退火温度对Zr-4合金板材拉伸性能和硬度的影响  

Effects of Annealing Temperature on Tensile Properties and Hardness of Zr-4 Alloy Sheet

作　　者：胡旭坤[1,2,3] 徐滨 于军辉[1,2,3] 赵林科 张鹏飞[1,2,3] HU Xukun;XU Bin;YU Junhui;ZHAO Linke;ZHANG Pengfei(State Nuclear Baoti Zirconium Industry Co.,Ltd.;National Energy R&D Center of Nuclear Grade Zirconium Material;Shaanxi Key Laboratory of Nuclear Grade Zirconium Material)

机构地区：[1]国核宝钛锆业股份公司,陕西宝鸡721013 [2]国家能源核级锆材研发中心,陕西宝鸡721013 [3]陕西省核级锆材重点实验室,陕西宝鸡721013

出　　处：《热加工工艺》2021年第4期151-153,共3页Hot Working Technology

摘　　要：利用高温拉伸实验、显微硬度及金相组织实验,研究了退火温度对Zr-4合金板材硬度和高温拉伸性能的影响。结果表明:随着退火温度的升高,Zr-4合金板材各方向的硬度逐步降低,各方向的维氏硬度存在一定的差异。在(500~540)℃/20 min的退火温度范围内,随温度升高,Zr-4合金板材的屈服强度和抗拉强度基本无变化,而伸长率略有升高。该区间为Zr-4合金板材的消应力区间。在(540~560)℃/20 min的退火温度区间内,Zr-4合金板材的屈服强度和抗拉强度直线下降,而伸长率陡然升高,这个区间为Zr-4板材的敏感区间。在(500~560)℃/20 min的退火温度范围内,Zr-4合金板材的金相形貌为加工态组织。The effects of annealing temperature on the hardness and high temperature tensile properties of Zr-4 alloy sheet were studied by means of high temperature tensile test,microhardness and metallographic structure test.The results show that,with the increase of annealing temperature,the hardness of Zr-4 alloy sheet decreases gradually in all directions,and the Vickers hardness varies in each direction.With the increase of temperature,the yield strength and tensile strength of Zr-4 alloy sheet are almost unchanged at the annealing temperature of(500-540)℃/20 min,but the elongation increases slightly.In the annealing temperature range of(540-560)℃/20 min,the yield strength and tensile strength of Zr-4 alloy sheet decrease linearly,but the elongation increases steeply.The metallographic morphology of Zr-4 alloy sheet is deform microstructure at(500-560)℃/20 min.

关 键 词：Zr-4板材 退火温度 显微硬度 高温拉伸性能 

分 类 号：TG156.2[金属学及工艺—热处理] TG146.414[金属学及工艺—金属学]