Three-Layer Clad Strip Casting Using a Vertical Type Tandem Twin Roll Caster

2018 ◽  
Vol 773 ◽  
pp. 171-178
Author(s):  
Toshio Haga ◽  
Kentaro Okamura ◽  
Hisaki Warari ◽  
Shinichi Nishida
Keyword(s):  
Aluminum Alloy ◽  
Strip Casting ◽  
Tensile Shear ◽  
Shear Testing ◽  
Roll Speed ◽  
Solidification Temperature ◽  
Twin Roll Caster ◽  
Twin Roll

This paper shows improvements made to a vertical type tandem twin roll caster and the appropriate casting conditions necessary to cast three-layer clad strips, the base strip of which has a lower solidification temperature than the overlay strip. In experiments, 4045 aluminum alloy was used for the base strip and 3003 aluminum alloy was used for the overlay strips. The roll speed was 30 m/min. By connecting the overlay strips to the base strip one at a time and cooling the base strip to between 450 and 530°C after applying the first overlay strip, a sound three-layer clad strip – defined as one in which the interfaces between strips are clear and do not separate during bending-to-failure tests – could be cast. The tensile shear testing between the base and second overlay strip was improved as the base-strip temperature was increased to 450-530°C range.

Continuous Strip Casting of Aluminum Alloy AC7A Using Commercial Scale Twin Roll Caster

2020 ◽  
Vol 2020.28 (0) ◽  
pp. 409
Author(s):  
Makoto HAGIWARA ◽  
Shogo IMAI ◽  
Takahiro SHIGA ◽  
Mizuki KAWAWA ◽  
Shinichi NISHIDA
Keyword(s):  
Aluminum Alloy ◽  
Strip Casting ◽  
Commercial Scale ◽  
Twin Roll Caster ◽  
Twin Roll ◽  
Continuous Strip

Roll Casting of Al-40%Sn-1%Cu Strip

2018 ◽  
Vol 382 ◽  
pp. 147-154
Author(s):  
Toshio Haga ◽  
Ryusuke Onishi ◽  
Hisaki Watari ◽  
Shinichi Nishida
Keyword(s):  
Aluminum Alloy ◽  
Molten Metal ◽  
Solidification Time ◽  
Roll Speed ◽  
Strip Surface ◽  
Sliding Bearings ◽  
Roll Casting ◽  
Twin Roll Caster ◽  
Metal Microstructure ◽  
Twin Roll

Strip casting of Al-40%Sn-1%Cu, which is an aluminum alloy used for sliding bearings, was attempted using an unequal diameter twin roll caster. The conditions required to cast sound strips, including the roll speed, molten temperature, roll load, solidification length, melt head, and use of an upper plate, were investigated. The roll load required to make a stable strip surface was 0.01 kN/mm, and the porosity was minimum when the solidification time was less than 0.6 s. The solidification time was controlled by the roll speed and the solidification length. The casting temperature must be set below 670°C to properly solidify the molten metal, and the metal microstructure became finer as the melt head decreased.

Effect of Base Strip Temperature on Bonding of Three-Layer Clad Strip Cast by a Vertical-Type Tandem Twin Roll Caster

2018 ◽  
Vol 792 ◽  
pp. 8-15
Author(s):  
Toshio Haga ◽  
Kentaro Okamura ◽  
Hisaki Warari ◽  
Shinichi Nishida
Keyword(s):  
Shear Stress ◽  
Aluminum Alloy ◽  
Cold Rolling ◽  
Shear Test ◽  
Tensile Shear ◽  
Bonding Condition ◽  
Strip Cast ◽  
Twin Roll Caster ◽  
Twin Roll

The effect of the base strip temperature on the bonding between base strip and overlay strips in a three-layer clad strip cast by a vertical-type tandem twin roll caster was investigated. The base strip was 3003 aluminum alloy and the overlay strip was 4045 aluminum alloy. The bonding was investigated for base strip temperatures ranging from 200 °C to 550 °C. The bonding condition was investigated by cold-rolling, bending-to-failure test and tensile shear test. The shear stress increased with the base strip temperature. Sound bonding was achieved at base strip temperatures higher than 450 °C. The results of this study indicated that the second caster is not required to be set below the first roll caster.

