Cu-Fe-Cr-Ni原位复合材料的结构与性能  

Structure and properties of Cu-Fe-Cr-Ni in-situ composites

作　　者：孟永强[1] 孙世清[1] 毛磊[1] 刘宗茂[1] 

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050054

出　　处：《河北科技大学学报》2006年第4期297-301,共5页Journal of Hebei University of Science and Technology

基　　金：河北省自然科学基金资助项目(503372);河北科技大学科研基金资助项目(XL2005001)

摘　　要：通过感应熔炼、浇铸、热轧和冷拔制备了Cu-Fe-Cr-Ni原位复合材料,采用XRD,SEM和TEM研究了Ni元素和拉拔变形量对其显微结构的影响。用拉伸实验测试了材料的强度,用标准四探针方法测量了材料的电阻。在Cu-Fe-Cr-Ni合金铸锭中,bcc结构的第2相为近球形颗粒形态,经过后续的变形加工,颗粒演变成了近圆形横截面的纤维。对Cu-Fe-Cr-Ni原位复合材料只进行了1次550℃中间退火,就可以获得较高的拉拔变形量(η=5.32),表明Ni的加入可以改善原位复合材料的塑性。随着拉拔变形量的增大,Cu-Fe-Cr-Ni原位复合材料的强度增加,电导率下降。Cu-Fe-Cr-Ni in-situ composite wires were manufactured by inductive melting,casting.hot rolling and cold drawing. The effects of Ni element and drawn strains on microstructures were investigated by XRD, SEM and TEM. The evaluation of mechanical strength of wires was carried out on a tensile test machine, and electrical resistivity measurements were made by using a standard four-probe technique. In the as-cast ingot of Cu-Fe-Cr-Ni alloy,the secondary phases（bee structure）appears to be array of nearly spherical particles. After subsequent deformation processes, the particles formed nearly circular morphology on the cross-section of filaments in the Cu-Fe-Cr-Ni in-situ composites. A drawing strain of 5.32 was achieved only with once intermediate annealing at 550 ℃ ,suggesting the addition of Ni can improve the ductility of Cu-Fe-Cr-Ni in-situ composites. With increasing drawn strains of Cu-Fe-Cr-Ni in-situ composites,the strength increases and the electrical conductivity decreases.

关 键 词：原位复合材料 Ni元素 塑性 强度 电导率 

分 类 号：TB323[一般工业技术—材料科学与工程]