Ultrahigh-strength low-alloy wear-resistant steel used for forging and preparation method thereof

Abstract

The invention provides ultrahigh-strength low-alloy wear-resistant steel used for forging. Main chemical components of the material of the low-alloy wear-resistant steel include 0.20 wt.%-0.40 wt.% of C, 1.00 wt.%-1.55 wt.% of Si, 0.70 wt.%-1.00 wt.% of Mn, 1.00 wt.%-1.40 wt.% of Cr, 0.05 wt.%-0.20 wt.% of Mo, 0.05 wt.%-0.10 wt.% of Ni, 0.05 wt.%-0.20 wt.% of Cu, not larger than 0.035 wt.% of S, not larger than 0.035 wt.% of P and the balance Fe. The ultrahigh-strength low-alloy wear-resistant steel has the beneficial effects that by means of the ultrahigh-strength low-alloy wear-resistant steel, hardenability and wear resistance of the wear-resistant steel can be greatly improved; and the ultrahigh-strength low-alloy wear-resistant steel used for forging has ultrahigh strength, good tenacity, high hardness and good wear resistance at the same time, and the service life of the ultrahigh-strength low-alloy wear-resistant steel can be prolonged by three or more times compared with the service life of ordinary low-alloy wear-resistant steel. The invention further provides a preparation method of the ultrahigh-strength low-alloy wear-resistant steel used for forging, and it is ensured that the process is not complex and is easy to control and the production cost is low.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to an ultra-high-strength low-alloy wear-resistant steel for forging suitable for bucket teeth and a preparation method thereof. Background technique [0002] Bucket teeth are the most severely worn parts in excavators and loaders in the construction machinery industry. They are widely used in mining, metallurgy, water conservancy, electric power, construction, machinery and other industries. They are in direct contact with rocks, minerals, sand, soil, etc. for a long time. The working conditions are harsh. When contacting the material, it bears both the impact force and the bending force. The tip of the bucket tooth is often subjected to strong impact and sliding abrasive wear. The main failure mode of the bucket tooth is wear and fracture. The surface of the bucket tooth Abrasion leads to breakage, resulting in short service life of bucket teeth and frequent replacement. At present...

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Problems solved by technology

[0007] Therefore, the present invention proposes an ultra-high-strength low-alloy wear-resistant steel for forging that can simultaneously meet the requirements of mechanical properties and reduce manufacturing costs, which solves the problems of the existing low-alloy wear-resistant steel

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