文献类型：期刊文献

英文题名：Microstructure evolution mechanism of single and multi-pass in laser cladding based on heat accumulation effect for invar alloy

作者：Zhu, Shichao Yu, Chenxiao Chang, Zhen Zhan, Xiaohong Zeng, Chao

第一作者：Zhu, Shichao

通信作者：Zhu, SC[1];Zhan, XH[2]

机构：[1]Changzhou Inst Technol, Coll Aeronaut & Mech Engn, Changzhou 213002, Peoples R China;[2]Anhui Univ Technol, Coll Met Engn, Maanshan 243032, Peoples R China;[3]Hangzhou Bearing Test & Res Ctr Co Ltd, Hangzhou 310022, Peoples R China;[4]Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211106, Peoples R China;[5]Guizhou Inst Technol, Coll Aerosp Engn, Guiyang 550003, Peoples R China

第一机构：Changzhou Inst Technol, Coll Aeronaut & Mech Engn, Changzhou 213002, Peoples R China

通信机构：corresponding author), Changzhou Inst Technol, Coll Aeronaut & Mech Engn, Changzhou 213002, Peoples R China;corresponding author), Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211106, Peoples R China.

年份：2021

卷号：117

期号：11-12

起止页码：3447-3463

外文期刊名：INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

收录：;EI(收录号：20213510834432);Scopus(收录号：2-s2.0-85113761406);WOS:【SCI-EXPANDED(收录号:WOS:000690821100002)】；

基金：The authors gratefully acknowledge the State Key Laboratory of Additive Manufacturing, China Academy of Engineering Physics (Granted No. ZM17002), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Granted No. 19KJA430005), and the Guizhou Provincial Science and Technology Foundation Grant (Granted No. 20191415).

语种：英文

外文关键词：Laser cladding; Invar alloy; Microstructure evolution mechanism; Heat accumulation effect

摘要：This work explores how the process parameters in laser cladding affect the evolution of the microstructure of the single-pass and multi-pass cladding layers of Invar alloys. The research examined the cladding layers from three aspects: (1) the transformation of grain size, heat-affected zone (HAZ) width, ratio of the columnar crystal to the equiaxed crystal, and change of Fe content of the cladding layer; (2) the effects of heat accumulation on grain size, HAZ width, and remelting zone; and (3) the hardness distribution of single-pass and multi-pass cladding layers. The investigation has the following four findings: (1) the cladding layer is composed of equiaxed crystals at the top and columnar crystals at the bottom of the cladding layer; (2) the processing parameters have significant effects on the width of the HAZ, proportion between the columnar and equiaxed crystals, and the change of Fe content of the cladding layer; (3) the gradual accumulation of heat causes the increase in HAZ width, the grain size, and the area of the remelting zone; and (4) the hardness progressively reduces from the top to the bottom along the direction of the centerline of the cladding layer.