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22SiMn2B steel plate for construction machine and production method of 22SiMn2B steel plate

A technology for construction machinery and production methods, applied in the field of metallurgy, can solve problems such as the reduction of steel properties, and achieve the effects of high density, stable quality and pure steel.

Inactive Publication Date: 2018-02-23
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

22SiMn2B steel is used for welding joints of loader buckets. Adding a small amount of boron to the steel can significantly change the properties of the steel. The main function of boron is to improve hardenability. Excessive boron or improper heat treatment will lead to boron phase precipitation, making Reduced performance of steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The thickness of 22SiMn2B steel plate for engineering machinery in this example is 10 mm, and its chemical composition and mass percentage are: C: 0.19%, Si: 0.70%, Mn: 1.85%, P: 0.015%, Ti: 0.040%, B: 0.0016%, the balance is Fe and unavoidable impurities.

[0018] The production method of the 22SiMn2B steel plate for construction machinery in this embodiment includes steelmaking, continuous casting, heating and rolling processes, and the specific process steps are as follows:

[0019] (1) Steelmaking process: During the LF refining process, argon is blown throughout the process, and the white slag is kept for 25 minutes. During the VD vacuum treatment process, the vacuum degree is 63 Pa, and the vacuum is kept for 15 minutes;

[0020] (2) Continuous casting process: during the continuous casting process, the superheat is controlled at 15°C, and the steel billets are stacked and slowly cooled for 18 hours;

[0021] (3) Heating process: the billet is heated in a continu...

Embodiment 2

[0025] The thickness of the 22SiMn2B steel plate used in construction machinery in this embodiment is 24mm, and its chemical composition and mass percentage are: C: 0.25%, Si: 1.00%, Mn: 1.50%, P: 0.015%, Ti: 0.010%, B: 0.035%, the balance is Fe and unavoidable impurities.

[0026] The production method of the 22SiMn2B steel plate for construction machinery in this embodiment includes steelmaking, continuous casting, heating and rolling processes, and the specific process steps are as follows:

[0027] (1) Steelmaking process: During the LF refining process, argon is blown throughout the process, and the white slag is kept for 30 minutes; during the VD vacuum treatment process, the vacuum degree is 64Pa, and the vacuum is kept for 20 minutes;

[0028] (2) Continuous casting process: during the continuous casting process, the superheat is controlled at 25°C, and the billets are stacked and slowly cooled for 19 hours;

[0029] (3) Heating process: the billet is heated in a cont...

Embodiment 3

[0033] The thickness of 22SiMn2B steel plate for engineering machinery in this embodiment is 34mm, and its chemical composition and mass percentage are: C: 0.23%, Si: 0.82%, Mn: 1.65%, P: 0.015%, Ti: 0.060%, B: 0.0005%, the balance is Fe and unavoidable impurities.

[0034] The production method of the 22SiMn2B steel plate for construction machinery in this embodiment includes steelmaking, continuous casting, heating and rolling processes, and the specific process steps are as follows:

[0035] (1) Steelmaking process: During the LF refining process, argon is blown throughout the process, and the white slag is kept for 27 minutes; during the VD vacuum treatment, the vacuum degree is 62 Pa, and the vacuum is kept for 17 minutes;

[0036] (2) Continuous casting process: during the continuous casting process, the superheat is controlled at 21°C, and the steel billets are stacked and slowly cooled for 20 hours;

[0037] (3) Heating process: the billet is heated in a continuous fu...

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Abstract

The invention discloses a 22SiMn2B steel plate for a construction machine and a production method of the 22SiMn2B steel plate. The steel plate comprises, by mass percentages, 0.19-0.25% of C, 0.70-1.00% of Si, 1.50-1.85% of Mn, not larger than 0.025% of P, 0.010-0.060% of Ti, 0.0005-0.035% of B and the balance Fe and inevitable impurities. The production method comprise the steps of steel making,continuous casting, heating and rolling processes; and an II-type rolling control process is adopted for the rolling process. By the adoption of the method, the Brinell hardness of the surface of thesteel plate produced by the method is less than or equal to 230 HB and the surface roughness is less than or equal to 5 mm / 1 m. The produced steel plate has the beneficial effects of being pure in steel quality, high in density and stable in quality, and the performance of the steel plate meets the requirements. The steel plate produced by the method is low in production cost, and mass productioncan be achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a 22SiMn2B steel plate for engineering machinery and a production method thereof. Background technique [0002] 22SiMn2B steel is a high-strength manganese-resistant steel. It is mainly used in harsh working conditions such as impact, extrusion, and material wear. The damage form is mainly wear and tear, and some parts are broken and deformed. 22SiMn2B steel is used for welding joints of loader buckets. Adding a small amount of boron to the steel can significantly change the properties of the steel. The main function of boron is to improve hardenability. Excessive boron or improper heat treatment will lead to boron phase precipitation, making The performance of steel is reduced. 22SiMn2B steel is widely used because of its simple chemical composition and good process performance. With the continuous development of the machinery industry, the performance requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/14C21D8/02
CPCC22C38/02C21D8/0226C22C38/002C22C38/04C22C38/14
Inventor 邓建军李杰龙杰王甜甜尹卫江瞿征李志琼肖雄峰
Owner WUYANG IRON & STEEL
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