旋转磁场对铜锡合金凝固组织影响研究

摘要旋转磁场对金属凝固组织和性能有显著的影响。本文利用电动机的定子和调压变阻器自制了一套简易的旋转磁场装置，用来研究对铜合金凝固组织的影响,采用的工艺参数有浇注温度、旋转磁场强度、旋转磁场搅拌时间。实验结果表明：自制的旋转磁场装置能满足实验要求。铜锡合金熔液浇注时，搅拌时间和旋转磁场强度起了较大作用。同样的旋转磁场强度下，搅拌时间越长，得到的晶粒越细小，铜锡合金的硬度越大，性能越好。在相同的浇注温度和搅拌时间下，随着旋转磁场强度的增加，得到铜锡合金晶粒细化得越好，其硬度越大，性能更优越。较佳的旋转磁场搅拌工艺参数为：旋转磁场强度200V，搅拌时间20S。 57153
毕业论文关键词：旋转磁场；磁场强度；搅拌时间 Effect of rotating magnetic field on Cu-Sn alloy solidification structure Abstract Rotating magnetic field had good effect on alloy solidification structure and property. This paper researched on the effect of rotating magnetic field on Cu-Sn alloy solidification structure by the self-made simple rotating magnetic field equipment consisting of electromotor determinant and pressure regulator. The measuring parameters were the pouring temperature, magnetic field intensity and stirring time and magnetic field intensity. The experimental results showed that self-made simple rotating magnetic field equipment can meet experiment requirements and stirring time and magnetic field intensity have play important role in Cu-Sn alloy pouring process. The conditions for Cu-Sn alloy are as followed: at the same magnetic field intensity, the stirring time was longer, the size of grain was smaller, the grain boundary spacing was smaller, the alloy can get better rigidity and property. When the temperature and time of pouring were instant, the magnetic field intensity was larger, the grain refining was better, the alloy can get better rigidity and property. The better preferable rotating magnetic field technological parameters: the rotating magnetic field intensity was 200V, the stirring time was 20S. Key words: rotating magnetic field; magnetic field intensity; stirring time

1.前言 1

1.1 旋转磁场应用研究进展 .... 1

1.1.1 电磁搅拌装置的分类 .. 1

1.1.2 电磁搅拌装置的工作原理 ... 1

1.1.3 电磁搅拌装置对金属组织和性能的影响 ... 1

1.2 旋转磁场装置的工作原理 2

1.3 旋转磁场装置对金属凝固组织的作用机理 . 2

1.4 旋转磁场对金属凝固组织的影响 .. 3

1.5 高速铁路所用接触线的研究进展 .. 3

1.5.1 高速铁路常用接触线的种类和特点 .. 3

1.5.2 不同元素对铜合金接触线性能的影响... 4

1.5.3 高速铁路用接触线的生产工艺 4

1.6 选题的目的和意义 .. 4

1.7 课题研究的内容和目标 .... 5

1.7.1 研究内容... 5

1.7.2 研究目标... 5

2.实验 6

2.1 实验材料 .... 6

2.2 实验方案 .... 6

2.2.1 旋转磁场装置的设计和制造 .... 6

2.2.2 浇注温度对铜锡合金凝固组织和性能的影响 6

2.2.3 旋转磁场强度对铜锡合金凝固组织和性能的影响 .. 7

2.2.4 旋转磁场的搅拌时间对铜锡合金凝固组织和性能的影响 .... 7 旋转磁场对铜锡合金凝固组织影响研究:http://www.youerw.com/wuli/lunwen_61740.html