Method for generating coarse-grained structures, use of said method and coarse-grained structure

摘要

Generation of coarse-grained structure on crystalline base substrate involves successively applying coating layers (1a)-(1n) of primary grains (20) having primary grain size (10) by laser beam deposit welding with primary process parameter, such that the coating layers are not epitaxially grown to prevent cracking, and irradiating the coating layers (40) at melting point by laser beam with secondary process parameter, such that melting of all or one portion of coating layers is accomplished to generate secondary grains (30) with secondary grain size (110). Generation of coarse-grained structure on crystalline base substrate involves successively applying coating layers of primary grains having primary grain size by laser beam deposit welding with primary process parameter, such that the coating layers are not epitaxially grown to prevent cracking, and irradiating the coating layers at melting point by laser beam with secondary process parameter, such that melting of all or one portion of coating layers is accomplished to generate secondary grains with secondary grain size. The secondary grains are obtained partly from primary grains of coating layers at the melting point. An independent claim is included for application of generation of coarse-grained structure on crystalline base substrate.