Tungsten

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Internal Stress in Tungsten Cemented Carbide Balls 28

Tungsten cemented carbide balls are spherical products made by sintering refractory metal tungsten carbide (WC) powder as the primary component, with cobalt (Co) or nickel (Ni) as the binder, using a powder metallurgy process. The formation of internal stress is primarily due to microstructural heterogeneity during material preparation. The specific mechanisms and impacts are as follows: I. Internal Stress Formation Mechanisms 1. Difference in Thermal Expansion Coefficients During the sintering process, the thermal expansion coefficients of the cobalt (Co) binder…

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Surface Hardness of Tungsten Cemented Carbide Balls 18

Tungsten cemented carbide balls are spherical products made from tungsten carbide (WC) powder as the primary component and cobalt (Co) or other metals as a binder, sintered using a powder metallurgy process. They offer high hardness, wear resistance, corrosion resistance, bending resistance, and high-temperature resistance, making them widely used in precision bearings, valve seals, abrasive media, instrumentation, sprayers, water pumps, oilfield equipment, and hardness testers. The extremely high surface hardness of tungsten cemented carbide balls is one of their core…

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Hardness Analysis of Tungsten Cemented Carbide Balls 21

Tungsten cemented carbide balls are powder metallurgy products made from a matrix of high-hardness, refractory tungsten carbide powder, with cobalt (Co), nickel (Ni), or molybdenum (Mo) as a binder, sintered in a vacuum furnace or hydrogen reduction furnace. Their hardness characteristics and key influencing factors are as follows: I. Hardness Range and Performance Advantages 1. Core Hardness Index The hardness of tungsten cemented carbide balls generally ranges from HRA 86-93. Some high-performance products (such as YG6x and YT15) can reach…

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Tolerance Requirements for Tungsten Cemented Carbide Balls 32

The tolerance requirements for tungsten cemented carbide balls typically vary depending on the application, industry standards, and manufacturing process. The following are some common requirements and explanations for tungsten cemented carbide ball tolerances, based on international or industry standards (such as ISO, DIN, ANSI, etc.) and typical application scenarios: 1. Tolerance Grades for tungsten Cemented Carbide Balls The tolerances for tungsten cemented carbide balls are typically categorized into different grades according to international standards (such as ISO 3290 or AFBMA).…

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Dimensional Accuracy of Tungsten Cemented Carbide Balls 20

Tungsten cemented carbide balls (typically made with a metal binder such as tungsten carbide and cobalt) are widely used in high-precision, demanding applications due to their exceptional hardness, wear resistance, corrosion resistance, and stability. Their dimensional accuracy is one of the core criteria for measuring their quality. I. Key Indicators of Dimensional Accuracy Dimensional accuracy is not limited to diameter alone; it generally encompasses the following interrelated aspects: 1. Diameter Tolerance This is the most basic accuracy indicator, representing the…

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Density and Weight Characteristics of Tungsten Carbide Balls 30

Tungsten carbide balls’ core advantages are their high density (typically between 14.5-15.0 g/cm3, with a typical value of 14.9 g/cm3) and excellent weight characteristics. Their density, approximately twice that of steel balls, directly determines their weight distribution, wear resistance, and corrosion resistance. Specific characteristics and their impact are as follows: I. Density Characteristics 1. Typical Density Range The density of tungsten carbide balls is typically between 14.5-15.0 g/cm3, with the specific value depending on the composition (e.g., the cobalt content…

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Hardness Standards and Test Methods for Tungsten Carbide Balls 40

Tungsten carbide balls, composed primarily of tungsten carbide and bonded with cobalt as a binder, are widely used in precision bearings, valves, and molds. Their high hardness and wear resistance are their core properties. Hardness reflects a material’s ability to resist local deformation, with typical values ranging from 1500–2000 Vickers hardness (HV). The specific hardness is determined by the alloy grade (such as YG series tungsten-cobalt alloys or YT series titanium-cobalt alloys) and the sintering process. The following briefly describes…

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Chemical Composition of Tungsten Carbide Balls 21

Tungsten carbide balls are spherical materials made primarily from tungsten carbide powder, a high-hardness refractory metal, combined with a binder and sintered using a powder metallurgy process. Their chemical composition can be summarized as follows: I. Core Components: High-Hardness Refractory Metal Carbides 1. Tungsten Carbide (WC) Content Range: Typically 75% to 97% of the total mass of the tungsten carbide ball, it is the primary component. Function: Provides extremely high hardness and wear resistance, forming the foundation for the high…

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Main Components and Structure of Tungsten Carbide Balls 32

The main components of cemented carbide balls are a highly hard and wear-resistant metal carbide (usually tungsten carbide WC) and a metal binder (usually cobalt Co). The structure can be understood as: hard tungsten carbide particles are encapsulated and bonded by the relatively soft metal cobalt, forming an extremely hard yet moderately tough composite material. I. Main Components of Tungsten Carbide Balls Tungsten carbide balls are not composed of a single metal, but rather a two-phase composite material. 1. Hard…

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Material Selection for Tungsten Carbide Balls 38

Tungsten carbide balls are manufactured using a powder metallurgy process, combining high-hardness refractory metal carbides as the hard phase and transition metals as the binder phase. Material selection should be centered around core performance requirements. The following is a detailed analysis: I. Hard Phase Material Selection: The Synergistic Effect of Tungsten Carbide (WC) and Titanium Carbide (TiC) 1. Tungsten Carbide (WC) Core Advantages: WC is the primary hard phase in tungsten carbide balls, boasting a microhardness of 2000-2500 HV and…

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