预变形对应变诱导熔化激活法制备Al-Zn-Mg-Cu合金显微组织与力学性能的影响（英文）

发布时间：2018-05-02 11:14

本文选题：铝合金 + 铸造　；参考：《Transactions of Nonferrous Metals Society of China》2016年09期

【摘要】：研究Al-8B晶粒细化剂对应变诱导熔化激活法制备的Al-12Zn-3Mg-2.5Cu合金显微组织与力学性能的影响。并在300°C对合金进行预变形量为60%的热加工。预变形后,将合金加热至介于固相线和液相线的某一温度(500,550和590°C),并保温不同时间(10,20和40 min)。应变诱导熔化激活法可得到球状α(Al)晶粒。采用光学显微镜和扫描电子显微镜观察细化和未细化合金的显微组织。结果表明,应变诱导熔化激活制备过程中在550°C下保温10 min,可以得到满意的显微组织。经T6热处理后,采用3.75%Al-8B细化和应变诱导熔化激活法制备的合金的平均拉伸强度分别从278 MPa增加至585 MPa,252MPa增加至560 MPa。SIMA合金的抗拉强度比B细化合金的抗拉强度低。
[Abstract]:The effect of Al-8B grain refiner on the microstructure and mechanical properties of Al-12Zn-3Mg-2.5Cu alloy prepared by strain induced melting activation method was studied. The alloy was predeformed at 300 掳C by 60% hot working. After pre-deformation, the alloy was heated to a temperature of 500550 and 590 掳C ~ (-1) between the solid and liquid lines, and the alloy was heated for 10 ~ 20 and 40 min ~ (-1) at different time. Spheroidal 伪 -Al grains can be obtained by strain induced melting activation method. The microstructure of the alloy was observed by optical microscope and scanning electron microscope. The results show that satisfactory microstructure can be obtained by holding at 550 掳C for 10 min during the preparation process of strain induced melting activation. After T6 heat treatment, the average tensile strength of the alloy prepared by 3.75%Al-8B refinement and strain induced melting activation method was increased from 278 MPa to 585 MPA, respectively. The tensile strength of the alloy increased to 560 MPa.SIMA was lower than that of the B refined alloy.
【作者单位】： School
【分类号】：TG146.21;TG292

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