金属板材平辊轧制工艺研究
关键词 镁合金 工艺因素 有限元模拟 应变均匀性 边裂损伤
毕业论文设计说明书外文摘要
Title Study of Flat Rolling Technology of Metallic Sheet
Abstract
The factors such as rolling temperature, rolling speed and decrease of rolling reduction rate have important influence on the rolling process of magnesium alloy sheet . In order to guarantee the performance of rolled magnesium alloy sheet, it is the key to ensure the flow law, cracking behavior and deformation uniformity during rolling process of magnesium alloy sheet.AZ31B magnesium alloy sheet was chosen as the research object, DEFORM-3D finite element simulation software was used to do finite element simulation to the flat rolling process of magnesium alloy sheet. The results obtained by finite element modeling are used to do selective analysis of Technological factor’s influences on rolling process. The results which are obtained are: the decrease of reduction rate, the decrease of rolling speed and the increase of rolling temperature can all make the rolling force to decrease; Strain uniformity would increase along with decrease of rolling reduction rate ; Edge crack damage would decrease along with the decrease of rolling reduction rate, the increase of rolling speed and the decrease of rolling temperature. thus, the optimal scheme for hot rolling of AZ31B magnesium alloy sheet can be proposed: the rolling reduction rate is 20%, the rolling speed is 0.5m/s and the rolling temperature is 350℃.
Keywords Magnesium alloy Technological factor Finite element simulation Strain uniformity Edge crack damage
目录
1 绪论 1
1.1 引言 1
1.2 有限元模拟的应用现状 2
1.2.1 成形工艺多样化 2
1.2.2 材料种类多样化 3
1.2.3 材料组织多样化 3
1.3 轧制工艺的研究现状 4
1.3.1 温度的影响 4
1.3.2 变形量的影响 4
1.3.3 变形速度的影响 5
1.4 存在的问题 5
1.5 本课题的研究内容及目的意义 5
2 有限元模拟过程 6
2.1 软件介绍 6
2.2 几何模型的建立 6
2.3 有限元模型的建立 7
2.3.1 几何模型的导入 7
2.3.2 材料的定义 7
2.3.3 网格的划分 8
2.3.4 边界条件的设置 8
2.3.5 模拟参数的设置 9
2.4 有限元模拟方案 9
3 有限元模拟结果及讨论 11
3.1 轧制过程的分析 11
3.2 压下率对轧制过程的影响 13
3.2.1 压下率对轧制力的影响 13