铸造技术2024，Vol.45Issue(6)：574-584,11.DOI:10.16410/j.issn1000-8365.2024.4036
激光熔化沉积H13钢微观组织及力学性能研究
Study of the Microstructure and Mechanical Properties on Laser Melting Deposition H13 Steel
摘要
Abstract
Laser melting deposition technology has tremendous application prospects in the mold repair industry,and determining how the microstructure and mechanical properties of deposited parts vary with respect to the laser parameters is highly important for selecting the optimal mold repair process window.Experiments on laser melting deposition of H13 steel under different scanning speeds and laser powers were carried out,and the evolution of the microstructure and mechanical properties were analysed.The results show that as the scanning speed increases from 400 mm/min to 600 mm/min,the amount of fine martensite increases,the hardness of the deposited layer increases by approximately 3%,the plasticity decreases by approximately 1%,and the strength increases and then decreases.An increase in the number of defects leads to a decrease in the bonding strength with the substrate by approximately 20%.With increasing laser power from 1 800 W to 2 200 W,the size of the martensite increases,while the martensite content decreases.The hardness of the deposited layer decreases by approximately 5%,and the strength and plasticity increase by approximately 34%and 2%,respectively.At the same time,a decrease in the number of defects leads to an increase in the bond strength of approximately 58%.关键词
H13钢/激光熔化沉积/微观组织/力学性能Key words
H13 steel/laser melting deposition/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
高军民,侯小华,王果,梁华耀,赵海东..激光熔化沉积H13钢微观组织及力学性能研究[J].铸造技术,2024,45(6):574-584,11.基金项目
广东省重点研发计划(2020B010184002) （2020B010184002）
