| 稀土含量对激光表面熔铸涂层开裂敏感性的影响 |
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| 引用本文： | 刘其斌,陈江,朱维东,罗筑,于杰.稀土含量对激光表面熔铸涂层开裂敏感性的影响[J].贵州工业大学学报(自然科学版),1996(6). |
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| 作者姓名： | 刘其斌 陈江 朱维东 罗筑 于杰 |
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| 作者单位： | 贵州工业大学材料中心，中科院金属腐蚀与防护研究所，贵州工业大学材料中心 |
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| 摘 要： | 本文研究了高温镍基铸造合金ＨＨ３３上稀土含量对激光表面熔铸钻基合金涂层开裂敏感性的影响。结果表明，不加稀土时，基体中出现了微裂纹；稀土含量为０．５％Ｗｔ时，裂纹由基体向涂层扩展；稀土含量为２％Ｗｔ时，裂纹进一步扩展直至贯穿涂层。此时，裂纹的长度和宽度最大，裂纹周围的组织粗大；当稀土含量为３％Ｗｔ时，涂层及基体无裂纹出现，且涂层组织细小、均匀．涂层显微硬度值较未加稀土时低。
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| 关 键 词： | 稀土 激光表面熔铸 开裂敏感性 |
EFFECTS OF RARE EARTH CONTENT ON LASER SURFACE MELT-CASTING COATING CRACKING SUSCEPTIBILITY |
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| Liu Qibin.EFFECTS OF RARE EARTH CONTENT ON LASER SURFACE MELT-CASTING COATING CRACKING SUSCEPTIBILITY[J].Journal of Guizhou University of Technology(Natural Science Edition),1996(6). |
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| Authors: | Liu Qibin |
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| Institution: | Liu Qibin(Material Centre of GUT)Chen Jiang(The Institute of Metal Corrosion and Protection of China Academg of Sciences)Zhu Weidong; Luo Zhu; Yu Jie(Material Centre of GUT) |
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| Abstract: | in the present paper, effects of rare earth content of high temperature cast Ni-based alloy GH33 on the cracking susceptibility of laier melt-casting Co-based alicy coating are studied. The experimental results indicate that microcrack appears in substrate with no rare earth in coating; crack propagates from substrate into coating with 0. 5% wt rare earth in coating; crack propagates through coating with 2% wt rare earth in coating while the length and width of crack are the maximum and the microstructure round crack is rough; and there is no crack in coating and substrate when content of rare earth goes up to 3% wt. The homogeneous and fine microstructure in coating is obtained, and the microhardness in coating is lower than that with no rare earth. |
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| Keywords: | rare earth laser surface melt-casting cracking susceptibility |
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