Microalloyed high-aluminum high-ductility steel plate and manufacturing method thereof

A micro-alloying and high plasticity technology, applied in the field of alloy steel, can solve the problems of low tensile strength, unsatisfactory, and not very excellent comprehensive mechanical properties, and achieves low equipment requirements, improved comprehensive mechanical properties, and obvious weight reduction effect. Effect

Inactive Publication Date: 2017-02-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The elongation rate of this kind of steel after fracture is good, reaching about 45%, but its tensile strength is a bit low, and its comprehens...

Method used

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  • Microalloyed high-aluminum high-ductility steel plate and manufacturing method thereof
  • Microalloyed high-aluminum high-ductility steel plate and manufacturing method thereof
  • Microalloyed high-aluminum high-ductility steel plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The chemical composition and mass percentage of the micro-alloyed high-aluminum high-plasticity steel plate described in this example are: C: 0.88%, Mn: 28.8%, Al: 8.5%, Nb: 0.045%, V: 0.05%, Ti: 0.05% , N: 0.06%, P<0.003%, S<0.003%, the balance is Fe and unavoidable impurities.

[0032] The preparation method of the micro-alloyed high-aluminum high-plasticity steel plate described in this embodiment specifically includes the following steps:

[0033] (1) Forging into slabs after smelting and casting: melt the prepared raw materials in a vacuum induction melting furnace at a smelting temperature of 1650°C, and pour them into ingots, forge and deform the ingots, and finally forge them into slabs. The cumulative deformation is 70%, and after forging, it is air-cooled to room temperature. The ingot heating temperature is 1180°C, the holding time is 1.5h, the starting forging temperature is 1150°C, and the final forging temperature is 850°C.

[0034] (2) Hot rolling: heat ...

Embodiment 2

[0040]The chemical composition and mass percentage of the microalloyed high aluminum high plasticity steel plate described in this example are: C: 0.8%, Mn: 30%, Al: 9%, Nb: 0.02%, V: 0.10%, Ti: 0.10% , N: 0.02%, P<0.003%, S<0.003%, the balance is Fe and unavoidable impurities.

[0041] The preparation method of the micro-alloyed high-aluminum high-plasticity steel plate described in this embodiment specifically includes the following steps:

[0042] (1) Forging into slabs after smelting and casting: melt the prepared raw materials in a vacuum induction melting furnace at a smelting temperature of 1650°C, and pour them into ingots, forge and deform the ingots, and finally forge them into slabs. The accumulative deformation is 75%, air-cooled to room temperature after forging, in which the heating temperature of the ingot is 1200°C, the holding time is 2h, the starting forging temperature is 1100°C, and the final forging temperature is 800~900°C.

[0043] (2) Hot rolling: heat...

Embodiment 3

[0048] The chemical composition and mass percentage of the micro-alloyed high-alumina high-plasticity steel plate described in this example are: C: 1.0%, Mn: 28%, Al: 10%, Nb: 0.10%, V: 0.02%, Ti: 0.02% , N: 0.08%, P<0.003%, S<0.003%, the balance is Fe and unavoidable impurities.

[0049] The preparation method of the micro-alloyed high-aluminum high-plasticity steel plate described in this embodiment specifically includes the following steps:

[0050] (1) Forging into slabs after smelting and casting: melt the prepared raw materials in a vacuum induction melting furnace at a smelting temperature of 1650°C, and pour them into ingots, forge and deform the ingots, and finally forge them into slabs. The cumulative deformation is 80%, and after forging, it is air-cooled to room temperature. The heating temperature of the ingot is 1170°C, the holding time is 1h, the starting forging temperature is 1200°C, and the final forging temperature is 800°C.

[0051] (2) Hot rolling: heat t...

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Abstract

The invention relates to a microalloyed high-aluminum high-ductility steel plate and a manufacturing method thereof, and belongs to the field of alloy steel. The steel plate comprises the chemical components, by mass, including 0.8%-1.0% of C, 28%-30% of Mn, 8.0%-10% of Al, 0.02%-0.10% of Nb, 0.02%-0.10% of V, 0.02%-0.10% of Ti, 0.02%-0.08% of N, 0-0.003% of P, 0-0.003% of S and the balance Fe and inevitable impurities. The manufacturing method comprises the steps that firstly, raw materials are prepared according to the chemical components, then a plate billet is forged after smelting and casting, the plate billet is heated, homogenized and subjected to multi-pass hot rolling deformation with the accumulative deformation rate being 85%-90%, water cooling after rolling is conducted, and then the plate billet is air-cooled to the room temperature; secondly, the hot-rolled steel plate is subjected to solution treatment, fast heated to a solution treatment temperature for heat preservation for a period of time, and then water-quenched to the room temperature; thirdly, the steel plate subjected to the solution treatment is pickled, cold-rolled and subjected to multi-pass rolling deformation with the accumulative compression amount being 65%-80%; and fourthly, the cold-rolled steel plate is subjected to final annealing treatment, and then water-quenched to the room temperature, so that the microalloyed high-aluminum high-ductility steel plate is obtained. According to the steel plate manufactured through the manufacturing method, the strength and ductility product can reach 50 GPa*%, and the impact and collision resistance of the material is obviously improved.

Description

technical field [0001] The invention belongs to the field of alloy steel, in particular to a micro-alloyed high-aluminum high-plasticity steel plate and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry and the continuous improvement of human awareness of environmental protection and energy conservation, metal materials for automobiles are developing towards the two main goals of energy conservation and safety. For this reason, on the one hand, the specific strength of metal materials should be improved to reduce the weight of the vehicle body and fuel consumption, which is conducive to saving energy and reducing environmental pressure; on the other hand, the collision absorption capacity of metal materials should be improved to convert most of the collision energy into The plastic deformation of the material of the reasonable part of the body ensures the safety of the driver. [0003] Chinese invention patent ...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/06C22C38/12C22C38/14C21D8/02C21D1/26C21D1/18
CPCC22C38/04C21D1/18C21D1/26C21D8/0226C21D8/0236C21D8/0273C22C38/001C22C38/06C22C38/12C22C38/14
Inventor 蒋业华罗翔冯晶种晓宇刘亚会
Owner KUNMING UNIV OF SCI & TECH
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