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High-level low-alloy wear-resisting steel plate with Brinell hardness larger than 550 HB and manufacturing method

A 550HB, Brinell hardness technology, used in the field of wear-resistant steel manufacturing, can solve problems such as difficulty in large-scale, lightweight and long-life manufacturing, unsatisfactory hardness, toughness, plasticity and formability, poor welding performance, etc. The effect of good wear resistance, low temperature impact toughness and cold bending formability, best wear resistance

Inactive Publication Date: 2018-05-11
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 their grades are all low, and the hardness, toughness, plasticity and formability are not ideal, and the welding performance is poor, and they do not have excellent wear resistance and corrosion resistance. , it is difficult to meet the needs of large-scale, lightweight and long-life manufacturing of equipment manufacturing, especially for low-alloy wear-resistant steel plates with a Brinell hardness greater than 550HB, and there is no relevant disclosure in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment is a high-grade low-alloy wear-resistant steel plate with a Brinell hardness greater than 550HB. The steel plate includes the following components by weight percentage: C: 0.41%, Si: 0.50%, Mn: 0.56%, P≤0.012%, S≤0.003%, Cr: 0.65%, Mo: 0.36%, Ni: 1.20%, Ti: 0.008-0.030%, Nb: 0.015-0.050%, V: 0.080-0.150%, B: 0.0008-0.0025%, N≤ 0.0040%, O≤0.0025%, and the rest are Fe and unavoidable impurities.

[0027] The manufacturing method of the high-grade low-alloy wear-resistant steel plate with a Brinell hardness greater than 550HB in this embodiment is to carry out continuous casting after vacuum degassing treatment of the molten steel smelted in the above-mentioned ratio, the thickness of the continuous casting slab is 150mm, and the slab is heated to 1180°C The temperature of the furnace is 180min, and then the austenite recrystallization zone rolling and non-recrystallization zone rolling are carried out. The rolling thickness is 12mm. After rolling, it is a...

Embodiment 2

[0029]This embodiment is a high-grade low-alloy wear-resistant steel plate with a Brinell hardness greater than 550HB. The steel plate includes the following components by weight percentage: C: 0.33%, Si: 0.52%, Mn: 0.80%, P≤0.012%, S≤0.003%, Cr: 0.68%, Mo: 0.60%, Ni: 0.95%, Ti: 0.008-0.030%, Nb: 0.015-0.050%, V: 0.080-0.150%, B: 0.0008-0.0025%, N≤ 0.0040%, O≤0.0025%, and the rest are Fe and unavoidable impurities.

[0030] The manufacturing method of the high-grade low-alloy wear-resistant steel plate with a Brinell hardness greater than 550HB in this embodiment is to carry out continuous casting after vacuum degassing treatment of the molten steel that has been smelted in the above ratio. The temperature of the furnace is kept at 200min and then rolled out of the furnace for rolling in the austenite recrystallization zone and non-recrystallization zone. The rolling thickness is 40mm. After rolling, it is air-cooled to room temperature, and then quenched and tempered. The qu...

Embodiment 3

[0032] This embodiment is a high-grade low-alloy wear-resistant steel plate with a Brinell hardness greater than 550HB. The steel plate includes the following components by weight percentage: C: 0.40%, Si: 0.51%, Mn: 0.64%, P≤0.012%, S≤0.003%, Cr: 1.00%, Mo: 0.42%, Ni: 0.80%, Ti: 0.008-0.030%, Nb: 0.015-0.050%, V: 0.080-0.150%, B: 0.0008-0.0025%, N≤ 0.0040%, O≤0.0025%, and the rest are Fe and unavoidable impurities.

[0033] The manufacturing method of the high-grade low-alloy wear-resistant steel plate with a Brinell hardness greater than 550HB in this embodiment is to carry out continuous casting after vacuum degassing treatment of the molten steel smelted in the above ratio, the thickness of the continuous casting slab is 260mm, and the slab is heated to 1220°C The temperature of the furnace is kept at 220 minutes and then rolled out of the furnace for rolling in the austenite recrystallization zone and non-recrystallization zone. The rolling thickness is 25mm. After rolli...

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Abstract

The invention discloses a high-level low-alloy wear-resisting steel plate with Brinell hardness larger than 550 HB. The high-level low-alloy wear-resisting steel plate comprises following components including, by weight percent, 0.33 to 0.41% of C, 0.50 to 0.60% of Si, 0.30 to 0.80% of Mn, not larger than 0.012% of P, not larger than 0.003% of S, 0.30 to 1.00% of Cr, 0.20 to 0.60% of Mo, 0.80 to 1.20% of Ni, 0.008 to 0.030% of Ti, 0.015 to 0.050% of Nb, 0.080 to 0.150% of V, 0.0008 to 0.0025% of B, not larger than 0.0040% of N, not larger than 0.0025% of O and the balance Fe and inevitable impurities. High carbon and alloy component design is adopted, through cooperative effect of carbon, manganese, chromium, nickel, molybdenum, copper and other alloy elements, and micro alloy elements ofniobium, titanium, vanadium and the like, through the auxiliary controlled rolling and offline heat treatment method, the obtained steel plate has the high level with the Brinell hardness larger than550 HB, and -20 DEG C low-temperature impact toughness is larger than or equal to 20J.

Description

technical field [0001] The invention relates to the field of wear-resistant steel manufacturing, in particular to a high-grade low-alloy wear-resistant steel plate with a Brinell hardness greater than 550HB and a manufacturing method thereof. 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 w...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/50C22C38/48C22C38/46C22C38/54C21D8/02C21D1/18C21D6/00
CPCC21D1/18C21D6/004C21D6/005C21D6/008C21D8/0205C21D8/0226C21D8/0247C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54
Inventor 姜在伟邓想涛闫强军王昭东杨柳靳建锋吴俊平
Owner NANJING IRON & STEEL CO LTD
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