厚大复杂高锰钢铸件裂纹成因及改善建议  

Causes of Cracks in Thick and Complex High Manganese Steel Casting and Suggestions for Improvement

作　　者：陈席国 舒慧建 姜文雍 CHEN Xi-guo;SHU Hui-jian;JIANG Wen-yong(School of Mechanic&Electronic Engineering,Quzhou Polytechnic College,Quzhou Zhejiang 324000,China;Zhejiang Kaishan Heavy Industry Co.,Ltd.,Quzhou Zhejiang 324000,China;School of Mechanical Engineering,Hefei University of Technology,Hefei Anhui 230009,China)

机构地区：[1]衢州职业技术学院机电工程学院,浙江衢州324000 [2]浙江开山重工股份有限公司,浙江衢州324000 [3]合肥工业大学机械工程学院,安徽合肥230009

出　　处：《铸造设备与工艺》2024年第4期46-50,56,共6页Foundry Equipment & Technology

基　　金：衢州市科技局指导性项目(2023009).

摘　　要：以某厂成品ZGMn13高锰钢铸件为研究对象,分析了厚大复杂高锰钢铸件微观裂纹形成机理。通过分析高锰钢成分偏析计算相图,金相显微镜和扫描电镜(SEM)观察,发现微观裂纹沿晶界分布,并且在裂纹周围富集大量的夹化物、碳化物和低熔点磷共晶。铸件凝固过程中的拉应力使得微观裂纹在这些氧化物、碳化物和低熔点磷共晶处萌生。因此,凝固过程中的拉应力及这些夹杂物的存在是厚大复杂高锰钢铸件形成微观裂纹的主要原因。The formation mechanism of the micro-cracks produced in thick and complex high manganese steel castings were studied.Results show that the micro-cracks were distributed along the grain boundaries,and a large number of inclusions,carbides and low melting point phosphorus eutectics were enriched around the cracks by metallographic microscope and the scanning electronic microscope(SEM).The tensile stress during the solidification process of the casting causes micro-cracks to initiate at these oxides,carbides and low-melting point phosphide eutectics.Therefore,the tensile stress during solidification and the existence of these inclusions are the main reasons for the formation of micro cracks in thick and complex high manganese steel castings.

关 键 词：高锰钢 裂纹 磷共晶 

分 类 号：TG244[金属学及工艺—铸造]