Effect of Casting Condition on Ripple Mark and Surface Crack of Roll-Cast Al-Mg Alloy

Toshio Haga; Tomoya Okada; Hisaki Watari; Shinichi Nishida

doi:10.4028/p-jxhn6j

Paper Titles

Preface

Hot Forging of Gravity Casted Al-Mg Alloy
p.3

Structures and Mechanical Properties of Pure Titanium by Different Boriding and Nitriding Conditions
p.9

Effect of Casting Condition on Ripple Mark and Surface Crack of Roll-Cast Al-Mg Alloy
p.15

Surface Tension and Kinematic Viscosity of Multicomponent FeCuNbSiB Melt
p.23

Twin-Roll Casting of Al-4.8%Mg Alloy with Added Fe
p.29

Structures and Mechanical Properties of Pure Titanium by Different Nitriding Temperatures
p.35

Effect of Die Edge Roundness on Crack Initiation near Punch Edge in Blanking
p.41

Optimizing the Process Parameters of Hydro-Deep Drawing of Cylindrical Parts Using Fiber Metal Laminates
p.49

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Effect of Casting Condition on Ripple Mark and Surface Crack of Roll-Cast Al-Mg Alloy

Abstract:

Effect of casting conditions on ripple mark and surface crack of as-cast Al-4.7%Mg strip was investigated. A vertical type high speed twin roll caster was used. A casting speed was 30 m/min. Casting conditions were tip-shape of a back-dam plate, gap between a roll and the back dam plate and texture on the roll-surface. The texture on the roll-surface was useful to reduce the ripple mark. In bending test conducted to investigate surface crack of as-cast strip, the texture on the roll surface was effective to the reduce the crack. The position of the crack was not coin side with the position of the ripple mark. This result shows that there is no correlation between the ripple mark and the ductility or the strength of as-cast strip. Small roll load was effective to reduce the crack and degree of the ripple mark. Effect of the roll load on the ripple mark was discussed including solidification delay and seepage of Magnesium.