摘要
采用粉末冶金法制备含w(Ti)=50%、w(B)=5%、盐类和少量助熔剂的新型钛-硼细化剂,研究了细化剂加入量和静置时间对ADC12铝合金微观组织结构和力学性能的影响。结果表明,细化剂加入30 min后,粗大树枝晶α-Al组织变得细小,对ADC12铝合金组织具有显著的细化效果,随着静置时间延长,细化效果减弱。加入质量分数为1%的该晶粒细化剂,细化效果最好,ADC12合金的抗拉强度和伸长率分别达到234.75 N/mm2和2.54%。
A new Ti-B grain refiner has been prepared by powder metallurgic method using w（Ti）50%,w（B）5%,salt and a little of flux.The influence of grain refiner adding value and holding time on microstructure and mechanical properties of ADC12 aluminum alloy has been studied.The results show that the α-Al coarse dendrite becomes finer while the holding time is 30 min after grain refiner adding,the refining effect on the microstructure of ADC12 obviously,but the refining effect decreases with holding time elongation.The optimum adding value of refiner is 1%,At this condition the tensile strength of ADC12 aluminum alloy is 234.75 N/mm2,the elongation is 2.54%.
出处
《轻合金加工技术》
CAS
北大核心
2011年第4期15-18,共4页
Light Alloy Fabrication Technology
基金
黑龙江省科技攻关重点项目(GB09A206)
关键词
ADC12铝合金
钛-硼细化剂
组织
力学性能
ADC12 aluminium alloy
Ti-B grain refiner
microstructure
mechanical property
