结果表明：锰降低液相线温度和共晶温度，缩小凝固温度范围；
The results show that: manganese lowers liquidus and eutectic temperature, and narrows down the temperature range of solidification;
对适当范围的温度梯度，凝固速度较小时通道偏析易于形成。
Within a suitable range of temperature gradient, channel segregation is easy to develop when solidification rate is slow.
选择有效结晶温度范围小的铝合金、采用金属型铸型以及逐层凝固的冷却方式可以有效消除裂纹。
To prevent from heat crack, the choose of aluminum alloy with small crystal temperature range and the use of metal cast model, as well as adoption of gradual solidification style will be effective.
金属在熔炉或坩埚中预热到高于液化温度的一个合适范围内(不希望金属在浇铸完成前凝固)。
Metal is preheated in a furnace or crucible until is above the liquidus temperature in a suitable range (we don't want the metal solidifying before the pour is complete).
温度调解器是，除凝固点命令之外，也反应可编程序的成比例范围和最大值动力调整的一个真实的三方式控制器。
The temperature controller is a true three-mode controller that, in addition to set point commands, also responds to programmable proportional band and maximum power Settings.
温度调解器是，除凝固点命令之外，也反应可编程序的成比例范围和最大值动力调整的一个真实的三方式控制器。
The temperature controller is a true three-mode controller that, in addition to set point commands, also responds to programmable proportional band and maximum power Settings.
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