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A kind of on-line quenching HB400 wear-resistant steel plate and preparation method

A technology of wear-resistant steel plate and steel plate, which is applied in the field of high-strength wear-resistant steel plate preparation, can solve the problems of adding more alloy elements, high manufacturing cost, and long production process, and achieve excellent comprehensive performance, low cost, and improved plasticity and toughness indicators Effect

Active Publication Date: 2020-04-10
贝斯山钢(山东)钢板有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Aiming at the problems of more alloying elements added, long production process, and high manufacturing cost in the prior art, the present invention provides a HB400 grade wear-resistant steel plate with a thickness of 8-20mm in-line quenching and a manufacturing method thereof. The thickness range of the wear-resistant steel plate is 8-20mm, the tensile strength range is 1250-1430MPa, the elongation (A50) range is 15-18%, the hardness value range is 370-430HBW, the impact toughness at -20°C is ≥50J, and the flatness of the steel plate meets the requirements ≤6mm / 2m; The design of the manufacturing method of the wear-resistant steel plate is reasonable, giving full play to the advantages of each control process, ensuring the uniformity of the performance of the steel plate, effectively eliminating the influence of the residual internal stress of the steel plate, and improving the subsequent processing performance of the steel plate such as cutting and welding

Method used

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  • A kind of on-line quenching HB400 wear-resistant steel plate and preparation method
  • A kind of on-line quenching HB400 wear-resistant steel plate and preparation method
  • A kind of on-line quenching HB400 wear-resistant steel plate and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Example 1 An online quenched HB400 wear-resistant steel plate with a thickness of 8mm.

[0054] The chemical composition and weight percentage content of the steel plate produced according to the method of the present invention are: C: 0.18%, Si: 0.30%, Mn: 0.25%, P: 0.008%, S: 0.003%, Alt: 0.035%, Ni: 0.12%, Cr: 0.80%, Mo: 0.18%, Ti: 0.013%, N: 0.0030%, H: 0.00011%, and the rest are Fe and trace impurities.

[0055] The thickness of a HB400 grade wear-resistant steel plate quenched online in this embodiment is 8mm, and the preparation method is as follows:

[0056] (1) Smelting: The molten iron is processed by KR pretreatment, 120-ton top-bottom combined blowing converter smelting, 120-ton LF ladle furnace refining, 120-ton RH vacuum degassing refining and slab continuous casting machine to obtain a section size of 200mm× 1800mm continuous casting slab.

[0057] (2) Continuous casting slab conditions: the heating temperature of the continuous casting slab is controll...

Embodiment 2

[0062] Example 2 The thickness of the steel plate is 10 mm.

[0063] The chemical composition and weight percentage content of the steel plate produced according to the method of the present invention are: C: 0.17%, Si: 0.35%, Mn: 0.28%, P: 0.006%, S: 0.003%, Alt: 0.037%, Ni: 0.13%, Cr: 0.82%, Mo: 0.16%, Ti: 0.013%, N: 0.0033%, H: 0.00014%, and the rest are Fe and trace impurities.

[0064] The production and preparation process of the HB400 grade wear-resistant steel plate quenched online in this embodiment and the thickness of the continuous casting slab are the same as in Embodiment 1, the difference is that:

[0065] The thickness of the steel plate is 10mm. The starting rolling temperature of the austenite non-recrystallized zone is 980°C, and the starting rolling thickness of the austenite non-recrystallized zone is 100mm. On-line quenching heat treatment: the initial water cooling temperature is 910°C, the final cooling temperature is 120°C; the tempering temperature ...

Embodiment 3

[0067] Example 3 The thickness of the steel plate is 12mm.

[0068] The chemical composition and weight percentage content of the steel plate produced according to the method of the present invention are: C: 0.16%, Si: 0.32%, Mn: 0.24%, P: 0.005%, S: 0.003%, Alt: 0.039%, Ni: 0.14%, Cr: 0.86%, Mo: 0.18%, Ti: 0.017%, N: 0.0023%, H: 0.00011%, and the rest are Fe and trace impurities.

[0069] The production and preparation process of the HB400 grade wear-resistant steel plate quenched online in this embodiment and the thickness of the continuous casting slab are the same as in Embodiment 1, the difference is that:

[0070] The thickness of the steel plate is 12mm. The starting rolling temperature of the austenite non-recrystallized zone is 990°C, and the starting rolling thickness of the austenite non-recrystallized zone is 100mm. On-line quenching heat treatment: the initial water cooling temperature is 910°C, the final cooling temperature is 140°C; the tempering temperature i...

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Abstract

The invention relates to the technical field of high-strength wear-resistant steel plate preparation, in particular to an on-line quenched HB400-grade wear-resistant steel plate and a preparation method thereof. The steel plate comprises the following components of, in percentage by weight, 0.15%-0.18% of C, 0.30%-0.60% of Si, 0.22%-0.40% of Mn, less than or equal to 0.010% of P, less than or equal to 0.003% of S, 0.025%-0.050% of Alt, 0.10%-0.25% of Ni, 0.80%-1.00% of Cr, 0.15%-0.30% of Mo, 0.010%-0.030% of Ti, less than or equal to 0.0050% of N, less than or equal to 0.00015% of H, the balance Fe and trace impurities. The thickness of the steel plate is 8-20 mm. According to the preparation method, the manufactured wear-resistant steel plate is characterized in that the hardness value ofthe wear-resistant steel plate is 370 HBW-430 HBW, the tensile strength is 1250-1430 MPa, the elongation percentage (A50) ranges from 15% to 18%, the impact toughness value at 20 below zero is greater than or equal to 50J, excellent wear resistance is provided, meanwhile, excellent low-temperature impact toughness is provided, and wear-resistant steel plate is suitable for being used under severeworking conditions such as mining machinery and the like. In addition, different from the conventional off-line conditioning process, the wear-resistant steel plate manufactured by the method is produced by adopting an online quenching and off-line tempering process, the remarkable advantages of short production process and low manufacturing cost is realized.

Description

technical field [0001] The invention relates to the technical field of preparation of a high-strength wear-resistant steel plate, in particular to an on-line quenched HB400 wear-resistant steel plate and a preparation method thereof. Background technique [0002] Low-alloy high-strength wear-resistant steel plates have been developed in recent decades. They have good machinability and excellent wear resistance. The service life is several times that of traditional structural steel plates. The production process is simple. Japan, Germany and Sweden, etc. Some steel companies in China produce low-alloy high-strength wear-resistant steel. [0003] In recent years, with the continuous improvement of my country's technological equipment, the production of low-alloy wear-resistant steel plates has gradually become large-scale, and has been widely used in coal mining machinery, engineering machinery, port machinery, mining equipment, dump trucks and other fields. In particular, NM3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C38/44C22C38/06C22C38/04C22C38/02C22C33/04C21D8/02C21D1/18
CPCC21D1/18C21D8/0205C22C33/04C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/44C22C38/50
Inventor 彭宾王振华杜海涛侯东华李士安李永亮曾凡钊乔松王杰王旭峰
Owner 贝斯山钢(山东)钢板有限公司
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