Multielement alloying high-strength high-abrasion-resistance steel and manufacturing method of hot-rolled plate
A technology of multi-component alloy and manufacturing method, which is applied in the field of multi-alloy alloyed high-strength and high-wear-resistant steel and hot-rolled sheet manufacturing, can solve the problems of poor wear resistance and fatigue wear performance of wear-resistant steel, and achieve increased wear resistance. , the effect of grain refinement
Active Publication Date: 2016-03-02
TIANJIN WILL LONG SCI &TECH CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem of poor wear resistance and fatigue wear performance of wear-resistant steel in the above-mentioned mechanical equipment under medium and low impact loads
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[0024] The composition design idea of the multi-alloyed high-strength and high-wear-resistant steel of the present invention is to reasonably adjust the content of carbon and manganese elements, expand the austenite phase region, obtain an unstable single austenite structure at normal temperature, and add a trace amount of Cr at the same time. , Mo, Nb, V and Ti can effectively inhibit the growth of austenite grains and refine the structure and grains. At the same time, these microalloying elements and carbon form alloy carbides, which are dispersed and distributed on the solid solution matrix. It can play an obvious second strengthening effect, which improves the strength, hardness and wear resistance of the steel pipe. During use, when the steel plate is subjected to impact force, the surface is strengthened by martensitic transformation, which increases the surface hardness and further enhances the wear resistance.
[0025] The reasons for selecting the above-mentioned ch...
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Abstract
The invention provides multielement alloying high-strength high-abrasion-resistance steel and a manufacturing method of a hot-rolled plate. The high-abrasion-resistance steel includes the chemical components including, by weight percent, 1.0% to 1.2% of C, 0.6% to 1.0% of Si, 8.0% to 10.0% of Mn, smaller than 0.02% of P, smaller than 0.02% of S, 1.5% to 2.5% of Cr, 0.2% to 0.5% of Mo, 0.6% to 1.0% of V, 0.02% to 0.06% of Nb, 0.01% to 0.1% of Ti, 0.03% to 0.08% of Al and the balance Fe and inevitable impurities. The manufacturing process of the high-abrasion-resistance steel hot-rolled plate includes steel making, continuous casting, heating, hot rolling and thermal treatment. The hot-rolled medium-manganese abrasion-resistance steel hot-rolled plate produced according to the component ratio and the process parameters is high in strength and good in ductility and toughness, the tensile strength is over 900 MPa, the normal-temperature impact absorbing energy is over 100 J, the thermal treatment process obtained after hot rolling is simple, and the industrial production efficiency is high.
Description
technical field [0001] The invention belongs to the technical field of high-strength and high-wear-resistance hot-rolled steel, and in particular relates to a manufacturing method of a multi-element alloyed high-strength and high-wear-resistance steel and a hot-rolled sheet. Background technique [0002] At present, the most widely used wear-resistant steel in the field of coal mining is medium and low alloy wear-resistant steel. The representative steel grades include Sweden's HARDOX series (hereinafter referred to as HD series); Japan's JFE's EH series; WISCO's NM series and Baosteel's B-HARD series. Medium and low alloy wear-resistant steel is a kind of low-carbon alloy structural steel whose microstructure is martensite or martensite-bainite structure after quenching and tempering. The wear resistance of this type of wear-resistant steel, especially the wear-resistant performance of the thick plate, is obviously attenuated from the surface layer to the core, which is th...
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IPC IPC(8): C22C38/04C22C38/18C22C38/12C22C38/14C22C38/02C21D8/02
CPCC21D8/0226C22C38/02C22C38/04C22C38/12C22C38/14C22C38/18C21D2211/001C22C38/38C21D6/002C21D6/005C22C38/22C22C38/24C22C38/26C22C38/28C21D2211/004C21D8/0263C21D9/46C22C38/06C21D8/0205
Inventor 王军祥岳宏霖
Owner TIANJIN WILL LONG SCI &TECH CO LTD