Modificator for high-chromium alloy grinding balls and preparation method thereof

Abstract

The invention discloses a modificator for high-chromium alloy grinding balls and a preparation method thereof, and relates to the technical field of wear-resistant material modificators. The chemicalcomponents of the modificator for high-chromium alloy grinding balls comprise, by weight percentage, 7-12% of Nb, 5-10% of Ti, 7-13% of Al, 3-8% of Sc, 5-10% of Ce, 15-20% of Si, 2-6% of B and the balance Fe. The preparation method includes the steps that pure aluminum is heated to be molten; then ferro-columbium alloy, ferro-titanium alloy, ferro-boron alloy, aluminum scandium alloy, ferro-ceriumalloy, pure silicon and pure iron are added, and heated to be molten; after all the components are molten, the melt is cast into a metal mold and cooled; and cast ingots are taken out, and the modificator is obtained. The modificator is used for modification of high-chromium alloy grinding balls, molten steel can be purified, grains and structures can be effectively refined, the form and distribution form of carbide are improved, the carbide is dispersed evenly, a substrate is reinforced, good toughness is achieved after heat treatment, abrasion resistance is good, and the service life is prolonged. Besides, on the basis of not affecting the performance of grinding balls, the contents of precious metal elements such as Mo, Ni and Cr are reduced, and the production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of wear-resistant material modification agents, in particular to a modification agent for high-chromium alloy grinding balls and a preparation method thereof. Background technique [0002] Grinding ball is a kind of crushing medium used in ball mills, used to crush materials in the mill, and is a consumable. The service life of the grinding ball directly affects the labor productivity, so the requirement for the grinding ball is not only to have sufficient strength and hardness, but also to have good impact toughness. High-chromium alloy grinding balls are widely used in various fields because of their good wear resistance, but their impact toughness is poor, they are prone to brittle cracks, their service life is short, and their comprehensive mechanical properties need to be further improved. Using a modifier to modify molten steel is the most effective way to greatly improve the overall performance of al...

AI Technical Summary

Problems solved by technology

At present, there are relatively few studies on modifiers, and the refinement effect of existing modifiers for high chromium alloy grinding balls is not ideal.