(1. 清華大學(xué) 機(jī)械工程系，北京 100084;
2. 金堆城鉬業(yè)集團(tuán)有限公司，西安 710075)
摘 要: 分析了中間合金微細(xì)粉末熔體處理工藝和雙向電磁攪拌工藝中，Al-5Ti-B合金粉末粒度、粉末加入量、加入溫度、靜置時(shí)間、中間合金加入順序、單向旋轉(zhuǎn)時(shí)間、電源頻率、澆注溫度和攪拌時(shí)間等工藝參數(shù)對(duì)A356合金半固態(tài)漿料的組織和制備效率的影響規(guī)律及其原因，開(kāi)發(fā)出適合于鋁合金的熔體處理＋雙向電磁攪拌半固態(tài)漿料復(fù)合制備技術(shù)。結(jié)果表明：該技術(shù)可在20~25 s內(nèi)制備出α(Al)的形狀因子約為0.85、晶粒尺寸為70~80 μm(空冷尺寸)的A356合金半固態(tài)漿料。
關(guān)鍵字: Al-5Ti-B微細(xì)粉末；A356合金；漿料快速制備；熔體處理；雙向電磁攪拌
treatment and reversible electromagnetic stirring
（1. Department of Mechanical Engineering, Tsinghua University,Beijing 100084, China;
2. Jinduicheng Molybdenum Group Co. Ltd., Xi’an 710075, China）
Abstract:The influences and reasons of the processing parameters of melt treatment and electromagnetic stirring, namely particle size of Al-5Ti-B alloy powder, addition level, addition temperature, holding time, addition sequence of master alloys, one-way rotation time, power frequency, pouring temperature, on the microstructure of semi-solid A356 alloy slurry and the preparation efficiency were systematically studied. Based on the results, a multiple semi-solid Al alloy slurry preparation technology of melt treatment and reversible electromagnetic stirring was explored. The results show that by this technology, semi-solid A356 alloy slurry with α(Al) shape factor of about 0.85 and particle size of 70−80 μm (in air-cooling state) could be prepared in 20−25 s.
Key words: Al-5Ti-B alloy powder; A356 alloy; rapid slurry preparation technology; melt treatment; reversible electromagnetic stirring
