( 1. 西安交通大學(xué) 材料科學(xué)與工程學(xué)院， 西安 710049；
2. 河南科技大學(xué) 材料科學(xué)與工程學(xué)院，洛陽 471039；
3. 洛陽銅加工廠， 洛陽 471039)
摘 要: Cu-Ag-Cr合金是一種高強(qiáng)度高電導(dǎo)新型材料。采用真空熔煉的方法制備了Cu-Ag-Cr合金，經(jīng)合適的工藝處理后， 在電導(dǎo)率基本上不降低的前提下， 能顯著提高合金的強(qiáng)度和硬度， 抗拉強(qiáng)度達(dá)到529MPa， 電導(dǎo)率為92.11%（IACS）， 基本滿足對銅合金高強(qiáng)高導(dǎo)的性能要求。 在同樣條件下， 與Cu-Ag合金相比， 其強(qiáng)度和硬度的提高主要是由共格析出強(qiáng)化造成，由于析出相尺寸較大， 以O(shè)rowan機(jī)制強(qiáng)化，強(qiáng)化效應(yīng)與采用Orowan強(qiáng)化機(jī)制計算的結(jié)果非常接近。
關(guān)鍵字: Cu-Ag-Cr合金；強(qiáng)化機(jī)制； 高強(qiáng)度； 高電導(dǎo)
high-conductivity Cu-0.1Ag-0.11Cr alloy
ZHENG Mao-sheng1,ZHOU Gen-shu1, LOU Hua-fen3
（ 1. School of Materials Science and Engineering,
Xi′an Jiaotong University, Xi′an 710049, China;
2. School of Materials Science and Engineering,
Henan University of Science and Technology,
Luoyang 471039, China;
3. Luoyang Copper (Group) Co Ltd,
Luoyang 471039, China）
Abstract: Cu-Ag-Cr alloy with high-strength and high conductivity is a new wire material. By means of a vacuum induction melting, Cu-Ag-Cr alloy was produced. After proper heat-treatment processes, the strength and hardness of the alloy were remarkably improved while the conductivity only had a little decrease. Tensile strength is enhanced to about 529MPa and the conductivity remains 92.11%(IACS) which shows that the alloy can meet the demand of high-strength and high conductivity. Compared with Cu-Ag alloy under the same test conditions, the coherent precipitation hardening is proved to be the major factors that improve the strength and hardness of the alloy. Because of the larger sizes of the precipitated phase, an Orowan strengthening mechanism is operated. The degree of coherent strengthening is almost identical with the calculated one by Orowan strengthening theory.
Key words: Cu-Ag-Cr alloy; strengthening mechanism; high-strength; high conductivity
