Analysis of welding defects on surface of 16Mn chain
CHEN Haishan1, CHEN Changhua1, SHI Feiyang2, WANG Pengfei1
1. Technology Center,Nanjing Develop Advanced Manufacturing Co.,Ltd.,Nanjing 210048,China; 2. School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan 243002, China
Abstract：The forging factory found a surface peeling defect on one of the newly purchased 16Mn chains during the crane use inspection. In order to identify the cause, the magnetic particle testing was conducted on the circumferential surface of this chain, and no surface cracks were found. Subsequently, the 16Mn chain was dissected and sampled for metallographic microscopic examination, scanning electron microscopy, and chemical composition analysis. The results indicated that the surface peeling defect of 16Mn chain was a weld defect formed by gaps, holes, and cracks during the high-temperature welding process. This defect was related to the chemical composition of the material and the unreasonable control of welding process parameters.
2023, Vol. 41 
