冯爱新,吕豫文,王术新,薛伟,裴绍虎,章正刚,曹宇鹏,李峰平

• 1:温州大学机电工程学院
• 2:江苏大学机械工程学院
• 3:镇江船艇学院

摘要(Abstract)：

针对国内核电站再热双阀组阀杆表面乙炔气堆焊Co Cr W制备耐磨焊层无法满足60年服役寿命要求的问题,在阀杆材料(304不锈钢)表面激光熔覆Ni60/石墨/Mo S2复合涂层。采用X射线衍射(XRD)、扫描电镜(SEM)和显微硬度检测等技术研究了熔覆层组织结构、相组成、显微硬度。结果表明,试样C2熔覆层从底部到顶部,熔覆层晶体依次为:平面晶、胞状晶、胞-树枝状晶、柱状树枝晶、等轴树枝晶,且平均硬度最高,为990 HV0.3。随着激光功率的升高,各类熔覆层硬度的波动幅度逐渐减小,硬质相的分布也随之越来越均匀。

关键词(KeyWords)： 激光熔覆;304不锈钢;复合粉末涂层;微观组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51175237,51305050);; “高档数控机床与基础制造装备”科技重大专项(2013ZX04009031-4);; 浙江省国际科技合作专项(2013C14007);; 江苏省“六大人才高峰”A类项目;; 中俄双边2014-2015政府间科技合作项目(CR17-11)

作者(Author): 冯爱新,吕豫文,王术新,薛伟,裴绍虎,章正刚,曹宇鹏,李峰平

DOI: 10.13289/j.issn.1009-6264.2015.04.033

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