Continuous casting billet formed A387Gr11C12 steel plate and production method thereof

A technology of a387gr11cl2 and production method, which is applied in the field of metallurgy, can solve problems such as fluctuations in performance and difficulty in ensuring plate shape, and achieve the effects of good plate shape, mass production, and excellent internal quality

Inactive Publication Date: 2018-08-14
WUYANG IRON & STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] American Standard A387Gr11Cl2 steel belongs to low-alloy container steel. Due to the addition of Cr and Mo alloy elements in the composition, it has excellent heat resistance and hydrogen resistance. It is widely used in the production and manufacture of large-scale pressure vessel fittings. The demand for raw material steel plates is increasing, and at the same time, the requirements for steel plates are getting higher and higher. Thin gauge steel plates for pipe fittings have strict performance requirements. In addition to the premise of excellent tensile properties in the delivery state, the hardness of steel plates is required to be relatively low. In addition, in the production of thin-gauge steel plates, it is easy to have problems such as difficulty in guaranteeing the shape of the plate and fluctuations in performance

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  • Continuous casting billet formed A387Gr11C12 steel plate and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] The thickness of the A387Gr11Cl2 steel plate in this embodiment is 20 mm, and its chemical composition and mass percentage are: C: 0.09%, Si: 0.86%, Mn: 0.73%, P: 0.008%, S: 0.005%, Cr : 1.56%, Mo: 0.60%, Sn: 0.002%, the balance is Fe and unavoidable impurities.

[0020] The production method of the continuous casting billet finished A387Gr11Cl2 steel plate of this embodiment comprises: steelmaking, continuous casting, heating, rolling and heat treatment process, heat treatment process adopts normalizing+tempering process, and concrete process step is as follows:

[0021] (1) Steelmaking process: Converter smelting, LF furnace refining, VD vacuum treatment process; LF furnace refining white slag retention time 23min, VD vacuum treatment vacuum degree 65Pa, vacuum retention time 20min;

[0022] (2) Continuous casting process: In the continuous casting process, an arc continuous casting machine is used to control the continuous casting casting speed to 0.6m / min, and the c...

Embodiment 2

[0028] The thickness of the A387Gr11Cl2 steel plate produced by continuous casting in this embodiment is 22.3mm, and its chemical composition and mass percentage are: C: 0.15%, Si: 0.48%, Mn: 0.40%, P: 0.007%, S: 0.004%, Cr: 0.94%, Mo: 0.55%, Sn: 0.003%, and the balance is Fe and unavoidable impurities.

[0029] The production method of the continuous casting billet finished A387Gr11Cl2 steel plate of this embodiment comprises: steelmaking, continuous casting, heating, rolling and heat treatment process, heat treatment process adopts normalizing+tempering process, and concrete process step is as follows:

[0030] (1) Steelmaking process: Converter smelting, LF furnace refining, VD vacuum treatment process; LF furnace refining white slag retention time 25min, VD vacuum treatment vacuum degree 64Pa, vacuum retention time 25min;

[0031] (2) Continuous casting process: In the continuous casting process, an arc continuous casting machine is used to control the continuous casting c...

Embodiment 3

[0037] The thickness of the A387Gr11Cl2 steel plate produced by continuous casting in this embodiment is 25.4mm, and its chemical composition and mass percentage are: C: 0.12%, Si: 0.52%, Mn: 0.46%, P: 0.007%, S: 0.005%, Cr: 1.35%, Mo: 0.70%, Sn: 0.002%, and the balance is Fe and unavoidable impurities.

[0038] The production method of the continuous casting slab into a material A387Gr11Cl2 steel plate in this embodiment comprises: steelmaking, continuous casting, heating, rolling and heat treatment process, the heat treatment process adopts normalizing+tempering process, and the specific process steps are as follows:

[0039] (1) Steelmaking process: Converter smelting, LF furnace refining, VD vacuum treatment process; LF furnace refining white slag retention time 26min, VD vacuum treatment vacuum degree 62Pa, vacuum retention time 23min;

[0040] (2) Continuous casting process: In the continuous casting process, an arc continuous casting machine is used to control the conti...

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Abstract

The invention discloses a continuous casting billet formed A387Gr11C12 steel plate and a production method of the continuous casting billet formed A387Gr11C12 steel plate. The continuous casting billet formed A387Gr11C12 steel plate comprises, by mass, 0.09%-0.15% of C, 0.48%-0.86% of Si, 0.40%-0.73% of Mn, not larger than 0.012% of P, not larger than 0.010% of S, 0.94%-1.56% of Cr, 0.55%-0.70% ofMo, not larger than 0.015% of Sn and the balance Fe and inevitable impurities. The production method comprises the procedures of steel making, continuous casting, heating, rolling and heat treatment.The heat treatment procedure adopts the normalization and tempering technology. The strength and hardness of the steel plate completely meet the technical requirements, plate shape control is good, the internal quality and mechanical property of the steel plate are good, and the steel plate completely meets the requirements for pipe fitting steel. The technological process is convenient to achieve, batch production can be completely achieved, and the economic benefits of an enterprises are greatly increased.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to an A387Gr11Cl2 steel plate produced by continuous casting billet and a production method thereof. Background technique [0002] American Standard A387Gr11Cl2 steel belongs to low-alloy container steel. Due to the addition of Cr and Mo alloy elements in the composition, it has excellent heat resistance and hydrogen resistance. It is widely used in the production and manufacture of large-scale pressure vessel fittings. The demand for raw material steel plates is increasing, and at the same time, the requirements for steel plates are getting higher and higher. Thin gauge steel plates for pipe fittings have strict performance requirements. In addition to the premise of excellent tensile properties in the delivery state, the hardness of steel plates is required to be relatively low. , In addition, in the production of thin-gauge steel plates, it is easy to have problems...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/22C21D8/02C21D1/28C21D1/18
CPCC22C38/02C21D1/18C21D1/28C21D8/0226C22C38/008C22C38/04C22C38/22
Inventor 李杰尹卫江龙杰袁锦程吴艳阳王甜甜牛红星李样兵侯敬超王东阳
Owner WUYANG IRON & STEEL
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