在多向锻造过程中温度场对7075铝合金组织的影响
|
摘要
运用Deform 3D软件,研究了7075铝合金多向锻造过程中实际情况难以测量的参数对锻件成型质量的影响。以温度为变量,采用等温锻造和变温锻造对相同尺寸的毛坯进行锻造,初始的锻造温度为450℃,对比研究了两种锻造过程中毛坯所受到的应力、金属流速、金属流线以及晶粒大小等参数的差异。结果表明,7075铝合金变温锻造表面容易产生撕裂现象,等温锻造金属流线更好,组织更加均匀。镦粗和拔长的次数足够多,均可以达到晶粒细化效果,等温锻造晶粒尺寸更小,分布更均匀。
The Deform 3D software was used to study the influence of the parameters that were difficult to measure in the forging process of 7075 aluminum alloy. With temperature as variables, the isothermal forging and forging blank of the same size forging, the initial forging temperature was 450 ℃, the differences of stress, metal flow rate, metal flow line and grain size were studied in the two forging processes. The results show that the surface of 7075 aluminum alloy is prone to tear, and the isothermal forging line is better and the structure is more uniform. The number of upsetting and drawing is enough to achieve the grain refining effect, the isothermal forging grain size is smaller and more uniform distribution.
The Deform 3D software was used to study the influence of the parameters that were difficult to measure in the forging process of 7075 aluminum alloy. With temperature as variables, the isothermal forging and forging blank of the same size forging, the initial forging temperature was 450 ℃, the differences of stress, metal flow rate, metal flow line and grain size were studied in the two forging processes. The results show that the surface of 7075 aluminum alloy is prone to tear, and the isothermal forging line is better and the structure is more uniform. The number of upsetting and drawing is enough to achieve the grain refining effect, the isothermal forging grain size is smaller and more uniform distribution.
引文
[1]韩冰.7075z铝合金高温塑性变形行为研究[D].广州:广东工业大学,2003.
[2]万菊林,孙新军,顾家琳,等.Al-Cu-Mg-Zn-Cr合金热扭转变形中连续动态再结晶机理[J].金属学报,1999,35(10):1031-1035.
[3]Woei-Shyan Lee,Wu-Chung sue,Chi-Feng Lin,Chin-Jyi Wu.The Strain Rate and Temperature Dependence of Dynamic Impact Properties of 7075 Aluminum Alloy[J].Journal of Materials Processing Technology,2000,100(1-3):116-122.
[4]赵金凤.铸造工艺对铝合金组织及性能的影响[J].铸造技术,2015,36(8):2091-2092.
[5]张小明,张延杰,田峰.多向锻造对改善7075铝合金性能的作用[J].稀有金属材料与工程,2003,32(5):372-374.
[6]张昌明,张会.采用Deform-3D对2A12铝合金锻造变形的模拟研究[J].锻压技术,2009,34(6):140-142.
[7]何春霞,秦国帅,吴素珍,等.热处理工艺对7075铝合金性能的影响[J].热加工工艺.2016,45(12):204-206.
[8]梁信.7085铝合金等温多向锻及有限元模拟研究[D].长沙:中南大学,2011.
[9]沈健,唐京辉,谢水生.AL-Zn-Mg合金的热变形组织演化[J].金属学报,2000,10(36):1033-1036.
[10]周建.7075铝合金在锻造过程中显微组织的演变和工艺模拟[D].沈阳:东北大学,2003.
[2]万菊林,孙新军,顾家琳,等.Al-Cu-Mg-Zn-Cr合金热扭转变形中连续动态再结晶机理[J].金属学报,1999,35(10):1031-1035.
[3]Woei-Shyan Lee,Wu-Chung sue,Chi-Feng Lin,Chin-Jyi Wu.The Strain Rate and Temperature Dependence of Dynamic Impact Properties of 7075 Aluminum Alloy[J].Journal of Materials Processing Technology,2000,100(1-3):116-122.
[4]赵金凤.铸造工艺对铝合金组织及性能的影响[J].铸造技术,2015,36(8):2091-2092.
[5]张小明,张延杰,田峰.多向锻造对改善7075铝合金性能的作用[J].稀有金属材料与工程,2003,32(5):372-374.
[6]张昌明,张会.采用Deform-3D对2A12铝合金锻造变形的模拟研究[J].锻压技术,2009,34(6):140-142.
[7]何春霞,秦国帅,吴素珍,等.热处理工艺对7075铝合金性能的影响[J].热加工工艺.2016,45(12):204-206.
[8]梁信.7085铝合金等温多向锻及有限元模拟研究[D].长沙:中南大学,2011.
[9]沈健,唐京辉,谢水生.AL-Zn-Mg合金的热变形组织演化[J].金属学报,2000,10(36):1033-1036.
[10]周建.7075铝合金在锻造过程中显微组织的演变和工艺模拟[D].沈阳:东北大学,2003.