采用爆炸喷涂方法在2Cr10MoVNbN钢基体表面制备了Cr3C2-NiCr涂层,利用光学显微镜、扫描电镜、X射线衍射仪、能谱仪、显微硬度计、电子拉伸试验机、X射线应力仪、疲劳试验机等分析测试了涂层的缺陷、显微硬度、断裂韧度、结合力、残余应力、疲劳性能等,主要研究了涂层对基体疲劳性能的影响.结果表明:在2Cr10MoVNbN钢基体上采用爆炸喷涂方法制备的Cr3C2-NiCr涂层的孔隙率为0.5%,表面硬度为921 HV,断裂韧度为3.67 MPa·m1/2 ,涂层与基体的结合强度为63 MPa,涂层表面、涂层/基体界面处均处于压应力状态;爆炸喷涂Cr3C2-NiCr涂层明显降低了2Cr10MoVNbN钢基体的疲劳性能,在应力幅小于500 MPa时,与基体试样相比,涂层试样的疲劳寿命减少了75%以上,疲劳强度下降了134.7 MPa,涂层试样的疲劳裂纹源出现在涂层/基体界面的Al2O3夹杂物处.
所属栏目
材料性能及其应用
收稿日期
2008/5/262008/11/11
作者单位
陈昭运:哈尔滨工程大学材料科学与化学工程学院, 黑龙江 哈尔滨 150001
孟祥红:哈尔滨工程大学材料科学与化学工程学院, 黑龙江 哈尔滨 150001
李建明:哈尔滨工程大学材料科学与化学工程学院, 黑龙江 哈尔滨 150001
备注
陈昭运(1962-),女,黑龙江哈尔滨人,教授.
引用该论文:
CHEN Zhao-yun,MENG Xiang-hong,LI Jian-ming.Detonation Spraying Cr3C2-NiCr Coatings and Its Effect on Fatigue Property of 2Cr10MoVNbN Steel Substrate[J].Materials for mechancial engineering,2009,33(6):85～89
陈昭运,孟祥红,李建明.爆炸喷涂Cr3C2-NiCr涂层及其对2Cr10MoVNbN钢疲劳性能的影响[J].机械工程材料,2009,33(6):85～89
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