Dissolution Behavior of WC Reinforced Particles on Carbon Steel Surface during Laser Cladding Process

Abstract:

Ni60WC35 self-fluxing composite coating was fabricated by transverse-flow CO2 laser apparatus on 45 medium-carbon steel surfaces. The microstructure and phase transform behavior of WC reinforced particles under the laser cladding conditions was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy-dispersive spectrometer (EDS). The results show that laser scanning speed has a great important influence on the microstructure of Ni-based WC composite coating, WC particles has a transition to the Ni-based coating. The main feature of WC particle is its edge hard phase has transformed into needle phase, and the needle phase areas increase with the decrease of the laser scanning speed. Some WC particles turn into needle clusters structure, and then white block phase. In addition, WC particle has some microscopic defects, and the surface priority defect can be dissolved. When the pool temperature rises to 1250°C, WC decomposition reaction become W2C and C. The elements diffusion can promote the dissolution of WC particles when the pool temperature rises continuously.

• Periodical: Advanced Materials Research (Volumes 430-432)
• Pages: 137-141
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.430-432.137
• Online since: January 2012
• Authors: Zhong Zhang, Hong Xi Liu, Xiao Wei Zhang, Sheng Wei Ji, Ye Hua Jiang
• Keywords: Dissolution Behavior, Laser Cladding, Medium-Carbon Steel, Microstructure, WC Reinforced Particle

References

[1] Songhua Si, Xiaomin Yuan, Yizhu He, et al.: Chinese J.Lasers Vol. 29(2002), pp.759-762,in Chinese.

[2] Ling Wang, Zhigang Chen, Xiaorong Zhu, et al.: Chinese J.Lasers Vol. 35(2008), pp.283-286,in Chinese.

[3] Ping Wu, Enyong Jiang, Changchi Zhou, et al.: Chinese J.Lasers Vol. 30(2003), pp.357-360,in Chinese.

[4] Fengxiao Huang, Zhonghao Jiang, Ximing Liu: Optics and Precision Engineering Vol. 19(2011), pp.318-321,in Chinese.

[5] Ling Pan, Wanzhen Gao, Chunxu Pan, et al.: Transactions of Materlals and HeatTreatment Vol. 31(2010),pp.130-133,in Chinese.

[6] Shaoyi Guo, Xingjun Li, Qiuhe Yang, et al.: Journal of Materlals Engineering Vol. (2008),pp.73-74,in Chinese.

[7] Lei Zhang, Huahui Chen, Huiyou Zhao, et al.: Tribology Vol. 28(2008),pp.486-489,in Chinese.

[8] Ding Fan, Ming Sun, Yaoning Sun, et al.: Journal of Aeronautical Materlals Vol. 28(2008),pp.41-43. in Chinese.

[9] Jiansheng Wang, Huimin Meng, Hongying Yu, et al.: Rare Metals Vol. 29(2010),pp.382-383.

[10] Shiyao Qu, Xinhong Wang, Zengda Zou, et al.: Transaction of the China Welding Institution Vol. 22(2001),pp.85-88,in Chinese.

[11] B.H Kear, G Skandan, R.K Sadangi: Scripta Materialia Vol. 44(2001),pp.1703-1707.

DOI: 10.1016/s1359-6462(01)00867-3

[12] C Verdon, A Karimi, J.-L Martin: Materials Science and Engineering:A Vol. 246(1998),pp.11-24.

[13] H.Li, K.A. Khor, L.G..Yu, P.Cheang: Surface and Coatings Technology Vol. 194(2005),pp.96-102.

[14] Jinping Suo, Di Feng, Heli Luo, et al.: Journal of Functional Materials Vol. 34(2003),pp.221-223,in Chinese.

[15] Ximing Liu: AppliedLaser Vol. 26(2006),pp.383-384,in Chinese.

[16] Zhifu Huang, Jiandong Xing, Wei He: Journal of Xi'an JiaoTong University Vol. 39 (2005),pp.284-285,in Chinese.

[17] Dalun Ye:Practical inorganic thermo-dynamic data handbook(The metallurgical industry press, Beijing 2002),in Chinese.

[18] Yingjiao Liang, Yinchang Che: Inorganic thermo-dynamic data handbook(Northeastern university press, Shenyang 1993),in Chinese.