CAJ | 학술논문

制备了Cu-10Cr和Cu-10Cr-0.4Zr合金,并经冷变形形成了原位复合材料,观察了Zr的添加对合金铸态组织、复合材料的纤维形貌,研究了Zr的添加和冷变形率对拉伸强度以及导电率的影响.研究表明,在Cu-10Cr合金中添加的0.4%Zr,Cr析出相的直径由15～80μm细化到10～20μm;在相同的冷拔应变下,Cu-10Cr-0.4Zr复合材料较Cu-10Cr材料具有了更高的基体晶格阻力、更加细小均匀的纤维相以及纤维间距,使得Cu-10Cr-0.4Zr复合材料的强度更高.当冷拔应变达到6.2时,Cu-10Cr-0.4Zr原位复合材料抗拉强度高达1089MPa,而Cu-10Cr材料的抗拉强度仅为887MPa.在相同冷拔应变下,Cu-10Cr材料的导电率比Cu-10Cr-0.4Zr材料中的导电率略高.随着材料冷拔应变的增加,决定复合材料电阻率的基体材料内位错散射电阻转变成界面散射电阻,复合材料的电导率逐渐下降.
제비료Cu-10Cr화Cu-10Cr-0.4Zr합금,병경랭변형형성료원위복합재료,관찰료Zr적첨가대합금주태조직、복합재료적섬유형모,연구료Zr적첨가화랭변형솔대랍신강도이급도전솔적영향.연구표명,재Cu-10Cr합금중첨가적0.4%Zr,Cr석출상적직경유15～80μm세화도10～20μm;재상동적랭발응변하,Cu-10Cr-0.4Zr복합재료교Cu-10Cr재료구유료경고적기체정격조력、경가세소균균적섬유상이급섬유간거,사득Cu-10Cr-0.4Zr복합재료적강도경고.당랭발응변체도6.2시,Cu-10Cr-0.4Zr원위복합재료항랍강도고체1089MPa,이Cu-10Cr재료적항랍강도부위887MPa.재상동랭발응변하,Cu-10Cr재료적도전솔비Cu-10Cr-0.4Zr재료중적도전솔략고.수착재료랭발응변적증가,결정복합재료전조솔적기체재료내위착산사전조전변성계면산사전조,복합재료적전도솔축점하강.
The Cu-10Cr alloy, Cu-10Cr-0. 4Zr alloy and the in-situ composite based on the alloy were prepared. Microstructures of as-cast, evolution of filaments, strength and electrical conductivity of Cu-10Cr and Cu-10Cr-0. 4Zr in-situ composites have been investigated. The results show that the addition of 0. 4wt%Zr in the Cu-10wt%Cr gives birth to smaller as-cast Cr dendrites, their diameters were reduced from 15-80μm to 10-20μm;at the same draw ratio, Cu-10Cr-0. 4Zr composites have larger intrinsic friction stress, finer filaments and spacing between the filaments than Cu-10Cr composites, and the ultimate strength of Cu-10Cr-0. 4Zr composites reaches 1089MPa at draw ratio of η=6. 2, however that of the same processed Cu-10Cr is only 887MPa; and at the same draw ratio, the electrical conductivity of Cu-10Cr composites is little higher than that of Cu-10Cr-0. 4Zr composites, the decreasing electrical conductivity is caused by the transition of resistivity contribution from dislocation scattering to interface scattering in the Cu matrix.