At the condition of natural cooling of core, this thesis research how core diameter, casting wall thickness and the wall thickness at the part of hot spot effect the hot spot of core;

• 在型芯自然冷却条件下,通过研究型芯直径、热节部分铸件壁厚、铸件壁厚等因数对铸件热节形成即铸件温度场平衡的影响,寻求上述因数影响铸件热节形成的定量的关系;