加热工艺对热成形钢表面纯锌镀层组织和表面氧化物的影响
Effects of Heat-treatment Process on Microstructure and Surface Oxide of GI Coating on Hot Stamped Steel
摘 要
采用FE-SEM和EDS分析了不同加热工艺后的热成形钢板纯锌镀层的相结构和表面状态，表面元素分布和XRD结果验证了加热后镀层表面的相组成。结果表明，高温加热后的镀层转变为氧化锌、Γ相和α-Fe(Zn)相;增加加热温度和保温时间都会导致镀层表面氧化锌的形成增加，并形成连续的氧化锌层。GI镀层在加热温度为870 ℃时，镀层表面主要成分为Fe-Zn合金相，只有少量的氧化物存在; 随加热温度和保温时间增加，镀层表面的氧化物逐渐增多，连续氧化铝层逐渐消失，Γ相也逐渐减少。
加热工艺
纯锌镀层
组织
氧化物
hot stamped steel
heating process
GI coating
microstructure
oxide
Abstract
Effects of heat-treatment process on phase structure of GI coating on hot stamped steel were studied by FE-SEM and EDS. The phase of coating surface after heating was analyzed by element distribution and XRD. The results showed that the coating consists of oxide layer, Γ phase and α-Fe(Zn) after heated at high temperature. With the increase of the heating temperature and holding time, zinc oxides were formed and became a continuous zinc oxide layer in the last. With the increase of heating temperature and holding time, the coating surface oxides gradually increased, but the continuous alumina layer disappeared and Γ phase gradually reduced.
中图分类号 TG174
所属栏目 试验研究
基金项目 国家“十二五”规划科技支撑项目(2012BAJ13B03)
收稿日期 2014/3/23
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备注张杰(1984-)，博士研究生，从事热成形钢镀层研究，
引用该论文: ZHANG Jie,JIANG She-ming,ZHANG Qi-fu,LIU Chang-sheng,Teng Hua-xiang. Effects of Heat-treatment Process on Microstructure and Surface Oxide of GI Coating on Hot Stamped Steel[J]. Corrosion & Protection, 2014, 35(5): 450
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