多元复合稀土钨电极的制备及其焊接特性研究  

Study on Welding Performance and Fabrication of Tungsten Electrode Doped with Non- radiating Rare Earths Oxide

作　　者：崔云涛[1,2,3] 李炳山[1,2,3] 彭鹰[1,2,3] 王芦燕[1,2,3] 杨建参[4] 

机构地区：[1]北京矿冶研究总院,北京100160 [2]北矿新材科技有限公司,北京100160 [3]北京市工业部件表面强化与修复工程技术研究中心,北京102206 [4]北京工业大学,北京100124

出　　处：《热喷涂技术》2013年第2期65-68,共4页Thermal Spray Technology

基　　金：科技支撑课题(2012BAE06B02)

摘　　要：本论文采用机械混合法结合二段氢气还原成功制备出稀土掺杂钨粉。还原后的稀土钨粉冷等静压压制成钨棒后,采用中频感应烧结法制备出稀土钨电极。实验结果表明,制备的稀土钨粉,由于稀土元素的存在,降低了钨粉的粒度。稀土元素以稀土氧化物的形式存在。与垂熔法相比,采用中频感应烧结后的钨棒机械加工性能优异。电极成品率提高了5%,能耗则降低了60%以上。并且制成电极后的焊接性能得到了进一步提高。Rare earth oxide doped tungsten powders have been prepared by mechanical mixing combined with two-step hydrogen reduction in this paper. Tungsten billets which were pressed by isostatic compaction method using the doped tungsten powders, were sintered by medium-frequency induction sintering. The experimental results show that RE elements distribute evenly in the doped powders. Comparing to vertical sintering process, the tungsten billets that sintered by medium-frequency induction sintering have the better machining property. The yield rate of electrode increased by 5%, where the energy consumption decreased more than 60%. The welding performance of the fabricated electrode is further improved.

关 键 词：稀土 钨电极 中频感应烧结 焊接性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]