The methods about controlling alloy components and increasing melt purity were presented. The methods of preventing castingcrack were presented.
提出了控制合金成分、提高金属纯洁度的方法，重点提出了解决扁铸锭裂纹的措施。
2
Improper forging process will also appear large grain or uneven, hardening crack phenomenon, forging cost is higher than the casting flange.
锻造工艺不当也会出现晶粒大或不均，硬化裂纹现象，锻造成本高于铸造法兰。
3
From quality of melting metal, casting condition and casting equipment, the influence factors of crack in aluminium and its alloy slab ingot were analyzed, some suggestion have been drawn out.