Manufacturing method for abrasion-resistant steel casting

Abstract

The invention discloses a manufacturing method for an abrasion-resistant steel casting. The abrasion-resistant steel casting free of molybdenum and nickel and containing a proper amount of chromium comprises the following ingredients: 0.35-0.45 wt% of C, 1.2-2.3 wt% of Cr, 0.003-0.006 wt% of Nb, 0.2-0.5 wt% of Si, 0.5-1.0 wt% of Mn, 0.05-0.15 wt% of Ti, 0.04-0.08 wt% of V, 0.03-0.05 wt% of N, less than 0.04 wt% of S, less than 0.05 wt% of P, and the balance being Fe. The manufacturing method comprises the following steps: 1) according to parts by weight, scrap steel, pig iron, ferrochrome, sponge iron and a smelting additive with an amount of 1-1.5% based on the total mass of the above raw materials are added to an induction furnace for mixing and heating to melt, wherein the smelting additive is prepared from 10-15 parts of sodium oxide, 3.5-4.5 parts of aluminum oxide, 3-5 parts of potassium oxide, 6-8 parts of sodium carbonate, 4-6 parts of silicon dioxide, 11-15 parts of iron oxide, 0.5-2 parts of titanium dioxide, and 5-10 parts of anhydrous borax, and the contents of the chemical ingredients are adjusted according to requirements. The problem in the prior art that abrasion-resistant steel has high production cost because of containing molybdenum and nickel is solved.

Description

technical field [0001] The invention belongs to the technical field of metal wear-resistant materials, in particular to a method for manufacturing wear-resistant steel castings. Background technique [0002] Wear is a common form of material failure in metallurgy, mining, electric power, machinery, petroleum, chemical, building materials, and military industries. The development of new wear-resistant materials to meet the needs of the above-mentioned departments has always been a topic of constant concern to material researchers. Chinese invention patent CN1150979 discloses a high-chromium wear-resistant cast steel, its chemical composition and weight percentage are as follows: C: 1.2-2.5wt%, Mn≤0.6wt%, Si≤0.6wt%, Cr: 11.5-13.5 wt%, Mo: 0.7-1.2wt%, Cu: 0.5-1.0wt%, V: 3.5-4.5wt%, Re: 0.03-0.05wt%, S: ≤0.06wt%, P≤0.06wt%, the rest are Fe, it has high hardness, but also has high strength and toughness, it has a wide range of applications, and its service life is greatly improv...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for manufacturing wear-resistant steel castings, aiming to solve the problem of high production costs caused by the presence of molybdenum and nickel in the wear-resistant steel in the prior art