铸造高锰钢平衡块断裂机理及改善分析  

Analysis of Fracture Mechanism and Improvement of Cast High-manganese Steel Balance

作　　者：李子阳 朱伟恒[2] LI Ziyang;ZHU Weiheng(R&D Center,Electromechanical Division of Midea Group,Foshan 528333,China;School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]美的集团机电事业部研发中心,广东佛山528333 [2]华南理工大学材料科学与工程学院,广东广州510641

出　　处：《铸造技术》2021年第1期8-11,共4页Foundry Technology

摘　　要：从组织、成分、硬度及断口形貌研究了铸造高锰钢平衡块断裂失效原因和机理,并对高锰钢平衡块质量提高的方向进行了探讨。结果表明,开裂平衡块材料的化学成分和表面硬度正常,心部硬度异常偏大且金相组织粗大,失效形式为韧性和脆性混合断裂机制,且断口处存在明显组织疏松和富锰组织偏析。降低冷却速度和有害氧化物含量,平衡块无铆接开裂现象。The fracture failure causes and mechanisms of high manganese steel balance blocks casting were studied by analyzing the microstructure,composition,hardness and fracture morphology,and improve the quality of high manganese steel counterweight direction are discussed in this paper.The results show that the chemical composition and surface hardness of the cracked balance block are normal,the core hardness is abnormally large and the microstructure is coarse,the failure form is the mixed fracture mechanism of toughness and brittleness,and obvious shrinkage loose and manganese rich microstructure segregation are observed in the fracture surface.Reduce the cooling rate and harmful oxide content,no riveting cracking of the balance block.

关 键 词：高锰钢 平衡块 铸造缺陷 失效分析 

分 类 号：TG115[金属学及工艺—物理冶金]