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Shaft for golf clubs and method for producing same

A technology for golf clubs and manufacturing methods, which is applied to golf balls, golf clubs, manufacturing tools, etc., can solve the problems of golf club shafts such as the reduction of fracture strength and failure strength, and achieve less uneven toughness, The effect of high strength and toughness

Active Publication Date: 2019-10-25
NISSHIN STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the steel pipe used as a material for conventional golf club shafts is thinned or reduced in diameter, the breaking strength and breaking strength of the golf club shaft will decrease.

Method used

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  • Shaft for golf clubs and method for producing same
  • Shaft for golf clubs and method for producing same

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Experimental program
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Embodiment

[0058] Hereinafter, although an Example is shown and this invention is demonstrated concretely, this invention is not limited to a following Example.

[0059] After pickling the hot-rolled steel strips having the compositions shown in Table 1 below, annealing and cold rolling were repeated to produce cold-rolled steel strips (polished steel strips) with a thickness of 0.7 mm. Next, the cold-rolled steel strip was cut into steel sheets with a width of 60 mm, formed into open pipes by roll forming, and then resistance-welded at both ends in the width direction to manufacture welded steel pipes with a diameter of 19 mm. . After the obtained welded steel pipe was drawn into a shaft shape, it was heated and held at a predetermined temperature for 10 minutes, and then quenched in 60° C. oil. Next, a tempering treatment of heating and holding at a predetermined temperature for 15 minutes followed by air cooling was performed to obtain a golf club shaft. In addition, the heating tem...

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Abstract

A shaft for golf clubs has a metal structure which contains from 0.4% by mass to 0.65% by mass of C, more than 0% by mass but 0.80% by mass or less of Si, from 0.1% by mass to 1.50% by mass of Mn, more than 0% by mass but less than 0.30% by mass of Cr and at least one element selected from among the group consisting of from 0.05% by mass to 0.40% by mass of V, from 0.03% by mass to 0.15% by mass of Nb and from 0.01% by mass to 0.10% by mass of Ti, with the balance made up of Fe and unavoidable impurities. This metal structure comprises undissolved cementite in an area ratio of 0.5% or less.

Description

technical field [0001] The present invention relates to a steel shaft for a golf club (hereinafter referred to as a "golf club shaft") and a manufacturing method thereof. Background technique [0002] The shaft for golf clubs requires strength so as to improve the flight distance and handleability of the ball, and also from the viewpoint of safety so that it does not break or break during use. In addition, in recent years, there has been an increasing demand for lightweight golf club shafts. [0003] In order to reduce the weight of the golf club shaft, it is necessary to make the golf club shaft thinner, smaller in diameter, or the like. However, if the steel pipe used as the material of the conventional golf club shaft is thinned or reduced in diameter, the breaking strength and fracture strength of the golf club shaft will decrease. Therefore, in order to achieve the same safety as conventional golf club shafts and to reduce the weight, it is necessary to increase the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A63B53/12A63B102/32
CPCA63B53/12B21C1/003B21C37/08A63B2209/00B23K2103/16B23K2101/06C21D1/18C21D6/008C21D6/005C21D6/002
Inventor 久保宽典
Owner NISSHIN STEEL CO LTD