High speed roll casters for aluminum alloys

Haga, Toshio

doi:10.2464/jilm.70.234

Cited by 1 publication

(3 citation statements)

References 15 publications

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“…2. Figure 2(a) shows the conventional pouring method, 3) wherein molten metal is poured in the molten metal pool on the lower roll. Figures 2(b) and (c) are the molten metal pouring methods proposed in the present study.…”

Section: Pouring Methodsmentioning

confidence: 99%

“…The UDTRC 3) was used because conveying of as-cast strip is easy compared with the VHSTRC. A schematic of the UDTRC is shown in Fig.…”

Section: Effect Of Roll Load On Surface Crackingmentioning

confidence: 99%

“…The casting speed of a conventional twin roll caster for aluminum alloys (CTRCA) is slower than 2 m/min 1) and high speed twin roll casters (HSTRCs), such as the verticaltype high speed twin roll caster (VHSTRC) 2) and the unequal diameter twin roll caster (UDTRC), 3) can cast at speeds from about 30 m/min up to 120 m/min.…”

Section: Introductionmentioning

confidence: 99%

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Reduction of Surface Crack by Modified Molten Metal Pouring Method on Al–Mg Alloy Strips Produced by Twin-Roll Casting

Yamazaki,

Haga

2024

Mater. Trans.

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In this study, cracks formed on the surface of Al-Mg alloy strips cast using a high-speed unequal-diameter twin-roll caster were observed. In addition, the effects of the roll load and the molten metal pouring method on the crack were investigated. Four types of Al-Mg alloys (AC7A, AC7B, Al-3%Mg, and Al-7%Mg) were cast into strips at roll speed of 30 m/min. The crack size decreased with decreasing roll load, and when the roll load was 4 N/mm, no cracks formed. However, the strips did not completely solidify under this low load, and conveyance was difficult due to the insufficient strength of as-cast strips. To reduce the load in the inner area along the width direction of the strips, the thickness of the solidification layer in this area was made shorter than that at the edges by modifying the molten metal pouring method. In the modified pouring method, the molten metal was poured onto the roll using a launder placed against the roll at a small angle. With this method, the edges completely solidified and had enough strength for conveyance. Moreover, cracking substantially improved, and when the distance between the edge of the molten metal pool and the pouring point was set, crack formation was almost completely eliminated. The band region at the center in the thickness direction of the strips was widened using the proposed pouring method. The tensile strength and limiting drawing ratio of strips cast using the proposed pouring method were both greater than those of the strips cast using the conventional pouring method.

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Section: Pouring Methodsmentioning

confidence: 99%

“…The UDTRC 3) was used because conveying of as-cast strip is easy compared with the VHSTRC. A schematic of the UDTRC is shown in Fig.…”

Section: Effect Of Roll Load On Surface Crackingmentioning

confidence: 99%