摘要
针对应用于连续热镀锌生产线上辊类部件用材设计的奥氏体合金,系统研究了自制铁铬锰合金在工业锌液中(Zn-0.2%Al)的腐蚀行为及组织变化规律.研究表明:铁铬锰合金在工业锌液中具有良好的耐锌腐蚀能力,其腐蚀速率为8.11×10-4 g/(cm2.h),而316L的腐蚀速率为1.65×10-3 g/(cm2.h);铁铬锰合金在工业锌液中首先生成Fe2Al5,其稳定性较好,可长时间抑制铁锌反应,12 d后铁锌金属间化合物才开始出现,生成的δ(FeZn7)相中,因固溶了质量分数约为5.14%的Cr,使得δ相稳定性增加,进一提高了铁铬锰合金的耐锌腐蚀能力.以锰代镍来制取低成本的铁铬锰耐锌腐蚀合金具有可行性.
A austenitic alloy-FeCrMn alloy for immersed rolls in continuous hot-dip coating lines was developed,and a systematic study of corrosion behaviors of this alloy in molten zinc at 450 ℃ was carried out to better understand the reaction mechanism.The results show that the corrosion rate of the FeCrMn alloy in galvanizing bath is approximately 8.11×10^-4 g/（cm^2·h）,while that of the 316L is 1.65×10^-3 g/（cm^2·h）.It is also found that the phase of Fe2Al5can exist in the FeCrMn alloy stably for 12 days.In comparison,a Fe-Zn intermetallic compound forms in the 316L after 5 days.After 12 days,the δ phase appears in the FeCrMn alloy which contains about 5.14% Cr.The existence of Cr improves the stabilization of δ phase by slowing down the reaction of Fe and Zn.So it is feasible to substitute manganese for nickel in making the FeCrMn austenitic corrosion resistance alloy.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2010年第6期762-766,共5页
Materials Science and Technology
基金
"耐液态铝锌硅高温腐蚀的新合金材料"中小企业创新基金项目(07KW14003)
