CAJ | 학술논문

通过测试与分析不同结晶压力下真空差压铸造ZL114A铝合金的二次枝晶间距，研究结晶压力对真空差压铸造铝合金二次枝晶间距的影响；并建立真空差压铸造ZL114A铝合金二次枝晶间距与结晶压力和壁厚的关系。结果表明，结晶压力对真空差压铸造铝合金二次枝晶间距影响显著，对于相同壁厚的试样，随着结晶压力的增大，铝合金二次枝晶间距减小；在同一结晶压力下，随着壁厚的减小，铝合金二次枝晶间距减小；结晶压力小于350 kPa时，壁厚对二次枝晶间距影响较大；结晶压力大于350 kPa时，结晶压力对二次枝晶间距影响较大。
통과측시여분석불동결정압력하진공차압주조ZL114A려합금적이차지정간거，연구결정압력대진공차압주조려합금이차지정간거적영향；병건립진공차압주조ZL114A려합금이차지정간거여결정압력화벽후적관계。결과표명，결정압력대진공차압주조려합금이차지정간거영향현저，대우상동벽후적시양，수착결정압력적증대，려합금이차지정간거감소；재동일결정압력하，수착벽후적감소，려합금이차지정간거감소；결정압력소우350 kPa시，벽후대이차지정간거영향교대；결정압력대우350 kPa시，결정압력대이차지정간거영향교대。
The effect of crystallization pressure on the secondary dendrite arm spacing of vacuum counter-pressure casting ZL114A aluminum alloy was studied through testing and analyzing the secondary dendrite arm spacing (SDAS) subjected to different crystallization pressures. Meanwhile, the relationships among the secondary dendrite arm spacing of vacuum counter-pressure casting ZL114A aluminum alloy and crystallization pressure and wall thickness were established. The results indicate that the effect of crystallization pressure on the secondary dendrite arm spacing of vacuum counter-pressure casting aluminum alloy is obvious. For the samples with the same wall thickness, the secondary dendrite arm spacing of aluminum alloy decreases with the increase of crystallization pressure. Under the same crystallization pressure, the secondary dendrite arm spacing of aluminum alloy decreases with the decrease of wall thickness. When the crystallization pressure is less than 350 kPa, the effect of wall thickness on the secondary dendrite arm spacing is obvious, while when the crystallization pressure is more than 350 kPa, the effect of crystallization pressure on secondary dendrite arm spacing is obvious.