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Atmospheric corrosion resistant martensitic wear-resistant steel plate and manufacturing method thereof

A technology for atmospheric corrosion-resistant and wear-resistant steel plates, applied in the field of iron and steel smelting, can solve the problems that the hardness, plasticity, toughness, wear resistance and corrosion resistance of steel plates cannot be taken into account at the same time, and achieve the effect of good low-temperature impact toughness

Active Publication Date: 2020-08-18
湖南华菱涟源钢铁有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a martensitic wear-resistant steel plate resistant to atmospheric corrosion and its manufacturing method, to solve the problem that the hardness, plasticity, toughness, wear resistance and corrosion resistance of the steel plate cannot be simultaneously considered in the prior art The problem

Method used

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  • Atmospheric corrosion resistant martensitic wear-resistant steel plate and manufacturing method thereof
  • Atmospheric corrosion resistant martensitic wear-resistant steel plate and manufacturing method thereof
  • Atmospheric corrosion resistant martensitic wear-resistant steel plate and manufacturing method thereof

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preparation example Construction

[0072] The preparation method of the steel plate described in embodiment 1~2 and comparative example comprises the following steps:

[0073] The molten steel is smelted in a 210-ton converter after desulfurization by KR, desulfurized by the KR method, smelted by the converter, refined by the RH method, and continuously cast into slabs, which are reheated, rough rolled, finish rolled, laminar cooled, and coiled into coils , the steel coils are successively treated by Kaiping, quenching and tempering to become a martensitic wear-resistant steel plate resistant to atmospheric corrosion, which can be spray-printed, packaged and put into storage.

[0074] Table 2

[0075]

Embodiment 1

[0076] The thickness of the atmospheric corrosion-resistant martensitic wear-resistant steel plate described in Example 1 is 8mm, and its metallographic structure is as follows figure 1 as shown, figure 1 The metallographic structure of medium steel plate includes tempered martensite structure plus a small amount of carbide, and the steel plate has high wear resistance.

Embodiment 2

[0077] The thickness of the atmospheric corrosion-resistant martensitic wear-resistant steel plate described in embodiment 2 is 8mm, and its metallographic structure is as follows figure 2 as shown, figure 2 The metallographic structure of medium steel plate includes tempered martensite structure plus a small amount of carbide, and the steel plate has high wear resistance.

[0078] The specific mechanical properties of each embodiment and comparative examples are shown in Table 3.

[0079] table 3

[0080]

[0081] The yield strength of the atmospheric corrosion-resistant martensitic wear-resistant steel plates described in Examples 1-2 are all greater than 1100 MPa, and the tensile strength is greater than 1400 MPa. The elongation after breaking is greater than 10%, and the impact energy at -40°C is greater than 27J.

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Abstract

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to an atmospheric corrosion resistant martensitic wear-resistant steel plate. The atmospheric corrosion resistant martensitic wear-resistant steel plate comprises the following components including, by mass, larger than or equal to 0.14wt% and smaller than or equal to 0.22wt% of C, larger than or equal to0.30wt% and smaller than or equal to 0.60wt% of Si, larger than or equal to 0.30wt% and smaller than or equal to 1.00wt% of Mn, larger than or equal to 0.010wt% and smaller than or equal to 0.020wt% of Ti, larger than or equal to 0.02wt% and smaller than or equal to 0.04wt% of Nb, larger than or equal to 0.50 wt% and smaller than or equal to 1.0wt% of Ni, larger than or equal to 0.20 wt% and smaller than or equal to 0.50wt% of Cu, larger than or equal to 3.4 wt% and smaller than or equal to 4.0wt% of Cr, larger than or equal to 0.0010 wt% and smaller than or equal to 0.0020wt% of B, larger than 0 and smaller than or equal to 0.003wt% of S, larger than 0 and smaller than or equal to 0.012wt% of P and the balance iron and other inevitable impurities, wherein the atmospheric corrosion resistant martensitic wear-resistant steel plate can solve the problems of hardness, plasticity, toughness, wear resistance and corrosion resistance of the steel plate.

Description

technical field [0001] The application belongs to the technical field of iron and steel smelting, and in particular relates to a martensitic wear-resistant steel plate resistant to atmospheric corrosion and a manufacturing method thereof. Background technique [0002] As a commonly used steel for engineering machinery, wear-resistant steel plates are widely used in equipment in fields such as mines, coal mines, and metallurgy. Due to the harsh working environment in fields such as mines, coal mines, and metallurgy, the corrosion resistance and High wear resistance. [0003] However, in order to increase the wear resistance of the steel plate, the traditional wear-resistant steel plate usually increases the carbon content or Ti content. Although the above-mentioned method increases the wear resistance of the steel plate, it cannot guarantee the corrosion resistance of the steel plate, and the above-mentioned method will increase the wear resistance of the steel plate. Hardne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/48C22C38/50C22C38/54C21D8/02C21D1/18
CPCC21D1/18C21D8/0226C21D2211/008C22C38/002C22C38/02C22C38/04C22C38/42C22C38/48C22C38/50C22C38/54
Inventor 梁亮李光辉严立新邓想涛王昭东刘宁董常福郑庆刘旭辉汪宏兵温长飞肖爱达徐德强谢世正
Owner 湖南华菱涟源钢铁有限公司
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