Qian Shaoxiang*,Qiu Yingxuan.Research on microstructure and properties of Ni-based alloy layer for laser cladding remanufacturing?/html>[J].Plating & Finishing,2024,(7):69-75.[doi:10.3969/j.issn.1001-3849.2024.07.011]
激光熔覆再制造镍基合金层的组织和性能研究
- Title:
- Research on microstructure and properties of Ni-based alloy layer for laser cladding remanufacturing?/html>
- Keywords:
- laser cladding ; remanufacturing ; multi-layer ; Ni-based alloy ; microstructure
- 分类号:
- TG174.44
- 文献标志码:
- A
- 摘要:
- 采用激光熔覆再制造技术在 316L 基材上开展多层镍基合金梯形槽试验研究，分析了修复区的物相组成和显微组织结构，研究了修复区的组织变化对熔覆层的显微硬度和耐腐蚀性能的影响。结果表明，修复区与基材呈现良好的冶金结合，其结合区的组织主要为胞状晶和柱状晶，熔覆层内的组织主要为柱状晶和等轴晶；晶粒内部具有较高的位错密度且以小角度晶界为主；修复区的平均显微硬度约为基材平均显微硬度的 2.23 倍；相较于基材，修复区具有更好的耐腐蚀性能。
- Abstract:
- ： Experimental research was done about multi-layer Ni-based alloy trapezoidal groove using laser cladding remanufacturing technology ， the phase composition and microstructure of repaired zone were analyzed ， and the effects of microhardness and corrosion resistance of the cladding layer were studied about structural changes in the repaired zone. The results showed that good metallurgical bonding was obtained between the repaired zone and the substrate ， the structure of its bonding zone was mainly composed of columnar and cellular crystals ， the microstructure inside the cladding layer was mainly composed of columnar and equiaxed crystals ， the high dislocation density was found ， and it was mainly composed of small angle grain boundaries in the grains ， the average microhardness of the repaired zone was approximately 2.23 times that of the substrate ， compared to the substrate ， the repaired zone had better corrosion resistance.
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备注/Memo
收稿日期： 2023-08-10 修回日期： 2023-09-08 作者简介： 钱绍祥，男，（ 1977 —），男，博士，副教授， email ： qiansx@zjc.edu.cn 基金项目： 2022 年江苏省高校哲学社会科学研究一般项目（ 2022SJYB2297 ）； 2022 年江苏省“青蓝工程”人才项目； 2021 年镇江市高等专科学校校级党建与思想政治教育专项课题（ GZDJSZ202113 ）； 2023 年镇江市高等专科学校校级教学改革重点项目（ 2023ZD05 ）?/html>