摘要
采用粉末包埋法在耐热钢T91表面制备渗铝涂层,并研究了其在800和850℃空气中的等温氧化行为,结果显示,耐热钢T91合金和渗铝涂层在这2种温度下的氧化动力学均近似服从抛物线规律,T91无论在800和850℃空气中的等温氧化时其表面均生成了具有尖晶石结构的不具有保护性的FeCr混合氧化物层;当合金表面采用粉末包埋法渗铝后能显著降低在这2种温度下的氧化增重,原因是高温氧化后在涂层表面生成了一层连续、致密、与涂层结合良好的保护性氧化膜Al2O3,因而对基体合金起到了良好的防护作用。
In this investigation, powder embedding method was employed to deposit aluminized coating on heat-resisting steel T91 alloy and high temperature oxidation behaviors of the coating were investigated at 800 ℃ and 850 ℃ in air. The results show that the oxidation behaviors of Tgl and the coating obey parabolic law at two temperatures. After 300h oxidation, the surface of Tgl forms a non-protective thick FeCr spinel oxides layer; however, a continuous, compact, and protective Al2O3 layer is formed on the aluminized coating to prohibit the T91 from quick corrosion during both temperature oxidations.
出处
《沈阳师范大学学报（自然科学版）》
CAS
2015年第2期156-159,共4页
Journal of Shenyang Normal University:Natural Science Edition
基金
辽宁省教育厅高等学校科学研究项目(L2012394)
沈阳师范大学实验中心主任基金项目(Sy2x1002)
关键词
渗铝涂层
耐热钢T91合金
高温防护涂层
高温氧化
aluminized coating
heat-resisting steel T91
high temperature protective coating
high temperatureoxidation
