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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 828 pages |
| ISBN: | 978-0-9879917-0-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Influence Of Mechanical Vibration On Grain Refinement Of Copper Solidification
Yanbing ZONG1; Daqiang Cang1; Chen Wang1;1UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beijing, China;
Type of Paper: Regular
Id Paper: 522
Topic: 4
Abstract:
In this paper through a lot of comparison of test it is found for mechanical vibration added in liquid copper its solidification structure is changed from large grains to fine grains with equiaxed crystals by means of optical metallographic, under different processing conditions such as vibration frequency, amplitude, casting temperatures as well as the types of vibration. With the increasing vibration frequency, columnar crystals become thinner; equiaxed grains increase, although its size is still large. It is analyzed that there is an optimal vibration frequency for fine grains. At an appropriate frequency, mechanical vibration can improve the solidified structure of metals obviously by increasing amplitude. Horizontal and vertical vibrations are similar impacting on solidified structure of pure copper. The lower casting temperature is good for the formation of fine equiaxed grains with the vibration applied. There are several mechanisms of mechanical vibration treatment on solidification structure, which is also discussed in this paper.