Experiments for hot mold shell with isolated hot spot by local water quenching in investment casting before and after pouring were conducted.
对熔模铸件孤立热节热型壳进行了浇注前及浇注后局部水淬激冷试验。
Analysis of hot spot resulting from core during casting process was conducted by ANSYS software aiming at the boss hot spot.
以凸台型热节为对象，采用ANSYS软件对铸造过程中由于型芯形成的热节进行分析。
The changes of place and size of casting hot spot with the time are based on structure of casting, material of mould and the position of gate and riser.
热节的位置、大小受铸件结构、铸型材质和浇冒口系统的开设位置所影响。
According to the simulated temperature fields and solid fraction, the hot spot and shrinkage porosity are not found in the bolster casting, so the new casting process is feasible.
温度场和固相分数的模拟结果表明，铸件没有产生热节和缩孔缺陷，表明了新工艺的可行性。
The white spot defect is an abnormal structure generally found in large cast iron cylinder sleeve by centrifugal casting.
白斑是离心铸造厚壁铸铁缸套的一种异常组织。
The results indicate that the casting defects are mainly shrinkage porosity and cracks caused by solidification shrink, which mainly presents in the hot spot between the spoke and the rim.
研究表明：轮毂的工艺缺陷主要为缩孔、缩松以及凝固过程中收缩导致的裂纹缺陷，主要分布在轮辋、辐条交汇的热节部位。
The results indicate that the casting defects are mainly shrinkage porosity and cracks caused by solidification shrink, which mainly presents in the hot spot between the spoke and the rim.
研究表明：轮毂的工艺缺陷主要为缩孔、缩松以及凝固过程中收缩导致的裂纹缺陷，主要分布在轮辋、辐条交汇的热节部位。
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