Casting of Aluminum Alloy Clad Strip Using a Vertical Type Tandem Twin Roll Caster

2010 ◽  
Vol 97-101 ◽  
pp. 1053-1056 ◽  
Author(s):  
Ryoji Nakamura ◽  
Ryoji Nakamura ◽  
Shinji Kumai ◽  
Hisaki Watari
Keyword(s):  
Aluminum Alloy ◽  
Roll Speed ◽  
Twin Roll Caster ◽  
Twin Roll

A vertical type tandem twin roll caster which can cast clad strip was devised and assembled. The casting of the clad strip was tried. The three layers clad strip could be cast by a vertical type tandem twin roll caster at only one process. The clad strip was connected directly from AA8079 and AA6022 at roll speed of 30m/min. The diffusion area between the strips was very narrow. The interface between the strips was clear and flat. The strips were bonded firmly.

Improvement of Porosity of Strip Using a Scraper on the Casting by a Vertical Type High Speed Roll Caster

2010 ◽  
Vol 146-147 ◽  
pp. 1108-1113 ◽  
Author(s):  
Ryoji Nakamura ◽  
Yusuke Shiotsu ◽  
Kosuke Komeda ◽  
Shinji Kumai ◽  
Hisaki Warari
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Alloy Strip ◽  
Roll Speed ◽  
Strip Cast ◽  
Twin Roll Caster ◽  
Twin Roll

Porosity occurred in the 5182 aluminum alloy strip cast by a vertical type high speed twin roll caster. The porosity was caused by high-roll-speed and low-roll-load. Improvement of the porosity was tried by a scraper. The scraper was mounted on the roll, and the scraper was moveable depend on the thickness of the solidified layer on the roll. The scraper scribed the semisolid layer to improve the porosity. The scraper was useful to decrease the porosity of roll cast 5182 aluminum alloy strip.

scholarly journals 728 Strip Casting of A5182 Aluminum Alloy by an unequal diameter twin roll caster

2006 ◽  
Vol 2006.81 (0) ◽  
pp. _7-28_
Author(s):  
Hideki INUI ◽  
Toshio HAGA ◽  
Hiroshi SAKAGUCHI ◽  
Shinji KUMAI ◽  
Kenta SUZUKI ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Strip Casting ◽  
Twin Roll Caster ◽  
Twin Roll

Roll Casting of Recycled AA5182

2011 ◽  
Vol 121-126 ◽  
pp. 4667-4670
Author(s):  
Toshio Haga ◽  
Kosuke Komeda ◽  
Kenta Mtsuoka ◽  
Shinji Kumai ◽  
Hisaki Watari
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
High Speed ◽  
Model Alloy ◽  
Drawing Ratio ◽  
Roll Speed ◽  
Roll Casting ◽  
Twin Roll Caster ◽  
Twin Roll ◽  
Fe Addition

Roll casting of the model alloy of recycled AA5182 aluminum alloy was investigated. Fe up to 0.6% was added to the AA5182 to make the model alloys of recycled AA5182. Increase of 0.6% of Fe means that the recycle was three times operated. A vertical type high speed twin roll caster was used. Some devices were operated on the twin roll caster to increase the cooling rate in order to make impurity fine. The roll speed could be increased up to 80m/min. The roll-castability did not become worse by the addition of the Fe. The LDR (limiting Drawing Ratio) was 1.9 when the Fe addition was 0.6. The deterioration of the mechanical properties by the addition of impurity Fe was very small.

Casting of Clad Strip of Al-SiCp, Magnesium Alloy Hard-Brittle Light Material by a Twin Roll Caster

2017 ◽  
Vol 893 ◽  
pp. 262-266 ◽  
Author(s):  
Toshio Haga ◽  
Kentaro Okamura ◽  
Hisaki Watari ◽  
Shinichi Nishida
Keyword(s):  
Aluminum Alloy ◽  
Magnesium Alloy ◽  
Aluminum Alloys ◽  
Magnesium Alloys ◽  
The Other ◽  
Roll Speed ◽  
Oxidizing Atmosphere ◽  
Twin Roll Caster ◽  
Light Material ◽  
Twin Roll

Casting of clad strip consisting of Al-30vol%SiCp and 1070 aluminum alloy, and clad strip consisting of AM60 magnesium alloy and AZ121 magnesium alloy was carried out in an oxidizing atmosphere by two types of twin roll casters. One was the vertical type twin roll caster equipped with a scraper and the other was the melt drag type vertical type twin roll caster, both operating at a speed of 30 m/min and a roll load of 0.2 kN/mm. The clad strip of the aluminum alloys could be cast by both twin roll casters. The clad strip of the magnesium alloys could be cast only by the vertical caster equipped with a scraper. The clad strips were bonded strongly at the interface in spite of the high roll speed and the low roll load.

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