喷丸与ZrO_2/Al_2O_3叠层对Cr_5Mo合金高温氧化性能的影响  

Effect of Shot Qeening and ZrO_2/Al_2O_3 Terrace Coating on the High-temperature Oxidation Resistance of Cr5Mo Alloy

作　　者：马静[1] 何业东[2] 王文青[3] 陈维视[1] 胡建文[1] 

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050054 [2]北京科技大学北京市腐蚀磨蚀与表面技术重点实验室,北京100083 [3]石家庄链轮总厂,河北石家庄050031

出　　处：《河北科技大学学报》2004年第4期33-36,共4页Journal of Hebei University of Science and Technology

基　　金：博士点基金资助项目(2000000815)

摘　　要：采用喷丸处理及溶胶 凝胶工艺涂覆ZrO2/Al2O3叠层对Cr5Mo合金进行了表面处理,研究了不同处理的合金试样在600℃空气中的高温氧化性能。从SEM,XRD及氧化动力学分析结果发现,喷丸处理不能使Cr5Mo合金表面形成保护性的氧化铬膜,反而促进了Cr5Mo合金的高温氧化,其氧化增重与氧化剥落速率最高;ZrO2/Al2O3叠层通过稀土效应改变了氧化膜的生长机制,降低了氧化铬膜的生长速率,促进了合金表面铬的选择氧化,起到了优异的保护作用,大大提高了合金的抗高温氧化性能。s:Shot peening and ZrO_2/Al_2O_3 terrace coating by sol-gel technique are applied to Cr5Mo alloy,and their high-temperature oxidation properties have been studied.SEM,XRD and oxidation kinetics curves indicate that shot peening can not promote the forming of protective Cr_2O_3scale,on the countary it accelerates the oxidation of the alloy,and its weight gain and spallation weight are highest.ZrO_2/Al_2O_3 terrace coating by sol-gel technique alters the growth mechnism of scale through reactive element reactive,and decreases the growth rate of Cr_2O_3 scale.The high-temperature oxidation resistance of alloy is improved greatly due to the selective oxidation of Cr on the surface of the alloy based on sol-gel process.

关 键 词：合金 抗高温氧化性能 铬膜 CR5MO 喷丸处理 氧化动力学 表面 ZRO2 Al2O3 氧化铬 

分 类 号：N09[自然科学总论—科学技术哲学] TG174[金属学及工艺—金属表面处理]