【摘要】 本文用铝硅合金进行实验，分析和研究了合金凝固特点（结晶区间宽窄．线收缩 率的大小，物理力学性能差异，共晶体含量多少等）对热裂的影响。并对以结晶宽窄 和热裂抗力大小来判别热裂倾向的传统观点进行一定的分析，提出了新的见解．更多还原

【Abstract】 A large number of expeiments are carried out by means of aluminum-silicon alloys in this paper. It emphaticallystudies and analyzes the influence of the solidification characteristics of alloys (breadth of crystallization area, size of cry- stallization area, size of percentage of linear shrinkage, differential of physical- mechanical properties, quantity of eutecticum involved etc.) on the hot tearing. Furthermore, the traditional viewpoint for examining the tendency of hot tea- ring by means of breadth of crystallization area and size of resistance to hot tea- ring has been further carried out, and a new opinion is presented.更多还原