料焊缝区形成了FCC及Ti₃Al颗粒的双相结构,焊缝显微硬度仅为Fe基焊料焊缝区硬度的69%~75%。两种焊接接头都有较好的抗拉强度,拉伸试样都在母材区断裂。CrNi₂MnTi_0.5Al_0.5焊料焊缝区具有最佳的耐蚀性能,其腐蚀速率约为304不锈钢的41%。

关键词: 不锈钢复合板, 高熵化焊料, 微观组织, 力学性能, 耐蚀性能

Abstract: The 304/Q235 clad plate was welded by using laser deposition welding. The microstructure, phase structure, mechanical properties and electrochemical corrosion resistance of the welded joints by using high-entropy filler metal of CrNi₂MnTi_0.5Al_0.5 and Fe-based filler metal, respectively, were compared and analyzed by means of optical microscope, scanning electron microscope, X-ray diffraction, material universal testing machine and electrochemical corrosion measurement system. The effect of filler metal on microstructure and properties of the stainless steel clad plate joints was explored. The results indicate that dual phase structure of FCC+Ti₃Al particles is formed in the weld zone with the CrNi₂MnTi_0.5Al_0.5 filer metals. Hardness value of the weld zone is only 69%-75% of that with the Fe-based filler metals. Two welded joints have good tensile strength, and both are fractured in the base metal. The weld zone with CrNi₂MnTi_0.5Al_0.5 filler metal has the best corrosion resistance, and its corrosion rate is 41% of the 304 stainless steel.

Key words: stainless steel clad plate, high-entropy filler metal, microstructure, mechanical properties, corrosion resistance

中图分类号:

TG441.2

刘德佳, 扎学安, 王伟雄, 唐延川, 赵龙志, 徐宏明. 304/Q235复合板多主元高熵化焊缝的组织与性能[J]. 金属热处理, 2022, 47(8): 63-70.

Liu Dejia, Zha Xuean, Wang Weixiong, Tang Yanchuan, Zhao Longzhi, Xu Hongming. Microstructure and properties of 304/Q235 clad plate joints with high-entropy filler metals[J]. Heat Treatment of Metals, 2022, 47(8): 63-70.

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304/Q235复合板多主元高熵化焊缝的组织与性能

Microstructure and properties of 304/Q235 clad plate joints with high-entropy filler metals

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