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摘要：本文研究了不同加工工艺以及不同的挤压方式对铜合金杆组织和性能的影响。同时研究了不同合金成分对铸杆组织的影响。确定了上引连铸过程中最佳的出杆温度。选取的加工工艺有上引连铸、挤压、拉拔、轧制。在对各项加工工艺得出的金相以及晶粒度的观察和研究后，得出了一系列生产高速铁路接触导线网最佳生产工艺参数。实验结果表明：（1）在上引连铸过程中出杆温度控制在70℃最佳。（2）不同的合金加入后，由于物理化学的作用，铜与其固溶度均不同，导致其铸态组织也不尽相同（3）铜镁合金杆的加工过程中轧制和拉拔均能使其晶粒变形，但挤压对其晶粒度影响更为显著。（4）无论对铜合金杆采用何种挤压工艺，合金杆边缘晶粒度总会比中心晶粒度小。第1种挤压工艺比第2种挤压工艺对铜锡合金杆的晶粒度的改变较为显著。第3种挤压工艺比第4、第5种挤压工艺对铜银合金杆的晶粒度的改变较为显著。35553
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毕业论文关键词：铜镁合金；挤压；上引连铸；拉拔；轧制
Study on Different Processing Methods to the Copper Microstructure and Mechanical Properties of Magnesium Alloy Rods
Abstract: This paper studies the effect of different process and a different way of copper alloy extruded rods organization and performance and studied the effect of different alloy composition on the copper alloy casting rods organization as well. Determine the best course of continuous casting rod temperature. Select the process have on the continuous casting, extrusion, drawing, rolling. After the observation and study of the results of metallurgical processing and grain size, obtained a series of high-speed railway contact wire mesh production optimum process parameters. The results showed that: (1) In the process of continuous casting rod temperature was controlled at 70 ℃ best. (2) different alloy addition, the role of physical chemistry, copper and its solubility were different, leading to its cast structure are not the same (3) Copper and magnesium alloy rod processing in the process of rolling and drawing can make its grain deformation, but squeeze more significant influence on the grain size. (4) No matter what kind of copper alloy rod extrusion process, the grain size of the alloy rod edge will always be smaller than the central grain size. The first one kind of extrusion process than the first two kinds of extrusion process to change the grain size of the copper-tin alloy rod is more significant. Third extrusion process changes the grain size of copper and silver alloy rod is more significant than the fourth, fifth extrusion process.
Keywords: contact wire; copper magnesium alloy; extrusion; casting the lead; drawing; rolling
目录
1.前言 1
1.1高速铁路用铜镁合金接触线简介 1
1.2国内外高速铁路发展 2
1.2.1世界高铁发展概况 2
1.2.1中国高铁发展概况 3
1.3接触网及接触导线的基本要求和主要技术指标 3
1.3.1接触导线的基本要求 4
1.3.2接触导线的主要技术指标 4
1.4接触导线的不同加工工艺流程 5
1.4.1接触线材的工艺路线概述 5
1.4.2接触导线的上引连铸工艺 6
1.4.3接触导线的挤压工艺 7
1.4.4接触导线的轧制工艺 11
1.4.5接触导线的拉拔工艺 12
1.5选题的目的和意义 13
1.6课题的研究内容和目标 13
1.6.1研究内容 13
1.6.2研究目标 13
2.实验 14
2.1 试验原材料 14
2.2 试验仪器与设备 14