初雅杰,夏浩,李晓泉,朱宇,许欣童,何秀男

• 1:南京工程学院材料工程学院
• 2:江苏省先进结构材料与应用技术重点实验室
• 3:江苏双勤民生冶化设备制造有限公司

摘要(Abstract)：

研究了焊后热处理时间对Q235钢表面等离子堆焊的钴基合金熔敷层的显微组织和耐腐蚀性能的影响。采用光学显微镜和扫描电镜对熔敷层组织形貌进行观察和分析,采用电化学工作站对熔敷层在3.5%NaCl溶液中的耐腐蚀性进行了研究。结果表明:随着热处理时间的延长,熔敷层与基体界面处元素扩散充分,浓度梯度减小,熔覆层内枝晶不断长大,点蚀击破电位随着时间的延长先升高后降低,5 h击破电位E_b最低,(E_b-E_(pr))值最小。虽然热处理时间的延长没有提高熔覆层的点蚀击破电位,但是保护电位的升高使其综合耐腐蚀性能最好。

关键词(KeyWords)： 等离子熔敷;钴基合金;电化学;显微组织

Abstract:

Keywords:

基金项目(Foundation): 江苏省先进结构材料与应用技术重点实验室开放基金(ASMA201610);; 江苏省产业前瞻与共性关键技术资助项目(BE2017168)

作者(Author): 初雅杰,夏浩,李晓泉,朱宇,许欣童,何秀男

DOI: 10.13289/j.issn.1009-6264.2018-0295

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