Paper Title :Vertical Twin Roll Casting of Aluminum Alloy A7075 Using Copper Rolls
Author :Hayato Ueno, Shogo Matsumura, Yusei Otake, Taiyo Iguchi, Daiki Ishikawa, Shinichi Nishida
Article Citation :Hayato Ueno ,Shogo Matsumura ,Yusei Otake ,Taiyo Iguchi ,Daiki Ishikawa ,Shinichi Nishida ,
(2024 ) " Vertical Twin Roll Casting of Aluminum Alloy A7075 Using Copper Rolls " ,
International Journal of Mechanical and Production Engineering (IJMPE) ,
pp. 29-31,
Volume-12,Issue-11
Abstract : This paper reports on the vertical twin roll casting of aluminum alloy A7075. Aluminum alloy A7075 belongs to the
highest strength alloys and its sheets are produced by rolling and extrusion. It is used in the aerospace industry and for special
applications, but it has a high susceptibility to solidification cracking and is difficult to obtain sheets easily. Twin-roll casting
can produce thin sheets directly from molten metal, making it possible to produce plates other than conventional alloys for
plates. In this study, thin sheets were produced using copper rolls with higher thermal conductivity than the iron rolls used in
the previous study. The aim of this study is to fabricate good thin plates by using copper rolls with high thermal conductivity to
cool and solidify the material more rapidly. The roll diameter was 200 mm. The initial roll gap was 0.5 mm and the pouring
temperature was 700℃. The solidification length was 78 mm. The roll speed was mainly varied experimental conditions, and
the value were from 1 m/min to 10 m/min for the investigation of the effects on the strip surface conditions. It was possible to
produce A7075 strips by vertical twin roll strip casting process. Very large cracks occurred when thin sheets were produced
using copper rolls at a roll peripheral speed of 5 m/min. This is thought to be due to the good continuity of the thin sheets
produced, and the longer sheets hitting the bucket placed at the bottom of the experimental apparatus and jamming in the roll
gap area. This problem can be solved by installing a guide using rollers at the bottom of the experimental apparatus.The sheet
surface texture consisted of metallic luster and mud areas.
Keywords - Aluminum Alloy A7075, Twin Roll Casting Process, Copper Rolls, Surface Condition, Strip Thickness.
Type : Research paper
Published : Volume-12,Issue-11
Copyright: © Institute of Research and Journals
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Published on 2025-03-17 |
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