High-strength high-hardness steel plate and flexibility production method

Abstract

The invention relates to a high-strength high-hardness steel plate which comprises, by weight, 0.10%-0.35% of C, 0.25%-0.65% of Si, 1.00%-1.60% of Mn, not larger than 0.020% of P, not larger than 0.010% of S, 0.020%-0.070% of Als, 0.10%-0.70% of Cr, 0.008%-0.035% of Ti, 0.010%-0.080% of Nb and 0.0010%-0.0060% of B. A production method includes the steps that smelting and pouring are carried out according to chemical constituents to form a blank, and then hot rolling is carried out; quenching treatment is carried out; tempering heat treatment is carried out; and natural cooling is carried out until the room temperature is obtained, and standby application is carried out. According to the production method, steel containing same constituents is subject to same quenching heat treatment, and then is subject to tempering heat treatment at different temperatures, and therefore the steel plates with different strength and hardness grades are obtained, and the requirements of users are accordingly met; and in addition, the process is simplified, and the production stability is good.

Description

technical field [0001] The invention relates to a high-strength and high-hardness steel plate and a production method thereof, in particular to a high-strength and high-hardness steel plate and a flexible production method. Background technique [0002] Wear is one of the main forms of material failure. According to statistics, in industrially developed countries, the economic loss caused by the wear and tear of mechanical equipment and parts accounts for about 4% of the total output value of the national economy. my country consumes more than one million tons of steel due to wear and tear every year. Therefore, the development and application of high-strength and high-hardness steel plays an important role in promoting the sound and rapid development of the national economy. [0003] Before the present invention, although there were a large number of documents and patent reports at home and abroad about high-strength and high-hardness steel plates and their manufacturing ...

AI Technical Summary

Problems solved by technology

[0006] The Chinese patent publication number is CN103205627A, which discloses a low-alloy high-performance wear-resistant steel plate. In addition to limiting the chemical composition, each element must also satisfy the limiting formula: 0.20%≤Cr / 5+Mn / 6+50B≤0.55%, 0.02%≤Mo / 3+Ni / 5+2Nb≤0.45%, 0.01%≤Al+Ti≤0.13%, which will inevitably increase the difficulty of controlling the smelting process