Zr-1Nb-xY合金显微组织与耐腐蚀性能研究  

Study on Microstructure and Corrosion Resistance of Zr-1Nb-xY Alloys

作　　者：刘鑫[1] 倪晓东[1] 

机构地区：[1]北京科技大学物理系,北京100083

出　　处：《热加工工艺》2015年第24期216-218,共3页Hot Working Technology

摘　　要：为了研究热处理工艺对Zr-1Nb-xY（x=0,0.4,0.7,1.0,质量分数,%）合金显微组织与耐腐蚀性能的影响,将Zr-1Nb-xY合金样品进行580℃×10h退火、冷轧以及β相淬火三种热处理,然后进行电位极化曲线的测量,并且结合扫描电镜和X射线衍射研究其显微组织。结果表明无论采用何种热处理工艺,Zr-1Nb-xY合金的耐腐蚀性能都会随着合金元素Y含量的增加而降低。合金中形成了尺寸较大（300~700nm）含有Y元素的第二相粒子,这些第二相粒子降低了锆合金的耐腐蚀性能。To study the effect of heat treatment on mierostructure and corrosion resistance of Zr-1Nb-xY （x=0, 0.4, 0.7, 1.0wt% ）. Zr-lNb-xY alloys specimens were annealed at 580 ℃ for 10 h, cold-rolled and β-quenched respectively. Potentiodynamic polarization measurement was employed to determine the aqueous corrosion resistance of the alloys. The microstructures and the second phase particles of these specimens were analyzed and observed by SEM and XRD. The results indicate that the corrosion rate of the specimens having different heat treatment processes decreases considerably with Y content increasing. The alloying element Y is fund to be present as Y SPPs with a size of 300-700 nm.Y SPPs reduce the corrosion resistance of Zr-lNb-xY alloys.

关 键 词：热处理 耐腐蚀性能 第二相粒子 显微组织 

分 类 号：TG156.4[金属学及工艺—热处理]