A carbide rotary tool cutting edge portion intermediate form that is an intermediate form of the cutting edge portion, the cutting edge portion intermediate form having a recessed portion that defines a bottom face and an inner circumferential surface.

Tthe cutting edge portion intermediate form being made from cemented carbide that has been pre-sintered at a second temperature that is lower than the first temperature; inserting the front end of the support portion intermediate form into the recessed portion provided in the cutting edge portion intermediate form; and sintering the cutting edge portion intermediate form and the support portion intermediate form together in a state of double face contact in which the end face of the front end of the support portion intermediate form is in direct contact with the bottom face of the recessed portion and the outer circumferential surface of the front end of the support portion intermediate form is in direct contact with the inner circumferential surface of the recessed portion.


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Carbide rotary cutting tools (i.e., cutting tools driven to rotate) are commonly employed in machining operations such as, for example, drilling, reaming, countersinking, counterboring, end milling, and tapping. Such tools are conventionally manufactured with a non-hybrid solid monolithic construction. The manufacturing process for such tools involves consolidating metallurgical powder (comprised of particulate ceramic and metallic binder) to form a compact. The compact is then sintered to form a cylindrical tool blank having a monolithic construction. As used herein, the term “monolithic construction” means that a tool is composed of a solid material such as, for example, a cemented carbide, having substantially the same characteristics at any working volume within the tool. Subsequent to sintering, the tool blank is appropriately machined to form the cutting edge and other features of the particular geometry of the rotary cutting tool. Rotary cutting tools include, for example, drills, end mills, reamers, and taps.



Rotary cutting tools composed of cemented carbide are adapted to many industrial applications, including the cutting and shaping of materials of construction such as metals, wood, and plastics. Tools made of cemented carbide are industrially important because of the combination of tensile strength, wear resistance, and toughness that is characteristic of these materials.


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A cemented carbide end mill includes a shank and a blade joined to the leading end of the shank which are each made of the cemented carbide alloy. In the manufacturing process of the cemented carbide end mill, first, a shank intermediate manufacturing process for manufacturing a shank intermediate product, which is the half-sintered product of the shank, and a blade intermediate product manufacturing process for manufacturing a blade intermediate product, which is the fully sintered product of the blade, are respectively carried out, secondly, the protrusion of the blade intermediate product is inserted into an insertion hole in the shank intermediate product to form an integrated chip intermediate product. The chip intermediate product is fully sintered, and then cobalt grains are liquid-phase-sintered at a boundary part between the inner circumferential surface of the insertion hole of the shank intermediate product and the outer circumferential surface of the protrusion of the blade intermediate product. Accordingly, the shank intermediate product and the blade intermediate product are strongly joined each other.


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Most material used in  badminton racket has good strength, good durability and resistance to vibration and shock performance.But they can not meet the demand of  higher weight.Every badminton racket need to label its weight when in the match. General standard is U, 2U, 3U, 4U.Mostweight of the  carbon badminton racket is 2U (90-94 g) or 3U (85-89 g), 4U (80-84), and alumium badminton racket is generally u(95-99 g), there are a few all-carbon badminton rackets’weight is down to 80 grams.When it be use is too lightweight to be drift, smash is insufficient,and can not be strength and emphasis enough on offensive players.Since the weight of tungsten alloy counterweight that may meet the need of badminton rackets, tungsten alloy badminton racket counterweight become the most popular badminton racket in match.

Balance point of badminton racket is closer to the head of the racket, is called "head heavy".If the balance point closer to the handle of the paddle, it is called "head light".General equilibrium is from the bottom of the racket up, measured in centimeters and inches.Tungsten alloy badminton racket counterweight is more suitable for Defense, and  control of players as well as the pursuit of speed players, because of the racket of the continuous swing speed will be a lot faster.Through the using of tungsten alloy counterweights can make the same type of badminton racket of with different balance point.

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Golf Club Head: golf club head counterweight includes a balance, balance of golf club heads.Cobra-like tungsten alloy golf counterweights are from multiple weights and snake eyes and golf club heads.Formed a weight cavity install tungsten golf ball counterweight is now a significant part of this golf club balance weight material.

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when tennis players played, designed to control the ball as much as possible the maximum points.When a ball is hit by the location best suited, and this are known as "sweet". In addition, if a player tries to hit the ball squarely, racket head normal to the direction of flight of the ball. So if both players use the same rackets, and two different players swing the same racket is slightly different.In addition, due to the weight of the tennis racket and made with the overall structure is fixed, only in this way can implement different rackets have a different weight or weight distribution.Tungsten alloy counterweight applies to needs of such material.

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tungsten alloy fishing sinker is a kind of tungsten alloy material used in the production of fishing tackle. Since the good performance of tungsten alloy fishing sinker, which are density, small size, shapes, its good for every section of choice. Tungsten alloy fishing sinker that is high density, corrosion resistance, hardness characteristics, made of tungsten alloy counterweight become the preferred manufacture fishing sinker materials.

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There are four parts barrel, dart cylinder head, shaft, and flights of one dart. Barrel parts made of tungsten alloy, so call darts tungsten heavy alloy dart. Focus area of the Dart is Barrel, Dart-throwing control area, is made of tungsten alloy counterweight material.For darts, and high density is very important, because the density of darts could make dart center more stable, so the darts for high precision machining is necessary. Tungsten heavy alloy become the most popular material to made darts ,as the reason of wear-resistant because of high density tungsten alloy and form the barrel-shaped compact group.

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Nowadays, tungsten alloy counterweight material is mainly used for darts, fishing sinker, golf accessories, hand weights, ski balance weights, tennis rackets, badminton racket counterweight and so on.This article will give brief description of tungsten alloy counterweight used in some related products.

Tungsten alloy counterweight material become more widely used in sports fields. Due to its great performance of the high density and small volume, high melting point and has high hardness, excellent resistance to abrasion and high ultimate tensile strength, high toughness, good machinability, non-toxic, high impact resistance and crack resistance and environment-friendly.

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A carbide downhole tool comprises a tubular body for location in a tubular member, such as a drill string, and defines a through bore and a number of circumferentially spaced ports . A valve member which may be in the form of a piston sleeve is mounted in the bore and is movable relative to the body between a first position in which fluid may flow through the port and a second position in which the valve member closes the port , the valve member being movable between the first and second positions by application of differential fluid pressure. Movement of the valve member is provided by a cam arrangement including a circumferentially extending cam groove and a cam follower .


A method for fabricating a carbide composite for a downhole tool, comprising: depositing a first layer on a substrate, the first layer comprising one or more first carbides, first metal binders, first organic binders, or a combination thereof; depositing a second layer at least partially adjacent the first layer, the second layer comprising one or more second carbides, second metal binders, second organic binders, or a combination thereof, and wherein the first and second layers have a different particle size, particle shape, carbide concentration, metal binder concentration, or organic binder concentration from one another; and binding the first and second layers to form the carbide composite.


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