Patent ID: 6127643
Filing Date: 2000-10-03
Classification: B23K,C21D

Abstract:
A method for extracting heat from the trailing edge of a weld, the said trailing edge of weld having an interface between the solidified surface and solidifying cup of molten metal beneath it, comprising steps of(a) depositing a fusible or evaporating material on the said trailing edge of weld;(b) the said deposited material having melting or evaporating point lower than the solidification temperature of the said solid surface at the said trailing edge of the weld;(c) the said deposited material melting or evaporating on the trailing edge, the said solidified trailing edge forming interface covering on the solidifying metal beneath it, the said solidifying metal being at temperature higher than the solidified surface over it,(d) the said deposited material extracting heat from the said solidifying metal through the said solidified metal surface at the said trailing edge.(e) providing width of the deposited material equal to the width of the said weld.(f) the said covering incubating the solidified micro structure beneath the said solidified surface.