共搜索到17707条信息，每页显示10条信息，共1771页。用时：0小时0分0秒454毫秒
辉. 新型弱电触点材料--微异型复合触点带[J]. 机电元件, 2001, 21(3): 21-26. FAN Jin-duo, LI Yong-jun, Lü Bao-guo, ZHANG Xiao-hui. New type of weak current contact material--Micro special shaped composite contact zone[J... and electrical contact properties[J]. Electronic Components & Material, 2001, 20(4): 11-13. [9] 许 军, 李 坤. 电接触的接触电阻研究[J]. 电工材料, 2011(1): 10-13. XU Jun, LI Kun. The research on resistance of electrical contact......
Effect of material parameters on stress wave propagation during fast upsetting WANG Zhong-jin(王忠金), CHENG Li-dong(程利冬) School of Materials Science and Engineering, Harbin Institute of Technology... aluminum alloy were chosen to investigate the effect of material parameters on the stress wave propagation. The results show that the stress wave propagates from top to bottom of block......
微晶,纳米晶CuCr触头材料的组织及性能 王亚平1,丁秉钧1,李秀勇2 (1.西安交通大学材料工程学院,西安710049;2.山东烟台进出口商品检验局检测中心,烟台264000) 摘要:采用机械合金化的方法制备出Cu-Cr纳米合金粉并分别在920℃, 750℃及580℃将合金粉热压烧结得到了微晶,纳米晶CuCr合金. 580℃热压可以得到致密度大于90%的纳米晶CuCr块体, 750℃及920℃热压晶粒长大到微米量级. 纳米晶CuCr材料在真空间隙中的耐电压强度接近常规致密,低氧CuCr触头材料的水平. 关键词:机械合金化; 微晶; 纳米晶; CuCr触头; 耐电压强度; [全文内容正在添加中] ......
in detail. Consequently, a novel composite material was developed which has good electrical conductivity and shock toughness, excellent sliding contact property. Keyword: copper-graphite composite material; carbon fiber; shock toughness; sliding electrical contact; Received: 1999-11-05 轨道交通用受电弓滑板要求在导电性能和自润滑性能良好的前提下有一定的抗冲击强度, 然而用传统的原材料及制备方法不能制得满足轨......
Trans. Nonferrous Met. Soc. China 29(2019) 1046-1056 Material transfer behavior of AgTiB2 contact under different contact forces and electrode gaps Yong XI1, Xian-hui WANG1, Zi-jing ZHOU1, Hang-yu..., Henan University of Science and Technology, Luoyang 471003, China Received 19 June 2018; accepted 14 January 2019 Abstract: To disclose the effect of contact force and electrode gap on the material......
料[J]. 中国有色金属学报, 2001, 11(5): 731-740. XIAN Ai-ping. Cu-Cr contact material for high power vacuum interrupters[J]. The Chinese Journal of Nonferrous Metals, 2001, 11(5): 731-740. [10] 黄锡文. 电触头材料的导电性探讨... 移[J]. 低压电器, 1998(5): 16-18. RONG Ming-zhe, ZHAO Zhi-yuan, YANG Wu. Contact material transfer of low voltage apparatus[J]. Low Voltage Apparatus, 1998(5): 16-18. [13] CHEN Z K, SAWA K. Effect of arc......
Loaded multi-tooth contact analysis and calculation for contact stress of face-gear drive with spur involute pinionTANG Jin-yuan(唐进元), LIU Yan-ping(刘艳平)(State Key Laboratory of High-performance Complex Manufacturing, School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China)Abstract:The analytical method based on "Hertz theory on normal contact of elastic......
爆炸压实CuCr合金过程中的能量与变形 纪松1,孟松鹤2,罗守靖3,陈子明1,李金平2,李垚2 (1.中国兵器工业第五二研究所,宁波分所,浙江,宁波,315041;2.哈尔滨工业大学,复合材料与结构研究所,黑龙江,哈尔滨,150001;3.哈尔滨工业大学,材料科学与工程学院,黑龙江,哈尔滨,150001) 摘要:根据爆炸冲击能分为钢管变形能和粉末压实能两部分,爆炸冲击能由钢管动能计算给出,而钢管变形能由钢管的实际变形程度决定,由此得到爆炸压实CuCr合金过程中能量与变形之间的关系.结果表明,采用爆炸压实工艺制备了相对理论密度92%以上的CuCr触头材料;随着冲击能的增加,粉末压实能同步增加,而钢管变形量和变形能几乎不变.因此,炸药量太多,粉末压实能也就太多,反而发生马赫反射,导致爆炸坯密度降低. 关键词:爆炸压实; 冲击能; 压实能; 变形能; CuCr合金; [全文内容正在......
添加Fe对CuCr触头材料显微组织的影响 孟松鹤1,李金平1 (1.哈尔滨工业大学复合材料与结构研究所,哈尔滨,150001) 摘要:采用机械合金化制粉,爆炸压实制坯,低温烧结成形制备了CuCr以及添加第三组元的CuCrFe触头材料,借助金相,扫描电镜和透射电镜等分析CuCr合金以及CuCrFe合金的显微组织,重点研究添加Fe对CuCr触头材料爆炸态和烧结态显微组织的影响.结果表明,添加Fe对CuCr机械合金化粉,CuCr合金爆炸态和烧结态的显微组织影响较大,即显著细化CuCr合金的显微组织;Fe主要固溶于Cr相中;添加Fe后CuCr合金的应变条纹和位错不仅没有消失,反而出现位错缠结的花纹,因而使CuCr合金的电导率进一步降低. 关键词:CuCr触头材料; 显微组织; 添加Fe; [全文内容正在添加中] ......
