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Production method of tempering high-strength steel suitable for directly installing and heating pressure container

A technology of heating pressure and production method, which is applied in the field of iron and steel smelting, can solve the problems of reducing effect, uneven performance, large component segregation, etc., and achieve the effect of avoiding invalid light reduction, good internal quality, and reducing segregation

Inactive Publication Date: 2018-11-09
中普(邯郸)钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heating time is shortened after the high-temperature continuous casting slab is directly loaded, and the temperature can meet the rolling requirements. However, due to the large component segregation, the performance is uneven, so it takes a long time to soak to complete the component diffusion, which reduces the energy saving of direct loading heating rolling. Effect

Method used

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  • Production method of tempering high-strength steel suitable for directly installing and heating pressure container
  • Production method of tempering high-strength steel suitable for directly installing and heating pressure container
  • Production method of tempering high-strength steel suitable for directly installing and heating pressure container

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: be applicable to the production method (260mm * 2250mm section) of quenched and tempered high-strength steel 07MnMoVR slab that is suitable for direct packing heating pressure vessel, as figure 2 shown.

[0037] The liquidus line of molten steel is 1519°C, and the composition mass percentage of steel is:

[0038] Table 1 07MnMoVR component control performance

[0039]

[0040](1) Continuous casting long nozzle argon 24L, submerged nozzle and upper nozzle argon 4L;

[0041] (2) The nozzle insertion depth is 154mm;

[0042] (3) Reverse taper 1.05%;

[0043] (4) Secondary cooling secondary water meter X PY-MEDC-260, roll gap mode PY-MEDC-260, amplitude 5.5mm, vibration frequency 152HZ;

[0044] (5) Dynamic reduction setting: the reduction amount of the 6th stage is 4.0mm; the reduction amount of the 7th and 8th stages is 2.5 and 2.0mm respectively; The diameter of the middle roller sleeve of the section guide roller is 2.0mm larger than the diameter ...

Embodiment 2

[0048] Embodiment 2: be applicable to the production method (260mm * 1500mm cross-section) of quenched and tempered high-strength steel 07MnNiMoDR ​​slab that is suitable for direct packing heating pressure vessel, as image 3 shown.

[0049] The liquidus line of molten steel is 1519°C, and the composition mass percentage of steel is:

[0050] Table 2 07MnNiMoDR ​​component control performance

[0051]

[0052] (1) Continuous casting long nozzle argon 26L; submerged nozzle and upper nozzle argon 3L.

[0053] (2) The nozzle insertion depth is 144mm.

[0054] (3) Inverted taper 1.05%.

[0055] (4) Secondary cooling and secondary water meter PY-MEDC-260, roll gap mode PY-MEDC-260, amplitude 5.5mm, vibration frequency 152HZ;

[0056] (5) Reduction setting: the reduction amount of the 6th stage is 4.0mm; the 7th, 8th, and 9th stages are set as large reductions, and the reductions are 2.5 and 2.0mm respectively; the 9th, 10th, and 11th stages are set as light reductions , Th...

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Abstract

The invention discloses a production method of tempering high-strength steel suitable for directly installing and heating a pressure container. According to the method, the steel for the high-qualitypressure container (07MnMoVR, 07MnNiVDR and 07MnNiMoDR) is produced by front-end large pressing on an existing continuous casting machine by adopting casting blank tissue regulation and control technology, solidification tail end position indetermination soft pressing down technology and hot roll gap reconstructing technology, and after the slab is subjected to continuous casting, the slab is directly put in a furnace for hot rolling, the uniform component segregation of the slab can be reduced, the time of the slab in the uniform component of the furnace can be reduced, the heating time of the slab is shortened, and the requirement for direct loading and heating of the slab is met; the equiaxial crystal zone of the plate is reduced, so that the agglomeration and segregation of inclusionsand components at the position of one-half thickness are reduced, and the performance of the produced steel plate is uniform.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a production method suitable for quenched and tempered high-strength steel slabs for direct loading and heating pressure vessels. Background technique [0002] Continuous casting is an important process in the production of medium and thick steel plates. The surface quality of the continuous casting slab has been greatly improved, and the surface quality can basically meet the production requirements, but the internal quality of the continuous casting slab still needs to be further improved. The internal quality of the continuous casting slab is the prerequisite for the production of high-quality medium-thick steel plates . Continuous casting slabs inevitably have composition segregation in the thickness direction, and a large number of low-melting inclusions and composition segregation during solidification condense at 1 / 2 of the thickness, and at the same time ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/12
CPCB22D11/16B22D11/1206
Inventor 郭龙鑫郭恩元杨云清石跃强郭延生石现英关秀格陈科晓庞洪轩
Owner 中普(邯郸)钢铁有限公司
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