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Method for increasing yield of IF steel alloy

A technology of yield and steel alloy, which is applied in the field of improving the yield of IF steel alloy, can solve the problems of low alloy yield and achieve the effect of improving alloy yield and alloy yield

Active Publication Date: 2018-06-29
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a method for improving the yield of IF steel alloy, which is used to solve the technical problem of low alloy yield due to the particle size of the alloy, the timing of adding the alloy, and the end point of the converter in the steelmaking production process, so as to reduce the yield of the alloy. Consumption of ferromanganese, ferroaluminum and ferrotitanium, improved alloy yield, simple process and easy to operate technical effect

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  • Method for increasing yield of IF steel alloy

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Embodiment 1

[0023] figure 1 It is a schematic flowchart of a method for improving the uniformity of the uncoiling oil film of a cold-rolled galvanized sheet in an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0024] Step 1: Control the oxygen activity of the converter tapping molten steel within 500ppm.

[0025] Further, in the step 1, the incoming oxygen activity is reduced, and the decarburization conditions need to be guaranteed.

[0026] Specifically, the IF steel is the abbreviation of Interstitial Free Steel, that is, interstitial-free steel, sometimes also called ultra-low carbon steel, which has excellent deep drawing performance and has been widely used in the automobile industry. In IF steel, due to the low content of C and N, a certain amount of titanium, niobium and other strong carbon-nitrogen compound forming elements are added to completely fix the carbon, nitrogen and other interstitial atoms in ultra-low carbon steel into carbon...

Embodiment 2

[0041] A kind of method of improving IF steel alloy yield of the present invention is described in detail below, specifically as follows:

[0042] In an embodiment of the present invention, a method for increasing the yield of IF steel alloy is provided. Firstly, in the process of controlling the end point of the converter, the oxygen at the end point of the converter smelting is controlled within 500ppm, the slag is used to tap the steel, and the target slag thickness at the refining station is ≤130mm; secondly, during the RH refining process, the RH entering station temperature is controlled at 1640°C; Oxygen blowing is carried out within 4 minutes of the start of vacuuming, and the oxygen blowing volume is 80m 3 ; The refining period is 45min, and the pure cycle time is 6min; control the basicity R and oxidation of the slag in the RH refining process, that is, control the refining slag SiO 2 The CaO content in the slag is C / A=1.7 with a content of 7% and a slag oxidizing p...

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Abstract

The invention discloses a method for increasing yield of IF steel alloy, and relates to the technical field of steel-making. The method comprises the following steps: 1, controlling the oxygen activity of molten steel, obtained by means of converter tapping, to be within 500ppm; 2, avoiding the RH aluminum oxygen heating during RH refining; controlling the RH oxygen blowing amount to be within 100m<3> when the RH aluminum oxygen heating treatment is necessary; 3, after RH decarburization is finished, adding alloy; 4, controlling the SiO2 content in RH refining slag to be 6-8%, using the totalconcentration of FeO and MnO to indicate slag oxidation, wherein the slag oxidation is less than 10 %. The method solves the technical problems of low alloy yield due to the particle size of the alloy, the addition time of the alloy, the end point of a converter, and the like in a steelmaking production process, and achieves the technical effects of reducing the consumption of ferromanganese, aluminum iron and ferrotitanium, increasing the alloy yield, and being simple in process and easy to operate.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a method for increasing the yield of IF steel alloys. Background technique [0002] In the process of steelmaking production, the ratio of the output of steel billets produced per unit time to the sum of steel materials and other alloy materials consumed in the production of this batch of steel billets is called the metal yield per unit time. Alloy yield reflects the loss of steel materials and other alloy materials in the steelmaking process, and is an important indicator of the process and technical operation of steelmaking equipment. However, the yield of the alloy will be affected by many factors in the actual production process, such as the particle size of the alloy, the timing of adding the alloy and the end point of the converter, etc., which will affect the yield of the alloy. Contents of the invention [0003] The invention provides a method for improving the yie...

Claims

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Application Information

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IPC IPC(8): C21C7/10C21C7/068C21C7/076C22C33/06
CPCC21C7/068C21C7/076C21C7/10C22C33/06Y02P10/20
Inventor 唐德池
Owner SHOUGANG CORPORATION
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