摘要
7A09合金厚板边部区域沿厚度方向中心部位产生小裂口,小裂口的产生非铸锭冶金缺陷引起的。这是由于轧制初期板材心部存在低塑性铸态组织,在此情况下板材进行滚边处理,滚边量过大导致板材边部出现内部开裂。为了消除此类小裂口,热轧时应控制铸锭加热温度,合理分配道次压下量及控制滚边时机和滚边量。
The small cracks formed in the centre of 7A09 alloy plate along the width direction are not due to the metallurgical defects of ingots. In order to eliminate this kind of crack, heating temperature of ingot, pass reduction and edging should be rationally controlled during the hot rolling.
出处
《铝加工》
CAS
2003年第5期16-18,52,共4页
Aluminium Fabrication
