力學性能的影響
( 1. 河南科技大學 材料科學與工程學院，洛陽 471003；
2. 西安理工大學 材料科學與工程學院， 西安 710048；
3. 洛陽銅加工集團有限公司， 洛陽 471039)
摘 要: 探討了不同變形量對電氣化鐵路接觸線用Cu-0.42Cr-0.13Zr-0.11Y合金時效性能和力學性能的影響。 研究結果表明， 合金經950℃、 1 h固溶處理后施以不同程度冷變形， 再進行480 ℃時效處理， 比合金固溶后直接時效可顯著提高合金的電導率和顯微硬度； 隨變形量逐漸增大， 合金強度不斷升高， 抗拉強度最高可達645 MPa， 而延伸率和導電率略有降低。 當二次拉拔變形量為75.0%時， 合金的抗拉強度、 導電率和延伸率分別為605.6 MPa、 80.79%IACS和10.2%。
關鍵字: 接觸線； Cu-Cr-Zr-Y合金； 冷變形； 時效； 力學性能
（ 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
