摘要
为探讨不同淬火温度对核燃料包壳管Zr-4合金力学性能的影响.本文分析了Zr-4合金的显微组织,通过对再结晶退火态的Zr-4合金进行不同温度淬火及回火热处理,在不同热处理状态下对试样进行室温环向拉伸试验,分析对比了试样的拉伸力学性能,并对拉伸后的试样进行断口扫描,分析断裂机理.试验结果表明:包壳管Zr-4合金在980℃淬火后晶粒弦长为145.62μm,相比920℃、950℃的弦长增大,其抗拉强度为740MPa,屈服强度为649MPa.淬火后断口类型属解理脆性断裂.
The microstruetures and properties of Zr-4 alloy after heat-treatment in different quenching temperatures were studied. The tensile properties of tubes of different heat-treatment were studied by means of static tensile test at room temperature. The fracture mechanisms of Zr-4 tubes after tensile test were studied by SEM. The result showed that the grain chord length after 980 ~C quenching was 145.62 μm and was longer than that at other temperatures. The tensile strength was 740 MPa, and the yield strength was 649 MPa after quenching at 980 ℃. The tensile fracture of Zr-4 alloys occured in the manner of cleavage brittle fracture at room temperature according to the SEM fracture surface observation.
出处
《西安工业大学学报》
CAS
2013年第12期993-999,共7页
Journal of Xi’an Technological University
基金
陕西省自然基金项目(2011JM7006)
关键词
ZR-4合金
淬火温度
显微组织
拉伸性能
Zr-4 alloy
quenching temperature
microstructure
tensile properties
作者简介
高巍（1977-），男，西安工业大学副教授，主要研究方向为金属热强材料和功能材料．E-mail：eifa@sina．com．
