Influences of single laser tracks space on the rolling fatigue contact of gray cast iron》.pdfVIP

Optics Laser Technology 72 (2015) 15–24 Contents lists available at ScienceDirect Optics Laser Technology journal homepage: /locate/optlastec Influences of single laser tracks space on the rolling fatigue contact of gray cast iron Zhi–kai Chen a, Ti Zhou a, Peng Zhang a, Hai-feng Zhang a,b, Wan-shi Yang a, Hong Zhou a,n, Lu-quan Ren c a The Key Lab of Automobile Materials, The Ministry of Education, Jilin University, Changchun 130025, PR China b The Department of Mechanical and Automotive Engineering, Changchun University, Changchun 130025, PR China c The Key Lab of Terrain Machinery Bionics Engineering, The Ministry of Education, Jilin University, Changchun 130025, PR China a r t i c l e i n f o a b s t r a c t Article history: To improve the fatigue wear resistance of gray cast iron, the surface is modified by Nd:YAG laser to Received 7 January 2015 imitate the unique surface of soil creatures (alternative soft and hard phases). After laser treatment, the Received in revised form remelting region is the named unit which is mainly characterized of compact and refinement grains. In 16 March 2015 the present work, the influence of the unit space on the fatigue wear resistance is experimentally stu- Accepted 16 March 2015 died. The optimum space is proven to be 2 mm according to the tested results and two kinds of dela- Available online 2 April 2015 mination are observed on samples worn surface. Subsequently, the