激光熔覆再制造镍基合金层的组织和性能研究
Research on microstructure and properties of Ni-based alloy layer for laser cladding remanufacturing
钱绍祥 1仇莺璇2
作者信息
- 1. 镇江市高等专科学校 现代装备制造学院,江苏 镇江 212028
- 2. 江苏科技大学 粮食学院,江苏 镇江 212028
- 折叠
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 bond-ing 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.
关键词
激光熔覆/再制造/多层/镍基合金/微观组织Key words
laser cladding/remanufacturing/multi-layer/Ni-based alloy/microstructure引用本文复制引用
基金项目
江苏省高等学校哲学社会科学研究一般项目(2022)(2022SJYB2297)
江苏省"青蓝工程"人才项目(2022)()
镇江市高等专科学校校级党建与思想政治教育专项(2021)(GZDJSZ202113)
镇江市高等专科学校校级教学改革重点项目(2023)(2023ZD05)
出版年
2024
NETL
NSTL
万方数据