초록 ▼

The invention relates to a method for manufacturing thin-walled pipes, which are made of a heat-resistant and wear-resistant aluminum-based material. The method comprises the providing of a billet or a tube blank made of a hypereutectic aluminum-silicon AlSi material, possibly a subsequent averaging

The invention relates to a method for manufacturing thin-walled pipes, which are made of a heat-resistant and wear-resistant aluminum-based material. The method comprises the providing of a billet or a tube blank made of a hypereutectic aluminum-silicon AlSi material, possibly a subsequent averaging annealing, the extruding of the billet or of the tube blank to a thick-walled pipe, and the hot deformation of this pipe to a thin-walled pipe. Such a method is in particular suited for the production of cylinder liners of internal combustion engines, since the produced liners exhibit the required properties in regard to wear resistance, heat resistance and reduction of pollutant emission.

대표청구항 ▼

[ We claim:] [1.] A method for manufacturing liners for internal combustion engines made of a hypereutectic aluminum silicon AlSi alloy comprising the steps of spray compacting an Al alloy melt to obtain starting structures, wherein the contained primary silicon Si particles have a size of from 0.5

[ We claim:] [1.] A method for manufacturing liners for internal combustion engines made of a hypereutectic aluminum silicon AlSi alloy comprising the steps of spray compacting an Al alloy melt to obtain starting structures, wherein the contained primary silicon Si particles have a size of from 0.5 to 20 .mu.m; maintaining the starting structures at an extrusion temperature of from about 300 to 550.degree. C.; extruding the starting structures to thick-walled pipes having a wall thickness of from 6 t 20 mm; and reducing the wall thickness of the thick-walled pipes by a hot-deformation process at temperatures of from 250 to 500.degree. C. from 1.5 to 5 mm.