摘要
研究了采用中间退火+冷变形方法制备的形变Cu-15Cr-0.1Zr原位复合材料的显微组织、抗拉强度和导电性。结果表明:铸态铬相为树枝晶,在变形过程中,铬相变成纤维状,横截面上呈卷曲薄片状;适当的中间退火能显著提高其电导率;配合适当的中间退火与冷变形,可以得到较好的强度和导电性;应变量为6.43时,采用450℃+400℃或500℃+500℃两次中间退火工艺制备的形变Cu-15Cr-0.1Zr原位复合材料具有较好的性能组合,分别为1227 MPa/64.8%IACS、1025 MPa/71.5%IACS。
The structure, strength and electrical conductivity of deformation processed Cu-15Cr-0. 2Zr in situ composites obtained by cold drawing combined with intermediate annealing were studied. The results showed that the as cast Cr phase was dendrite. Cr phase was drawn into fine ribbons during the drawing process and the Cr ribbons were curl and fold in cross section. The electrical conductivity can be obviously improved by appropriately intermediate annealing. Combination of cold drawing with appropriate intermediate annealing might result in good combinations of the tensile strength and electrical conductivity. The preferable combination of the electrical conductivity and the tensile strength of deformation processed Cu-15Cr-0. lZr in situ composites were obtained by 450 ℃-F400℃ and 500 ℃＋500 ℃ intermediate annealing technics as follows. 1 227 MPa/64. 8%IACS and 1 025 MPa/71.5% IACS.
出处
《机械工程材料》
CAS
CSCD
北大核心
2008年第11期42-45,56,共5页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(50571035)
国家“863”计划资助项目(2006AA03Z2528)
