Co-Ni BASE ALLOY, POWER SPIRAL SPRING OBTAINED BY USING THE Co-Ni BASE ALLOY, AND ITS PRODUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a power spiral spring which has high output torque, excellent durability and corrosion resistance, and to provide its production method.;SOLUTION: The power spiral spring is made of an alloy having a composition comprising, by weight, 25 to 45% Co, 25 to 40% Ni, 18 to 26% Cr, 3 to 11% Mo, 0.5 to 9% W, 4 to 13% Mo and W in total and 1.1 to 5% Fe, and containing deformed twin crystals in a host phase.;COPYRIGHT: (C)2005,JPO&NCIPI