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Production process of ultra-wide steel plate

A production process and steel plate technology, which is applied in the production process field of ultra-wide steel plates, can solve the problems of difficult control of rolling plates, high alloy composition, and large thermal deformation resistance, and achieves overcoming difficulties in rolling process, high alloy composition, elimination of effect of stress

Active Publication Date: 2019-08-30
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hot-rolled steel strips are generally used in China. Because they are rolled and rolled, the width is small, and the width is usually only below 1500mm. Therefore, the use is limited, and it is difficult to meet the use of large saw blades and welded liners.
However, ultra-wide steel plates must be produced by wide and thick plate rolling mills. Domestic wide and thick plate rolling mills are roughly divided into 3500mm, 4300mm, and 5300mm type rolling mills. The thickness of 50Mn2V products is relatively thin. , High thermal deformation resistance, very difficult to control the rolling plate shape, especially easy to bend and scrap, and difficult to produce

Method used

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  • Production process of ultra-wide steel plate
  • Production process of ultra-wide steel plate

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Experimental program
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Effect test

Embodiment 1

[0032] The thickness of the 50Mn2V steel plate for the ultra-wide specification saw blade substrate processed in this embodiment is 8mm, and the width is 4200mm, and its composition is calculated by mass percentage as C: 0.53%, Si: 0.27%, Mn: 1.60%, P: 0.012 %, S: 0.002%, V: 0.13%, Cr: 0.20%, Ni: 0.05%, Cu: 0.016%, Ni: 0.012%, the balance is iron and unavoidable impurity elements; carbon equivalent = 0.85.

[0033] The saw blade substrate is prepared with 50Mn2V steel plate using the following process:

[0034]1) Billet smelting: molten steel is smelted in a converter, sent to LF refining furnace and RH refining furnace for refining. After the RH furnace is finished, the hydrogen content is 0.68ppm, and then the continuous casting is cast at a constant speed of 0.1m / min. The cast billet, after final cutting, has a size of about 150mm×2600mm×3500mm.

[0035] 2) Heating process: use continuous furnace heating, strictly control the heating time and heating temperature of each se...

Embodiment 2

[0045] The thickness of the steel 50Mn2V for the ultra-wide specification saw blade substrate of this embodiment is 10mm, and the width is 4150mm, and its composition is calculated by mass percentage: C: 0.53%, Si: 0.27%, Mn: 1.60%, P: 0.012% , S: 0.002%, V: 0.13%, Cr: 0.20%, Ni: 0.05%, Cu: 0.016%, Ni: 0.012%, and unavoidable impurity elements; carbon equivalent = 0.85

[0046] The 50Mn2V steel plate used for the saw blade substrate with a thickness of 10mm and a width of 4150mm is prepared by the following process:

[0047] 1) Billet smelting: molten steel is smelted by converter, sent to LF refining furnace and RH refining furnace for refining. After the RH furnace is finished, the hydrogen content is 0.70ppm, and then the continuous casting is cast at a constant speed of 0.1m / min, and the casting Billet, after cutting, the billet size is about 150×2600×3200mm.

[0048] 2) Heating process: use continuous furnace heating, strictly control the heating time and heating tempera...

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Abstract

The invention relates to a production process of an ultra-wide steel plate. The maximum width of the produced steel plate can reach 4200 mm, and the steel plate can meet the using needs of domestic large-scale diamond saw blade bases and welding lining plates. According to the production process, a 4300 mm type four-roller reversible type rolling mill is adopted for production, and the working procedures include smelting continuous casting, heating, rolling, straightening, heat treatment and the like; and the flatness of the finished steel plate is smaller than or equal to 5 mm / m, the production process is at the domestic leading position, and a user does not need to carry out plate type rescuing again. After heat treatment is carried out by a customer on the steel plate, the range of tensile strength is 980 Mpa-1100 Mpa, the range of yield strength is 780 Mpa-850 Mpa, the range of elongation is 19.1%-26.4%, and the comprehensive mechanical properties are excellent.

Description

technical field [0001] The invention relates to a production process of a 50Mn2V steel plate for an ultra-wide saw blade substrate. Background technique [0002] 50Mn2V belongs to a high-carbon and high-vanadium alloy structural steel with good hardenability. After heat treatment, it has good matrix strength, wear resistance and welding performance. It can be used as a diamond saw blade matrix, lightweight molds, springs, etc. [0003] Hot-rolled steel strips are generally used in China. Because they are rolled and rolled, the width is small, and the width is usually only below 1500mm. Therefore, the use is limited, and it is difficult to meet the use of large saw blades and welded liners. However, ultra-wide steel plates must be produced by wide and thick plate rolling mills. Domestic wide and thick plate rolling mills are roughly divided into 3500mm, 4300mm, and 5300mm type rolling mills. The thickness of 50Mn2V products is relatively thin. , High resistance to thermal de...

Claims

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Application Information

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IPC IPC(8): C21D8/02C22C38/02C22C38/42C22C38/46C22C38/58B21B1/34B21C37/02
CPCB21B1/34B21C37/02C21D8/0205C21D2211/00C22C38/02C22C38/42C22C38/46C22C38/58
Inventor 韩雷宁康康周东辉屈志国李科李德晓
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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