Ultra-fine grain high-nickel-chromium molybdenum infinitely chilled ductile cast iron and composite roll thereof

Abstract

Ultra-fine grain high Ni-Cr-Mo indefinite chilled cast iron belongs to roll materials used for rolling large vessels. The component comprises the followings based on the weight percentage: 2.9-3.7% of C, 0.6-1.2% of Si, 0.4-1.2% of Mn, 3.01-5.00% of Ni, 1.00-2.00% of Cr, 0.20-0.60% of Mo and Fe being the balance. The component also comprises 1-3% of antimony, which substantially eliminates the network structure of the carbide, causes the structure to be more dispersed, changes the metallographic structure and property of the materials, effectively combines the wear resistance and hot crack resistance of the materials and comprehensively prolongs the service life of the materials.

Description

Technical field [0001] The present invention is aimed at the improvement of the rolling large -scale ships with roll materials, one nickel chromium molybdenum, unlimited cold and hard cast iron, especially involving a super fine for high -rolling requirements, high abrasion resistance and high heat -resistant cracks.The grain high -nickel chromium molybdenum is unlimited and cold and hard cast iron, and it also provides a composite roll made of this material. Background technique [0002] The existing plate with hot-rolled cold rolling materials, nickel chromium molybdenum unlimited cold hard cast iron (IV) (GB / T1504-91), ingredients: C: 2.9-3.7 %, SI: 0.6-1.2 %, mn: 0.4-1.2 %, Ni: 3.01-5.00 %, CR: 1.00-2.00 %, MO: 0.20-0.60 %.This material has a flat strip of graphite and a mesh structure of carbides, so the substrate strength is relatively low and the service life is not long.The crack performance is also poor. During the rolling process of rolling rolling, the rolling volume w...

AI Technical Summary

Problems solved by technology

This material is mainly graphite in the shape of point balls, and has good wear resistance, but the disadvantage is that the carbide structure is still distributed in a network shape, which can resist thermal cracks, especially for high rolling force and high temperature rolling medium and thick plates It still shows insufficient heat crack resistance on the rolling mill, so there is still room for improvement

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