摘要
采用热浸镀铝锰系合金层(HAD)工艺在Q235钢表面分别形成了Al-2%Mn、Al-9%Mn、Al-13%Mn铝锰系合金镀层,对改性层的组织结构及结合强度进行了分析。结果表明:纯铝镀层表面呈较粗大的枝晶结构,而铝锰合金镀层则出现了块状的铝锰化合物相,后者主要是由Al、FeAl3、Fe2Al5及MnAl6相组成;HAD改性层包括两部分:最外层是铝锰化合物层,其下是厚齿状的铁铝化合物过渡层。铝锰合金镀层具有较高的结合强度及承载能力,其平均临界载荷L c值随着其中含锰量的增加逐渐减小,由Al-2%Mn时的33N降低到Al-13%Mn时的24N。
Al-2% Mn,Al-9% Mn and Al-13% Mn alloy coatings on Q235 steel were obtained by hot-dip-aluminizing(HAD),respectively,and the microstructure and adhesion of the modified layer were analyzed. The results show that the pure aluminum coatings is acicular,while blocks Al-Mn compounds phase exists in Al-Mn alloys layer,and the Al-Mn alloy layer is composed of Al,FeAl3,Fe2Al5 and MnAl6 phases. The coatings consist of two-layers structure,i. e.,topcoat Al-Mn alloy layer and tongue-like intermetallic compound. The Al-Mn coatings possess high adhesion and load-bearing capacity. The adhesion of the Al-Mn alloy coatings are characterized by Lc value and it is found that the L c value gradually decrease with the increase of the Mn contents in alloy coatings,i. e.,from 33 N for Al-2% Mn coatings to 24N for Al-13% Mn one.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第S2期179-183,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51101132)
新疆自治区自然科学基金(2013211A007)
