CAJ | 학술논문

研究了Al-5 Ti-1 B细化剂对7075铝合金组织与性能的影响。结果表明：添加微量的Al-5 Ti-1 B细化剂可使7075铝合金的铸态组织从粗大的枝晶细化为细小均匀的等轴晶，随着Al-5 Ti-1 B细化剂添加量的逐渐增加，7075铝合金的晶粒平均直径逐渐减小，抗拉强度和伸长率逐渐提高。当添加0．3％的Al-5Ti-1B细化剂时，7075铝合金被细化为平均直径44．7μm的等轴晶，抗拉强度和伸长率分别提高至311 MPa和4．1％，与未添加Al-5 Ti-1 B细化剂相比，7075铝合金的晶粒平均直径下降了64．3％，抗拉强度和伸长率分别提高了13．1％和45．4％。
연구료Al-5 Ti-1 B세화제대7075려합금조직여성능적영향。결과표명：첨가미량적Al-5 Ti-1 B세화제가사7075려합금적주태조직종조대적지정세화위세소균균적등축정，수착Al-5 Ti-1 B세화제첨가량적축점증가，7075려합금적정립평균직경축점감소，항랍강도화신장솔축점제고。당첨가0．3％적Al-5Ti-1B세화제시，7075려합금피세화위평균직경44．7μm적등축정，항랍강도화신장솔분별제고지311 MPa화4．1％，여미첨가Al-5 Ti-1 B세화제상비，7075려합금적정립평균직경하강료64．3％，항랍강도화신장솔분별제고료13．1％화45．4％。
The paper highIighted the effect of AI-5Ti-1B grain refiner on microstructure and mechanicaI properties of 7075 aI oy. The resuIts indicated that as-cast microstructure of 7075 aI oy with grain refiner transformed from coarse dendrites to fine equiaxed grains;average grain diameter was decreasing,tensiIe strength and eIongation were increasing aIong with the increase in the addition of grain refiner.When grain refiner addition was 0.3%,7075 aI oy was refined to equiaxed grains with an average diameter of 44.7 μm,tensiIe strength and eIongation increased to 311 MPa and 4.1%,respectiveIy;average grain diameter of 7075 aI oy decreased by 64.3%,tensiIe strength and eIongation increased by 13.1% and 45.4% compared with 7075 aI oy without grain refiner.