【摘 要】
：
The purpose of this study is to predict the morphologies in the solidification process for Cu-0.6Cr (mass fraction, %) alloy by vacuum continuous casting (VCC)
【机 构】
：
Department of Materials Science and Engineering
论文部分内容阅读
The purpose of this study is to predict the morphologies in the solidification process for Cu-0.6Cr (mass fraction, %) alloy by vacuum continuous casting (VCC) and verify its accuracy by the observed experimental results. In numerical simulation aspect, finite difference (FD) method and modified cellular automaton (MCA) model were used to simulate the macro-temperature field, micro-concentration field, nucleation and grain growth of Cu-0.6Cr alloy using real data from actual casting operations. From the observed casting experiment, the preliminary grain morphologies are the directional columnar grains by the VCC process. The solidification morphologies by MCAFD model are in agreement with the result of actual casting experiment well.
其他文献
Aligned carbon nanotubes (CNTs) were synthesized by nebulized spray pyrolysis of solutions of organometallics in carbon precursor solvents. Four types of straig
Ceramic coating was deposited on TiAl alloy substrate by micro-arc oxidation (MAO) in a silicate-aluminate electrolyte solution with additives including sodium
退耕还林不仅能改善当地生态环境，而且对农民收入和农村产业结构调整起到积极的促进作用。本文对核桃村退耕还林工作中核桃栽培目的、主要做法及基本原则进行阐述，为核桃村农民
由于矿床种类有很多，形成原因具有复杂性，找矿信息具有多解性，控矿因素具有隐蔽性以及矿床大多数深埋地下等特点，导致矿产资源具有不确定性并且难以预测。寻找矿产资源是一个风险
We have studied the optical and magnetic properties of ytterbium implanted GaN epilayer grown on(0001)sapphire by metalorganic chemical vapor by deposition(MOCV
The fabrication of nanocrystalline nickel coatings was conducted by pulse jet electrodeposition on the substrate of 45# carbon steel. The effects of average cur
A process design approach for multi-stage stretch forming was proposed by combining the strain distribution method and finite element method (FEM) to determine
In order to investigate the effects of pockets in the porthole die on the metal flow, temperature at the die bearing exit and the extrusion load were contrasted
矿产资源是国家战略资源的重要组成部分之一，也是满足社会经济发展与生活能源供给的主要手段。随着科学生产水平的快速发展，生产工具的快速迭代，人类改造自然与利用自然资源的能