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采用四因素三水平的正交实验法,研究了模数比、机械振动频率、机械振幅和起振温度对ZL205合金凝固补缩和致密度的影响,并分析了其作用机理。结果表明,四种机械振动参数中对缩孔体积影响从大至小依次为:模数比>机械振动幅度>起振温度>机械振动频率;四种机械振动参数中对致密度影响从大至小依次为:模数比>机械振动频率>起振温度>机械振动幅度。为了获得最小缩孔体积的铸造工艺参数为:振动频率15 Hz、振幅0.8 mm、模数比1.25、起振温度为610℃;为了获得最佳致密度的铸造工艺为:振动频率25 Hz、振幅0.8 mm、模数比1.25、起振温度为650℃。
The effects of modulus ratio, mechanical vibration frequency, mechanical amplitude and initial temperature on the solidification shrinkage and density of ZL205 alloy were investigated by orthogonal experiment with four factors and three levels. The mechanism of action was also analyzed. The results show that the influence of four kinds of mechanical vibration parameters on the shrinkage volume are as follows: modulus ratio> mechanical vibration amplitude> start-up temperature> mechanical vibration frequency; the influence of four kinds of mechanical vibration parameters on the density from big to small Small in order: modulus ratio> mechanical vibration frequency> starting temperature> mechanical vibration amplitude. In order to obtain the minimum shrinkage volume of the casting process parameters: vibration frequency of 15 Hz, amplitude 0.8 mm, modulus ratio 1.25, starting temperature of 610 ℃; In order to obtain the best density of the casting process: vibration frequency 25 Hz, amplitude 0.8 mm, modulus ratio 1.25, starting temperature of 650 ℃.