Automobile vanadium-titanium-containing steel alloying smelting method

A smelting method and a steel alloy technology are applied in the alloy smelting field of vanadium-containing titanium steel for automobiles, which can solve the problem of high production cost of vanadium-containing titanium steel, and achieve the effects of saving smelting cost, reducing cost and improving strong plasticity.

Active Publication Date: 2019-04-26
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of high production cost of existing vanadium-containing titanium steel, the invention provides a method for alloying and smelting vanadium-containing titanium steel for automobiles

Method used

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  • Automobile vanadium-titanium-containing steel alloying smelting method
  • Automobile vanadium-titanium-containing steel alloying smelting method
  • Automobile vanadium-titanium-containing steel alloying smelting method

Examples

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Embodiment 1

[0036] Reference attachment figure 1 In the flowchart, an embodiment of the present invention provides a method for alloying and smelting vanadium-containing titanium steel for automobiles, including the following steps:

[0037] Step a. Place a 20kg bag of desulfurizer and 40kg bag of dephosphorizer on the bottom of the empty ladle;

[0038] Step b. Pour 13 tons of vanadium-containing titanium molten iron into a ladle containing a desulfurizing agent and a dephosphorizing agent, and transport it to the tapping port of the converter for standby; wherein the weight percentage of the chemical composition of the vanadium-containing titanium molten iron is as follows: C: 4.0%, V: 0.22%, Ti: 0.15%, P: 0.05%, S: 0.04%, the rest is iron and inevitable impurities, the temperature is 1310°C;

[0039] Step c. Continue smelting the remaining vanadium-containing titanium molten iron through the converter without considering the effect of vanadium extraction. Control the weight percentage of the ...

Embodiment 2

[0043] Reference attachment figure 1 In the flowchart, an embodiment of the present invention provides a method for alloying and smelting vanadium-containing titanium steel for automobiles, including the following steps:

[0044] Step a. Place a 50kg bag of desulfurization agent and an 80kg bag of dephosphorization agent on the bottom of the empty ladle;

[0045] Step b. Pour 17 tons of vanadium-containing titanium molten iron into a ladle containing a desulfurizing agent and a dephosphorizing agent, and transport it to the tap hole of the converter for standby; wherein the weight percentage of the chemical composition of the vanadium-containing titanium molten iron is as follows C: 4.6%, V : 0.30%, Ti: 0.3%, P: 0.068%, S: 0.057%, the rest is iron and inevitable impurities, the temperature is 1390℃;

[0046] Step c. Continue smelting the remaining vanadium-containing titanium molten iron through the converter without considering the effect of vanadium extraction. Control the weight p...

Embodiment 3

[0050] Reference attachment figure 1 In the flowchart, an embodiment of the present invention provides a method for alloying and smelting vanadium-containing titanium steel for automobiles, including the following steps:

[0051] Step a. Place 35kg bag of desulfurizer and 60kg bag of dephosphorizer on the bottom of the empty ladle;

[0052] Step b. Pour 15 tons of vanadium-containing titanium molten iron into a ladle containing a desulfurizing agent and a dephosphorizing agent, and transport it to the tap hole of the converter for standby; wherein, the weight percentage of the chemical composition of the vanadium-containing titanium molten iron is as follows C: 4.3%, V : 0.26%, Ti: 0.22%, P: 0.06%, S: 0.05%, the rest is iron and inevitable impurities, the temperature is 1350℃;

[0053] Step c. Continue smelting the remaining vanadium-containing titanium molten iron through the converter without considering the effect of vanadium extraction. Control the weight percentage of the chemic...

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Abstract

The invention relates to the technical field of steel smelting, and particularly discloses an automobile vanadium-titanium-containing steel alloying smelting method. The method at least comprises thefollowing steps that part of vanadium-titanium-containing molten iron is poured into a steel ladle filled with a desulfurizing agent and a dephosphorizing agent; the rest vanadium-titanium-containingmolten iron continues being smelted by a converter to obtain finishing molten steel, the molten steel is subjected to tapping and poured into the steel ladle to be mixed with the vanadium-titanium-containing molten iron, mixed molten steel is obtained, and in addition, in the finishing molten steel tapping process, the steel ladle is subjected to bottom blowing CO and N2 mixed gas stirring; and the mixed molten steel is refined through an LF, and molten steel of vanadium-titanium-containing steel is obtained. According to the method, through the smelting method that the vanadium-titanium-containing steel for an automobile is directly alloyed, the vanadium-titanium-containing molten iron is maxed with the molten steel smelted by the converter, the effect that the automobile vanadium-titanium-containing steel is subjected to vanadium and titanium alloying through the element vanadium and the element titanium in the vanadium-titanium-containing molten iron is achieved, and the automobilevanadium-titanium-containing steel alloying cost can be remarkably reduced.

Description

Technical field [0001] The invention relates to the technical field of steel smelting, in particular to an alloying smelting method of vanadium-containing titanium steel for automobiles. Background technique [0002] As the world's largest automobile producer, the fast-growing automobile industry has brought huge room for development to my country's steel industry, and at the same time put forward new requirements for automobile lightweight and green environmental protection. Practice has shown that one of the most effective, reliable, and cost-effective ways to achieve automotive lightweighting is to increase the application proportion of automotive advanced high-strength steel and ultra-high-strength steel, and achieve lightweight body through methods such as structural thinning and optimizing the structure of parts. However, with the increase in the strength of automotive advanced high-strength steels, the ductility of materials decreases and the springback increases, which ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064C21C7/072C22C33/06C22C38/02C22C38/04C22C38/12C22C38/14C22C38/06
CPCC21C7/0645C21C7/072C22C33/06C22C38/002C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 田鹏梁静召陈炳蓉张振全刘伟张琳
Owner HEBEI IRON AND STEEL
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