CAJ | 학술논문

以 Cu-0．18％(质量分数)Al 合金粉末为原料、Cu2 O 为氧化剂,采用内氧化法制备 Al2 O 3弥散铜合金粉末,采用高速压制(HVC)对粉末进行成形,经氢气中960~1080℃烧结制备弥散强化铜合金,研究合金粉末的 HVC 成形效果和烧结温度对合金致密度、硬度、导电率和压缩强度等性能的影响.结果表明,HVC 成形 Al2 O 3弥散铜合金粉能获得良好的成形效果,压坯密度达到8．71 g/cm3(98．4％致密度).与压坯相比,烧结后合金的致密度并无明显变化,但其导电率显著提升,硬度有所降低,压缩强度升高.随烧结温度的升高,合金的导电率有所升高,硬度略有降低,压缩强度基本保持恒定.经 1040~1080℃烧结制备合金的导电率、硬度分别达到80％ IACS 和77 HRB以上,压缩强度达到450 MPa,能基本满足点焊电极的实际应用需求.
이 Cu-0．18％(질량분수)Al 합금분말위원료、Cu2 O 위양화제,채용내양화법제비 Al2 O 3미산동합금분말,채용고속압제(HVC)대분말진행성형,경경기중960~1080℃소결제비미산강화동합금,연구합금분말적 HVC 성형효과화소결온도대합금치밀도、경도、도전솔화압축강도등성능적영향.결과표명,HVC 성형 Al2 O 3미산동합금분능획득량호적성형효과,압배밀도체도8．71 g/cm3(98．4％치밀도).여압배상비,소결후합금적치밀도병무명현변화,단기도전솔현저제승,경도유소강저,압축강도승고.수소결온도적승고,합금적도전솔유소승고,경도략유강저,압축강도기본보지항정.경 1040~1080℃소결제비합금적도전솔、경도분별체도80％ IACS 화77 HRB이상,압축강도체도450 MPa,능기본만족점한전겁적실제응용수구.
Al2 O 3 dispersion copper alloy powder was made from Cu-0.18wt%Al alloy powder and oxidant Cu2 O powder through internal oxidation.Then the powder was pressed by high-velocity compaction (HVC)followed by sintering in hydrogen at 960-1 080 ℃ to prepare dispersion strengthened copper alloy.The forming ability of the alloy powder by HVC and the effects of sintering temperature on relative density (RD),hardness,electrical conductivity as well as compressive strength were investigated.The results show that HVC pressing Al2 O 3 dis-persion copper alloy powder could achieve good forming ability,and the green density reaches 8.72 g/cm3 (98.4%RD).Compared with the compact,RD of sintered alloy has no obvious change,while the electrical con-ductivity significantly improves,hardness decreases,and compressive strength increases.With increasing the sintering temperature, the electrical conductivity increases, hardness slightly decreases and compressive strength almost keeps constant.For the as-prepared alloy by sintering at 1 040-1 080 ℃,the electrical conduc-tivity and hardness was beyond 80% IACS and 77 HRB,respectively,and compressive strength reaches 453 MPa.These properties of the alloy could basically meet the requirement of the practical application used as spot welding electrodes.