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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

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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, which is difficult to meet the large-scale, lightweight and long-life manufacturing of equipment manufacturing. demand, especially for low-alloy wear-resistant steel plates with a Brinell hardness of 450HB, there are fewer products

Method used

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

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Embodiment 1

[0022] This embodiment takes the manufacture of a wide and thin wear-resistant steel plate with a thickness of 6mm, a width of 2600-3100mm, and a Brinell hardness of 450HB as an example. Its 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%, and the rest are Fe and unavoidable impurities.

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

[0024] The molten steel smelted according to the above ratio is vacuum degassed and then continuously cast. The thickness of the continuous casting slab is 150mm. The steel slab is heated to a furnace temperature of 1220°C. The final rolling thickness of the steel plate is 6mm and t...

Embodiment 2

[0026] This embodiment takes the manufacture of a wide and thin wear-resistant steel plate with a thickness of 6mm, a width of 2600-3100mm, and a Brinell hardness of 450HB as an example. Its 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%, and the rest are Fe and unavoidable impurities.

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

[0028] The molten steel smelted according to the above ratio is vacuum degassed and then continuously cast. The thickness of the continuous casting slab is 150mm. The steel slab is heated to a furnace temperature of 1230°C. The final rolling thickness of the steel plate is 6mm and t...

Embodiment 3

[0030]This embodiment takes the manufacture of a wide and thin wear-resistant steel plate with a thickness of 6mm, a width of 2600-3100mm, and a Brinell hardness of 450HB as an example. Its 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%, and the rest are Fe and unavoidable impurities.

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

[0032] The molten steel smelted according to the above ratio is vacuum degassed and then continuously cast. The thickness of the continuous casting slab is 150mm. The steel slab is heated to a furnace temperature of 1220°C. The final rolling thickness of the steel plate is 6 mm and t...

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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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