High-flexibility wear-resistant steel plate and manufacturing method thereof

Abstract

The invention provides a high-flexibility wear-resistant steel plate, which is characterized by comprising the following chemical components by weight percent: 0.04 to 0.11 percent of C, 0.10 to 0.50 percent of Si, 0.50 to 1.50 percent of Mn, less than 0.015 percent of P, less than 0.010 percent of S, 0 to 0.60 percent of Cr, 0 to 0.50 percent of Mo, 0 to 0.80 percent of Ni, 0 to 0.050 perent of Nb, 0.005 to 0.0040 percent of B, 0.010 to 0.060 percent of Al and 0.005 to 0.060 percent of Ti, and the surplus is Fe and inevitable foreign matters; and the content of Si, Mn and Cr satisfies that: Si+Mn+Cr is less than or equal to 2.4 percent and more than or equal to 1.30 percent; and the content of Mo, Ni and Nb satisfies that: Mo+Ni+Nb is less than or equal to 1.10 percent more than or equal to 0.10 percent. The hardness of the high-flexibility wear-resistant steel plate is more than 350 HB, the longitudinal impact power is more than 100J at the temperature of minus 40 DEG C, the micro-structure is of bainite or martensite, and the welding performance is excellent. The wear-resistant steel plate has simple and easy production technology and excellent low-temperature flexibility and welding performance.

Description

technical field [0001] The invention relates to wear-resistant steel, in particular to a high-toughness wear-resistant steel plate and a manufacturing method thereof. Background technique [0002] Wear-resistant steel is a kind of wear-resistant material suitable for various wear conditions. It is widely used in various departments such as metallurgy, mining, building materials, electric power, railways and military, such as excavator bucket teeth, ball mill liners, crushers, etc. Jaw plates, tractor track shoes, fan mill impact plates and railway switches, etc. [0003] Since the British Hadfield (R0.A0.Hadfield) obtained the patent of high manganese steel in 1883, high manganese wear-resistant steel has been widely used, but the research has found that: high manganese steel under high stress state ( Such as strong impact or extrusion load) produces work hardening, forming a hard and wear-resistant surface layer, thereby improving wear resistance, but under low and medium ...

AI Technical Summary

Problems solved by technology

[0008] Increasing the content of carbon and alloying elements in steel can obtain better mechanical properties, but it affects its weldability and increases the production cost of steel. Therefore, it is necessary to control the content of carbon and alloying elements to develop low-cost, high-performance and simple-process low-alloy Wear-resistant steel is an inevitable trend in the development of social economy and steel industry

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