轮框是在一个有125度高温和6个气压压力下在真空焗炉铸造的。
The wheels are cured in an Autoclave at 125 degrees C and 6 bar of pressure.
对不同保压压力下真空差压铸造试样致密度进行分析，探讨真空差压铸造工艺的凝固补缩特性，建立凝固补缩过程的数学模型。
Through analyzing the density of vacuum counter-pressure casting samples under different keeping pressures, their solidification feeding behavior and mathematical model were discussed.
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