Patent ID: 6064030
Filing Date: 2000-05-16
Classification: B23K,C22C,F25C

Abstract:
A method of manufacturing a rotary shaft having a solid body portion and a pair of coaxial journals integral with opposite end surfaces of the solid body portion, comprising the steps of:preparing a hollow journal base metal separately from the solid body portion of said rotary shaft for providing at least one of the coaxial journals of said rotary shaft;forming a layer of anti-abrasive and anti-corrosive alloy in a cylindrical surface of said hollow journal base metal by build-up welding or hard facing while said hollow journal base matal is separated from the solid body portion of said rotary shaft, without preheaing said base metal; andthereafter connecting one end of said hollow journal base metal to the corresponding one end surface of the solid body portion of said rotary shaft by friction welding.