Inventors:
John M. Hyzak - Shrewsbury MA
Timothy E. Howson - Westboro MA
Wilford H. Couts - Northboro MA
Steven H. Reichman - Worcester MA
Hugo E. Delgado - Arlington MA
Daniel D. Kruger - Cincinnati OH
Michael E. Sauby - Cincinnati OH
Sulekh C. Jain - Cincinnati OH
Bruce P. Bardes - Montgomery OH
Richard G. Menzies - Wyoming OH
Swami Ganesh - West Chester OH
Assignee:
Wyman-Gordon Company - Worcester MA
International Classification:
B23K 2002
B23P 1504
B21K 128
B21K 300
Abstract:
Two pieces of metal are bonded together at a surface by placing the two pieces into contact at the surface and forging the two pieces in a die which causes substantial displacement of the metal originally at the surface in a direction parallel to and outwardly from the edges of the surface. In this way, many of the defects which are potentially present at the original surface are displaced with moving metal away from the original contact between the two pieces of metal into sacrificial ribs and the remaining defects are exposed to significant strain. A portion of the displaced metal which contains many of the defects and which forms the sacrificial ribs is removed from the resulting bonded work piece as the sacrificial ribs are removed from the work piece. The result is a bond with superior properties and with a bond surface which can be located very precisely. This system is particularly appropriate for forming dual-alloy high-pressure turbine disks for gas turbines in which an annular peripheral ring of a second super-alloy is bonded to a central core of a first super-alloy.