深冷处理对BS型Cu基触头组织结构的影响毕业论文.docVIP

毕 业 论 文 中文题目 深冷处理对BS型Cu基触头组织结构的影响 英文题目 The effect of cryogenic treatment?on the Structure of BS?type?Copper based contact? or ganization 【摘要】低温处理是一个令人兴奋的、重要的和廉价的技术，并且已有了许多重要发现和拥有很多未来的发展前景。低温处理是将材料在非常低的温度77K下冷却进行处理。这种技术已被证明能有效的提高材料如金属，合金，塑料和复合材料的物理和机械性能。它提高了磨损，磨损，腐蚀和腐蚀，耐久性和稳定的各种材料的强度特性。低温处理能改善和稳定的晶格结构和分布的碳粒子在产生更强、更耐用的材料。在本文中，我们回顾了深冷处理对某些金属，合金，塑料和复合材料的影响，包括组织和硬度的变化。 【关键字】低温处理，金属，合金，塑料，复合材料[1] 【Abstract】 Cryogenics is an exciting, important and inexpensive technique that already has led to main discoveries and holds much future assurance. Cryogenic processing is the treatment of the material sat very low temperature around 77K. This technique has been proven to be efficient in improving the physical and mechanical properties of the materials such as metals, alloys, plastics and composites. It improves the wear, abrasion, erosion and corrosion resistivity, durability and stabilizes the strength characteristics of various materials. Cryogenic re?nes and stabilizes the crystal lattice structure and distribute carbon particles throughout the material resulting a stronger and hence more durable material. In present paper, we have reviewed the effect of cryogenic treatment on some metals, alloys, plastics and composites.，including changes in microstructure and hardness. 【Keywords】 Cryogenic processing，Metals，Alloys，Plastics，Composites[1] 目录 第一章 绪论…………………………………………………………………………………1 1.1 前言…………………………………………………………………………………………1 1.2 深冷处理发展历史…………………………………………………………………………1 1.3 深冷处理机理………………………………………………………………………………1 1.3.1 黑色合金(钢铁)的深冷机理……………………………………………………………1 1.3.2 常用工模具钢深冷处理效果与主要作用机理…………………………………………3 1.3.3 马氏体相变与深冷处理的研究讨论……………………………………………………4 1.4 深冷处理设备………………………………………………………………………………5 1.5 深冷处理应用………………………………………………………………………………6 1.6 深冷处理效果………………………………………………………………………………6 1.7.选题的目的、意义及内容…………………………………………………………………7 1.7.1 选题的目的及意义………………………………………………………………………7 1.7.2 主要研究内容……………………………………………………………………………8 第二章 深冷处理实验方案及方法…………………………………………………………9 2.1 前期准备………………………………………………………………………………