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Controlled rolling and controlled cooling production method for high-yield-ratio high-manganese high-aluminum non-magnetic steel plate

A high yield ratio, controlled rolling and controlled cooling technology, applied in the field of engineering materials, can solve the problems of poor surface quality and complicated process of high manganese and high aluminum non-magnetic steel, achieve shortened production process, simple process, reduce production and Effect of Metal Oxidation Loss

Active Publication Date: 2020-02-04
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of poor surface quality and complicated process in the preparation of high manganese and high aluminum non-magnetic steel by traditional technology in the prior art, the present invention provides a high yield ratio high manganese and high aluminum non-magnetic steel plate and its controlled rolling and controlled cooling production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A controlled-rolling and controlled-cooling production method of a high-yield-ratio high-manganese-aluminum non-magnetic steel plate with a thickness of 40 mm, the high-manganese high-aluminum non-magnetic steel is calculated by weight percentage: C= 0.157%, Si= 0.32%, Mn= 22.80 %, S= 0.001%, P= 0.022%, Als=1.53%, V= 0.08%, Cr=0.25%, Ni=0.18%, the balance is Fe and unavoidable impurities;

[0029] Heating process: select a slab produced by continuous casting process, adopt three-stage heating, preheating section 850±20℃, heating section 1040℃±20℃, heating section 2=1230±20℃, soaking section =1230±20°C, the total heating time is controlled between 270±10 minutes, fully heated before rolling to ensure that the carbonitrides are fully dissolved in the steel slab to prevent grain coarsening;

[0030] Rolling process: After the steel billet leaves the heating furnace, it adopts the first stage of high-pressure rolling, and cooperates with water to remove phosphorus for two p...

Embodiment 2

[0034] A controlled-rolling and controlled-cooling production method of a high-yield-ratio high-manganese-aluminum non-magnetic steel sheet with a thickness of 32mm, the high-manganese and high-aluminum non-magnetic steel is calculated by weight percentage: C= 0.157%, Si= 0.32%, Mn= 22.80 %, S= 0.001%, P= 0.022%, Als=1.53%, V= 0.08%, Cr=0.25%, Ni=0.18%, the balance is Fe and unavoidable impurities;

[0035] Heating process: select a slab produced by continuous casting process, adopt three-stage heating, preheating section 850±20℃, heating section 1040℃±20℃, heating section 2=1230±20℃, soaking section =1230±20°C, the total heating time is controlled between 260±10 minutes, fully heated before rolling to ensure that the carbonitrides are fully dissolved in the steel slab to prevent grain coarsening;

[0036] Rolling process: After the steel billet leaves the heating furnace, it adopts the first stage of high-pressure rolling, and cooperates with water to remove phosphorus for tw...

Embodiment 3

[0040] A controlled-rolling and controlled-cooling production method of a high-yield ratio high-manganese and high-aluminum non-magnetic steel plate with a thickness of 20mm, the high-manganese and high-aluminum non-magnetic steel is calculated by weight percentage: C=0.163%, Si=0.28%, Mn=22.90 %, S= 0.001%, P= 0.023%, Als=1.80%, V=0.08%, the balance is Fe and unavoidable impurities.

[0041]Heating process: select a slab produced by continuous casting process, adopt three-stage heating, preheating section 850±20℃, heating section 1040℃±20℃, heating section 2=1230±20℃, soaking section =1230±20°C, the total heating time is controlled between 260±10 minutes, fully heated before rolling to ensure that the carbonitrides are fully dissolved in the steel slab to prevent grain coarsening;

[0042] Rolling process: After the steel billet leaves the heating furnace, it adopts the first stage of high-pressure rolling, and cooperates with water to remove phosphorus for two passes, which ...

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Abstract

The invention discloses a controlled rolling and controlled cooling production method for a high-yield-ratio high-manganese high-aluminum non-magnetic steel plate. The high-yield-ratio high-manganesehigh-aluminum non-magnetic steel plate comprises, by weight, 0.14-0.20% of C, less than or equal to 0.50% of Si, 21.50-25.50% of Mn, less than or equal to 0.030% of S, less than or equal to 0.030% ofP, 1.50-2.50% of Als, 0.04-0.10% of V, less than or equal to 1.0% of Cr and Ni, and the balance Fe and unavoidable impurities. According to the method, the controlled rolling and controlled cooling technology replaces a conventional hot rolling, quenching and tempering heat-treatment process, strength-toughness matching and magnetic conductivity are both qualified, and a higher yield ratio is achieved compared to the conventional process. After process optimization, the surface quality is better than that of the conventional heat-treatment process, the production cost is effectively reduced, the production process flow is effectively reduced, the production capacity of roll lines is released, significant economic benefits are achieved, and the method has a popularization value.

Description

technical field [0001] The invention belongs to the technical field of engineering materials, and in particular relates to a high-yield ratio high-manganese-high-aluminum non-magnetic steel and a controlled-rolling-controlled-cooling production method thereof. Background technique [0002] High manganese and high aluminum non-magnetic steel has the advantages of good mechanical properties, non-magnetic properties, low temperature resistance and low cost, and has more cost advantages, about one-third of the cost of austenitic stainless steel, and is widely used in the manufacture of oil recovery and refining equipment And pipelines, electric power, ships, offshore platforms, low temperature hydrogen and wear-resistant machinery and other fields. [0003] High manganese steel is generally produced by the traditional casting process: the first process, casting molded parts - heating to above the solid solution temperature and holding for a period of time, then water toughening ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/58C22C38/06C22C38/46C21D8/12
CPCC21D8/1222C22C38/002C22C38/02C22C38/06C22C38/46C22C38/58
Inventor 杨新龙刘国良郭营利姜军李金泽董建军陈开锋李晓燕
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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