Evaluation of welding electrodes with hard particles addition

• Main Authors: Chia-Hung Lin, 林家宏
• Other Authors: Ta-Lun Sung
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/83698236824327393209

碩士 === 龍華科技大學 === 工程技術研究所 === 96 === The used cutter chip of the lathe and milling machines were mixed with metal alloys as the material of welding electrodes. 17different welding electrodes samples with different compositions are categorized into two types: mixed and filled. JIS Z 3114 “weld metal for method of hardness test” was used as the testing method for arc welding for local reinforcement of material surface. We have investigated the metallographiy of the samples by OM and SEM, the composition of the samples by EDX, and the hardness of the samples by the Vickers hardness measurement. The results indicated that arc welding has increased the hardness of the surface at least twice of the hardness of base material which was HV170. The hardness and composition of the cladding layer were affected by the composition and particles in the welding electrodes. The best hardness results of the cladding were arc welding with welding electrode by adding cermet and hard metal particles.