摘要:本文研究了上引连铸工艺参数对铜镁合金杆组织和性能的影响。选取的工艺参数有合金成分、上引速度、冷却强度。实验结果表明:铜镁合金顶杆温度应小于100℃。冷却水的进水温度应小于30℃。铜镁合金中镁含量以0.4%-0.6%为宜。铜镁合金的抗拉强度最高,为545MPa;导电率有所降低,为70.3%IACS,但能满足接触线对导电率70%IACS的要求。铜镁合金杆的截面积越小,冷却效果越均匀,晶粒度越小,这有利于提高铜镁合金杆的性能。上引速度过快会使合金的晶粒粗大,影响合金杆的性能,但考虑到要保持一定的生产效率,上引速度控制在260mm/min为宜。冷却强度越大,晶粒越细小,但冷却强度过大会使组织恶化。结晶器热平衡计算和宏观组织分析表明:冷却强度控制在25-30L为宜。31108
毕业论文关键词:上引连铸;上引速度;冷却强度
Research on upward continuous casting process parameters effect on Cu-Mg alloy rod macrostructure and properties
Abstract: This paper research on upward continuous casting process parameters effect on Cu-Mg alloy rod macrostructure and properties. The process parameters we selected are alloy composition, upward speed and cooling intensity. The experimental results showed that: the Cu-Mg alloy rod top temperature should below 100℃. The cooling water inlet temperature should below 30℃. The best content of magnesium in Cu-Mg alloy is 0.4%~0.6%. Cu-Mg alloy’s tensile strength which achieved to 545MPa. is highest. Conductivity is a bit lower, as 70.5%IACS. But it can meet requirements of conductivity is more than 70%IACS. The sectional area of Cu-Mg alloy rod is smaller, the cooling effect is better, grain size is smaller. That is helpful to improve the Cu-Mg alloy rod’s performance. Upward speed too fast will make grain grow and impact alloy’s performance, but considering about the production efficiency, the best upward speed is 260mm/min. The harder cooling intensity, the smaller grain is. Excessive cooling intensity will worsen the macrostructure, the best cooling water flow is 25-30L/min.
Key words: upward continuous casting; upward speed; cooling intensity
目录
1.前言 1
1.1上引连铸简介 1
1.2上引连铸设备组成 1
1.2.1熔化系统 1
1.2.2熔液液面跟踪系统 1
1.2.3熔液冷却结晶系统 1
1.2.4牵引系统 1
1.2.5收线系统 1
1.3上引连铸工作原理 2
1.4影响上引连铸的因素分析 2
1.4.1熔液粘度 2
1.4.2熔液温度 3
1.4.3熔液纯净度 3
1.4.4冷却速度 3
1.4.5上引速度 3
1.5上引连铸的缺陷与防止 3
1.6高速铁路接触线的研究进展 4
1.7选题的目的和意义 5
1.8课题研究的内容和目标 5
1.8.1研究内容 5
1.8.2研究目标 6
2.实验 7
2.1实验材料 7
2.2实验方案 7
2.2.1铜镁合金杆顶杆温度的变化 7
2.2.2结晶器的热平衡计算 7
2.2.3冷却水进水温度对铜镁合金杆传热的影响 7
2.2.4不同合金接触线的宏观组织和性能比较研究 7
2.2.5不同镁含量对铜镁合金杆宏观组织和性能的影响 7
2.2.6上引速度对铜镁合金杆宏观组织的影响 8
2.2.7冷却强度对铜镁合金杆宏观组织的影响 8
2.2.8截面积的变化对铜镁合金杆宏观组织的影响 8 上引连铸工艺参数对铜镁合金杆组织和性能影响研究:http://www.751com.cn/cailiao/lunwen_27152.html