Heat treat fixture apparatus and method of heat treat hardening thin metal work pieces

摘要

A heat treat fixture is provided for supporting thin sheet-like work pieces, such as metal gasket layers, during heat treatment to achieve uniform hardness and properties of the work piece while preventing warpage. The fixture has porous, planar support walls that engage the opposite sides of the work piece. The walls include a coarse porous exoskeleton of expanded metal and an inner liner of wire mesh panels that are considerably finer than the coarse exoskeleton. The porous walls permit liquid heating and cooling media during heat treatment to flow freely through the walls for intimate contact with the work piece to achieve rapid uniform heating and cooling. The work piece is supported by the porous walls against movement out of its plane while being permitted to expand and contract within its plane to minimize warpage.