块状Cu60Zr30Ti10非晶合金激光熔凝层的组织和硬度
Microstructure and Hardness of Laser Melted Layer on Bulk Cu60Zr30Ti10 Amorphous Alloy
摘 要
采用水冷铜模真空吸铸法制备了块状Cu60Zr30Ti10非晶合金,用Nd:YAG激光束(功率201.6 W)分别以20,40,60 mm·s-1的速度对合金表面进行重熔处理,采用X射线衍射仪、光学显微镜、显微硬度计和电子探针等研究了熔凝层的显微组织和不同深度的显微硬度.结果表明:经20 mm·s-1的激光重熔后,在块状非晶合金基体表面形成了两层新的组织,其中位于中间厚度约200 μm第二层的硬度、耐腐蚀性均比基体的有明显改善,显微硬度达到873 HV,该区域铜原子在弥散分布的尺寸为0.2～1 μm微区聚集.
Cu60Zr30Ti10
激光熔凝
显微硬度
bulk amorphous alloy
Cu60Zr30Ti10
laser melting
microhardness
Abstract
The Cu60Zr30Ti10 bulk amorphous alloy was prepared by water cooled copper mold vacuum suction casting.The surface of the alloy was scanned at the velocity of 20,40,60 mm·s-1 by the Nd:YAG laser beam (201.6 W).The microstructure and microhardness at different depths in the melted zone were investigated by means of X-ray diffraction meter,optical microscope,microhardness meter and electronic probe.The results show that two new layers on the surface of the bulk amorphous alloy were formed at 20 mm·s-1 laser scanning.The hardness(873 HV) and corrosion resistance of the second layer in the middle with the thickness of about 200 μm were evidently improved compared with those of the original substrate.Cu atoms accumulated in 0.2-1 μm dispersing microzones.
中图分类号 TG665
所属栏目 新材料 新工艺
基金项目 国家自然科学基金资助项目(50371020)
收稿日期 2008/8/3
修改稿日期 2009/2/11
网络出版日期
作者单位点击查看
备注黄钧声(1964-),男,湖南长沙人,副教授,博士.
引用该论文: HUANG Jun-sheng,YANG Yuan-zheng,TAO Ping-jun,WU Qi-liang,ZHANG Rong,ZHENG Shan. Microstructure and Hardness of Laser Melted Layer on Bulk Cu60Zr30Ti10 Amorphous Alloy[J]. Materials for mechancial engineering, 2009, 33(5): 87～89
黄钧声,杨元政,陶平均,吴启梁,张榕,郑善. 块状Cu60Zr30Ti10非晶合金激光熔凝层的组织和硬度[J]. 机械工程材料, 2009, 33(5): 87～89
被引情况:
【1】马壮,王倪,李玲,李智超, "Q235钢表面硼碳氮共渗层及氩弧重熔层的磨损性能",机械工程材料 39, 12-15(2015)
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参考文献
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【2】INOUE A,SHEN B,TAKEUCHI A.Development and application of bulk glassy alloy in late transition metal base system[J].Materials Transactions,2006,47(5):1275-1285.
【3】王家金.激光加工技术[M].北京:中国计量出版社,1992.
【4】AROMIN A S,ABROSIMOVA G E,GUROV A F,et al.Nanocrystallization of bulk Zr-Cu-Ti metallic glass[J].Materials Science and Engineering A,2001,304/306:375-378.
【5】杨元政,刘志国,刘正义,等.等离子喷涂Al2O3陶瓷涂层激光熔化深度的研究[J].激光技术,2000,24(5):312-317.
【6】AUDEBERT F,COLACO R,VILAR R,et al.Production of glassy metallic layers by laser surface treatment[J].Scripta Materials,2003,48:281-286.
【7】杨元政,仇在宏,谢致薇,等.块体非晶合金Cu58Zr30Ti10Sn2的形成与晶化行为研究[J].特种铸造及有色合金,2006,26(6):323-326.
【8】杨元政,仇在宏,谢致薇,等.合金元素对Cu60Zr30Ti10合金的非晶形成能力与显微硬度的影响[J].中国有色金属学报,2006,16(7):1155-1160.
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