CAJ | 학술논문

采用3种不同的工艺(直接在450℃下进行时效处理；80%冷轧，然后在450℃下进行时效处理；600℃/8 h高温预时效+80%冷轧+780℃/2 min+450℃/16 h终时效)对固溶处理后的Cu-2.0Ni-0.34Si-Mg合金进行形变热处理，研究形变热处理工艺对该合金的组织与硬度及电导率的影响。结果表明：采用第3种工艺对合金进行形变热处理，由于其中的短时高温预处理可以获得溶质原子充分固溶的过饱和固溶体，因此终时效后的合金具有最佳的综合性能，显微硬度为180 HV，相对电导率为49.8% IACS，伸长率为13%。合金的平均晶粒尺寸约为20μm，主要析出强化相为δ-Ni2Si。
채용3충불동적공예(직접재450℃하진행시효처리；80%랭알，연후재450℃하진행시효처리；600℃/8 h고온예시효+80%랭알+780℃/2 min+450℃/16 h종시효)대고용처리후적Cu-2.0Ni-0.34Si-Mg합금진행형변열처리，연구형변열처리공예대해합금적조직여경도급전도솔적영향。결과표명：채용제3충공예대합금진행형변열처리，유우기중적단시고온예처리가이획득용질원자충분고용적과포화고용체，인차종시효후적합금구유최가적종합성능，현미경도위180 HV，상대전도솔위49.8% IACS，신장솔위13%。합금적평균정립척촌약위20μm，주요석출강화상위δ-Ni2Si。
Three deformation heat treatment conditions including 450℃ aging treatment, 80% cold rolling+450℃ aging treatment, 600℃/8 h aging treatment+80% cold rolling+780℃/2 min solution treatment +450℃/16 h aging treatment for Cu-2.0Ni-0.34Si-Mg alloy were studied. The effect of heat treatment on microstructure, micro-hardness and electrical conductivity of Cu-2.0Ni-0.34Si-Mg alloy was explored. The results show that with the solution treatment (780℃/2 min) of the third condition, the solute atoms dissolve into the matrix and the copper alloy becomes supersaturated solid solution again because of short time and high temperature pre-treatment, which determines that this condition is preferable with micro-hardness of 180 HV, electrical conductivity of 49.8% and elongation of 13%, respectively. The average grain size is about 20μm, and the main strengthening phase isδ-Ni2Si.