Tungsten

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High-Temperature Resistance of Tungsten Cemented Carbide Balls 36

Tungsten cemented carbide balls are primarily composed of tungsten carbide (WC) powder as the main component, with metals such as cobalt (Co), nickel (Ni), or molybdenum (Mo) as binders, manufactured through powder metallurgy processes such as vacuum sintering. This composite material, due to its unique microstructure, performs exceptionally well in high-temperature environments, effectively resisting thermal deformation and oxidation. It is widely used in high-temperature and high-pressure applications such as the petroleum, chemical, and aerospace industries. 1. High-Temperature Resistance Mechanism and…

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Corrosion Resistance Mechanism of Tungsten Cemented Carbide Balls 38

Tungsten cemented carbide balls use carbides (such as WC, TiC) as hard phase and metal binders (such as Co, Ni) as bonding phase. Their corrosion resistance mechanism comes from the chemical inertness of the hard phase, the optimization of the corrosion resistance of the bonding phase and the synergistic inhibition. I. Chemical Inertness of the Hard Phase: Corrosion Barrier WC particles possess extremely high chemical stability and virtually no reaction in most corrosive environments (such as acidic, neutral, and weakly…

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Corrosion Resistance of Tungsten Cemented Carbide Balls 33

Tungsten cemented carbide balls are precision spherical products manufactured through a powder metallurgy process using tungsten carbide (WC) powder as the primary component and a metal binder such as cobalt (Co), nickel (Ni), or molybdenum (Mo). Common grades include the YG, YN, YT, and YW series. This material is renowned for its high hardness (typically ≥90.5 HRA) and high density (approximately 14.9 g/cm3). Its excellent corrosion resistance makes it particularly suitable for use in harsh chemical environments, such as oil…

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Wear Resistance Test of Tungsten Cemented Carbide Balls 33

The wear resistance test of tungsten cemented carbide balls is an important means to evaluate their wear resistance under specific working conditions. It is often used in oil drilling, mining machinery, cutting tools and other fields. 1. Common wear resistance test methods Wear resistance test usually measures wear amount, wear rate or surface morphology change by simulating the friction and wear process in actual use. The following are several main methods: (1) Linear reciprocating friction test Principle: By applying a…

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Wear Resistance of Tungsten Cemented Carbide Balls 33

Tungsten cemented carbide balls possess exceptional wear resistance, tens to hundreds of times greater than that of traditional steel balls. They can operate stably and long-term under harsh conditions such as high loads, high speeds, and severe corrosion, significantly reducing equipment wear and maintenance costs. I. Data Supporting Tungsten Cemented Carbide Balls Wear Resistance 1. Hardness Tungsten cemented carbide balls generally have a hardness of ≥90.5 HRA (Rockwell hardness), approaching that of diamond (100 HRA) and far exceeding that of…

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Friction Coefficient of Tungsten Cemented Carbide Balls 25

The friction coefficient of tungsten cemented carbide balls depends on the contact material, surface roughness, lubrication conditions, and environmental factors (such as temperature and humidity). The following is an overview of the friction coefficient of tungsten cemented carbide balls: I. Friction Coefficient Range of Tungsten Cemented Carbide Balls 1. Dry Friction (Unlubricated): The static friction coefficient of carbide against carbide or carbide against steel is typically in the range of 0.3 to 0.6. The dynamic friction coefficient is slightly lower,…

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Internal Stress in Tungsten Cemented Carbide Balls 41

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 25

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 24

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 44

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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