摘要：大塑性变形(severe plastic deformation，SPD)是一种用于提升材料性能的工艺技术。随着航空航天技术、军事装备以及交通工具等各个领域的迅猛发展，对高性能金属材料尤其是对高比强材料的需求日益增长。高比强度材料近几年来一直是各国材料研究的热点，也是竞争最激烈的材料领域之一。大塑性变形的本质意义是细晶强化，晶粒越细材料的强度越高, 相比于传统细晶强化，大塑性变形的变形量施加于材料本身,大量研究成果表明，当材料晶粒小到一定量时，起强化作用的并不是单纯的一种强化机制，而是多种强化机制共同参与作用，因此，只有将多种机制组合，才能够充分的挖掘出材料的性能。大塑性变形就是在这样的背景下发展起来的工艺技术。24615
毕业论文关键词： H85黄铜；大塑性变形；高比强材料；强化机制；细晶强化
The effect of rolling deformation on Microstructure and mechanical properties of H85 Brass
Abstract: Severe plastic deformation(SPD) is a process for improving material performance. With the rapid development in various fields of aerospace, military equipment and vehicles for high performance metal materials, especially for high specific strength materials, growing demand. High strength material has been a hotspot in materials in recent years, is one of the most competitive materials. The essence of SPD is fine grain strengthening, more fine grain material strength is more high, compared to the traditional fine grain strengthening, deformation of SPD is applied to the material itself, a large number of research results show that, when the material of small grain size to a certain amount, play the role of strengthening is not a strengthening mechanism simple, but various strengthening mechanisms involved in action, therefore, only the combination of a variety of mechanisms, can dig the material properties. Technology for large plastic deformation is developed under this background.
KeyWords: H85Brass; SPD; High specific strength materials; The strengthening mechanism; Fine grain strengthening.
目 录
1 绪论 1
1.1 大塑性变形 1
1.1.1 大塑性变形介绍 1
1.1.2 大塑性变形定义及原理 1
1.1.3 大塑性变形法 3
1.1.4 SPD技术分类及其存在问题 3
1.1.5 大塑性变形工艺 4
2 实验部分 12
2.1 实验目的 12
2.2 实验原料H85黄铜 12
2.3 黄铜组织与性能 13
2.3.1 合金制备 13
2.3.2 合金显微组织 13
2.3.3 合金力学性能 17
2.4 实验器材 18
2.5 实验过程 22
2.5.1 实验原料 22
2.5.2 轧制过程 22
2.5.3 轧后退火过程 23
2.5.4 弯曲过程 24
2.5.5 弯曲试样镶嵌过程 25
2.5.6 试样的晶相观察 27
2.5.7 试样的显微硬度 27
2.5.8 整理记录 28
2.6 实验数据 28
2.7 实验分析 29
2.7.1 显微硬度分析 29
2.7.2 组织分析 30 H85黄铜轧后弯曲变形对其组织与性能的影响:http://www.751com.cn/wuli/lunwen_18206.html