SCREEN AND METHOD OF MAKING THE SAME

摘要

A screening assembly (30) and method where each support ring (52, 54) is bonded to a perforate screen section (36) by bonding material (116) that preferably is brazing material. There is a joint (112, 114) between each ring and section in which material is deposited. The joint includes mating faying surfaces (100, 102, 106, 108) offset relative to an axis of the assembly. In making it, sections and rings are assembled with material disposed in each joint. The material is heated to a temperature at or above which brazing occurs. Preferably, the sections are also annealed as a result of heating. In another preferred method, heating also causes boron diffusion of the section to occur. To ensure that the faying surfaces are wetted with molten brazing material, a vacuum is applied at least during brazing.