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Corrosion-resistant large-specific gravity titanium alloy sphere and manufacturing method thereof

A manufacturing method and technology of titanium alloy, applied in the direction of lift valve, valve details, engine components, etc., can solve the problems of seawater corrosion resistance, poor erosion resistance, damage to the ball in the special ball valve for lifting equipment, and short service life, etc. Achieve the effect of improving service life, enhancing reliability and performance, and achieving obvious economic benefits

Active Publication Date: 2009-07-15
LUOYANG SUNRUI TI PRECISION CASTING
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the material of the ball in the domestic lifting valve is Cr18 steel ball, which has poor seawater corrosion resistance and erosion resistance, and the service life is very short. After a period of use, the ball in the special ball valve for lifting equipment is frequently damaged.
Ball valves on boats at home and abroad are all made of steel valve materials, so that the existing problems have not been solved

Method used

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  • Corrosion-resistant large-specific gravity titanium alloy sphere and manufacturing method thereof

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Embodiment 1

[0020] Manufacturing diameter The inner ball of the floating ball valve for boats. The sphere consists of two parts: the center is the diameter Metal lead, the outside is TC4 titanium alloy with a shell wall thickness of about 2mm. The density of TC4 titanium alloy is 4.45g / cm 3 , lead density 11.34g / cm 3 , through the diameter The surface layer of the metal lead ball is covered with titanium alloy, and the density of the ball is 8.9g / cm 3 , which can better meet the density requirements of the special ball valve for lifting equipment.

[0021] The sphere is manufactured as follows:

[0022] (1) Two sets of graphite molds are manufactured: one set requires the internal aperture of the graphite mold to be , the mold is used to cast Shot put, after the casting is completed, the Shot puts are processed into higher precision shot put. Another set requires that the internal aperture of the graphite mold is , before casting the higher precision The shot is firm...

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Abstract

The invention discloses a corrosion-resistance high-specific gravity titanium alloy sphere and a manufacturing method thereof. The sphere is prepared by coating a pure titanium or titanium alloy material on a shot surface layer; the wall thickness of the pure titanium or the titanium alloy outside of the metal shot is more than 2mm. The manufacture method thereof is as follows: the shot is fixedly arranged in the spherical center of a black lead die; drilling is correspondingly carried out on the shot and the black lead wall one by one and pure titanium or titanium alloy wires are used for connection; then the titanium alloy material is molt and cast; finally a sphere cast is processed so as to meet demands. The sphere of the invention has a density approaching to a steeliness sphere which can meet the density demands of the sphere; the sphere has the corrosion resistance and eroding resistance performances equivalent to the pure titanium or titanium alloy, can improve the service life of a sphere in a floating valve used for a boat, and enhance the reliability of a floating device. The application prospect of the invention is good and the economic benefit is obvious.

Description

technical field [0001] The invention relates to a casting titanium alloy material technology, in particular to a novel corrosion-resistant high specific gravity titanium alloy sphere and a manufacturing method thereof. Background technique [0002] The inner ball of the floating ball valve for boats is raised and lowered by the water pressure, the ball floats up when it is working, and the ball is closed by its own weight when it stops working. At present, the material of the inner ball of the domestic lifting valve is Cr18 steel ball, which has poor seawater corrosion resistance and erosion resistance, and has a short service life. Ball valves on boats at home and abroad are all made of steel valve materials, so that the problems that have always existed have not been solved. [0003] Therefore, there is an urgent need for a corrosion-resistant titanium alloy ball with a large specific gravity, which can solve the corrosion problem of the ball in the floating ball valve, g...

Claims

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Application Information

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IPC IPC(8): F16K1/14F16K1/32F16K31/12
Inventor 周洪强杨学东陆峻枫
Owner LUOYANG SUNRUI TI PRECISION CASTING
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