Patent ID: 6117564
Filing Date: 2000-09-12
Classification: B23K,B23P,C21D,Y10T

Abstract:
An article repaired by a method comprising the steps of:depositing at least a first weld repair layer on a surface of the article so as to form a heat-affected zone in the article beneath the surface the first weld repair layer being formed of a 0.5 Cr-1 Mo low-alloy steel;locally heat treating the first weld repair layer and the heat-affected zone at a temperature above the critical A.sub.1 temperature of the article, the heat treating step reducing the hardness of the first weld repair layer and at least a portion of the heat-affected zone; and thendepositing at least one additional weld repair layer on the first weld repair layer without forming additional heat-affected zone beneath the surface of the article, the additional weld repair layer being formed of a 0.5 Cr-1 Mo low-alloy steel;wherein the article comprises the heat-affected zone beneath the surface of the article, the first weld repair layer on the surface of the article, and the at least one additional weld repair layer overlying the first weld repair layer, the at least one additional weld repair layer being in an as-welded condition without a post-weld heat treatment so as to be harder than the first weld repair layer.