Wide and thin specification NM450 wear-resistant steel plate and fabrication method

A manufacturing method and thin gauge technology, applied in the field of metallurgy, can solve the problems of difficulty in meeting large-scale, lightweight and long-life, not wide width, not thin thickness, etc., and achieve good development value and market prospects, good unevenness. , the effect of high wear resistance

Inactive Publication Date: 2019-01-11
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there have been many patent reports on low-alloy wear-resistant steel, but the thickness of its production is not thin, and at the same time, it can produce thin specifications but the width is not wide, whic

Method used

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  • Wide and thin specification NM450 wear-resistant steel plate and fabrication method

Examples

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Example Embodiment

[0021] Example 1

[0022] In this embodiment, a wide and thin wear-resistant steel plate with a thickness of 6mm, a width of 2600-3100mm and a Brinell hardness of 450HB is used as an example. The chemical composition and mass percentage are as follows: C: 0.19%, Si: 0.33%, Mn: 1.10%, P : 0.011%, S: 0.0020%, Cr: 0.34%, Ti: 0.015%, B: 0.0016%, the rest is Fe and unavoidable impurities.

[0023] The manufacturing method includes hot metal desulfurization pretreatment-converter smelting-LF + RH refining-continuous casting-billet heating-dephosphorization-rolling-air cooling-flaw detection-shot blasting-quenching-tempering-powerful straightening-cutting-sampling-spraying Print identification-inspection-warehousing.

[0024] The molten steel smelted according to the above ratio is subjected to continuous casting after vacuum degassing treatment. The thickness of the continuous casting billet is 150mm. The billet is heated to a furnace temperature of 1220°C, held for 180 minutes, and then ...

Example Embodiment

[0025] Example 2

[0026] In this embodiment, a wide and thin wear-resistant steel plate with a thickness of 6mm, a width of 2600-3100mm and a Brinell hardness of 450HB is taken as an example. The chemical composition and mass percentage are as follows: C: 0.20%, Si: 0.34%, Mn: 1.08%, P : 0.010%, S: 0.0015%, Cr: 0.35%, Ti: 0.018%, B: 0.0015%, the rest is Fe and unavoidable impurities.

[0027] The manufacturing method includes hot metal desulfurization pretreatment-converter smelting-LF + RH refining-continuous casting-billet heating-dephosphorization-rolling-air cooling-flaw detection-shot blasting-quenching-tempering-powerful straightening-cutting-sampling-spraying Print identification-inspection-warehousing.

[0028] The molten steel smelted according to the above ratio is subjected to continuous casting after vacuum degassing. The thickness of the continuous casting billet is 150mm. The billet is heated to a furnace temperature of 1230°C, kept for 200 minutes, and then rolled ou...

Example Embodiment

[0029] Example 3

[0030] In this embodiment, a wide and thin wear-resistant steel plate with a thickness of 6mm, a width of 2600-3100mm and a Brinell hardness of 450HB is taken as an example. The chemical composition and mass percentage are as follows: C: 0.19%, Si: 0.34%, Mn: 1.09%, P : 0.010%, S: 0.0020%, Cr: 0.33%, Ti: 0.017%, B: 0.0017%, the rest is Fe and unavoidable impurities.

[0031] The manufacturing method includes hot metal desulfurization pretreatment-converter smelting-LF + RH refining-continuous casting-billet heating-dephosphorization-rolling-air cooling-flaw detection-shot blasting-quenching-tempering-powerful straightening-cutting-sampling-spraying Print identification-inspection-warehousing.

[0032] The molten steel smelted according to the above proportion is subjected to continuous casting after vacuum degassing treatment. The thickness of the continuous casting billet is 150mm. The billet is heated to a furnace temperature of 1220°C, held for 190 minutes, and...

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Abstract

The invention discloses a wide and thin specification NM450 wear-resistant steel plate and relates to the technical field of metallurgy. The wide and thin specification NM450 wear-resistant steel plate comprises the following chemical ingredients of, in percentage by mass, 0.18-0.22% of C, 0.20-0.60% of Si, 0.8-1.2% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.30-0.50% of Cr, 0.008-0.030% of Ti, 0.0008-0.0025% of B and the balance Fe and unavoidable impurities. According to the wide and thin specification NM450 wear-resistant steel plate and a fabrication method, the designed wear-resistant steel reaches the 450 HB grade in brinell hardness and has a chemical ingredient system of good toughness and high strength, a related rolling and heat treating processis simple, the controllable range of heat treating parameters is wide, the comprehensive performance of products is good, and the wide and thin specification NM450 wear-resistant steel plate and thefabrication method have good development value and market prospects.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a wide and thin NM450 wear-resistant steel plate and a manufacturing method. Background technique [0002] Compared with traditional wear-resistant cast steel, low-alloy wear-resistant steel plate has low alloy content, high low-temperature impact toughness, good comprehensive properties such as bending and forming, flexible and convenient production, and low production cost. It is widely used in work Harsh conditions require high strength and hardness, good wear resistance engineering, mining, construction, agriculture, cement, port, electric power and metallurgy and other machinery and equipment manufacturing, such as bulldozers, loaders, excavators, dump trucks, ball mills and various A variety of mining machinery, grab buckets, stackers and reclaimers, feeding bending structures, etc. Such parts generally work under extremely harsh conditions of dry and wet environments, ...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D8/02C22C38/02C22C38/04C22C38/28C22C38/32
Inventor 姜在伟闫强军姜辉侯中华杨柳
Owner NANJING IRON & STEEL CO LTD
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