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The Second China Energy Scientist Forum (CESF 2010 E-BOOK)

Xuzhou,China,10.18-10.19，2010

ISBN: 978-1-935068-37-2 Scientific Research Publishing, USA

E-Book 2244pp Pub. Date: October 2010

Category: Medicine & Healthcare

Price: $360

Title: Effects of Surface Mechanical Attrition Treatment(SMAT) and the Content of Zn on Low-Temperature Pack Aluminizing Process for Pipeline Steel X80
Source: The Second China Energy Scientist Forum (CESF 2010 E-BOOK) (pp 2086-2089)
Author(s): Yu Wang, School of Materials Science and Engineering, Xi’an Shiyou University Xi’an 710065, Shaanxi, China)
Min Huang, School of Materials Science and Engineering, Xi’an Shiyou University Xi’an 710065, Shaanxi, China)
Xiangxu Jie, School of Materials Science and Engineering, Xi’an Shiyou University Xi’an 710065, Shaanxi, China)
Xinbo Shi, School of Materials Science and Engineering, Xi’an Shiyou University Xi’an 710065, Shaanxi, China)
Abstract: Low-temperatrue pack aluminizing processes were carried out on the original pipeline steel X80 and those after surface mechanical treatment for 50 min in the pack powder consisting of Al and Zn as the main active atom source, and NH4Cl as the activator. The effects of SMAT and the addition content of Zn on the coating thickness and atom diffusion characterization of as-aluminized pipeline steel were studied. By using of different content of Zn, the atom diffusion rate in the as-SMATed pipeline steel X80 is always far higher than that of non-SMATed substrate packed at the temperatrue that can not break up the impact of SMAT. The unstable bulk diffusion is the main atom diffusion form in the as-SMATed pipeline steel X80 which is accordance with Fick rule driven by the gradient of atom activity. The state change of pack powder caused by diffusion temperature and the content of Zn is considered as the reason of as-packed coating with different products.
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