Process optimization of a hybrid twin-wire arc sprayed composite coating
-
摘要: 异质双丝电弧喷涂是利用两根不同材质金属丝制备复合涂层的一种工艺. 对于熔点相差较大的丝材组合，常出现高熔点材料熔化不完全、频繁断弧的现象. 为此文中提出了异步送丝的电弧喷涂方法，并对碳钢丝—铝丝双丝组合喷涂的电弧区行为展开了研究. 结果表明，异步送丝的电弧喷涂设备可有效解决熔点差别较大的异质双丝电弧喷涂时的稳定性问题. 最后使用扫描电镜和X射线衍射仪对Fe-Al复合涂层的组织进行表征，表明异质双丝电弧喷涂过程中阴阳两极材料间基本不发生冶金反应，形成的是一种铝软质颗粒和碳钢硬质颗粒交错叠加的机械混合涂层.Abstract: Hybrid twin-wire arc spraying is a typical process that using two different metal wires as the feeding material. For some occasions the melting point of the two wires is different highly, the higher melting point wire always does not be melted totally and the arc extinguishes frequently. In the present study, a new spraying method using asynchronous feeding for the two wires was put forward, and the arc behavior during spraying of carbon steel and aluminum twin wires was investigated. The results show that, the stability of the hybrid twin-wire arc spraying process was improved significantly when using the asynchronous feeding spray system. Finally, the structure of the Fe-Al composite coating was characterized using a scanning electron microscope and an X-ray diffraction instrument. It is manifested that metallurgical reaction is rarely generated between the anode and cathode for the hybrid twin-wire arc spraying. A mechanically mixed coating is therefore formed, in which the aluminum splats and carbon steel splats are inter-deposited.
-
-
[1] Li Zhanming, Zhu Youli, Ye Xionglin, et al. On line measurement and analysis of cross flying behavior in twin wire arc spray[J]. China Surface Engineering, 2005, 18(5): 12 − 15
[2] Liao H L, Zhu Y L, Bolotr, et al. Size distribution of particles from individual wires and the effects of nozzle geometry in twin wire arc spraying[J]. Surface and Coatings Technology, 2005, 200: 2123 − 2130.
[3] Zhu Y L, Liao H L, Coddet C, et al. Characterization via image analysis of cross-over trajectories and inhomogeneity in twin wire arc spraying[J]. Surface and Coatings Technology, 2003, 162: 301 − 308.
[4] Song Gang, Shen Qingxi, Liu Liming. Preparation and analysis of Al-Mg intermetallic coating[J]. Transactions of the China Welding Institution, 2011, 32(6): 9 − 12
[5] Zhang Jiaying, Xu Binshi, Dai Lianhui. Arc burning process analysis in wire arc spray process[J]. Transactions of the China Welding Institution, 2011, 32(6): 17 − 20
[6] 李占明, 朱有利, 叶雄林, 等. 双丝电弧喷涂中粒子交叉飞行行为的在线测量及分析[J]. 中国表面工程, 2005, 18(5): 12 − 15 [7] Chen Yongxiong, Liang Xiubing, Zhang Zhibing, et al. Investigation of the electric arc and steel wire melting behaviors during the high velocity arc spraying process[J]. Transactions of the China Welding Institution, 2013, 34(9): 17 − 20.
[8] 宋 刚, 沈庆喜, 刘黎明. 铝-镁金属间化合物涂层的制备与分析[J]. 焊接学报, 2011, 32(6): 9 − 12 [9] Chen Y X, Xu B S, Liang X B, et al. Comparative study of 321 stainless steel and 321-Al composite coatings deposited by arc spraying process[J]. Key Engineering Materials, 2008, 373-374: 19 − 22.
[10] Chen Y X, Xu B S, Xu Y, et al. Structure and sliding wear behavior of 321 stainless steel-Al composite coating deposited by high velocity arc spraying technique[J]. Trans. Nonferrous Met. Soc. China, 2008, 18: 603 − 609.
[11] Watanabe T, Sato T, Zezu A. Electrode phenomena investigation of wire arc spraying for preparation of Ti-Al intermetallic compounds[J]. Thin Solid Films, 2002, 407: 98 − 103.
[12] Watanabe T, Wang X, Pfender E, et al. Correlations between electrode phenomena and coating properties in wire arc spraying[J]. Thin Solid Films, 1998, 316: 169 − 173.
[13] 张甲英, 徐滨士, 戴连辉. 电弧喷涂电弧燃烧过程分析[J]. 焊接学报, 2011, 32(6): 17 − 20 [14] 陈永雄, 梁秀兵, 张志彬, 等. 碳钢高速电弧喷涂的电弧特征及材料过渡行为研究[J]. 焊接学报, 2013, 34(9): 17 − 20 -
期刊类型引用(0)
其他类型引用(2)
计量
- 文章访问数: 157
- HTML全文浏览量: 0
- PDF下载量: 3
- 被引次数: 2
下载:
