High-strength high-plasticity copper-containing high-carbon TWIP steel and preparation process thereof

A preparation process and high plasticity technology, applied in the field of alloy steel structures, can solve the problems of increasing the economic cost of steel, increasing the difficulty of production, and difficult to remove Cu, and achieving the effects of optimizing performance, reducing the difficulty and cost of steelmaking, and a simple preparation method.

Inactive Publication Date: 2011-01-26
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the Cu content in steel is generally very low (≤0.05%), but Cu in molten steel is difficult to remove, and it is necessary to further reduce the Cu content in steel, which often increases the economic cost of steel and increases the difficulty of production

Method used

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  • High-strength high-plasticity copper-containing high-carbon TWIP steel and preparation process thereof
  • High-strength high-plasticity copper-containing high-carbon TWIP steel and preparation process thereof
  • High-strength high-plasticity copper-containing high-carbon TWIP steel and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038](1) Ingredients: Industrial pig iron (1.0% Si, 4.0% C, the rest is Fe, wt%) is used as the basic raw material, electrolytic manganese with a purity of 99.8% and high-purity copper with a purity of 99.95% are used as alloy raw materials, according to The mass fraction (wt%) is formulated as a copper-containing high-carbon alloy with the following chemical components: C: 1.35%, Mn: 20.4%, Cu: 3.4%, rare earth Ce: 0.22%, and the balance is Fe.

[0039] (2) Smelting: Melt the prepared raw materials in vacuum arc melting at a temperature of 1650°C and cast them into ingots.

[0040] (3) Solution treatment: Heat the ingot to 1000°C for solution treatment, heat it for 4 hours and then hot-roll it.

[0041] (4) Hot rolling: Heat the sample to 1050°C for 4 hours and then use a two-roller hot rolling mill for hot rolling. The final rolling temperature is not lower than 750°C. When the plate temperature is lower than 750°C, put it back into the furnace for heating. After hol...

Embodiment 2

[0046] (1) Ingredients: Using the raw materials of Example 1, the chemical composition is prepared according to the mass fraction (wt%): C: 1.25%, Mn: 20.7%, Cu: 4.3%, rare earth Ce: 0.24%, and the balance is Fe Copper-containing high-carbon alloys.

[0047] (2) Smelting: The prepared raw materials are smelted in vacuum arc melting, and the smelting temperature is 1700°C.

[0048] (3) Solution treatment: heat the sample to 1052°C in a protective atmosphere of charcoal powder (the sample is placed in a stainless steel box filled with charcoal powder) and keep it warm for 4.5h. The main purpose of using a protective atmosphere is to prevent oxidation and decarburization of the surface of the steel plate.

[0049] (4) Hot rolling: quickly place the sample in step 3) on a hot rolling mill for rolling. The starting rolling temperature is 1000°C, the final rolling temperature is kept at 840°C, and the deformation amount of each pass is 10%. After 6 times Rolling, the tota...

Embodiment 3

[0054] (1) Ingredients, smelting: According to the mass fraction (wt%), the chemical composition is prepared as follows: C: 1.1%, Mn: 19.5%, Cu: 4.5%, rare earth Ce: 0.21%, and the balance is Fe. The prepared raw materials It is smelted in vacuum arc melting, and the smelting temperature is 1680°C.

[0055] (2) The solution treatment temperature is 1055°C, hold for 5 hours,

[0056] (3) Hot rolling: quickly place the sample in step 2) on a hot rolling mill for rolling. The starting rolling temperature is 1055°C, the final rolling temperature is kept at 840°C, and the deformation amount of each pass is 12%. After 5 times Rolling, the total rolling deformation is 60%, and the last pass is directly water quenched after rolling.

[0057] (4) Cold rolling: the hot-rolled alloy is subjected to controlled rolling in separate passes on the K03-60 two-roller mill. The deformation of each rolling is controlled at 8%, and the rolling thickness is about 1.5mm. , The rolling ...

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Abstract

The invention relates to high-strength high-plasticity copper-containing high-carbon TWIP steel and a preparation process thereof. In the preparation process, the carbon content is improved on the basis of Fe-Mn-C series TWIP steel, a non-carbide forming element Cu and rare earth Ce serving as alloying elements are added into the steel, and a solution treatment process at the high temperature of between 900 and 1,050 DEG C and a hot rolling process are combined, so that gap defects in an ingot structure are reduced and the intrinsic strength and plasticity of the high-carbon copper-containing TWIP steel are fully exerted. The prepared alloy steel has the outstanding characteristic that product of strength and plasticity for reflecting the comprehensive mechanical property of the alloy steel is obviously improved; the yield strength of the alloy steel is 513.7MPa, the tensile strength is 1,223.7MPa, the elongation is 86.8 percent, and the product of strength and plasticity reaches 106,217.2MPa. percent which is 20 percent higher than highest data 87,882MPa. percent of multiple kinds of TWIP steel reported by domestic and foreign documents at present; and novel high-strength high-toughness steel is prepared for the mechanical manufacturing industry and equipment industry.

Description

technical field [0001] The invention belongs to the field of alloy steel structures, and more specifically relates to a high-strength, high-plasticity copper-containing high-carbon TWIP steel and a preparation process thereof. Background technique [0002] With the rapid development of the modern economy, users of steel materials have put forward higher requirements for the performance and technical indicators of steel materials. In the new century, construction machinery, ships, weapons and equipment, large storage containers, hydropower and thermal power energy equipment, and high-rise buildings all require new steel materials with high performance, long service life and low cost. And with the further development of society, the production, processing and use of steel materials have also put forward the requirements of resource saving, energy saving and environmental protection. Therefore, the development of advanced steel materials has become an urgent need for economic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C33/04C21D8/00
Inventor 朱定一易韦发杨泽斌林淑梅
Owner FUZHOU UNIV
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