H13热作模具钢表面点蚀分析  

Pitting Corrosion on H13 Hot Work Die Steel Surface

作　　者：周健[1] 马党参[1] 朱娇[2] 秋立鹏 陈再枝[1] 李向阳[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081 [2]云南大学物理科学技术学院,云南昆明650091 [3]东北特钢集团有限责任公司技术中心,辽宁抚顺113001

出　　处：《物理测试》2013年第1期5-10,共6页Physics Examination and Testing

摘　　要：在H13热作模具的加工过程中发现表面产生点状缺陷,对点状缺陷进行了测试分析,利用FeCl3溶液浸渍的方法加速H13钢表面的腐蚀速度,以观察H13钢的表面在Cl-的作用下的腐蚀起源。结果表明:H13钢表面的点状缺陷是点蚀,点蚀坑中的腐蚀产物含有O、Cl等成分;第二相质点(如Mo6C碳化物)、Al2O3夹杂物及共晶碳化物等与基体的界面都可能成为点蚀的起源;该点蚀坑的形成可能与模具存放过程中的局部环境等因素有关。Pitting defect has been found on the surface of H13 hot work die steel during manufacturing.The defect was investigated in this study,and the initial position of corrosion induced by chloride ions was inspected by the acceleration test of soaking process in FeCl3 solution.The results show that the pitting defect on the surface was of pitting corrosion,and the corrosion product consisted of O and Cl.The initiation of pitting corrosion may take place on the interface of matrix with the second phase particles（such as Mo6C carbides）,Al2O3 inclusion,eutectic carbides and so on.The formation of this kind of pitting corrosion may be associated with the local pit environment during the storage of the mold.

关 键 词：H13钢 点蚀 共晶碳化物 非金属夹杂 

分 类 号：TG142.15[一般工业技术—材料科学与工程]