30CrMnSiA钢激光堆焊修复研究  

Research on Repairing of 30CrMnSiA Steel with Laser Surfacing Process

作　　者：朱兆祺 陈卓[1] 汪宏斌 ZHU Zhaoqi;CHEN Zhuo;WANG Hongbin(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;School of Materials,Shanghai Dianji University,Shanghai 201306,China;Shanghai Ocean HighEnd Equipment Functional Platform Limited Company,Shanghai 201306,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]上海电机学院材料学院,上海201306 [3]上海海洋高端装备功能型平台有限公司,上海201306

出　　处：《上海金属》2024年第6期65-70,共6页Shanghai Metals

基　　金：《大型薄壁筒体类合金等温锻件近净成形工艺技术研究》项目(2021-cyxt1-kj27)。

摘　　要：采用正交试验对激光焊接工艺进行优化,随后采用不同焊丝对线切割预制深度为1.2 mm缺陷的30CrMnSiA钢疲劳试样进行激光堆焊修复。采用扫描电子显微镜和疲劳试验机检测了修复后的疲劳试样疲劳性能及其断口特征。结果表明:正交试验获得的最佳激光堆焊修复工艺参数为激光功率3.4 kW、扫描速度1.2 m/min和送丝速度3.0 m/min;以440 MPa的应力水平旋转弯曲疲劳试验时,采用GH3030合金焊丝激光堆焊修复的疲劳试样的循环次数大于10~6,大于采用其他两种焊丝修复的疲劳试样的循环次数,与30CrMnSiA钢疲劳试样的循环次数相近,说明GH3030合金焊丝最适用于激光堆焊修复30CrMnSiA钢。Laser surfacing process was optimized by a orthogonal test,and then the 30CrMnSiA steel fatigue samples in which a type of defect measuring 1.2 mm deep was prefabricated by wire cutting were repaired by laser surfacing with different welding wires.The fatigue property and characteristic of fatigue fracture of the repaired fatigue specimens were detected with the use of scanning electron microscope and fatigue testing machine.The results indicated that(a)the optimal parameters of laser surfacing process reserved for repairing obtained from the orthogonal test were laser power of 3.4 kW,scanning speed of 1.2 m/min,and wire feed speed of 3.0 m/min;(b)in the case of the rotating bending fatigue test being performed at a stress level of 440 MPa,the cycle life of the fatigue sample repaired by the laser surfacing with GH3030 alloy welding wire was more than 10~6 which was larger than that of the fatigue sample repaired with the other two welding wires,and similar to that of the 30CrMnSiA steel fatigue sample,indicating that GH3030 alloy welding wire was the most suitable for repair of 30CrMnSiA steel by laser surfacing.

关 键 词：激光堆焊 30CRMNSIA钢 正交试验 疲劳性能 

分 类 号：TG456.7[金属学及工艺—焊接]