电磁搅拌对Sr变质体育器材用铝基复合材料的影响  

Effect of electromagnetic stirring on Sr modified aluminum matrix composites for sports equipment

作　　者：姬旺勤[1] 王晓兵[2] 周亚坤[1] 赵银 Ji Wangqin;Wang Xiaobing;Zhou Yakun;Zhao Yin(School of Physical Education and Health,Xinxiang Vocational and Technical College,Xinxiang Henan 453000,China;College of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang Henan 453007,China)

机构地区：[1]新乡职业技术学院体育与健康学院,河南新乡453000 [2]河南师范大学化工学院,河南新乡453007

出　　处：《金属热处理》2023年第7期217-222,共6页Heat Treatment of Metals

摘　　要：以Al-K_(2)TiF_(6)为反应体系,体育器材用ADC12铝合金为基体,通过电磁搅拌技术制备了Sr变质Al_(3)Ti/ADC12铝基复合材料,研究了制备工艺和工艺参数对铝基复合材料的微观组织和力学性能的影响。结果表明,电磁搅拌和Sr变质处理均对Al_(3)Ti/ADC12铝基复合材料微观组织起到了细化作用,α-Al细化为球状晶,Al_(3)Ti尺寸减小到10μm,团聚现象得到改善,鱼骨状AlFeMnSi相消失,共晶Si由长针状细化为短棒状。随着搅拌电流的增大,α-Al尺寸减小,形貌越圆整。当搅拌电流为35 A时,α-Al尺寸最小,形貌最圆整,孔隙率最小,抗拉强度和伸长率最大,相比于ADC12铝合金基体分别提升了24.1%和22.1%。电磁搅拌和Sr变质对铝基复合材料起到了弥散强化和细晶强化的作用。Sr modified Al_(3)Ti/ADC12 aluminum matrix composites were prepared by electromagnetic stirring with Al-K_(2)TiF_(6) as reaction system and ADC12 aluminum alloy as matrix for sports equipment.The effects of preparation process and process parameters on microstructure and mechanical properties of aluminum matrix composites were studied.The results show that both electromagnetic stirring and Sr modification can refine the microstructure of the Al_(3)Ti/ADC12 aluminum matrix composites.The α-Al phase is refined to globular crystal,and the size of Al_(3)Ti is reduced to 10 μm,the agglomeration phenomenon of Al_(3)Ti is improved.The fishbone-like AlFeMnSi phase disappears,and the eutectic Si is refined from long needle to short rod.As the stirring current increases,the size of α-Al phase is smaller,and the morphology is rounder.When the stirring current is 35 A,the size of α-Al phase is the smallest,the morphology is the roundest,the porosity is the smallest,and the tensile strength and elongation are the largest,which are increased by 24.1% and 22.1%,respectively,compared with ADC12 aluminum alloy matrix.Electromagnetic stirring and Sr modification play a role in dispersion strengthening and fine grain strengthening of aluminum matrix composites.

关 键 词：体育器材 铝基复合材料 电磁搅拌 微观组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]