激光与光电子学进展, 2015, 52 (3): 031401, 网络出版: 2015-02-05
激光光斑直径对熔覆层裂纹的影响 下载: 504次
Influence of Laser Spot Diameter on Cladding Layer Cracking
摘要
通过理论推导分析了激光熔覆过程中熔覆层裂纹形成的物理机制,研究了激光光斑直径对裂纹缺陷的影响。选择40Cr 为基底材料,Ni60 为熔覆粉末进行了激光熔覆实验,获取了不同光斑直径下的熔覆效果图,并对裂纹分布特性进行了分析。理论与实验结果表明,随着激光光斑直径的增大,熔覆层的裂纹率逐渐增加,裂纹的深度逐渐加深,裂纹的宽度也随之加大。
Abstract
The physical mechanism of crack formation in the process of laser cladding is analysed by theoretical derivation and the influence of laser spot diameter on crack defect is researched. The powder of Ni60 is cladded on the surface of base material (40Cr) by experiment and the characteristic of crack is analysed by observing the distributions of crack with optical microscope. The results show that the crack ratio of laser cladding layer is increasing gradually with the increase of spot diameter, in addition, the depth and width of crack are increasing obviously.
付福兴, 畅庚榕, 赵小侠, 张艳丽. 激光光斑直径对熔覆层裂纹的影响[J]. 激光与光电子学进展, 2015, 52(3): 031401. Fu Fuxing, Chang Gengrong, Zhao Xiaoxia, Zhang Yanli. Influence of Laser Spot Diameter on Cladding Layer Cracking[J]. Laser & Optoelectronics Progress, 2015, 52(3): 031401.