Heat-resistant wear-resistant steel plate and production method thereof

Abstract

The invention discloses a heat-resistant wear-resistant steel plate and a production method thereof. The heat-resistant wear-resistant steel plate consists of the following components in percentage byweight: 0.33%-0.40% of C, 0.2%-0.4% of Si, 0.80%-1.00% of Mn, 0.5-0.7% of Cr, 0.2-0.4% of Mo, 0.015%-0.03% of Nb, 0.0005-0.0022% of B, 0.10%-0.20% of Ti, 0.015%-0.045% of Als and the balance of Fe and inevitable impurities; and impurity elements in steel are controlled as follows: less than or equal to 0.015% of P, less than or equal to 0.005% of S, less than or equal to 0.0040% of [N] and less than or equal to 0.0020% of [O]. According to the heat-resistant wear-resistant steel plate and the production method thereof provided by the invention, the steel plate has surface hardness greater than HB400 after being tempered at a temperature lower than 500 DEG C; the production method is simple, and does not need special compound equipment; and residual stress is low, cracks are not liable togenerate, components are simple and common, and the cost is low.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a heat-resistant and wear-resistant steel plate and a production method thereof, which can be used in the manufacture of wear-resistant equipment or components whose ambient temperature is not higher than 500°C. Background technique [0002] In recent years, low and medium alloy wear-resistant steels have achieved rapid development due to their simpler production process, better wear resistance and economical characteristics. This type of wear-resistant steel is mainly produced by quenching or quenching plus low-temperature tempering The heat treatment process obtains low-carbon martensite or its low-temperature tempered structure, which ensures that the steel plate has good wear resistance. In terms of composition design, a certain carbon content is generally used to ensure the hardenability of the steel plate. At the same time, an appropriate amount of chromium, molybdenum, and Nic...

AI Technical Summary

Problems solved by technology

[0004] This type of heat-resistant and wear-resistant steel plate has formed multiple patents at home and abroad, such as CN1026901C, CN104611641ACN103205650A, CN101746089A, CN103342020A, EP3015561 A, US2015 / 0184270 A1, etc.; And Ni, W, Mo and other alloys have high content, high cost and cannot be produced by continuous casting; 2. It needs to be produced by specific production methods such as bimetallic casting, vacuum composite or surfacing welding. The process is complicated, special production equipment is required, and the quality is not easy Guarantee; 3. The residual internal stress of the steel plate after quenching is prone to cracks; 4. The hardness decreases after high temperature tempering, and it does not have heat resistance and wear resistance

Images