摘要
为了探索ASPEX检测法与旋弯疲劳试验法的最佳适用条件,全面了解轴承钢中夹杂物的信息,对真空脱气冶金工艺制备的GCr15轴承钢分别应用上述两种方法对试验钢中夹杂物进行了类型、形状、尺寸、分布方面的表征。结果表明,在夹杂物类型检测方面,两种检测方法结果基本一致。该轴承钢中富含钙、铝、硫等元素的球型复合夹杂物,同时也存在少部分边缘锋利的TiN型夹杂物;利用ASPEX进行多面多次扫描,发现检测出的最大球型B类氧化铝夹杂物大小分布结果基本与旋弯疲劳法符合。根据试验结果以及两种检测方法的原理得出,ASPEX法对钢中夹杂物的尺寸、形状、类型、分布等信息的整体分析更为有效,而应用疲劳法对大尺寸刚性夹杂物的检测更为有利。
In order to explore the best application conditions of those two methods and understand the information of inclusions in bearing steel the ASPEX test and rotating-bending fatigue test of GCr15 bearing steel under vacuum degassing process was investigated.The information of the inclusions including type,shape,size and distribution was analyzed.It was found that using these two methods the inclusion types were found almost same with the spherical inclusions in the GCr15 were rich in Ca,Al and S,and also a small number of sharp TiN inclusions with sharp edges.Using ASPEX for multi-faceted multiple scanning,it was found that the distribution of the maximum size spheroidal B-type alumina inclusions was basically in accord with the result of the rotating-bending fatigue test.According to the test results and the principle of two detection methods,the ASPEX method is more effective for the overall analysis of inclusions in steel,such as inclusion size,shape,type,distribution,etc,meanwhile the application of fatigue method is more advantageous for the detection of large-sized rigid inclusions.
作者
史智越
徐海峰
许达
俞峰
王昌
曹文全
SHI Zhi-yue;XU Hai-feng;XU Da;YU Feng;WANG Chang;CAO Wen-quan(Institute of Special Steels,Central Iron and Steel Research Institute,Beijing 100081,China;Center Laboratory,Central Iron and Steel Research Institute,Beijing 100081,China)
出处
《钢铁》
CAS
CSCD
北大核心
2019年第4期55-62,共8页
Iron and Steel
基金
国家重点研发计划资助项目(2016YFB0300101)
北京市自然科学基金资助项目(2182088)
