采用力学性能和电导率测试及透射电镜观察等方法,研究了不同时效工艺对Cu-1.0Cr-0.2Zr合金组织和性能的影响.结果表明:合金在一级时效工艺(960℃固溶2h+60%冷变形+450℃时效4h)下有很强的时效强化效应,抗拉强度和屈服强度分别为527.0MPa和487.0MPa,伸长率为12.3%,导电率为82.0%IACS,软化温度为520℃;采用二级时效工艺(960℃固溶2h+60%冷变形+450℃时效4h+60%冷变形+450℃时效5h),合金保持较高的电导率的同时,合金的强度及软化温度得到较大提高,抗拉强度和屈服强度分别为565.4MPa和524.1MPa,伸长率为9.8%,电导率为80.1%IACS,软化温度为560℃.显微组织分析表明,高强度主要来源于预冷变形引起的亚结构强化和弥散相的析出强化.二级时效工艺细化了析出相的尺寸,析出的弥散质点对基体的回复和再结晶阻碍作用强烈,使合金具有很高的软化温度.
参考文献
| [1] | 田荣璋.铜及铜合金材料手册[M].长沙:中南大学出版社,2002 |
| [2] | Batra I S;Dey G K;Kulkarni U D et al.Precipitation in a Cu-Cr-Zr alloy[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2003,356:32-36. |
| [3] | HO J. RYU;HYUNG K. BAIK;SOON H. HONG .Effect of thermomechanical treatments on microstructure and properties of Cu-base leadframe alloy[J].Journal of Materials Science,2000(14):3641-3646. |
| [4] | Tu J P;Qi W X;Yang Y Z et al.Effect of aging treatment on the electrical sliding wear behaviour of Cu-Cr-Zr alloy[J].Wear,2001,249(10-11):1021-1027. |
| [5] | 宋练鹏,尹志民,李娜娜,张伟.不同处理工艺对Cu-Cr-Zr-Mg合金组织与性能的影响[J].稀有金属,2004(01):122-126. |
| [6] | Mu SG;Guo FA;Tang YQ;Cao XM;Tang MT .Study on microstructure and properties of aged Cu-Cr-Zr-Mg-RE alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):235-240. |
| [7] | 曹育文 .引线框架用高强度高导电铜合金研究[D].清华大学,1999. |
| [8] | HO J. RYU;HYUNG K. BAIK;SOON H. HONG .Effect of thermomechanical treatments on microstructure and properties of Cu-base leadframe alloy[J].Journal of Materials Science,2000(14):3641-3646. |
| [9] | Tang N Y;Taplin D M;Dunlop C L .Precipitation and aging in high-conductivity Cu-Cr alloys with additions of zirconium and magnesium[J].Journal of Materials Science and Technology,1985,1:270-275. |
| [10] | Qi WX.;Tu JP.;Liu F.;Yang YZ.;Wang NY.;Lu HM.;Zhang XB.;Guo SY. Liu MS. .Microstructure and tribological behavior of a peak aged Cu-Cr-Zr alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):89-96. |
| [11] | Croza J R;Gibeling J C .Principles of particle selection for dispersion-strengthened copper[J].Materials Science and Engeering A,1993,171:115-125. |
| [12] | Noguchi K .Precipitation and recrystallization behavior and texture of Cu-Cr-Zr alloy sheets[J].Journal of the Japan Copper and Brass Regearch Association,1993,32:115-120. |
| [13] | Su JH;Dong QM;Liu P;Li HJ;Kang BX .Research on aging precipitation in a Cu-Cr-Zr-Mg alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):422-426. |
| [14] | 方俊鑫;陈栋.固体物理[M].北京:高等教育出版社,1981:156. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%