激光与光电子学进展, 2012, 49 (6): 061404, 网络出版: 2012-05-04
激光熔覆钴基合金与碳化钒的功能梯度层
Functionally Gradient Material Coating of Co-Based Alloy and VC Using Laser Cladding
材料 激光熔覆 钴基合金 碳化钒 裂纹敏感性 显微镜结构 materials laser cladding Co-based alloy vanadium carbide crack sensitivity microstructure
摘要
采用光纤激光器和同轴送粉系统在SUS304不锈钢表面制备出钴基合金(Stellite-6)与碳化钒(VC)混合粉末的激光熔覆层。试验中分别采用每层成分不变的多层熔覆工艺(普通熔覆工艺)和每层成分变化的功能梯度熔覆工艺，对比研究了两种熔覆工艺方法的熔覆层裂纹敏感性、组织特征和性能。结果表明，功能梯度熔覆层与普通熔覆层相比较，在成分、组织和性能基本相同的情况下，裂纹敏感性低，能有效地防止裂纹出现；另外，Stellite-6与VC混合合金粉末熔覆层的显微组织根据VC含量的不同，可以分为亚共晶组织和过共晶组织。
Abstract
The mixed powders of Co-based alloy (stellite-6) and vanadium carbide (VC) are deposited on SUS304 stainless steel using fiber laser and coaxial laser cladding head. The two methods with a constant chemical composition multi-layer cladding and a functionally gradient material multi-layer cladding are investigated comparatively. The results show that the microstructures of the clad layer with the mixed powder of stellite-6 and VC can be classified into hypoeutectic structure and hypereutectic structure according to the concentration of VC; the functionally gradient material multi-layer cladding is an effective method to decrease the crack sensitivity.
徐国建, 殷德洋, 杭争翔, 唱丽丽, 范荣博, 张翼飞. 激光熔覆钴基合金与碳化钒的功能梯度层[J]. 激光与光电子学进展, 2012, 49(6): 061404. Xu Guojian, Yin Deyang, Hang Zhengxiang, Chang Lili, Fan Rongbo, Zhang Yifei. Functionally Gradient Material Coating of Co-Based Alloy and VC Using Laser Cladding[J]. Laser & Optoelectronics Progress, 2012, 49(6): 061404.
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