固溶温度对QBe1.9和QBe2铍铜合金组织与性能的影响  

Effect of solution temperature on microstructure and properties of QBe1.9 and QBe2 beryllium copper alloys

作　　者：张保华 董福元 崔书辉 黄旭刚 Zhang Baohua;Dong Fuyuan;Cui Shuhui;Huang Xugang(State Key Laboratory of Rare Metal Special Materials,Northwest Rare Metal Materials Research Institute Ningxia Co.,Ltd.,Shizuishan Ningxia 753000,China;Ningxia Zhongse New Materials Co.,Ltd.,Shizuishan Ningxia 753000,China;School of Materials Science and Engineering,North Minzu University,Yinchuan Ningxia 750000,China)

机构地区：[1]西北稀有金属材料研究院宁夏有限公司稀有金属特种材料国家重点实验室,宁夏石嘴山753000 [2]宁夏中色新材料有限公司,宁夏石嘴山753000 [3]北方民族大学材料科学与工程学院,宁夏银川750000

出　　处：《金属热处理》2025年第3期96-102,共7页Heat Treatment of Metals

基　　金：国家重点研发计划(2021YFC2902304)。

摘　　要：对QBe1.9和QBe2铍铜合金进行780、790、800℃的固溶处理和320℃的时效处理,研究固溶温度对两种合金显微组织和性能的影响。结果表明:QBe1.9铍铜合金充分固溶所需的驱动力更低,晶粒尺寸相对较小,分布更均匀。随着固溶温度的升高,QBe1.9和QBe2铍铜合金固溶后的硬度、抗拉强度和导电率不断降低,断后伸长率不断提高。320℃×3 h时效后,QBe1.9铍铜合金的抗拉强度和硬度远高于QBe2铍铜合金,导电率和断后伸长率不及QBe2铍铜合金。固溶温度为800℃时,两种合金的综合性能最优,此时QBe2铍铜合金硬度仅为327 HV0.5,抗拉强度为1032.0 MPa,断后伸长率为8.9%,导电率为31.80%IACS;QBe1.9铍铜合金硬度达到404 HV0.5,抗拉强度达到1336.8 MPa,断后伸长率为7.3%,导电率为26.12%IACS。为企业提高QBe1.9铍铜合金力学性能的问题提供了解决方案。Effect of solution temperature on microstructure and properties of QBe1.9 and QBe2 beryllium copper alloys was studied by solution treatment at 780,790,800℃and aging treatment at 320℃.The results show that QBe1.9 beryllium copper alloy requires lower driving force for complete solution treatment,has smaller grain size and more uniform distribution.With the increase of solution temperature,the hardness,tensile strength and conductivity of the QBe1.9 and QBe2 beryllium copper alloys after solution treatment decrease continuously,while the elongation increases continuously.After aging at 320℃for 3 h,the tensile strength and hardness of the QBe1.9 beryllium copper alloy are much higher than that of the QBe2 beryllium copper alloy,and the conductivity and elongation are lower than that of the QBe2 beryllium copper alloy.When the solution temperature is 800℃,the two alloys exhibit the optimal comprehensive properties.The hardness of the QBe2 beryllium copper alloy is only 327 HV0.5,the tensile strength is 1032.0 MPa,the elongation is 8.9%,and the conductivity is 31.80%IACS.The hardness of the QBe1.9 beryllium copper alloy is 404 HV0.5,the tensile strength is 1336.8 MPa,the elongation is 7.3%,and the conductivity is 26.12%IACS.It provides a solution to the problem of improving the mechanical properties of the QBe1.9 beryllium copper alloy.

关 键 词：QBe1.9铍铜合金 QBe2铍铜合金 固溶温度 力学性能 

分 类 号：TG166.2[金属学及工艺—热处理]