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Feng S.,Ansteel Ltd. Technology Center | Wang Y.,Ansteel Ltd. Technology Center | Ding R.,Ansteel Ltd. Technology Center
Fenmo Yejin Jishu/Powder Metallurgy Technology | Year: 2015

The technique characteristics of powder metallurgy and the application condition of iron-dust in steel plants are summarized. The application of directly reduced iron in steelmaking, manufacture process of reduced iron powder and atomized iron powder in steel enterprises are represented respectively. The powder metallurgy products exploited in JFE and Kobe steel companies and their application fields, and the progress of powder metallurgy technology in China WISCO, LISCO are particularized. The influence factors of iron-based powder metallurgy industry development is analyzed. The fast increase of the demand for varieties and amount of iron-base powder metallurgy parts is promoted due to the development of auto industry and advancement of performance requirement for high-speed steel in cutting tool industry. It's pointed out that in the current plight for steel enterprises, iron-base powder metallurgy technology should be developed fast to find new profit growth points for enterprise and to achieve comprehensive utilization of resource. © 2015, Beijing Research Institute of Powder Metallurgy. All right reserved.

Shun L.-J.,University of Science and Technology Beijing | Shun L.-J.,Ansteel Company Ltd Technology Center | Li-Feng,Ansteel Company Ltd Technology Center | Gang Y.-H.,Ansteel Company Ltd Technology Center | Lin K.-Y.,University of Science and Technology Beijing
Advanced Materials Research | Year: 2011

In this article, the effects of galvanizing process parameters, especially cooling rate, on the microstructures of coating was investigated. The microstructures of Al-Zn-Si coating were analyzed by the following methods: surface microstructure, cross-section microstructure, thickness and composition of alloy layer by SEM and its accessories, distribution of each element along depth by glow-discharge emission spectrometer, micro-area elemental distribution image analysis of each element distribution on surface and cross-section by electron probe, crystallization orientation by X-ray diffraction instrument. The results showed that coating was made up of aluminum-rich dendrite, interdend itic zinc-rich phase and alloy layer, that cooling rate affected depth of alloy layer in Al-Zn-Si coating directly, that zinc concentrated in the surface layer of coating and silicon in the alloy layer, while the coating has larger depth it also concentrated in the surface layer, that aluminum-rich dendrite has preferred orientation in the solidification process. © (2011) Trans Tech Publications, Switzerland.

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