High-temperature resistant and wear-resistant alloy steel lining plate material and preparation method thereof

Abstract

The invention discloses a high-temperature resistant and wear-resistant alloy steel lining plate material which comprises the following chemical elements in percentage by mass: 0.2-0.4% of carbon, 0.2-0.4% of silicon, 3.5-3.7% of manganese, 0.7-0.9% of chromium, 0.8-1.1% of molybdenum, 1.2-1.4% of vanadium, 0.1-0.15% of lanthanum, 0.04-0.07% of Nb, less than or equal to 0.04% of S, less than or equal to 0.04% of P and the balance of iron. In the lining plate provided by the invention, the alloy steel obtained by adding the elements such as lanthanum, molybdenum and niobium into low-carbon steel has the advantages of high hardness, high strength, good wear resistance, high-temperature resistance, good toughness, good plasticity, corrosion resistance and high cost performance. In the lining plate material disclosed by the invention, the waste iron is partially used as the raw material, secondary refining is performed, the thermal treatment temperature after casting is reasonably controlled, the raw material is fed in batches, and the comprehensive mechanical properties are improved. A refining agent is applied to the casting production; and in a casting, the porosity is reduced by 1-2 degrees, and the oxide inclusion is at about level 2.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a high-temperature-resistant and wear-resistant alloy steel lining material and a preparation method thereof. Background technique [0002] After more than 30 years of development, the liner material has experienced the development of high manganese steel, ordinary white cast steel, nickel hard cast iron, high chromium white iron, modified high manganese steel and medium and low alloy steel with various quenching and tempering processes stage. At present, in domestic practical applications, high manganese steel is still dominant. Among several mainstream materials, high manganese steel has good toughness, but its wear resistance and corrosion resistance are not ideal; high chromium cast iron has good wear resistance, but its toughness is low. Poor; the brittleness and corrosion resistance of medium and low alloy steels are not up to standard. It is necessary to research and devel...

AI Technical Summary

Problems solved by technology

At present, in domestic practical applications, high manganese steel is still dominant. Among several mainstream materials, high manganese steel has good toughness, but its wear resistance and corrosion resistance are not ideal; high chromium cast iron has good wear resistance, but its toughness is low. Poor; the brittleness and corrosion resistance of medium and low alloy steels are not up to standard