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The AlTi alloy or the AlTiB alloy where the Ti grain diameter which
The AlTi alloy or the AlTiB alloy where the Ti grain diameter which
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机译：AlTi合金或AlTiB合金的Ti晶粒直径
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摘要
PROBLEM TO BE SOLVED: To provide an aluminum substrate for lithographic plate, in which the occurrence of striped fault caused by the existence of Ti grains added to aluminum or aluminum alloy for the purpose of grain refining is prevented, and its production. ;SOLUTION: This aluminum substrate for lithographic plate is obtained by casting Ti-containing aluminum, applying cold rolling and/or heat treatment, and subjecting the resultant sheet to straightening and to surface roughening. At this time, the width of Ti grains existing in the surface layer of the aluminum sheet, ranging from the surface to a position at a depth of 20μm from the surface, and lenticularly elongated along the rolling direction, is regulated to ≤100μm. An Al-Ti or Al-Ti-B alloy composed of grains and having 1.0mm Ti grain size is added to molten aluminum and this molten aluminum alloy is directly cast and rolled continuously into cast plate of ≤10mm thickness by means of a couple of cooling rolls. Subsequently, either or both of cold rolling and heat treatment are applied to this cast plate to form an aluminum alloy sheet of 0.1-0.5mm thickness. Then, straightening and surface roughing are performed. By this method, the aluminum substrate for lithographic plate can be produced.;COPYRIGHT: (C)1997,JPO
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