硼元素的遗传效应对铝棒中心裂纹的影响

Influence of Boron Element on Center Crack of Aluminum Rod

铝棒中心裂纹是铸造过程常见严重质量缺陷。造成铝棒中心裂纹的原因,除了常见的由铸造工艺造成,如铝液温度、充液时间、铸造速度、冷却速度外,铝锭本身存在的硼元素也会导致中心裂纹。铝锭中的B元素具有遗传效应,会遗传到铝棒中。在生产实践中,铝棒质量控制体系应将B元素列入原材料铝锭、炉前化学成分的分析元素,对B含量进行质量监控,有助于铝棒质量控制体系的完善,并针对B元素含量,作出应对措施,避免晶粒粗大和中心裂纹。

The center crack of aluminum bar is a common serious quality defect in casting process.Beside casting process,such as alu.minum liquid temperature,liquid time,casting speed,cooling speed,its boron element are the cause of the centre crack for aluminum bar.In production practice,B element should be included in analysis elements of raw material aluminum ingot and furnace chemical composition for aluminum bar quality control system,and quality control for B content shall be conducted,to help to perfect quality control system,and corresponding countermeasures have been made for B element,to avoid the coarse grains and center crack.