Non-tempered high-strength wear-resisting steel and production method thereof

Abstract

The invention discloses non-tempered high-strength wear-resisting steel and a production method thereof. The non-tempered high-strength wear-resisting steel comprises the chemical components in weight percent: 0.18-0.23 percent of carbon (C), 0.51-0.65 percent of silicon (Si), 1.26-1.75 percent of manganese (Mn), not greater than 0.020 percent of phosphorus (P), not greater than 0.010 percent of sulfur (S), 0.26-0.55 percent of nickel (Ni), 0.80-1.10 percent of chromium (Cr), 0.40-0.55 percent of molybdenum (Mo), 0.03-0.05 percent of niobium (Nb), 0.04-0.06 percent of vanadium (V), 0.02-0.04 percent of titanium (Ti), 0.001-0.003 percent of boron (B), 0.005-0.04 percent of aluminum sulfide (Als) and the balance of ferrum and inevitable impurities. The fluctuation range of the yield strength of the non-tempered high-strength wear-resisting steel is 1180-1280MPa, the fluctuation range of the tensile strength is 1420-1530MPa, and the Brinell hardness is 430-450.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a non-quenched and tempered high-strength wear-resistant steel and a production method thereof. Background technique [0002] Today, with the rapid development of science and technology and modern industry, the operating speed of mechanical equipment is getting higher and higher. Many workpieces and equipment fail rapidly due to wear, resulting in a considerable waste of materials and economic losses. The development of wear-resistant materials has become an influence on modern important factor in production efficiency. Wear-resistant steel is widely used in various departments such as metallurgy, mining, building materials, electric power, railway and military, such as excavator bucket teeth, ball mill liners, crusher jaw plates, crushing walls, rolling mortar walls, tractor track shoes, fans Grinding impact plates and railway switches and much more. [000...

AI Technical Summary

Problems solved by technology

However, the steel contains high alloy content of Cr4-6%, Ni4-6%, which will increase the cost of steelmaking; and the steel contains 0.07% P, which will lead to a decrease in the toughness of the steel, which is not conducive to processing and welding

[0008] From the above comparative patents, it can be seen that the wear-resistant steel currently available for mechanical equipment and other components has the following disadvantages: 1. Heat treatment is required, the production process is complicated, the process consumes a lot of energy, the cost is high, and the production pace is low; 2. It contains high Alloy elements such as Cr and Ni have high production costs; 3. High carbon content reduces the toughness of steel and is not conducive to welding

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