摘要
采用CO2横流式激光器对Q235／40Cr材料进行表面强化处理。使用S-360型扫描电镜观察激光硬化区金相组织及成分并观察表面磨损形貌，采用CHX-1超显微硬度计测量激光强化区断面的显微硬度。通过40Cr与冷轧Q235配副进行干摩擦试验，结果表明，与淬火40Cr配副的Q235的平均磨损速率最小，而与1400W激光功率处理40Cr配副的Q235的平均磨损速率最大，淬火的40Cr平均磨损速率是激光处理的2-3倍。40Cr磨损为磨粒磨损并有微裂纹产生，Q235以磨粒磨损为主，表面产生较深的犁沟。经激光硬化处理后40Cr的耐磨性要优于正常淬火40Cr的耐磨性。
The surface hardening treatment of Q235/40Cr steel was made with CO2 laser. The microstructures and phase compositions and fretted surface of laser transformation hardening zone were investigated with S-360 scanning electron microscope. Microhardness of laser hardening zone was measured with CHX-1 microhardness tester, dry wear experiments were done in pin-on-disc fretted wear machine of MPX-2000 model. Experimental results show that there is small average wear rate between 40Cr and cold roll Q235 in dry friction, there is big average wear rate between tempered 40Cr and cold roll Q235 in dry friction, and there is the biggest wear rate between 40Cr treated by laser and Q235. The average wear rate of tempered 40Cr is two to three times of that of 40Cr treated by laser. The wear of 40Cr is granular wear and there is small crack ,the wear of Q235 is manly granular wear and there is deep plough ditch. The wear resistance of 40Cr treated by laser is superior to tempered one. The hardness and depth of surface are influenced by laser power.
出处
《润滑与密封》
CAS
CSCD
北大核心
2007年第2期105-107,共3页
Lubrication Engineering
关键词
激光处理
耐磨性
40CR钢
laser treatment
wear resistance 40Cr steel
