因瓦合金钢4J36激光增材再制造工艺研究

Research on Laser Additive Remanufacturing Technology of 4J36 Invar Alloy Steel

增材再制造技术是失效部件蕴含价值重新得到开发与利用的一种有效途径。基于4J36因瓦合金钢开展相关工艺试验,解决复合材料模具的失效问题。通过研究激光功率、扫描速度以及送粉速率等修复参数,确定其对树枝晶生长方向的影响;选取激光修复的工艺参数:激光功率2200 W,扫描速度550 mm/min,送粉速率1.3 r/min,搭接率40%,熔覆区组织致密、均匀,呈现良好的冶金结合,保证了各层间的结合强度及组织生长连续性。试件经力学性能检测,满足模具性能要求,可直接投入使用。

Additional remanufacturing technology was an effective way to re-develop and utilize the implied value of failure components.Based on 4J36 invar alloy steel,relevant process tests were carried out to solve the failure problem of composite die.The effects of laser power,scanning speed and powder feeding rate on the dendrite growth direction were determined by studying the repair parameters.The technological parameters of laser repair were selected as follows:laser power 2200 W,scanning speed 550 mm/min,powder feeding rate 1.3 r/min,lapping rate 40%,it showed compact and uniform structure of cladding zone,good metallurgical bonding between layers and tissue growth continuity were ensured..The mechanical properties of the specimens were tested to meet the requirements of the die and it can be directly put into use.