摘要
选取两种不同成分体系的热镀锌双相钢为研究对象,对比分析了氧对双相钢镀层附着力的影响。结果表明,Cr-Mo系双相钢可镀性优于高铝系双相钢。对高铝系双相钢而言,退火过程基板中Al和Mn向带钢表面偏析,并与炉内氧发生氧化生成氧化铝,阻碍连续致密Fe2Al5抑制层的形成,是导致锌层附着力差的根本原因。Cr-Mo系双相钢虽然在退火过程也会发生氧化反应,但通过严格控制炉内氧含量可减少氧化物的形成,保证连续致密Fe2Al5过渡层的存在,从而大幅提升锌层附着力。
Two hot dip galvanizing dual phase steels with different chemical compositions were chosen for a contrastive study on the influence of oxygen on coating adhesion. It was found that the Cr-Mo dual phase steel is better in hot dip galvanization than the high A1 series. As to the high A1 dual phase steel, the Al and Mn segregated on the steel＇s surface and then oxidized restrain the formation of con- tinuous and dense Fe2Al5 inhibition layer, which is the key factor leading to the poor coating adhe- sion. Although oxidation also occurs in the annealing process of Cr-Mo dual phase steel, the oxides can be reduced by careful oxygen control and then, continuous and dense Fe2 Al5 inhibition layer will form and the coating adhesion will be improved greatly.
出处
《武汉科技大学学报》
CAS
2013年第5期370-374,共5页
Journal of Wuhan University of Science and Technology
关键词
双相钢
热镀锌双相钢
元素偏析
镀层附着力
dual phase steel
hot dip galvanizing steel
element segregation
coating adhesion
