Martensite wear resistant steel and manufacturing method thereof

Abstract

The invention relates to martensite wear resistant steel and a manufacturing method thereof. The martensite wear resistant steel comprises the following chemical components in percentage by mass: 0.30-0.35 % of C (Carbon), 0.6-1.2 % of Si (Silicon), 1.0-1.5 % of Mn (Manganese), 2.5-3.5 % of Cr (Chromium), 0.003-0.007 % of B (Boron), 0.03-0.06 % of Ti (Titanium), 0.1-0.15 % of Re (Rhenium), 0.01-0.03 % of Al (aluminum), not more than 0.035 % of S (Sulfur), not more than 0.035 % of P (Phosphorus) and the balance of Fe (Ferrum); and through a smelting process and a heat treatment process, the martensite wear resistant steel is obtained. In the manufacturing method of the martensite wear resistant steel, provided by the invention, precious alloy elements like Mo (Molybdenum), Ni (Nickel) and the like are not used; by using the martensite wear resistant steel prepared by the manufacturing method in the invention, the mechanical property can satisfy the national standard; moreover, compared with a high manganese steel, the martensite wear resistant steel has the advantage of obviously improving the corrosion resistance and increasing the operation time or the wear resistance by 1-3 times.

Description

technical field [0001] The invention belongs to the field of cast steel, and relates to wear-resistant castings, in particular to a martensitic wear-resistant steel and a manufacturing method thereof. Background technique [0002] The current wear-resistant cast steel mainly includes high manganese steel and low alloy steel. High manganese steel is a kind of austenitic steel with low initial hardness. Only under the action of large impact load or joint stress can it exert the surface work hardening phenomenon and play a role in wear resistance. However, in actual working conditions, More than 90% of the processes cannot effectively harden the high manganese steel, making the actual wear resistance of the high manganese steel unsatisfactory. [0003] At present, foreign medium and low carbon alloy martensitic wear-resistant steels are mostly Cr, Mo and Ni alloy steels. The heat treatment process adopts the process of quenching and low temperature tempering to obtain alloy pr...

AI Technical Summary

Problems solved by technology

High manganese steel is a kind of austenitic steel with low initial hardness. Only under the action of large impact load or joint stress can it exert the surface work hardening phenomenon and play a role in wear resistance. However, in actual working conditions, More than 90% of the processes cannot harden high manganese steel effectively, making the actual wear resistance of high manganese steel unsatisfactory

Images