No. 1 Golf Head Titanium Alloy MIM Parts

Product Description

Application of Titanium and Titanium Alloys on Golf Heads

Since March 1990, Japan's JOY company sold titanium golf heads for the first time in the world, and opened the prelude to titanium golf clubs. JOY cooperated with Chuantie, and Mizuno cooperated with Mitsubishi Materials to make titanium golf clubs into products. Chuantie's club head is made of Ti-6Al-4V titanium alloy, the upper surface and hitting surface of Mitsubishi material club head are made of Ti-6Al-4V titanium alloy, and the bottom and neck are made of pure titanium.

This article briefly introduces the status of titanium materials and titanium alloys used in golf clubs currently on the market.

2. Development and changes of golf club head materials

There are also wooden golf clubs. In this article, it refers to the #1 wooden stick (commonly known as the club), because in addition to this, there are clubs and iron clubs used for flat balls. Use expensive titanium alloy bats. In order to know which of the 14 clubs used in the golf course has the greatest flight distance, it is natural to increase the ball speed, and the club is longer and lighter in weight, and the volume of the club head is preferably larger. Specifically, if the weight of the club head is about 190g and the volume of the ball head is more than 300ml, the specific gravity can be simply calculated as 190÷300=0.63. If the specific gravity is lower than this, the impact force when colliding with the ball is close to 1t , Such tests have been carried out many times in order to clarify the extremely harsh conditions, but the material used in the club head has its own characteristics.

Persimmon wood has been used for wooden bats since ancient times because it has the lightest specific gravity of all woods and has high strength. The bottom of the ball head is made of Al plate, and the hitting surface is made of resin. In order to adjust the weight of the bottom, lead is added to it. The weight of the ball head reaches 200g, and the volume is limited to 190ml. between.

Metal golf club heads (dangan) were first developed in Japan in 1981. With a volume of 150ml, it is smaller than a persimmon head, but it has a very high hitting rate. This is because it flies faster than the head of a persimmon wood club. The volume is 150ml. Although it is not as small as the persimmon wood bat, it is very popular in the market. Since then, the era of metal ball heads has entered. The head material of the club was originally made of high-strength stainless steel - SUS431 precision casting. At that time, the precision casting products of iron ball heads were mainly SUS304 and SUS431, but the high-strength SUS431 was successful. But it didn't take long before there was a claim caused by the concave of the hitting surface, and the person in charge of Dangan development decided to replace the material used with SUS630 (17-4PH). The tensile strength of SUS431 is 840 MPa, while the tensile strength of SUS630 is only increased by 1.070 MPa, but its corrosion resistance is better than that, so this becomes the reason for replacement. Soon the SUS431 ball head disappeared from the market, and the SUS304 ball head also suffered the same fate. Only the SUS630 ball head has been popular for a short time. This is because the strength, corrosion resistance, castability, cost, etc. of the ball head are better, and the most important thing is the depth of its mirror polishing, the high-grade sense of its color, and its surface hardness. Higher, even with small scratches, its luster can be maintained for a long time, so it is very suitable for golf heads. From this point of view, SUS630 has good comprehensive performance as a golf ball, and it is worthy of being a high-grade stainless steel alloy.

Even so, SUS630 has not been used as a golf club head for a long time, and the biggest reason is its small size. Instead, it is a carbon ball head, which is based on graphite fiber and then thermoformed with epoxy resin, the so-called CFRP, and the inside of the ball head is a hollow structure. As we all know, graphite fiber is extremely strong and lightweight, so it is a very suitable material for bats. The volume may be more than 200ml, and the preparation methods are also different. There are also horizontal stripes of graphite fibers floating on the surface, including long fibers and short fibers. In the fierce competition of price, because of its excellent performance, combined with the short fiber mixed with ABS resin, and can be produced by injection molding, its price is naturally surprisingly cheap. However, carbon rod heads have not become the mainstream, mainly because the standards for showing the performance of CFRP are not uniform, and at the same time, it is difficult to see the performance of the product from the appearance. The most important thing for consumers is the reliability of the product. In other respects, the durability of the surface and the cost of molds in manufacturing have led to the fact that the material did not become popular in the end.

From metal to carbon, and from metal to titanium heat, this is a development process of golf clubs. Bats made of new materials are due to their higher batting averages. At the same time, if the function of the bat using new materials is to be improved, the cost will naturally rise. But it also gives people an illusion that the performance of a high-priced golf club is naturally good. Aluminum, in the mid-90s, was the heyday of aluminum that won the volume race. In the early stage of aluminum alloy, duralumin (7075) was used as the ball head material. The tensile strength of 7075 T6 material is about 600MPa, so it can be considered as a bat with high specific strength, but due to the presence of titanium, it does not know when it disappeared. In fact, aluminum alloy ball joints have experienced several ups and downs in the market. The main reason why aluminum cannot be designated as a ball head material is because of corrosion resistance problems, and surface treatment is necessary. The most suitable surface treatment is anodizing, but because of its low surface hardness, it is difficult to solve the problem of durability.

Finally, let me introduce the good use of titanium on No. 1 Golf Head Titanium Alloy MIM Parts. That is, the iron ball head with only 3mm thick titanium plate embedded in the hitting surface, because of the use of a small amount of titanium, the performance of the ball head is greatly improved, and its performance and price ratio is also good.

3. The relationship between the function and material of the golf club head

The higher the rigidity of the head, the better the flight of the bat. This is common sense in the era of persimmon wood bats. The hitting surface of persimmon wood is embedded with a table-shaped resin called a spherical insert. In order to improve the reinforcement and durability of the ball collision part, the material has gradually evolved into paper fiber, ABS resin, and CFRP. In the era of CFRG embedding with high hardness and rigidity, the flight range has been greatly improved. In the era of wooden ball heads, there are examples of setting 3 or 4 reinforcements vertically inside the hitting surface. This is also to increase the rigidity of the hitting surface.

But in the spring of 1997, in the "Titan Titanium", Maluman made the wall thickness of the hitting face thinner, curved the hitting face, and controlled the deformation of the ball to prevent energy loss and increase the flight distance, so it used SP. -700 titanium alloy. In the second year, another company also published the impedance matching theory to bring the same rebound force to the hitting surface, and the closer the natural vibration number of the hitting surface is to the spherical surface. The energy of the ball head can be effectively transmitted to the ball, and the flight distance is improved. This product sold well in the market at that time.

One of the golf rules stipulated by R&A and USGA is: "The design should avoid the elastic effect that will adversely affect the movement of the ball at the point of impact on the hitting surface."

But in fact, the batting face is thinned, which increases the flight distance due to the elastic force. The thinning of the hitting face of most bats has caused a big problem in the world golf industry.

The USGA announced violations of golf rules before April 2000, and reported violations of bats with a coefficient of repulsion over 0.830 in June.

On the other hand, R&A, which represents the Japanese golf industry, gave up hope for the elastic effect rule in September, and published the results of "research, the current ball has a higher rebound coefficient than the early metal ball, but the flight The improvement has not had an impact on the game of golf."

The current state of the golf industry in the world is the coexistence of double standards.

The rule-breaking bats are not used in American golf, but they are used in European and Japanese games as well. In this way, today's Japanese golf clubs are still competing for the thinning of the hitting surface, which has caused a high rebound hitting surface. In the well-known heyday of titanium, many new titanium alloys appeared in the competition for such a high rebound hitting surface.

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