粉末冶金材料科学与工程
粉末冶金材料科學與工程
분말야금재료과학여공정
POWDER METALLURGY MATERIALS SCIENCE AND ENGINEERING
2015年
3期
419-424
,共6页
余亚岚%袁楠%江丹露%申文浩%单娜%仲洪海%蒋阳
餘亞嵐%袁楠%江丹露%申文浩%單娜%仲洪海%蔣暘
여아람%원남%강단로%신문호%단나%중홍해%장양
受电弓滑板%铜基粉末冶金材料%电阻率%摩擦性能%冲击韧性
受電弓滑闆%銅基粉末冶金材料%電阻率%摩抆性能%遲擊韌性
수전궁활판%동기분말야금재료%전조솔%마찰성능%충격인성
pantograph slider%copper matrix P/M materials%electrical resistivity%friction properties%impact toughness
采用粉末冶金法,在N2和H2混合气氛保护下烧结,制备以石墨和镍等为主要合金元素的新型铜基受电弓滑板材料,研究石墨含量对该材料电阻率、冲击韧性、硬度、摩擦因数和磨损性能的影响,以及镍含量对其硬度和冲击韧性的影响,并分析烧结过程中形成的弥散相和固溶体对材料的增强增韧效果。结果表明:石墨对材料密度影响较明显,石墨含量越高,材料的电阻率越大,冲击韧性越小,并且摩擦因数越小,减磨和耐磨性越好,但石墨含量超过5%时材料性能下降;随镍含量增加,受电弓滑板材料的硬度和冲击韧性都提高,但电阻率增大。石墨和镍的含量(质量分数)均为3%时,材料的电阻率为0.22μ?·m,硬度为HB60,冲击韧性为7.1 J/cm2,摩擦因数为0.19,能满足铜基受电弓滑板的使用要求。
採用粉末冶金法,在N2和H2混閤氣氛保護下燒結,製備以石墨和鎳等為主要閤金元素的新型銅基受電弓滑闆材料,研究石墨含量對該材料電阻率、遲擊韌性、硬度、摩抆因數和磨損性能的影響,以及鎳含量對其硬度和遲擊韌性的影響,併分析燒結過程中形成的瀰散相和固溶體對材料的增彊增韌效果。結果錶明:石墨對材料密度影響較明顯,石墨含量越高,材料的電阻率越大,遲擊韌性越小,併且摩抆因數越小,減磨和耐磨性越好,但石墨含量超過5%時材料性能下降;隨鎳含量增加,受電弓滑闆材料的硬度和遲擊韌性都提高,但電阻率增大。石墨和鎳的含量(質量分數)均為3%時,材料的電阻率為0.22μ?·m,硬度為HB60,遲擊韌性為7.1 J/cm2,摩抆因數為0.19,能滿足銅基受電弓滑闆的使用要求。
채용분말야금법,재N2화H2혼합기분보호하소결,제비이석묵화얼등위주요합금원소적신형동기수전궁활판재료,연구석묵함량대해재료전조솔、충격인성、경도、마찰인수화마손성능적영향,이급얼함량대기경도화충격인성적영향,병분석소결과정중형성적미산상화고용체대재료적증강증인효과。결과표명:석묵대재료밀도영향교명현,석묵함량월고,재료적전조솔월대,충격인성월소,병차마찰인수월소,감마화내마성월호,단석묵함량초과5%시재료성능하강;수얼함량증가,수전궁활판재료적경도화충격인성도제고,단전조솔증대。석묵화얼적함량(질량분수)균위3%시,재료적전조솔위0.22μ?·m,경도위HB60,충격인성위7.1 J/cm2,마찰인수위0.19,능만족동기수전궁활판적사용요구。
A new type of copper-based pantograph slider materials mainly composited of graphite and nickel, was successfully prepared by sintering specimen in an atmosphere of N2 and H2 gas mixture. The effect of graphite content on electrical resistivity, impact toughness, hardness, friction coefficient and wear performance and the effect of nickel content on impact toughness, hardness were studied. The toughening and strengthening effects of solid solution and dispersed phase were also analyzed. The results show that the higher graphite content can cause the greater resistivity, the smaller impact toughness and friction coefficient, and the better anti-friction and wear performance. But the performance of material decreases when the graphite content is more than 5%. Moreover, the higher the nickel content can induce the greater hardness, the bigger impact toughness and the greater resistivity. When the content of graphite and nickel both are 3%, the performance with electrical resistivity of 0.22μ?·m, hardness of HB60, impact toughness of 7.1 J/cm2, and friction coefficient of 0.19 can be obtained, which can meet the basic requirements of national standards.