PURPOSE: To provide a titled shaft which improves elasticity for the purpose of increasing a carrying distance in particular and ightness by hardening a pipe formed a steel strip consisting of basic components such as C, Si, Mn or the like incorporated further therein with ≥1 kind of V and Nb then tempering the same at a required temp.
CONSTITUTION: A pipe formed from a steel strip contg. 0.45W0.80% C, ≤0.8% Si, 0.5W1.5% Mo, ≤0.030% P, ≤0.020% S, ≤0.05% Al, 0.30W1.20% Cr, and further 0.05W0.40% V, or/and 0.03W0.15% Nb is prepd. After the pipe is hardened, the pipe is tempered at a temp. of 200W400°C, by which a shaft for a golf club having ≥130kg/mm2 yield strength at 0.03% is obtd. The steel of the above- described compsn. has the high elasticity required for a shaft for a golf club and the strength for the purpose of reducing weight and has excellent pipe formability.
OOHAMA HIROHISA
IWAO TOMOYOSHI
| JPS54116321A | 1979-09-10 | |||
| JPS463202A |