HUA Xi-jun,LIU Kai,ZHOU Wan,FU Yong-hong,WANG Rong,SUN Jian-guo.Research of Antifriction and Wear Resistance Composite Technology by Laser-texturing and Quenching on 45# Steel Surface[J],43(4):86-91
Research of Antifriction and Wear Resistance Composite Technology by Laser-texturing and Quenching on 45# Steel Surface
Received:March 04, 2014  Revised:April 27, 2014
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KeyWord:45#steel  laser quenching  microstructure  solid lubrication
                 
AuthorInstitution
HUA Xi-jun Mechanical Engineering College, Jiangsu University, Zhenjiang ,China
LIU Kai Mechanical Engineering College, Jiangsu University, Zhenjiang ,China
ZHOU Wan Mechanical Engineering College, Jiangsu University, Zhenjiang ,China
FU Yong-hong Mechanical Engineering College, Jiangsu University, Zhenjiang ,China
WANG Rong Mechanical Engineering College, Jiangsu University, Zhenjiang ,China
SUN Jian-guo Mechanical Engineering College, Jiangsu University, Zhenjiang ,China
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Abstract:
      Objective To improve the hardness and antifriction properties on 45# steel surface. Methods Laser quenching was performed on the 45# steel surface. The effects on the hardened depth and width of the quenched surface by laser powers and scanning speeds were studied. The micro-hardness and micro-structure were analyzed on the different parts of the hardened layer. Uniform-distributive micro-dimples were conducted on the smooth surface of 45# steel specimens by diode-pumped Nd:YAG laser machine and MoS2 -PI-Gr composite solid lubricants were filled into the texture by hot-pressing method, then tribological performance comparison with the untreated smooth 45# steel surface was carried out. Results The hardness of 45# steel surface could reach up to 835HV and the friction coefficient caould be reduced by almost 50% through laser-texturing and quenching composite technology. Conclusion The hardness of 45# steel surface could be increased and the friction coefficient could be reduced by laser-texturing and quenching composite technology, which would have a good engineering application prospect.
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