CAJ | 학술논문

通过显微组织、扫描电镜观察及能谱分析等手段,分析了5 A06铝合金铸锭裂纹的产生原因. 通过组织分析,该裂纹为沿晶断裂,属于热裂纹,在主裂纹区域发现很多微裂纹,并且裂纹与第二相伴生,存在大量晶内弥散相聚集于裂纹附近,裂纹发生时间为铸锭凝固末端. 并从形成机理上对5A06铝合金铸锭裂纹的成因进行了分析,从铸造工艺等方面提出了解决措施.
통과현미조직、소묘전경관찰급능보분석등수단,분석료5 A06려합금주정렬문적산생원인. 통과조직분석,해렬문위연정단렬,속우열렬문,재주렬문구역발현흔다미렬문,병차렬문여제이상반생,존재대량정내미산상취집우렬문부근,렬문발생시간위주정응고말단. 병종형성궤리상대5A06려합금주정렬문적성인진행료분석,종주조공예등방면제출료해결조시.
The reasons of 5A06 aluminum alloy casting ingot crack were analyzed through optical mi-croscope, SEM and EA.Through analyses of the casting crack, cracks are intergranular fracture that is belonging to hot cracking, and many micro -cracks were found in the crack region, and these cracks is associated with second phase.The large intragranular dispersion gathered near the cracks. The cracks were found in the end of the ingot solidification.The causes of crack of the 5A06 were an-alyzed based on formation mechanism, and the solutions are proposed in the respect of casting process.