Chrome manganese tungsten and molybdenum high alloy wear-resistant cast iron ball and preparation method thereof

Abstract

The invention discloses a chrome manganese tungsten and molybdenum high alloy wear-resistant cast iron ball and a preparation method thereof. The preparation method comprises the following steps: preparing materials of carbon steel, chrome iron, manganese iron, tungsten iron, molybdenum iron and vanadium iron, adding a small amount of rare earth as an auxiliary material, melting into a whole at a high temperature of 1700 DEG C in a medium frequency furnace for 15 min, moulding by casting and grinding and polishing, and then quenching at a high temperature of 980 DEG C for 20 h and annealing at a low temperature of 300 DEG C, so as to obtain the chrome manganese tungsten and molybdenum high alloy wear-resistant cast iron ball containing the components by weight percent: 18-24 percent of chrome, 1.0-1.2 percent of manganese, 0.2-0.3 percent of tungsten, 0.1-0.3 percent of molybdenum, 0.1-0.15 percent of vanadium and the balance of iron and impurities. The chrome manganese tungsten and molybdenum high alloy wear-resistant cast iron ball has the strict requirement for matching precision of various elements, so as to lower the out-of-roundness rate and the breakage rate in the operation; and the preparation method is simple in process, effectively reduces the electric energy loss, and achieves the energy conservation and consumption reducing effects.

Description

technical field [0001] The invention relates to a wear-resistant cast iron material, in particular to a chromium-manganese-tungsten-molybdenum high-alloy wear-resistant cast iron ball and a preparation method thereof. Background technique [0002] Due to the high content of alloying elements, high chromium cast iron material has intermittent network distribution of eutectic carbides, high hardness and impact toughness, especially when preparing wear-resistant liners for cement industry ball mills, it shows excellent wear resistance and toughness , and the production cost is low, and it has been rapidly popularized and applied in industries such as metallurgy, mining, building materials, and thermal power generation. However, due to the lack of hardenability and toughness of single chromium alloyed cast iron, the core of the casting has poor wear resistance or early fracture. Contents of the invention [0003] Aiming at the problems in the prior art, the present invention ...

AI Technical Summary

Problems solved by technology

However, due to insufficient hardenability and toughness of single chromium alloyed cast iron, the core of the casting has poor wear resistance or early fracture