Medium-chromium wear-resistant alloy steel, and preparation method thereof

Abstract

The invention discloses a medium-chromium wear-resistant alloy steel, and a preparation method thereof. The preparation method comprises steps of technology target value determination, material preparation, melting, sampling and adjusting, casting moulding, and thermal treatment. The medium-chromium wear-resistant alloy steel comprises, by weight, 0.35 to 0.55% of carbon, 0.6 to 1.5% of silicon, 0.8 to 1.3% of manganese, phosphor <0.04%, sulfur <0.04%, 3.5 to 8% of chromium, 0.1 to 0.5% of nickel, 0.1 to 0.4% of molybdenum, 0.03 to 0.25% of boron, 0.1 to 0.3% of aluminium, 0.1 to 1.2% of cerium, 0.02 to 0.1% of tin, and the balance iron. The relatively toughness and the impact resistance performance are ensured; the wear resistance and the hardness are improved; the technology is easy to control; and the medium-chromium wear-resistant alloy steel is suitable for civil applications and popularization.

Description

technical field [0001] The invention relates to the technical field of alloy steel manufacture, in particular to a medium-chromium wear-resistant alloy steel with high performance hardness, wear resistance and toughness, which is suitable for civil use and popularization, and a preparation method thereof. Background technique [0002] Alloy steel is an iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements to ordinary carbon steel. [0003] According to the different elements added and appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic properties can be obtained. According to the content of alloy elements in steel, it can be divided into low alloy steel, medium alloy steel and high alloy steel. The main alloying elements of alloy steel are silicon, manganese, chromium, nickel, molybdenum...

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Problems solved by technology

The high-strength and high-toughness alloy steel disclosed in this patent document adopts a low-carbon multi-alloy ratio, which has high smelting costs, high difficulty in control, high process requirements, and high cost.

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