CAJ | 학술논문

通过光学显微镜、维氏硬度计、涡流电导仪、X射线衍射仪、透射电子显微镜等仪器设备对Cu-6.0Ni-1.4Si-0.15Mg-0.1Cr合金的组织结构和性能进行了表征与测试.结果表明：合金铸态组织为发达的树枝晶组织，并可分为白亮的枝晶区、灰色的中间过渡区及非平衡凝固相粒子.非平衡凝固相主要为δ-Ni2Si和β-Ni3Si.合金主要的强化机制为时效析出强化，主要强化相为δ-Ni2Si.合金经过适当的形变热处理后，硬度为353 HV，抗拉强度为1010 MPa，屈服强度为930 MPa，伸长率为3.8%，电导率为29.7%IACS.
통과광학현미경、유씨경도계、와류전도의、X사선연사의、투사전자현미경등의기설비대Cu-6.0Ni-1.4Si-0.15Mg-0.1Cr합금적조직결구화성능진행료표정여측시.결과표명：합금주태조직위발체적수지정조직，병가분위백량적지정구、회색적중간과도구급비평형응고상입자.비평형응고상주요위δ-Ni2Si화β-Ni3Si.합금주요적강화궤제위시효석출강화，주요강화상위δ-Ni2Si.합금경과괄당적형변열처리후，경도위353 HV，항랍강도위1010 MPa，굴복강도위930 MPa，신장솔위3.8%，전도솔위29.7%IACS.
Microstructure and properties of the Cu-6.0Ni-1.4Si-0.15Mg-0.1Cr alloy are studied by optical microscope, X-ray diffractometer and transmission electron microscope observation, and by Vickers hardness tester, eddy-current electrical conductivity measurement. Results show that the developed dendrite which can be divided into dendrite area, the middle transition region and non-equilibrium solidification phase particles, appears in the casting ingot. The non-equilibrium solidification phases are δ-Ni2Si and β-Ni3Si. The main strength mechanism for designed alloy is precipitation strengthening and the strengthening phases are δ-Ni2Si. After appropriate thermo-mechanical treatment, the hardness of the alloy can be 353 HV, tensile strength can reach 1 010 MPa, and yield strength is 930 MPa with enlogation being 3.8 % and electrical conductivity being 29.7%IACS.