Center Segregation and Cross-Hatched Surface Pattern of Vertical-Type High-Speed Twin-Roll Cast Al–Si–Mg Alloy Strip Formed by Wide Rolls

An inline hot rolling was operated on 5182 aluminum alloy strip cast using a vertical type high speed caster (VHSTRC) at the speed of 60 m/min. A porosity existing at center line of the thickness and a ripple mark on the surface, these are typical defects of the strip cast by the VHSTRC, could be improved by the inline rolling. The rolling speed was as same as the roll-casting-speed of 60m/min. The temperature of the strip, when the inline rolling was operated, was 450oC. The reduction of the strip of the inline rolling was 35%.

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A high speed twin roll caster for aluminum alloy strip

Journal of Materials Processing Technology ◽

10.1016/s0924-0136(01)00673-2 ◽

2001 ◽

Vol 113 (1-3) ◽

pp. 291-295 ◽

Cited By ~ 25

Author(s):

T Haga ◽

S Suzuki

Keyword(s):

Aluminum Alloy ◽

High Speed ◽

Alloy Strip ◽

Twin Roll Caster ◽

Twin Roll

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Roll Casting and Die Casting of Si-Added Al-Mg Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1007.12 ◽

2020 ◽

Vol 1007 ◽

pp. 12-17

Author(s):

Toshio Haga ◽

Shinichiro Imamura ◽

Hiroshi Fuse ◽

Hisaki Watari ◽

Shinichi Nishida

Keyword(s):

High Speed ◽

Die Casting ◽

Sheet Forming ◽

Mg Alloy ◽

Tension Tests ◽

Roll Casting ◽

Cold Rolled ◽

Twin Roll Caster ◽

Si Content ◽

Twin Roll

Si ranging from 0.2 mass% to 2.0 mass% was added to Al-5%Mg alloy (5182) and strip was cast by a vertical type high-speed twin-roll caster at a speed of 80 m/min. The as-cast strip was cold-rolled down to 1 mm thickness and annealed. The mechanical properties were investigated using cup tests and tension tests. The limiting draw ratio (LDR) of the 5182 alloy was 2.0 and the LDR became smaller as the Si content increased. When the Si content was 2.0 mass%, the LDR was 1.8, which shows that Si-added 5182 can be used for sheet forming, if the Si content is less than 2.0 mass%. The tensile strength and elongation were almost constant when the Si content was less than 1 mass%, but decreased at 2.0 mass% Si. However, the elongation was greater than 20% at 2.0 mass% Si. For die casting, 2.0 mass% Si was determined as the appropriate content from the results of the tension tests. When the Si content is in the range from 1.0 mass% to 2.0 mass%, then the Si added Al-5%Mg has the ability to be used for both die casting and sheet forming.

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Twin-Roll Cast Al-Clad Magnesium Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.618-619.467 ◽

2009 ◽

Vol 618-619 ◽

pp. 467-470 ◽

Cited By ~ 5

Author(s):

A.K. Prasada Rao ◽

K.H. Kim ◽

J.H. Bae ◽

Geun Tae Bae ◽

Dong Hyuk Shin ◽

...

Keyword(s):

Reaction Zone ◽

Transverse Section ◽

Intermetallic Phases ◽

Alloy Sheet ◽

Mg Alloy ◽

Microstructural Investigation ◽

Twin Roll Casting ◽

Roll Casting ◽

Twin Roll Cast ◽

Twin Roll

An attempt has been made to clad Mg alloy with Al by twin-roll casting. This was done by inserting an Al sheet between the roll and the Mg alloy melt during twin-roll casting. Microstructural investigation across the transverse section of the as-cast Al-clad Mg alloy sheet reveals a very good interfacial bonding between Al and the base Mg alloy. Annealing of the Al-clad Mg alloy sheet results in the formation of layers of various intermetallic phases along the Mg/Al interface. Subsequent rolling of the as-annealed sheet significantly improves the formability of the reaction zone, as evidenced by the cracking of the base Mg alloy before the cracking of the reaction zone.

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