How to improve the performance of marble tools

A rare earth element

    marble products are mainly made by the powder metallurgy method, and its multi-carbide matrix elements, rare earth elements to improve the performance of carbide on the marble tool performance is expected to also play a role: (1) the addition of rare earth elements can enhance the infiltration of matrix metal to marble, and increase bonding capacity; (2) the addition of rare earth elements can improve the matrix material of the bending strength, wear resistance, impact resistance, which enhances the quality of marble tools; (3) rare earth elements can reduce the melting point bonding metal to reduce the sintering temperature of marble products, thereby reducing the high temperature caused by hot pressing of marble quality.

    2 SHS technology

    SHS SHS is also referred to as combustion synthesis, was developed in the past 20 years, and rely on exothermic chemical reaction to prepare their own materials, new technologies. Typically, the matrix addition of marble, because of the marble's "mixed" effect, the matrix of the bending strength decreased, but by reactive hot pressing in the marble and carbide buffer layer formed between the matrix, the matrix decrease in bending strength to be much smaller.

    3 matrix with pre-alloyed metal powder

    Matrix pre-alloyed metal powder has the following advantages: (1) melting point lower than the melting point of a single element can make some high-strength metal alloy and then decreased through the melting point, in order to achieve the requirements of sintered marble products; (2) alloy and single elements of metal, compared with high mechanical properties, easy-to-matrix marble products meet performance requirements; (3) alloy stronger antioxidant activity than the single elements, sintering performance, easy to store; (4) than the mechanical mixture of pre-alloyed powders powder uniformly good infiltration of the marble; (5) with a single melting point alloy powder, thereby avoiding the sintering of powder matrix mechanical mixing the ingredients most often appear first, segregation and low melting point metal melting and enrichment, and easily oxidized, volatile and other defects, which can guarantee the quality of marble products, products are also much improved mechanical properties.

    4 Application of activated sintering

    Sintering is the use of chemical or physical measures is lower sintering temperature, sintering speed up the process, or to sintered density and other properties are improved.

    5, reasonable structure design

    6 marble surface metallization

    In the Fe, Cu, Co, Ni-based binder such as made of marble tools, due to the covalent binding of the marble crystal and no chemical affinity for the binder, the interface does not infiltrate other reasons, the marble particles can be mechanically to set in the binder matrix. The role of the grinding force, when the marble grits are exposed to the maximum cross-section mill, before the metal matrix marble particles on the lost card off on their own solid and make the life of marble tools and process inefficiencies, marble grinding effects are not fully cut. Therefore, the marble surface with a metal feature, you can improve the life of marble tools and processing efficiency. Its essence is will become the key elements such as Ti or alloy plated directly attached to the marble surface, through the heat treatment temperature is uniform marble surface chemical bonding layer. Treated by plating with marble grits in the marble tool manufacturing solid-state sintering hot or cold liquid phase sintering process, the coating reacts with the chemical bonding of marble to marble surface metallization. On the other hand, the metal of the marble surface can successfully bond with the metal matrix to achieve metallurgical bonding between the metal. Therefore, the titanium and alloy liquid phase sintering marble on the cold and hot solid-phase sintering has broad applicability. This matrix alloy on the marble grits in the consolidation of power increases, reducing the use of the process of marble abrasive tools in the shed, thereby increasing the life and efficiency of marble tools [7]. Used to change the current method of surface properties of marble are chemical plating, vacuum deposition and ion plating and so on.

    7 ultrafine or nano-materials by

    The finer the powder size, the larger surface area, surface energy higher, the more easily the sintering process, the higher mechanical properties.

    Nano-materials, nano-technology manufactured using nano-scale objects. Because extremely small particles of nano-materials, sharp increase in specific surface area, surface activity is very strong, in powder metallurgy, petrochemical, aerospace, defense, energy, machinery, electronics and other fields prospecting has broad application prospects.