Published: Jan 1986
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The specification and manufacture of a number of special forgings against severe schedule constraints for a novel offshore application provided an interesting experience of coordination between forging works, machine shops, and a design and management contractor. The two major types of HY80 forgings and their significant design and service features are described. The background to the material and manufacturing route selection procedure is outlined. The findings of investigative work to determine the influence of post heat treatment cooling rates on the toughness of the material are briefly presented. Procedural aspects of the fabrication processes used to complete the components are included. Comparative data on the surface and midsection toughness of other thick-walled HY80 forgings at different testing temperatures are presented.
industrial forgings, low-alloy steel, residual stresses, embrittlement, fabrication
Project manager, Brown & Root, Ltd., Hampshire