Industrial production method of chromium-free white cast iron with high wear resistance

Abstract

The invention discloses an industrial production method of a chromium-free white cast iron with high wear resistance. The method comprises the following steps: the content of each component in the cast iron are (mass percent %): 2.8 to 3.1 of C, 0.8 to 1.4 of Si, 0.5 to 0.8 of Mn, 0.9 to 1.1 of Cu, 0.6 to 0.8 of Mo, 0.3 to 0.5 of V, 0.18 to 0.22 of B and the balance of Fe; the amounts of a modifier added in every 100 unit mass of the cast iron are: 0.6 to 1.0 of Re, 0.1 to 0.3 of Al, 0.1 to 0.3 of Nb and 0.1 of N; the raw materials for cast iron are added into a medium frequency induction furnace for melting, (bauxite is employed for producing crucible), the chromium-free cast iron is prepared, the modifier is added at the bottom of a ladle according to a proportion when the cast iron is casted; the obtained chromium-free cast iron is performed by a heat treatment, the chromium-free white cast iron with high wear resistance can be obtained; according to the method, the chromium element which is the cheapest can be removed, the performance of the obtained cast iron material of the invention can be reached to a performance of a high chromium cast iron through a heat treatment. A common stainless steel welding rod is employed for repair welding, so that the material cost is greatly reduced, and chromium-free white cast iron with high wear resistance is convenient for industrialized production.

Description

technical field [0001] The invention relates to a production method of metal materials, in particular to an industrial production method of chromium-free high wear-resistant white cast iron. Background technique [0002] Since its application in the 1960s, high-chromium cast iron has been recognized as an excellent anti-wear material in the world, and has been widely used in mining, electric power, construction and road construction industries. High chromium cast iron contains a large amount of chromium and other alloying elements, and is a wear-resistant material with high manufacturing cost. However, due to its good wear resistance, high hardness, high toughness, high abrasive wear resistance and corrosion wear resistance, etc. Under some harsh specific working conditions, it is necessary to use this high-chromium cast iron material containing about 18-25% (mass percentage) of chromium, which not only increases the cost but also wastes resources. Someone has invented mol...

AI Technical Summary

Problems solved by technology

Under some harsh specific working conditions, it is necessary to use this high-chromium cast iron material containing about 18-25% (mass percentage) of chromium, which not only increases the cost but also wastes resources.

In the existing patents, someone has invented molybdenum-nickel high-chromium wear-resistant cast iron, but its chromium content is still very high (mass percentage 15-18%)