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      Zhuzhou Sanxin Cemented Carbide Production Co., Ltd. - a professional manufacturer of hard alloys (tungsten steel), to provide you with advice on professional hard alloy technology:

   Hardness

     The hardness of cemented carbide indicates that there are two kinds of HRA and HV, and we usually use HRA. The characteristics of the WC-Co cemented carbide are: as the added hardness of the cobalt content decreases, the hardness increases as the particle size decreases, and the hardness at a high temperature decreases as the temperature increases.

  2. Bending strength

     This is a simple material performance test method that is most commonly used in cemented carbide strength testing. This method is based on CIS026 through a three-point bending test. As the cobalt content increases, the flexural strength increases, but when the cobalt content reaches about 15%, the flexural strength reaches a maximum.

   3. Compressive strength

     Cemented carbide has excellent compressive properties. Its relationship with cobalt content and tungsten carbide particle size is that the compressive strength exceeds 6 GPa when the cobalt content is 4 to 5%, but decreases with the increase of cobalt content. As the tungsten carbide particle size increases, it decreases.

   4. Fracture toughness

     Fracture toughness is an indicator used today to measure the energy and impact load required to damage a cemented carbide. Fracture toughness, also known as pressure intensity saturation coefficient (Kic), has become increasingly important in recent years. The test method is to cause the sample to crack and break by applying an external force, and the energy value required for the crack propagation to the fracture is regarded as the fracture toughness. The fracture toughness represents flexibility, and the larger the value, the more difficult the crack is to expand. As the cobalt content increases, the fracture toughness becomes larger, and becomes smaller as the particle size of the tungsten carbide decreases.

   5. Young's modulus (longitudinal elastic coefficient)

     The Young's modulus of cemented carbide is generally 2-3 times that of steel, which is an important property as a structural material. Young's modulus will decrease as the cobalt content increases.

   6. Thermal expansion coefficient

       The coefficient of thermal expansion is a very important indicator when cemented carbide is used under different temperature conditions. An example that can often be encountered: When a cemented carbide is welded to copper, it is prone to cracking, which is caused by the difference in thermal expansion coefficient between cemented carbide and copper. The thermal expansion coefficient of cemented carbide is 1/2-1/3 of steel, and the coefficient of thermal expansion increases with the increase of cobalt content.

       If you have any questions about the above technical parameters, please contact us for information on Sanxin Cemented Carbide Materials!

       Zhuzhou Sanxin Cemented Carbide Production Co., Ltd. will provide you with the most professional hard alloy (tungsten steel) solution with the most sincere attitude! For technical problems related to carbide, please feel free to contact us!