405 Continuous strip casting of copper alloy by vertical twin roll casting process

Abstract Copper alloy C19210 have excellent corrosion resistance, heat resistance, and conductivity, and is used for precision electronic parts such as lead frame materials. Conventionally, copper alloy strips are manufactured by repeating heat treatment and cold rolling, and have a problem that it is multi-process and production cost is expensive. On the other hand, twin roll casting can improve the above problems because strips are made directly from molten metals. In this study, twin roll strip casting of copper alloy C19210 using commercial scale machine was operated. The aims of this study is to investigate the possibility of strip casting for copper alloy. The effect of the side dam and release agent was researched. The effect of rolls speed on the strip surface condition was researched. The improved side dam prevented molten metal leakage. The release agent prevented sticking of the manufactured strip to the roll surface. The strip produced at roll speed of 7 m/min and 10 m/min had a lot of metallic luster. Moreover, the strip produced at roll speed of 7 m/min had more metallic luster than the strip produced at roll speed of 10 m/min. The lower the roll speed is, the greater the rolling load is. At a roll speed of 7 m / min, the rolling load became the maximum rolling load of the equipment. For producing strips with copper alloy C19210, higher rolling loads are preferred.

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Review on Vertical Twin-Roll Strip Casting: A Key Technology for Quality Strips

Journal of Metallurgy ◽

10.1155/2016/1038950 ◽

2016 ◽

Vol 2016 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Seshadev Sahoo

Keyword(s):

Casting Process ◽

Strip Casting ◽

Iron And Steel Industry ◽

Iron And Steel ◽

Twin Roll Casting ◽

Roll Casting ◽

Near Net Shape ◽

The Subject ◽

Twin Roll ◽

Metal Delivery

Nowadays near-net-shape casting technology is an important area of research in the iron and steel industry. Among different kinds of near-net-shape casting process, twin-roll casting process has received much attention among researchers. Twin-roll casting (TRC) has been the subject of extensive research, not only to develop the technology but also to achieve an understanding of microstructural evolution and to produce quality strips. The main issues concerning the design and operation of twin-roll casters are metal-mold heat transfer, metal delivery system, and their possible effects on the solid shell formation and characteristics of the strips. The present review gives an idea about the process aspect, modeling, and quality issues in vertical twin-roll strip casting process and helps to improve the design of twin-roll strip caster.

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The Microstructure and Processing in Twin Roll Casting of Magnesium Alloy Strip

Materials Science Forum ◽

10.4028/www.scientific.net/msf.488-489.427 ◽

2005 ◽

Vol 488-489 ◽

pp. 427-430 ◽

Cited By ~ 15

Author(s):

Chun Mei Yang ◽

Ding Fei Zhang ◽

Pei Dao Ding ◽

Fu Sheng Pan

Keyword(s):

Magnesium Alloy ◽

Casting Process ◽

Strip Casting ◽

Casting Temperature ◽

Process Stability ◽

Cast Strip ◽

Twin Roll Casting ◽

Roll Casting ◽

Twin Roll ◽

Cast Microstructure

Magnesium has a hexagonal close-packed crystal structure which makes it more difficult to deform than aluminum. Conventional strip production usually requires several process steps to reach the final strip thickness. Strip casting can reduce some of the process steps and make strip processing simpler and easier, especially for alloys with poor deformability. The twin-roll casting process can directly obtain strips with thickness less than one or two millimeters. In this paper, the metallurgical characteristics of the twin-roll strip casting process were analyzed and discussed. A laboratory scale vertical twin roll caster in prepared AZ31 magnesium alloy strips, with 1.0 to 2.0 mm thick and 150mm wide. Process stability in the thin strip casting process of the alloy has been studied, the casting temperature (superheat) was proven to be a key factor influencing process stability and casting strip quality. The as-cast microstructure of the alloy was analyzed and evaluated by optical microscopy, which showed that the as-cast microstructure was composed of developed dendrites when the superheat was high, and of a rosebush-like structure when the superheat was low. When the casting temperature was close to the liquid phase temperature，the as-cast microstructure became global or grainy, and the grain size of the cast strip was very small. This remarkably improved the deformability of the as-cast strip.

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Continuous Strip Casting of High Mg-containing Aluminum Alloy using Commercial Scale Twin Roll Casting Machine

The Proceedings of the Materials and processing conference ◽

10.1299/jsmemp.2020.28.221 ◽

2020 ◽

Vol 2020.28 (0) ◽

pp. 221

Author(s):

Takahiro SHIGA ◽

Makoto HAGIWARA ◽

Shogo IMAI ◽

Mizuki KAWAWA ◽

Hisamichi OHNO ◽

...

Keyword(s):

Aluminum Alloy ◽

Casting Machine ◽

Strip Casting ◽

Twin Roll Casting ◽

Commercial Scale ◽

Roll Casting ◽

Twin Roll ◽

Continuous Strip

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Effect of Secondary Cooling on Non-Oriented Electrical Steel Strips Produced by Twin-Roll Casting Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.690-693.218 ◽

2013 ◽

Vol 690-693 ◽

pp. 218-221

Author(s):

Ting Zhang ◽

Xiao Ming Zhang ◽

Zhi Yuan Guo ◽

Yu Qian Wang ◽

Cheng Gang Li

Keyword(s):

Electrical Steel ◽

Casting Process ◽

Air Cooling ◽

Secondary Cooling ◽

Twin Roll Casting ◽

Steel Strips ◽

Roll Casting ◽

Average Size ◽

Equiaxed Grains ◽

Twin Roll

Effect of secondary cooling on non-oriented electrical steel strips was investigated. The 2.0 mm thick cast strips contain two compositions were produced by twin-roll casting process, cooled in the air or cooled by spraying water. The microstructure was observed by optical microscopy, and EBSD was used to characterize the texture of the cast strips. The results showed that air-cooling cast strips have uniform and equiaxed grains with average size of 250 μm. The microstructure of the water-spraying cast strips compose of most equiaxed grains and a small number of abnormal big grains. At the same time, the secondary cooling rate mildly affects the cast texture strength but has no influence on the texture type.

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