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A kind of lightweight fatigue-resistant hot-rolled dual-phase wheel steel and production method thereof

A production method and wheel steel technology, applied in the field of metallurgy, can solve the problems of high stress and buckling of steel plates, and achieve the effects of making up for cooling capacity, enhancing fatigue strength, and reducing cooling strength

Active Publication Date: 2020-11-03
HANDAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coiling temperature of the above two patents is below 200°C, which requires the coiling equipment to have a strong coiling capacity, and the internal stress of the steel plate is relatively large, and there will be buckling defects after processing the falling disc material

Method used

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  • A kind of lightweight fatigue-resistant hot-rolled dual-phase wheel steel and production method thereof
  • A kind of lightweight fatigue-resistant hot-rolled dual-phase wheel steel and production method thereof
  • A kind of lightweight fatigue-resistant hot-rolled dual-phase wheel steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this example, the lightweight fatigue-resistant hot-rolled dual-phase wheel steel has a thickness specification of 10 mm, and its chemical composition and mass percentage are: C: 0.06%, Si: 0.75%, Mn: 1.22%, Cr: 0.53%, P : 0.015%, S: 0.003%, Als: 0.035%, Nb: 0.015%, and the balance is Fe and unavoidable impurities.

[0038] The production method of lightweight fatigue-resistant hot-rolled dual-phase wheel steel in this embodiment includes smelting, continuous casting, heating, rolling, cooling, and crimping processes, and the specific process steps are as follows:

[0039] (1) Continuous casting process: the pure molten steel obtained from smelting is continuously cast, and the continuous casting is controlled by constant casting speed, the casting speed is 1.0m / min, and the thickness of the slab is 230mm; : C: 0.06%, Si: 0.75%, Mn: 1.22%, Cr: 0.53%, P: 0.015%, S: 0.003%, Als: 0.035%, Nb: 0.015%, the balance is Fe and unavoidable impurities ;

[0040] (2) Heating p...

Embodiment 2

[0047] The thickness specification of the lightweight fatigue-resistant hot-rolled dual-phase wheel steel in this embodiment is 11.5mm, and its chemical composition and mass percentage are: C: 0.07%, Si: 0.71%, Mn: 1.25%, Cr: 0.55%, P: 0.014%, S: 0.002%, Als: 0.042%, Nb: 0.018%, and the balance is Fe and unavoidable impurities.

[0048] The production method of lightweight fatigue-resistant hot-rolled dual-phase wheel steel in this embodiment includes smelting, continuous casting, heating, rolling, cooling, and crimping processes, and the specific process steps are as follows:

[0049] (1) Continuous casting process: the pure molten steel obtained from smelting is continuously cast, and the continuous casting is controlled by constant casting speed, the casting speed is 1.0m / min, and the thickness of the slab is 236mm; the chemical composition and mass percentage of the slab are : C: 0.07%, Si: 0.71%, Mn: 1.25%, Cr: 0.55%, P: 0.014%, S: 0.002%, Als: 0.042%, Nb: 0.018%, the bal...

Embodiment 3

[0057] In this example, the lightweight fatigue-resistant hot-rolled dual-phase wheel steel has a thickness specification of 13mm, and its chemical composition and mass percentage are: C: 0.083%, Si: 0.73%, Mn: 1.24%, Cr: 0.54%, P : 0.011%, S: 0.004%, Als: 0.039%, Nb: 0.021%, and the balance is Fe and unavoidable impurities.

[0058] The production method of lightweight fatigue-resistant hot-rolled dual-phase wheel steel in this embodiment includes smelting, continuous casting, heating, rolling, cooling, and crimping processes, and the specific process steps are as follows:

[0059] (1) Continuous casting process: the pure molten steel obtained by smelting is continuously cast, and the continuous casting is controlled by constant casting speed, the casting speed is 1.05m / min, and the thickness of the slab is 235mm; : C: 0.083%, Si: 0.73%, Mn: 1.24%, Cr: 0.54%, P: 0.011%, S: 0.004%, Als: 0.039%, Nb: 0.021%, the balance is Fe and unavoidable impurities ;

[0060] (2) Heating p...

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Abstract

The invention discloses lightweight fatigue-resistant hot-rolled two-phase wheel steel and a production method thereof. The hot-rolled two-phase wheel steel is prepared from chemical components in percentage by mass as follows: 0.05%-0.09% of C, 0.5%-0.8% of Si, 1.0%-1.6% of Mn, 0.4%-0.7% of Cr, smaller than or equal to 0.015% of P, smaller than or equal to 0.005% of S, 0.015%-0.045% of Als, 0.01%-0.03% of Nb and the balance of Fe and inevitable impurities. The production method comprises smelting, continuous casting, heating, rolling, cooling and rolling procedures. On the basis of existing 2250 mm hot continuous rolling production and cooling equipment, the hot-rolled two-phase wheel steel with the thickness specification of 10-14 mm, the uniform grain size in the thickness direction, low yield ratio, high elongation and significant weight reduction and lightweight effects is developed, and various performance requirements of wheel production are completely met.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a lightweight fatigue-resistant hot-rolled dual-phase wheel steel and a production method thereof. Background technique [0002] With the gradual consumption of non-renewable energy and the strengthening of environmental awareness, the lightweight of automobiles has attracted more and more attention. The use of high-strength steel plates with good performance in automobiles is an effective means for reducing weight, saving energy and improving safety. The use of high-strength steel plates to replace traditional low-carbon steel plates is of great significance to improving the structural strength of automobiles, reducing vehicle weight, and reducing fuel consumption. Conventional low-alloy high-strength steel plates usually use solid solution strengthening, precipitation strengthening, etc. to achieve the required strength of the steel plate, but the plasticity of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/26C22C33/04C21D8/02
CPCC21D8/0247C21D2211/005C21D2211/008C22C33/04C22C38/02C22C38/04C22C38/06C22C38/26
Inventor 张志强贾改风张志鸿裴庆涛柳风林李娜李斌
Owner HANDAN IRON & STEEL GROUP
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