Iron-based low-density golf head stainless steel alloy and manufacturing method thereof

Abstract

The invention discloses an iron-based low-density golf club head stainless steel alloy and a manufacturing method of same. The alloy is used for an iron club head and includes, by weight, 17.5-18.8% of Cr, 9.5-10.5% of Mn, 2.5-3.6% of Ni, 1.5-2.5% of Si, 0.05-0.09% of C, and the balanced being Fe and other unavoidable micro-scale alloy elements. The alloy has corrosion resistance and high elongation rate and is 7.42-7.62 g / cm<3> in density [rho], so that the design space of the golf club head is increased. The alloy, after solution treatment at 1050 + / - 50 DEG C for 1-2 h, is free of any aging treatment subsequently. The alloy has a biphase structural organization of ferrite [alpha] + austenite [gamma], wherein the ratio of [alpha] is 25-40%; the alloy is 630-900 MPa in extension strength, is 420-600 MPa in yield strength and has high extension ratio being 40-55%, and also has corrosion resistance in an anti-salt fog test (NaCl).

Description

technical field [0001] The present invention relates to an alloy structure: it has a two-phase structure of ferrite (α)+Worth field iron (γ), the ratio of ferrite (α) is between (5% and 40%), and the yield strength is between Between 420-600MPa, high elongation (40-55%), corrosion resistance, and density between ρ=7.42~7.62g / cm 3 , particularly with regard to an alloy that increases the design space of golf iron club heads. Background technique [0002] Golf is a sport that uses a club to hit a ball into a hole. The basic rule is to tee off the golf ball at the teeing position, overcome various natural or artificial obstacles, and push the ball into a specific hole on the green. Inside, the number of strokes used will be counted. There are a total of 18 holes in a game (par 72), and the player with the lowest cumulative total score will be the winner. [0003] A complete set of golf clubs should not exceed 14 pieces at most. According to the needs of the course and differe...

AI Technical Summary

Problems solved by technology

[0013] 4. The hitting surface of the limited ball head must be made of a single material

In addition, in the process of hitting the ball, if the yield strength of the material is not enough, it will cause the angle of the shaft to change after the use of the ball. In the past, the thickness of the iron club head was relatively thick, about 2.5-3.8mm, so the problem of deformation was less considered

However, the current design of the ball head is aimed at thinning the impact, so if the yield strength of the alloy is lower than 400MPa, the ball head may be deformed.

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