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A smelting method for controlling the form of boron in steel

A smelting method and form technology, applied in the field of smelting to control the form of boron in steel, can solve the problems of lack of form, low proportion of solid solution boron, etc., to reduce vacuum process, reduce boron oxides and nitrides Generate, enhance the effect of the effect

Active Publication Date: 2018-11-20
武汉钢铁有限公司
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Problems solved by technology

[0005] The invention provides a smelting method for controlling the form of boron in steel, which solves the technical problems of the low proportion of solid-solution boron in boron microalloy steel and the lack of an effective method for controlling its form in the prior art

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  • A smelting method for controlling the form of boron in steel
  • A smelting method for controlling the form of boron in steel
  • A smelting method for controlling the form of boron in steel

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Embodiment Construction

[0036] The embodiment of the present application provides a smelting method for controlling the form of boron in the steel to solve the technical problems of the low proportion of solid-solution boron in the boron microalloy steel in the prior art and the lack of an effective method for controlling its form; The technical effect of controlling oxygen and nitrogen fixation and increasing the proportion of solid solution boron.

[0037] In order to solve the above technical problems, the general idea of ​​the technical solution provided by the embodiment of the present application is as follows:

[0038] A smelting method for controlling the form of boron in steel, comprising the following steps:

[0039] Oxygen blowing smelting, at the beginning of tapping, pure aluminum block is added along with the steel stream for pre-deoxidation; at the end of tapping, silicon-manganese is added along with the steel stream for final deoxidation;

[0040] Argon station blowing, soft blowing...

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Abstract

The invention belongs to the technical field of steelmaking, and discloses a smelting method for controlling an existing form of boron in steel. The smelting method comprises the following steps of blowing oxygen and smelting: at the early stage of steel tapping, pure aluminum blocks are added along with the flow of steel for pre-deoxidation, and at the final stage of steel tapping, silicomanganese is added along with the flow of steel for final deoxidation; blowing at an argon station: soft blowing is performed for 15 to 20 min; adding silicon carbide for slag surface diffusion deoxidation at the early stage of LF refining; performing titanium micro alloying, and adding ferrotitanium for fixing nitrogen at the middle stage of LF refining; performing boron micro alloying, and adding ferroboron at the final stage of LF refining; performing LF soft blowing for 30 to 40 min; performing continuous casting: casting is protected by adopting a long nozzle and a submersed nozzle. The invention provides the smelting method for increasing the duty cycle of solid solution boron.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a smelting method for controlling the form of boron in steel. Background technique [0002] The main function of boron in low-carbon steel and low-alloy steel is to improve hardenability. The addition of a small amount of boron can significantly improve the hardenability of steel, thereby saving precious elements such as nickel, chromium and molybdenum, and achieving low-cost and high-performance goals; further, A small amount of boron in high carbon steel is beneficial to reduce the chemical inhomogeneity of the slab, refine the columnar crystals, form the best metallographic structure, such as fine scattered pearlite, and reduce age hardening; the high carbon microalloyed by boron Wire rod has high process plasticity when it is drawn into metal products, and it is beneficial to improve the hardenability of cord steel; therefore, boron microalloying is widely used. But only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00C21C7/06
CPCC21C7/0006C21C7/06C21C2007/0018
Inventor 张帆桂江兵任安超丁礼权张贤忠夏艳花鲁修宇
Owner 武汉钢铁有限公司
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