锆合金表面激光熔覆TiN/ZrN复合陶瓷涂层的研究

陈科培; 陈志勇; 刘丹; 唐翠; 朱卫华; 何彬; 王新林

应用激光, 2015, 35 (2): 166, 网络出版: 2015-05-20

锆合金表面激光熔覆TiN/ZrN复合陶瓷涂层的研究

Studying on Laser Cladding TiN/ZrN Composite Ceramic Layer on Zirconium Alloy

论文大纲

陈科培 ^1,*陈志勇 ²刘丹 ¹唐翠 ¹朱卫华 ²何彬 ¹王新林 ^1,2

作者单位

¹ 南华大学机械工程学院, 湖南衡阳 421001

² 南华大学电气工程学院, 湖南衡阳 421001

激光熔覆锆合金显微组织显微硬度 laser cladding Zr alloy microstructure microhardness

摘要

为提高锆合金表面的耐摩擦、耐腐蚀性能, 研究在锆合金表面激光熔覆TiN粉末, 制备TiN/ZrN陶瓷涂层。采用扫描电镜(SEM)、X射线衍射仪(XRD)、能量散射X射线谱仪(EDX), 分别分析了熔覆层的显微组织形貌、成分与相结构, 测试了激光熔覆层的显微硬度。结果表明, 在适当的工艺参数下, 可制备出没有裂纹、气孔和表面质量良好的熔覆层。熔覆层的表层有大量密集生长的树枝晶组织, 中层开始出现颗粒状和块状的组织, 结合区有少量的纤维状组织, 且熔覆层主要由Zr、ZrN、TiN等相组成。激光熔覆层硬度值从表及里呈递减变化, 熔凝层的硬度最高达到863 HV0.1, 是锆合金基体(约为180 HV0.1)的4.8倍。

Abstract

The TiN/ZrN composite ceramic coating was manufactured by laser cladding TiN powder on Zr alloy surface to improve the surface property of friction resistance and corrosion resistance. Micro-structure morphology, composition and phase distributions of the composite coating are investigated by scan electron microscopy(SEM), energy-dispersive X-ray spectroscopy(EDX), X-ray diffraction(XRD), respectively. The micro-hardness of the ceramic layer is also measured. The results show that the TiN/ZrN ceramic coating with good surface quality can be formed by using appropriate experimental parameters. On the surface of the cladding layer, there is a large number of dense growth of dentritic structure; on the middle zone, granular and massive tissue began to appear; On the combining region, there exist a small amount of fibrous tissue. The coating is mainly composed of Zr, ZrN, TiN. The microhardness of the cladding from the surface to the bottom of the clad coating changed gradually, and the highest hardness of the cladding reaches 863 HV0.1,which is 4.8 times of the substrate(about 180 HV0.1).

参考文献

[1] KUTTY T R G, RAVI K, GANGULY C.Studies on hot hardness of Zr and its alloys for nuclear reactors［J］.Journal of Nuclear Materials, 1999, 265(1-2): 91-99.

[2] 王旭峰, 李中奎, 周军, 等.锆合金在核工业中的应用及研究进展［J］.热加工工艺, 2012, 41(2): 71-74.

[3] 袁改焕, 李恒羽, 王德华.锆材在核电站的应用及前景［J］.稀有金属快报, 2007, 26(1): 14-16.

[4] KIM HYUNGKYU, LEE YOUNGHO, HEO SUNGPIL.Mechanical and experimental investigation on nuclear fuel fretting［J］.Tribology International, 2006, 39(10): 1305-1319.

[5] LEE SUNGJOON, PARK CHANJIN, LIM YUNSOO, et al.Influences of laser surface alloying with niobium (Nb) on the corrosion resistance of Zircaloy-4［J］.Journal of Nuclear Materials, 2003, 321(2-3): 177-183.

[6] 吕雪峰, 陆道纲, 刘滨.压水堆核电站锆水反应微观机理［J］.原子能科学技术, 2010, 44(3): 299-303.

[7] 文向东, 陈志勇, 朱卫华, 等.激光原位熔覆制备TiC/TiB硬质陶瓷复合涂层［J］.激光与红外, 2013, 43(4): 371-375.

[8] KIM HYUNGHOON, KIM JUNHO, MOON JINYOUNG, et al.High-temperature oxidation behavior of zircaloy-4 and zirlo in steam ambient［J］.J. Mater. Sci. Technol., 2010, 26(9): 827-832.

[9] KIM HYUNGIL, KIM ILHYUN, JUNG YANGIL, et al.Properties of Zr alloy cladding after simulated loca oxidation and water quenching［J］.Nuclear Engineering and Technology, 2010, 42(2): 193-202.

[10] KIM HYUNGIL, KIM ILHYUN, JUNG YANGIL, et al.High-temperature oxidation behavior of Cr-coated zirconium alloy: Top Fuel 2013, Charlotte, North Carolina, September 15-19, 2013［C］.

[11] AMOUZOUVI K F, CLEGG L J, STYLES R C, et al.Microstructural changes in laser hardened Zr-2.5Nb alloy［J］.Scripta Metallurgica et Materialia, 1995, 32(2): 289-294.

[12] 王一凌.纯氩环境锆合金脉冲激光焊接特性研究［D］.哈尔滨: 哈尔滨工业大学, 2012.

[13] MUNIDASA M, MA TIANCHI, MANDELIS A.Non-destructive depth profiling of laser-processed Zr-2.5Nb alloy by IR photothermal radiometry［J］.Materials Science and Engineering, 1992(159 A): 111-118.

[14] 王新林, 石世宏, 郑启光.激光熔覆层凝固特征与凝固组织控制研究［J］.应用激光, 2001, 21(3): 164-166.

[15] KURZ W, FISHER D J.Fundamentals of solidification［M］.Trans Tech Publications Ltd., 1998.

[16] 黄国栋, 王新林.激光熔覆层表面皱折成因的研究［J］.激光技术, 1994, 18(5): 289-292.

[17] 叶大伦.实用无机物热力学数据手册［M］.2版.北京: 冶金工业出版社, 2002.

[18] 颜培.ZrTiN梯度涂层刀具的制备及性能研究［D］.山东: 山东大学, 2012.

陈科培, 陈志勇, 刘丹, 唐翠, 朱卫华, 何彬, 王新林. 锆合金表面激光熔覆TiN/ZrN复合陶瓷涂层的研究[J]. 应用激光, 2015, 35(2): 166. Chen Kepei, Chen Zhiyong, Liu Dan, Tang Cui, Zhu Weihua, He Bin, Wang Xinlin. Studying on Laser Cladding TiN/ZrN Composite Ceramic Layer on Zirconium Alloy[J]. APPLIED LASER, 2015, 35(2): 166.

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