应用激光, 2015, 35 (1): 48, 网络出版: 2015-03-23
激光成形修复30CrMnSiNi2A超高强度钢组织与力学性能研究
Study on Microstructure and Mechanical Properties of 30CrMnSiNi2A Super-Strength Steel by Laser Forming Repair
激光成形修复 30CrMnSiNi2A超高强度钢 微观组织 冲击韧性 耐磨性能 laser forming repair 30CrMnSiNi2A super-strength steel microstructure impact toughness abrasion resistance
摘要
研究了激光成形修复30CrMnSiNi2A超高强度钢的微观组织及力学性能。结果表明: 激光修复区(LRZ)与锻件基材实现良好冶金结合。修复区主要为板条马氏体和回火马氏体, 热影响区(HAZ)受激光淬火形成细小马氏体板条。硬度从修复区向基体区(SZ)整体呈下降趋势, 在热影响区内出现硬度峰值(58 HRC)。激光修复试样冲击韧性为33~34 J/cm2, 低于同批锻件基材, 失效方式为准解理断裂。激光修复区耐磨性与基体区相当, 磨损方式主要为磨粒磨损。
Abstract
Microstructure and mechanical properties of 30CrMnSiNi2A super-strength steel by laser forming repair have been investigated. A good metallurgical bond between laser repaired zone(LRZ)and the forged substrate was achieved. The microstructure of the repaired zone is composed of lath marten site and tempered marten site, and fine lath marten site formed in heat affected zone(HAZ)because of laser quenching. Rockwell hardness values decreased from LRZ to substrate zone(SZ)from the whole, and the maximum value (58 HRC) happened in the HAZ. The impact toughness of laser repaired samples(33~34 J/cm2)was below to that of assigned forging samples, and their failure mode were quasi-cleavage fracture. Abrasion resistance of LRZ samples was equivalent to that of SZ samples, and their abrasion mode was grain-abrasion.
赵卫强, 杨肖琨, 薛蕾, 赵晓明, 王俊伟. 激光成形修复30CrMnSiNi2A超高强度钢组织与力学性能研究[J]. 应用激光, 2015, 35(1): 48. Zhao Weiqiang, Yang Xiaokun, Xue Lei, Zhao Xiaoming, Wang Junwei. Study on Microstructure and Mechanical Properties of 30CrMnSiNi2A Super-Strength Steel by Laser Forming Repair[J]. APPLIED LASER, 2015, 35(1): 48.