| 45钢激光铬钼合金层的相组织特征 |
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| 引用本文： | 吴宝善,杨德华.45钢激光铬钼合金层的相组织特征[J].兰州大学学报(自然科学版),1991,27(4):53-59. |
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| 作者姓名： | 吴宝善 杨德华 |
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| 作者单位： | 兰州大学物理系，中科院兰州化物所 兰州，730000，兰州，730000 |
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| 摘 要： |
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| 关 键 词： | 激光 胞状晶 合金层 钼 铬 |
The Characteristics of Phase Structure of Laser Alloyed Layer on the Surface of 45~# Carbon Steel with Chromium and Molybdenum |
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| Wu Baoshau.The Characteristics of Phase Structure of Laser Alloyed Layer on the Surface of 45~# Carbon Steel with Chromium and Molybdenum[J].Journal of Lanzhou University(Natural Science),1991,27(4):53-59. |
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| Authors: | Wu Baoshau |
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| Institution: | Wu Baoshau Department of Physics,Lanzhou Universty,Lanzhou,730000 Yang Dehua Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou,730000 |
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| Abstract: | In this paper, surface alloying of 45~# carbon steel with chromium andmolybdenum using CO_2 laser has been investigated. Through analysis of thethe phase structure, it has been shown that the structure of alloyed layeris principally cell crystal, the growth direction of cell ctystal is alongthe opposite direction of thermal current and has an evident preferredorientation. There exists small composition segregation between interiorand boundary of cell crystal. Because the alloying elements diffuse tothe interior and to the boundary of substrate grains at high temperature,the metallurgical combination of alloyed layer and substrate has beenrealized. The phases of alloyed layer include martensite, ferrite, residualaustenite and Mo_2C carbide. Through measuring the Content of residualaustenite, it can be seen that the content of residual austenite increaseswith the increase of the scaning speed of the laser beam. There is auniform distibution of alloying elements in the alloyed layer. |
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| Keywords: | laser cell crystal alloyed layer |
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