摘要
采用双层辉光等离子表面冶金技术对TA15合金进行了Cr-Si复合渗处理,以形成Cr-Si复合渗层。随后将TA15合金置于700℃硫酸钠(Na_2SO_4)盐浴中热腐蚀100 h,以研究Cr-Si复合渗层能否提高TA15合金的热腐蚀性能。结果表明,经Cr-Si复合渗的TA15合金热腐蚀增重较无Cr-Si复合渗层的TA15合金大大减小,即Cr-Si复合渗明显提高了TA15合金的耐热腐蚀性能。其原因是,Cr-Si复合渗层均匀、致密,在热腐蚀过程中形成Cr_2O_3和SiO_2氧化膜,保护合金不受腐蚀。
The impregnation of TA15 alloy with both chromium and silicon was performed by employing a double glow plasma surface metallurgy technology to form a Cr-Si co-alloyed case. Subsequently, the TA15 alloy was subjected to hot corrosion in a molten sodium sulphate （Na2SO4 ） salt at 700 ℃ for 100 h to reveal whether the Cr- Si co-alloyed case could render the resistance to hot corrosion of the TA15 alloy better. The results indicate that surrosion of the TA15 alloy with the Cr - Si co-alloyed ease is much less than that of the TA15 alloy free from the Cr-Si co-alloyed case,i, e., the resistance to hot corrosion of the TA15 alloy is significantly improved due to the Cr- Si co-alloyed case, because the Cr-Si co-alloyed case is uniform and dense, and oxide films such Cr203 and SiO2 are formed in course of hot corrosion on its surface, thus protecting the alloy from being corroded.
出处
《热处理》
CAS
2016年第2期6-11,共6页
Heat Treatment
基金
国家自然科学基金(51474131)
江苏高校优势学科建设工程资助项目
江苏省普通高校研究生科研创新计划项目(KYLX15_0309)
