力学性能的影响
( 1. 河南科技大学 材料科学与工程学院，洛阳 471003；
2. 西安理工大学 材料科学与工程学院， 西安 710048；
3. 洛阳铜加工集团有限公司， 洛阳 471039)
摘 要: 探讨了不同变形量对电气化铁路接触线用Cu-0.42Cr-0.13Zr-0.11Y合金时效性能和力学性能的影响。 研究结果表明， 合金经950℃、 1 h固溶处理后施以不同程度冷变形， 再进行480 ℃时效处理， 比合金固溶后直接时效可显著提高合金的电导率和显微硬度； 随变形量逐渐增大， 合金强度不断升高， 抗拉强度最高可达645 MPa， 而延伸率和导电率略有降低。 当二次拉拔变形量为75.0%时， 合金的抗拉强度、 导电率和延伸率分别为605.6 MPa、 80.79%IACS和10.2%。
关键字: 接触线； Cu-Cr-Zr-Y合金； 冷变形； 时效； 力学性能
（ 1. School of Materials Science and Engineering,
Henan University of Science and Technology, Luoyang 471003, China;
2. School of Materials Science and Engineering,
Xi'an University of Technology, Xi'an 710048, China;
3. Luoyang Copper Working Group Co. Ltd., Luoyang 471039, China）
Abstract: The influences of various cold working on properties of Cu-0.42Cr-0.13Zr-0.11Y alloy contact wire for electrified railway were studied. The results show that the tested alloy after solution at 950 ℃ for 1 h, various deformation and aging at 480 ℃, can attain higher electrical conductivity and microhardness than those of the alloy in solution-aged condition. The strength of the tested alloy increases with the increase of cold working, and the highest tensile strength value is 645 MPa, while the elongation and electrical conductivity drop a little. The values of tensile strength, electrical conductivity and elongation are 605.6 MPa, 80.79%IACS and 10.2% when the deformation of second drawing increases to 75.0%.
Key words: contact wire; Cu-Cr-Zr-Y alloy; cold working; aging; mechanical properties
