氧化镧添加剂和盐浴共渗温度对TC4钛合金硼氧共渗组织与性能的影响  

Effect of La2O3 additive and salt bath temperature on oxygen-boronized microstructure and properties of TC4 titanium alloy

作　　者：刘阳光 许晓静[1] 宋振华[1] 汪洋 朱亮亮 朱劲松 Liu Yangguang;Xu Xiaojing;Song Zhenhua;Wang Yang;Zhu Liangliang;Zhu Jinsong(Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Zhenjiang Jiangsu 212013,China;Jiangsu Tangchen Auto Parts Co.,Ltd.,Nantong Jiangsu 226534,China;South Asia ORESTE Machinery Co.,Ltd.,Nantong Jiangsu 226600,China)

机构地区：[1]江苏大学先进制造与现代装备技术工程研究院,江苏镇江212013 [2]江苏汤臣汽车零部件有限公司,江苏南通226534 [3]南亚奥里斯特机械有限公司,江苏南通226600

出　　处：《金属热处理》2020年第10期180-186,共7页Heat Treatment of Metals

基　　金：江苏省重大成果转化项目(2016126)。

摘　　要：采用OM、SEM、XRD、EDS、维氏硬度计以及摩擦试验机等分析手段研究了氧化镧添加剂和共渗温度对盐浴硼氧共渗试样组织与性能的影响。结果表明,共渗层厚度随着La_2O_3添加量的增加先增大后减小,当La_2O_3添加量为3%时,共渗层厚度达最大值(32.74μm);与低温(950℃)相比,高温(1000℃)时盐浴共渗层具有较好的表面,较高的共渗层厚度(34.19μm),较高表面硬度(1211 HV0.2),较大界面结合力(87.36 N)和更低的摩擦因数(0.28)。通过将温度对共渗过程的影响和试验结果分析得出:高温1000℃盐浴硼氧共渗试验更有研究价值。Effect of lanthanum oxide(La2 O3)additive and salt bath temperature on microstructure and properties of oxygen-boronized specimens were studied by means of OM,SEM,XRD,EDS,Vickers hardness tester and friction tester.The results show that the thickness of the oxygen-boronized layer increases first and then decreases with the increase of the amount of La2O3.When the content of La2O3 is 3%,the thickness of the layer reaches the maximum value(32.74μm).Compared with that obtained at the low temperature(950℃),at high temperature(1000℃)the layer has a better surface,with higher thickness(34.19μm),higher surface hardness(1211 HV0.2),larger interfacial bonding force(87.36 N),and lower friction coefficient(0.28).By analyzing the influence of temperature on the process of boronizing and the test results,it is concluded that the salt bath boronizing test with lanthanum oxide additive at 1000℃is more valuable.

关 键 词：氧化镧 盐浴渗硼 TC4钛合金 界面结合力 摩擦磨损性能 

分 类 号：TG178[金属学及工艺—金属表面处理]