| 摘要 |
<p>A process for cladding a substrate 1 is disclosed. The process comprises the steps of (i) directing an energy beam 2 onto an area 3 of a surface 4 of the substrate 1 to create a pool of molten material 5 at the area 3 of the surface 4, (ii) directing a stream 6 of particles 7 toward the pool of molten material 5 so that at least a first portion of the particles 7 enters the pool of molten material, iii allowing the pool of molten material 5 to cool and solidify thus trapping a second portion of the particles 7 in the solidified pool of material 8 to form trapped particles 71, wherein the energy beam 2 directed at the area 3 of the surface 4 is in the form of a energy pulse and the stream 6 of particles 7 is in the form of a pulse of particles 7, wherein the energy pulse is ended or the energy beam 2 is redirected or the energy beam 2 is reduced in power before the particles 7 enter the path of the energy beam 2 and before the particles 7 enter the pool of molten material 5, and wherein the ending of the energy pulse or the redirection of the energy beam 2 or the reduction in power of the energy beam 2 is embodied such that a substantial melting, fusing together or change in shape of the particles 7 by the energy beam 2 is avoided. The invention further relates to an apparatus 16 for carrying out said process. The present invention further relates also to the use of the process or apparatus 6 in cladding turbine components and to clad substrates obtainable by said process.</p> |
