上引连铸铜镁合金杆中心缩孔形成机理
毕业论文关键词：上引连铸；缩孔；冷却强度
Mechanism on center of shrinkage cavity of Magnesium copper alloy rod with continuous up-casting
Abstract: This paper mainly studied the high iron contact line shrinkage cavity of the problems in the process of production. Found molten temperature, cooling intensity and the lead-rate all have an impact on shrinkage cavity formation. The experimental results show that in the continuous casting production, the higher the cooling intensity, the less prone to shrinkage, the higher the initial temperature, the more prone to shrinkage cavity. The lead faster, more prone to shrinkage, the best speed is not prone to shrinkage lead between 228mm/min-261mm/min.cooling water inlet temperature is high ,the lower the cooling intensity, the greater the probability of shrinkage cavity formation.
Keywords: The continuous up-casting；shrinkage cavity；cooling intensity
目录
1.前言 1
1.1高速铁路用接触线的种类及特点 1
1.1.1.高铁用接触线的加工方法 1
1.1.2.高铁对接触线要求 2
1.2铜镁合金接触线的生产 2
1.3上引连铸简介 3
1.4.上引连铸缺陷 4
1.5上引连铸铜镁合金杆中心缩孔形成影响因素 5
1.5.1.溶液粘度 5
1.5.2.熔液温度 5
1.5.3.熔液纯净度 5
1.5.4.冷却速度 6
1.5.5.上引速度 6
1.6选题的目的和意义 7
1.7课题的研究内容和目标 7
1.7.1.研究内容 7
1.7.2.研究目标 7
2.实验 9
2.1试验材料 9
2.2试验方法 9
2.2.1.缩孔诊断 9
2.2.2.上引连铸工艺参数对铜镁合金杆中心缩孔形成的影响 9
2.3实验设备 10
2.3.1.上引连铸机 10
2.3.2.金相显微镜 11
2.3.3.扫描电镜 11
2.3.4.抛光机 12
2.4试验过程 12
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