A light-weight ball mill wear-resistant liner and its preparation method

Abstract

The invention discloses a lightweight ball mill abrasion resisting liner plate and a preparing method thereof. The lightweight ball mill abrasion resisting liner plate is prepared through electric arcfurnace smelting, LF furnace refining, VD furnace vacuum refining, die casting pouring and heat treatment. The lightweight ball mill abrasion resisting liner plate comprises following chemical components including, by mass percent, 1.50 wt%-1.80 wt% of C, 0.15 wt%-0.40 wt% of Si, 28.6 wt%-30.6 wt% of Mn, 10.0 wt%-12.6 wt% of Al, smaller than or equal to 0.010 wt% of S, smaller than or equal to 0.015 wt% of P, and the balance Fe and inevitable impurities, wherein (C+Mn):Al=2.5-3.0. An alkaline furnace lining electric arc furnace is adopted for smelting, component uniformity and stability are ensured through LF refining and VD vacuum refining, and the content of gas in steel is low; a metal die is adopted in die casting, a water jacket is imbedded in the back face of a metal model, a casting is arranged in a half model, top casting type pouring is conducted, smooth proceeding of liner plate casting is ensured, and rapid solidification of the casting is achieved; after high-temperature casting demoulding, water toughening treatment is immediately conducted, re-heating is omitted, and energy is saved; and the production period is short, the labor productivity is improved, and the production cost is reduced. The prepared abrasion resisting liner plate is small in weight, high in strength and good in tenacity.

Description

technical field [0001] The invention belongs to the technical field of metallurgical materials, and in particular relates to a lightweight ball mill wear-resistant liner and a preparation method thereof. Background technique [0002] High manganese steel is a wear-resistant material with a long history. As early as 1882, the British Robert Hadfield had developed high manganese steel. Due to the tendency to form a large range of stacking faults, twins and planes during plastic deformation The dislocation structure makes it have high strength and impact toughness, so high manganese steel is used as a wear-resistant material. The structure of high manganese steel is austenite. Under the conditions of strong impact or high pressure, the surface of high manganese steel workpiece undergoes plastic deformation, austenite undergoes work hardening, and the external driving force promotes the transformation of austenite to martensite. The hardness can be increased from HB170-225 to H...

AI Technical Summary

Problems solved by technology

The wear-resistant pipe fittings of large ball mills and cement pump trucks are composed of hundreds of wear-resistant liners. Due to their heavy weight, they will consume a lot of energy during operation.

Images