Abrasion-resistant steel plate with residual stress of 50-100 MPa and preparation method thereof

Abstract

The invention discloses an abrasion-resistant steel plate with residual stress of 50-100 MPa and a preparation method thereof. the abrasion-resistant steel plate comprises the chemical components of,by weight, 0.10%-0.21% of C, 0.20%-0.60% of Si, 1.0%-1.40% of Mn, 0.15%-0.50% of Cr, 0.015%-0.040% of Ti, 0-0.015% of P, 0-0.003% of S, 0.0010%-0.0025% of B, 0.015%-0.045% of Al, 0-0.00015% of H, 0-0.0035% of N, and the balance Fe and unavoidable inclusions, and the Cr element meets the requirement of 0.491C+0.31Mn+0.101B>=Cr>=0.213C+0.109Mn+0.0032B. The 8-40 mm martensitic structure form tempering-free abrasion-resistant steel plate is obtained, the residual stress of the steel plate is within 100 MPa, and the preparation method is simple, convenient and practical.

Description

technical field [0001] The invention belongs to the technical field of steel plate preparation. Specifically, the invention relates to a wear-resistant steel plate with a residual stress of 50-100 MPa and a preparation method thereof. Background technique [0002] Wear-resistant steel is a wear-resistant material widely used in various wear conditions. With the advancement of production technology, new types of wear-resistant steel emerge in endlessly. The smelting, casting, heat treatment and machining processes are continuously improved. Wear-resistant steel Its comprehensive mechanical properties, wear resistance and service life are gradually improving, and its application fields are expanding day by day. Commonly made engineering machinery, mining machinery, coal mining machinery, crusher and other mechanical parts are widely used in various departments such as metallurgy, mining, building materials, electric power, railways and military, such as bulldozers, loaders, ex...

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Problems solved by technology

[0005] Prior to the present invention, Chinese Patent Publication No. CN 101451220 A, namely "a high-strength wear-resistant steel plate" applied by Wuyang Iron and Steel Co., Ltd., added 0.01 to 0.06% of Nb in the steel, which caused the cost of the steel Higher, and tempering treatment is required after quenching, the production process is complicated and the process is long

[0006] China Patent Publication No. CN 101649474 A "A Low-alloy Weldable Wear-resistant Steel, Steel Plate and Its Manufacturing Method" applied by Baoshan Iron and Steel Co., Ltd., Chinese Patent Publication No. CN 101638755 A "High Toughness, Ultra-High Strength and Durability" applied by Northeastern University Grinding plate and its production method", Chinese Patent Publication No. CN 101698900 A "A Production Process for Low Alloy Ultra-high Hardness Wear-resistant Steel Plate" applied by Beijing University of Science and Technology, Chinese Patent Publication No. CN 102021492 A "Anshan Iron and Steel Co., Ltd. application A low-carbon and low-alloy wear-resistant steel and its production method", the wear-resistant steel involved needs to be tempered after quenching, the production process is complicated, the process is long, and the cost is high

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