功率超声对ZA27合金显微组织与耐磨性的影响  

Effects of Power Ultrasonic on Microstructure and Wear Resistance of ZA27 Alloy

作　　者：郭文涛[1] 李军文[1,2] 常国威[1] 

机构地区：[1]辽宁工业大学材料科学与工程学院 [2]江南大学机械工程学院

出　　处：《特种铸造及有色合金》2011年第11期1074-1076,共3页Special Casting & Nonferrous Alloys

基　　金：辽宁省教育厅创新团队项目(2008T088);辽宁省自然科学基金资助项目(20082177);江南大学科研启动基金资助项目(20100385)

摘　　要：在500℃熔体保温条件下对工业用ZA27合金进行超声波振动处理,发现经超声处理后ZA27合金由均匀细小的等轴晶组织组成。随功率的增加平均晶粒尺寸由70μm减小到40μm,磨损量由5.6mg减小到1.3mg。结果表明,声流搅拌和空化作用能够细化ZA27合金的显微组织,使η+β相均匀分布在α相晶界处。超声波能够提高ZA27合金的耐磨性,最佳施加功率为1500W。Commercial ZA27 alloy was treated by ultrasonic vibration treatment at 500 ℃.The results show that microstructure of ultrasonic treated ZA27 alloy is composed of uniform and fine equiaxed grain.With increasing in power,average grain size is decreased from 70μm to 40μm,and weight loss is decreased from 5.6 mg to 1.3 mg.Acoustic stream effects and cavitation effects can greatly refine the microstructure of ZA27 alloy,and make η＋β phase to uniformly distribute along α grain boundary.Meanwhile,wear resistance of the ZA27 alloy can be improved obviously by power ultrasonic treatment.The optimized treating power is 1 500 W.

关 键 词：超声波 ZA27合金 显微组织 耐磨性 

分 类 号：TG146.1[一般工业技术—材料科学与工程]