摘要随着工业的发展，普通熔铸工艺生产的镍铝青铜合金已经不能满足人们对其性能的要求，将电磁工艺应用于镍铝青铜的铸造中已经成为一个迫不及待的问题。本次毕业设计利用非真空高频感应炉来熔炼镍铝青铜合金，并在镍铝青铜合金凝固时加入电磁搅拌工艺。本次实验利用蔡司显微镜来观察经过不同电磁搅拌强度的镍铝青铜合金试样的金相组织有何区别。并用洛氏硬度计来测量试样的硬度，用电导率测量仪来测定试样的电导率。实验中不同强度的电磁搅拌是通过调节非真空高频感应炉的功率得以实现的。在镍铝青铜合金试样凝固时，将非真空高频感应炉的功率分别调至2KW，3KW，4KW以获得不同强度的电磁搅拌。87192

通过实验得知，没有经过电磁搅拌的镍铝青铜试样的晶粒较为粗大，硬度和导电率都较低。而经过电磁搅拌的镍铝青铜试样组织致密，晶粒细小，并且硬度和导电率都有明显的提高。因此通过电磁搅拌之后镍铝青铜的性能可以得到更好的改善。

毕业论文关键词：镍铝青铜；电磁搅拌；金相；硬度

AbstractWith the development of industry, ordinary nickel-aluminum bronze alloy casting production process can not meet the performance requirements of its people, will be applied to the electromagnetic process of nickel aluminum bronze casting has become a problem can not wait。 The graduation project used non-vacuum induction furnace to smelt nickel-aluminum bronze alloy, and add EMS Process nickel aluminum bronze alloy solidification。 The experiments use Zeiss microscope to observe any difference between the different microstructure after electromagnetic stirring strength nickel aluminum bronze alloy samples。 And Rockwell hardness and conductivity meter to measure the hardness and conductivity of the sample。Experiment with different intensities of electromagnetic stirring by adjusting the non-vacuum induction furnace power can be realized。 When the nickel aluminum bronze alloy solidification sample, non-vacuum induction furnace power were adjusted to 2KW, 3KW, 4KW to obtain different intensity electromagnetic stirring。

  Through experiments, without electromagnetic stirring of the sample of grain is coarser, hardness and conductivity are low。 The nickel-aluminum bronze specimen tissue through electromagnetic stirring dense, fine grain size, and hardness and conductivity are significantly improved。 Therefore, through the electromagnetic stirring the performance of nickel-aluminum bronze can be better improved。

Keywords: Nickel Aluminum Bronze; electromagnetic stirring; microstructure; Hardness

目 录

第一章 绪论 1

1。1 引言 1

1。2 镍铝青铜的应用概况 1

1。2。1 镍铝青铜在海洋工程的应用 1

1。2。2 镍铝青铜在焊接和热喷涂的应用 3

1。2。3 镍铝青铜在防爆工具和其他方面的应用 3

1。3 镍铝青铜的铸造工艺的研究发展概况 4

1。4 电磁冶炼工艺的发展 4

1。5 电磁冶金工艺的应用 5

1。5。1 电磁冶炼 5

1。5。2 电磁搅拌 6

1。5。3 电磁制动冶金 7

1。5。4 软接触电磁连铸技术 7

1。5 电磁搅拌在国内外的发展 8

1。6 本课题研究内容