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| Analysis of Laser Surface Hardened Layers of Automobile Engine Cylinder Liner | |
| 作者姓名： | LIU Xiubo YU Gang GUO Jian SHANG Quanyi ZHANG Zhenguo GU Yijie |
| 作者单位： | [1]Laboratory for Laser Intelligent Manufacturing, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China [2]School of Materials and Chemical Engineering, Zhongyuan Institute of Technology, Zhengzhou 450007, Henan, China [3]College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, Shandong, China |
| 摘 要： | The effects of rare earth (RE) on the microstructures and properties of high carbon high speed steel (HCHSS) were investigated. The results show that when suitable RE is added to the HCHSS, the effect of RE on the austenite and eutectic carbides is obvious. The austenite grain and coarse eutectic structure are refined, and flake carbides in the eutectic structures become short and fine. After heat treatment, most of the eutectic carbides are spheroidized and distributed in a uniform manner. The hardness and red hardness of modified HCHSS are slightly increased; impact toughness is greatly increased by 3781% and reaches 1017 J/cm2. The mechanism by which RE improves the structures and properties of HCHSS is also analyzed. |
| 关 键 词： | 激光面 汽车引擎 发动机 汽缸 |
| 收稿时间： | 2005-07-20 |
Analysis of Laser Surface Hardened Layers of Automobile Engine Cylinder Liner |
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| LIU Xiu-bo,YU Gang,GUO Jian,SHANG Quan-yi,ZHANG Zhen-guo,GU Yi-jie.Analysis of Laser Surface Hardened Layers of Automobile Engine Cylinder Liner[J].Journal of Iron and Steel Research,2007,14(1):42-0. | |
| Authors: | LIU Xiu-bo YU Gang GUO Jian SHANG Quan-yi ZHANG Zhen-guo GU Yi-jie |
| Affiliation: | 1. Laboratory for Laser Intelligent Manufacturing, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China;School of Materials and Chemical Engineering, Zhongyuan Institute of Technology, Zhengzhou 450007, Henan, China 2. Laboratory for Laser Intelligent Manufacturing, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China 3. School of Materials and Chemical Engineering, Zhongyuan Institute of Technology, Zhengzhou 450007, Henan, China 4. College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, Shandong, China |
| Abstract: | Gray cast iron that is used for automobile engine cylinder liners was laser surface hardened using Nd∶YAG quasi-continuous and CO2 continuous wave laser, respectively. The macromorphology and microstructure of the laser surface hardened layers were investigated using an optical microscope. Geometric dimensions including depth and width and microhardness distribution of the hardened layers were also examined in order to evaluate the quality of the hardened layers. |
| Keywords: | gray cast iron laser surface hardening microstructure hardness |
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