Research on the lack of alloying in the galvannealed coating of automotive sheet steel

查看全文 作　　者：Yu [1]Xuebin;Li [2]Mangmang

机构地区：[1]Auto Steel Division, Baosteel Research Institute, Baoshan Iron & Steel Co. Ltd. , Shanghai 201900, China;[2]Baosteel-NSC/Acelor Automotive Steel Sheets Co. ,Ltd. , Shanghai 200941 ,China

出　　处：《Baosteel Technical Research》索引2008年第2卷第4期,共4页

摘　　要：Samples of the cross section microstructures of galvannealed steel sheets that lack alloying were analyzed.X-ray diffraction(XRD) tests were carried out.The study discovers that the deficit of alloying was higher on both sides of the steel sheet when compared to the center and the thickness of the coating on the sides was also higher than the center.The results of the XRD tests demonstrate that the microstructure of the coating with a lack of alloy is mainly composed of zinc,ζ and δ.They also indicate that the lack of alloying is mainly due to a lower galvannealing temperature and thicker coating.It is shown by the optical micrographs of coating that the δ phase forms first in a discontinuous manner at the interface and then rapidly pushes towards the coating and enlarges. 关键词：炼制合金汽车用钢板冶炼技术温度条件

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Research on the lack of alloying in the galvannealed coating of automotive sheet steel

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