Mechanical Properties of Vermicular Graphite Cast Iron Processed by Selective Laser Surface Alloying with Ultra-fine ZrO2 Ceramic Particulates  

作　　者：Peng-Yu Lin Zhi-Hui Zhang Shu-Hua Kong Hong Zhou Yunhong Liang Xin Tong Lu-Quan Ren 

机构地区：[1]The Key Laboratory of Engineering Bionics (Ministry of　Education, China) and the College of Biological and　Agricultural Engineering, Jilin University (Nanling Campus)Changchun 130025, China [2]The Department of Weld Planning, FAW-Volkswagen Co.Ltd., Changchun 130011, China [3]The Key Laboratory of Automobile Materials (Ministry of Education, China) and School of Materials Science and Engineering, Jilin University (Nanling Campus), Changchun 130025, China [4]The National Engineering Laboratory for Modem Materials Surface Engineering Technology, Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510651, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2016年第11期985-992,共8页金属学报（英文版）

基　　金：supported by Project 985-Bionic Engineering Science and Technology Innovation of Jilin University;the National Natural Science Foundation for Youths (No. 51205160);the Pearl River S&T Nova Program of Guangzhou (No. 2014J2200095)

摘　　要：In this work, the mechanical properties and microstructures of vermicular graphite cast iron processed by selective laser surface alloying with ultra-fine ZrO2 ceramic particulates were investigated. A particulate-reinforced metal matrix composite coating with the thickness of -650 μm was fabricated by laser treatment on the sample surface. The particulates were uniformly distributed in the microstructure of the coating. The tensile strength and microhardness both increased with the particulate fraction, since more tensile load was transferred from the matrix to the reinforcement showing essential strengthening effect. The composite coating also sharply reduced the wear mass loss and thus improved the wear resistance.In this work, the mechanical properties and microstructures of vermicular graphite cast iron processed by selective laser surface alloying with ultra-fine ZrO2 ceramic particulates were investigated. A particulate-reinforced metal matrix composite coating with the thickness of -650 μm was fabricated by laser treatment on the sample surface. The particulates were uniformly distributed in the microstructure of the coating. The tensile strength and microhardness both increased with the particulate fraction, since more tensile load was transferred from the matrix to the reinforcement showing essential strengthening effect. The composite coating also sharply reduced the wear mass loss and thus improved the wear resistance.

关 键 词：Scanning electron microscopy Mechanical characterization Magnesium alloys Grainrefinement HARDNESS 

分 类 号：TG174.4[金属学及工艺—金属表面处理]