High wear resistance alloy for slitting roller and manufacturing method thereof

Abstract

The invention provides a high wear-resistant alloy for a splitting roller, which is characterized in that the alloy comprises the following constituents by weight percentage: 1.9 to 3.8 percent of C, 6 to 25 percent of W, 6 to 18 percent of Mo, 3 to 8 percent of Cr, 6 to 15 percent of Co, 5 to 15 percent of V, 1.5 to 7.5 percent of Nb, 0.5 to 1.5 percent of Si, 0.3 to 1.2 percent of Mn, 2 to 8 percent of Ni, 0.5 to 2.5 percent of B, less than or equal to 0.05 percent of S, less than or equal to 0.07 percent of P, and the balance being Fe. The invention also provides a method for preparing the high wear-resistant alloy for the splitting roller. The method greatly improves impact toughness while improving the wear resistance of materials, and preparation technology is easy to control and grasp.

Description

Technical field [0001] The invention belongs to the field of metal materials, and relates to a high wear-resistant alloy suitable for manufacturing split rolls under high stress and strong abrasive wear conditions and a preparation method of the alloy. Background technique [0002] Wear is one of the main ways of material failure, especially in mining, building materials, electric power, steel mills, rolls and other industries. The service life of rolling steel is short, the amount of steel passing through the rolling groove is small, and the groove of the roll is changed frequently. The whole country consumes about tens of millions of tons of ordinary high-nickel-chromium rolls. Ordinary rolls are not wear-resistant and consume a large amount of metal materials. The use of tungsten carbide is expensive, and the explosive rolls will peel off, which affects the operating efficiency of the main machine. [0003] In order to meet the needs of different working conditions, vari...

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Problems solved by technology

The metallographic structure (quenched state) of high chromium white cast iron is generally M 7 C 3 Type carbide + martensitic matrix, M 7 C 3 The microhardness of type carbide (Hv1200~1800), the volume fraction is about 30%. Compared with some hard abrasives such as quartzite (Hv1000~1300) and corundum (Hv1800), its microhardness is not ideal and is more It is important that M 7 C 3 The morphology of the type carbide is block or chrysanthemum shape, although its distribution is discontinuous network, but it still has a great splitting effect on the matrix, which greatly reduces the impact toughness of the material, and after the matrix structure is worn out, the block shape Carbide is easy to crack, loses the protective effect on the matrix, and wears faster

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