| 扫描速度对45钢表面激光熔覆层形貌及性能的影响 |
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| 引用本文： | 薛志芬,叶宏,王宾,邓代玉. 扫描速度对45钢表面激光熔覆层形貌及性能的影响[J]. 重庆理工大学学报(自然科学版), 2009, 23(3): 48-51,78 |
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| 作者姓名： | 薛志芬 叶宏 王宾 邓代玉 |
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| 作者单位： | 重庆工学院材料科学与工程学院; |
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| 摘 要： | 利用CO2激光器及SLC-2025D数控加工机床,改变激光的扫描速度,采用同步送粉法在45钢基体上熔覆NiCrSiB合金.用体视显微镜观察熔覆层形貌,测量熔覆层的几何尺寸;用扫描电镜观察熔覆层各个区域的显微组织形貌;用显微硬度计和M273电化学测试系统测试熔覆层的显微硬度和耐蚀性能.结果表明:随着扫描速度的增加,熔覆层的熔宽与横截面面积呈下降趋势;熔覆层的树枝晶细化,平面晶宽化.随扫描速度的增加熔覆层的耐蚀性能由于晶粒的细化而趋于良好.熔覆层显微硬度是基体的3~4倍.随着扫描速度的增加,熔覆层中颗粒相和合金元素的偏析减少,使硬度有所降低.
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| 关 键 词： | 激光熔覆 NiCrSiB合金 几何形貌 显微硬度 耐蚀性 |
Effect of Scanning Speed on Structure and Properties of Laser Cladding of 45 Steel |
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| XUE Zhi-fen,YE Hong,WANG Bin,DENG Dai-yu. Effect of Scanning Speed on Structure and Properties of Laser Cladding of 45 Steel[J]. Journal of Chongqing University of Technology(Natural Science), 2009, 23(3): 48-51,78 |
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| Authors: | XUE Zhi-fen YE Hong WANG Bin DENG Dai-yu |
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| Affiliation: | School of Material Science and Engineering;Chongqing Institute of Technology;Chongqing 400050;China |
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| Abstract: | NiCrSiB alloy is cladded on steel 45 substrate by CO2 laser and SLC-2025D numerical controlled machine tool by means of changing laser scanning speed and synchronized powder feeding.The macro-morphology and properties are analyzed with scanning electron microscope,microhardness meter and M273 electrochemical measurement system.The results show that,with increasing scanning speed,melt width and cross section show a downward trend;the microstructure is refined;and the corrosion resistance of the film is impro... |
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| Keywords: | laser cladding NiCrSiB macro-morphology microhardness corrosion resistance |
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