Patent ID: 6660110
Filing Date: 2003-12-09
Classification: C21D,C22F,Y10S

Abstract:
An apparatus insertable and removable from a heat treatment furnace for differentially heat treating a superalloy disk to obtain a dual microstructure disk, the disk comprising an inner section termed the bore portion with a bore hole, an intermediate section termed the web portion, an outer section termed the rim portion, and first and second faces on opposite sides of the disk, said disk having predetermined diameter and thickness dimensions for each of said rim and bore portions, said apparatus comprising:first and second thermal blocks respectively arranged on said first and second faces of said disk, each of said first and second thermal blocks having predetermined diameter and thickness dimensions related to said predetermined diameter and thickness dimensions of said disk by predetermined relationship, said diameters of said first and second thermal blocks being less than said diameter of said disk, said first and second thermal blocks each has upper and lower faces with the lower face of the first thermal block having an alignment pin positionable in correspondence with said bore hole of said disk and the upper face of the second thermal block having an alignment pin positionable in correspondence with said bore hole of said disk so that said first and second thermal blocks along with said disk are brought together and expose at least the rim portion of the disk; first and second alignment plates each with a diameter greater than the diameter of said first and second thermal blocks and with a periphery and having means for being respectively fastened to the upper face of the first thermal block and to the lower face of the second thermal block; and first and second outer shells located outside of the periphery of said first and second alignment plates with high temperature insulating media filling the cavity between the outer shells and thermal blocks.