脱氧剂对M50NiL钢中非金属夹杂物的影响  

Effect of deoxidizer on non-metallic inclusions in M50NiL steel

作　　者：李兵[1,2] 吴志伟 陈文雄 王小强 郎东 张军 毛健 Li Bing;Wu Zhiwei;Chen Wenxiong;Wang Xiaoqiang;Lang Dong;Zhang Jun;Mao Jian(School of Materials Science and Engineering,Sichuan University,Chengdu 610065,Sichuan,China;Chengdu Advanced Metal Materials Industry Technology Research Institute Co.,Ltd.,Chengdu 610303,Sichuan,China;School of Mechanical Engineering,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]四川大学材料科学与工程学院,四川成都610065 [2]成都先进金属材料产业技术研究院股份有限公司,四川成都610303 [3]四川大学机械工程学院,四川成都610065

出　　处：《钢铁钒钛》2023年第3期177-182,共6页Iron Steel Vanadium Titanium

基　　金：四川省科技厅研发项目(高品质高温含钒轴承钢研制,编号:2022YFG0097)。

摘　　要：在航空发动机用轴承钢M50NiL的真空冶炼过程中使用不同脱氧剂进行脱氧,重点研究了不同脱氧剂类型对钢中夹杂物形貌、类型、尺寸及数量密度的影响。结果表明,未添加脱氧剂时,钢中夹杂物主要为Al_(2)O_(3)和铝镁尖晶石;使用Al-RE作为脱氧剂后,钢中夹杂物的主要类型为稀土夹杂物;而使用Al-RE-Si-Mn作为脱氧剂后,钢中夹杂物类型、尺寸及分布特征与Al-RE脱氧剂基本相当。稀土元素的加入能明显改善钢中夹杂物的类型及形貌,使主要夹杂物类型由带有棱角且形状不规则的富Al_(2)O_(3)型夹杂物转变为近球形的稀土夹杂物,同时降低了钢中夹杂物的最大尺寸,以及大尺寸的Al_(2)O_(3)夹杂物数量,但过量的稀土使得钢中出现了稀土夹杂物的团聚。Different deoxidizers were used for deoxidation in the vacuum smelting process of aero-engine bearing steel M50NiL,and the influence of different deoxidizer types on the morphology,type,size and number density of inclusions in the steel were studied.The results indicate that without adding deoxidizer,the inclusions in steel are mainly Al_(2)O_(3) and Al-Mg spinel.After using Al-RE as deoxidizer,the main types of inclusions in steel are rare earth inclusions.When Al-RE-Si-Mn is used as deoxidizer,the type,size and distribution characteristics of inclusions in steel are basically similar to those of Al-RE deoxidizer.The addition of rare earth elements can significantly improve the type and morphology of inclusions in steel,where the main inclusion types are transformed from Al_(2)O_(3)-rich inclusions with angular and irregular shapes to nearly spherical rare earth inclusions,while reduce the maximum size of inclusions in steel and the number of large-sized Al_(2)O_(3) inclusions.However,excessive addition of rare earth causes the agglomeration of rare earth inclusions in steel.

关 键 词：M50NiL钢 脱氧剂 Al-RE Al-RE-Si-Mn 非金属夹杂物 

分 类 号：TF76[冶金工程—钢铁冶金] TF704.1