| 工艺参数对TiAl合金激光熔覆复合涂层的影响 |
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| 引用本文： | 刘秀波,王华明.工艺参数对TiAl合金激光熔覆复合涂层的影响[J].激光技术,2006,30(1):67-69. |
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| 作者姓名： | 刘秀波 王华明 |
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| 作者单位： | 1.中原工学院, 材料与化学工程系, 郑州, 450007; |
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| 摘 要： | 利用预涂NiCr-Cr3C2复合粉末对-γTiAl合金(简称TiAl合金)进行激光熔覆处理,制得了以Cr7C3,TiC硬质耐磨相为增强相,以-γNiCrAl镍基固溶体为基体的复合涂层;较系统地研究了光束扫描速度对TiAl合金激光熔覆复合材料涂层组织与耐磨性能的影响.结果表明,随着激光束扫描速度的提高,涂层显微组织有细化的趋势,显微硬度有所提高,而涂层厚度则有所降低.在中等扫描速度下(2.00mm/s)获得的涂层具有最好的滑动磨损耐磨性.
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| 关 键 词： | 激光熔覆 TiAl合金 工艺参数 显微组织 耐磨性 |
| 文章编号： | 1001-3806(2006)01-0067-03 |
| 收稿时间： | 2004-10-25 |
| 修稿时间： | 2005-05-25 |
The influence of processing parameters on laser cladding composite coatings on TiAl intermetallic alloy |
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| LIU Xiu-bo,WANG Hua-ming.The influence of processing parameters on laser cladding composite coatings on TiAl intermetallic alloy[J].Laser Technology,2006,30(1):67-69. |
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| Authors: | LIU Xiu-bo WANG Hua-ming |
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| Abstract: | The effect of processing parameters on the microstructure and wear property of laser cladding γ/Cr7C3/TiC composite coatings on TiAl intermetallic alloy substrates with NiCr-50% Cr3C2 precursor mixed powder is investigated. The results show that the microstructure of the laser cladding composite coatings is refined and the microhardness increases with the increasing of the laser beam scan-rate,but the thickness of the clad coating decreases. The laser cladding coating with the moderate(2.Omm/s)scan-rate exhibits the best wear-resistance under the full dry sliding wear test condition. |
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| Keywords: | laser cladding TiAl intermetallic alloy processing parameter microstructure wear-resistance |
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