Fabrication of Mg Alloy Strips by Strip Casting

Continuous fabrication of bulk amorphous alloy sheets by twin-roll strip casting

“…It shows that the cooling rates are in the range of 252-714 K/s, which are similar to the values obtained for twin-roll strip casting of Al and Mg alloys [9,[11][12][13][14]. As expected, the surface region at the roll nip area shows a lower temperature and a higher cooling rate than the mid-thickness region at the roll nip area, regardless of rotating speed of rolls.…”

“…Since the water cooled Cu is used as the roll material, the present strip caster can give a faster solidification rate than the one made of steel. Previous studies showed that a solidification rate of 10 2 -10 3 K/s can be achieved for Al and Mg alloys by the present strip caster [9,[11][12][13][14]. This solidification rate is somewhat slower than that of rapid solidification but faster than that of DC casting.…”

“…Fig. 1 shows the roll gap area of the horizontal strip caster producing AZ31 Mg alloy sheet [9,[11][12][13]. A slot type ceramic nozzle is used to achieve a uniform flow across the width.…”

“…Twin-roll strip casting process combines casting and hot rolling into a single step, having an advantage of one-step processing of flat rolled products [8][9][10]. Besides being such a cost-effective process, twin-roll strip casting also offers the much reduced cooling rate over conventional continuous or direct chill casting [11][12][13][14]. One of the challenges one might face for the application of twin-roll strip Intermetallics 14 (2006) casting in fabricating sheet products of bulk amorphous alloys is that high enough cooling rates might not be achieved during twin-roll strip casting to form amorphous structure since bulk amorphous alloys generally have much lower thermal conductivities than conventional alloys [15,16].…”

Microstructure and Mechanical Properties of AZ31 Magnesium Alloy Strip Produced by Twin Roll Casting

“…And the works related to this subject have been reported. 2,3) The present work is aimed at establishing a cost-effective process of manufacturing magnesium alloy strips with high formability by directly producing magnesium alloy strips from molten metal using twin-roll casting. In this paper, the microstructure and mechanical properties of AZ31 alloy strips produced with various kinds of twin-roll casting conditions are investigated.…”