Production method of large-thickness S135 stainless steel plate

A production method, the technology of S135, applied in the field of metallurgy, can solve problems such as difficulties in cold forming, and achieve the effect of excellent internal quality, good quality and high production efficiency

Inactive Publication Date: 2019-01-04
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Large-thickness S135 stainless steel is very sensitive to stress during deformation, and cold forming is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The thickness of the S135 stainless steel plate in this example is 150mm, and its chemical composition and mass percentage are: C: 0.04%, P: 0.015%, S: 0.010%, Mn: 0.55%, Mo: 0.52%, Ni: 2.55% , Cr: 12%, the rest is Fe and unavoidable impurity elements.

[0021] The production method of the present embodiment S135 stainless steel plate comprises original steel billet preheating treatment, billet making, steel billet heating and steel billet rolling operation, and concrete process step is as follows:

[0022] (1) Preheating treatment of the original billet: preheating two billets of the same size and furnace number, the preheating temperature is 200°C, and the heating time is 2 hours;

[0023] (2) Blank making: add niobium foil and nickel foil between 2 blanks of the same size and furnace number, the thickness of the niobium foil is 0.05mm, and the niobium content is 90%, the thickness of the nickel foil is 0.10mm, and the blank is placed The position is: S135 blank - ni...

Embodiment 2

[0029] The thickness of the S135 stainless steel plate in this example is 170mm, and its chemical composition and mass percentage are: C: 0.002%, P: 0.012%, S: 0.008%, Mn: 0.65%, Mo: 0.72%, Ni: 3.25% , Cr: 12.7%, the rest is Fe and unavoidable impurity elements.

[0030] The production method of the present embodiment S135 stainless steel plate comprises original steel billet preheating treatment, billet making, steel billet heating and steel billet rolling operation, and concrete process step is as follows:

[0031] (1) Preheating treatment of the original billet: preheating two billets of the same size and furnace number, the preheating temperature is 250°C, and the heating time is 2.5h;

[0032] (2) Blank making: add niobium foil and nickel foil between 2 blanks of the same size and furnace number, the thickness of the niobium foil is 0.07mm, and the niobium content is 92%, the thickness of the nickel foil is 0.12mm, and the blank is placed The position is: S135 blank - ni...

Embodiment 3

[0038] The thickness of the S135 stainless steel plate in this example is 192mm, and its chemical composition and mass percentage are: C: 0.003%, P: 0.010%, S: 0.008%, Mn: 0.85%, Mo: 0.90%, Ni: 4.55% , Cr: 13.3%, the rest is Fe and unavoidable impurity elements.

[0039] The production method of the present embodiment S135 stainless steel plate comprises original steel billet preheating treatment, billet making, steel billet heating and steel billet rolling operation, and concrete process step is as follows:

[0040] (1) Preheating treatment of the original billet: preheating two billets of the same size and furnace number, the preheating temperature is 280°C, and the heating time is 2.5h;

[0041] (2) Blank making: add niobium foil and nickel foil between 2 blanks of the same size and furnace number, the thickness of the niobium foil is 0.08mm, and the niobium content is 94%, the thickness of the nickel foil is 0.14mm, and the blank is placed The position is: S135 blank - ni...

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Abstract

The invention discloses a production method of a large-thickness S135 stainless steel plate. The production method comprises the processes of original steel billet preheating treatment, billet making,steel billet heating and steel billet rolling. According to the production method of the large-thickness S135 stainless steel plate, through a reasonable vacuum composite welding billet-making technique, the billet making quality of a composite billet is guaranteed, and through a subsequent soaking heating technology and a high-reduction rolling technology, the excellent internal quality of the steel plate is guaranteed; and through a double-gun-type electronic beam welding technology, the good quality of an original composite billet of the S135 stainless steel plate is guaranteed, and the basic conditions are provided for subsequent heating and rolling production. The large-thickness S135 stainless steel plate with the maximum thickness being 200 mm and flaw detection conforming to JB / T4730-2005 III grade or above is produced through the production method, the Z-direction property meets the Z35 grade, and the advantages of large thickness, large piece weight, high production efficiency and low cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method of a large-thickness S135 stainless steel plate. Background technique [0002] Due to its good corrosion resistance and mechanical properties, martensitic stainless steel has been widely used in the preparation of high-temperature environment components of nuclear fission reactors, such as reactor internals, boron injection tanks, nuclear spent fuel storage and transportation devices, and nuclear fuel pools. However, with the construction and operation of various reactor-type nuclear power plants and the increase of containers, as well as the research on structure (wall thickness, etc.) and corrosion, the corrosion resistance and mechanical properties of the current general-purpose 304L austenitic stainless steel have been improved It cannot meet the actual needs, so it is urgent to further improve the corrosion resistance and mechanical propert...

Claims

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Application Information

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IPC IPC(8): B23P13/02
Inventor 李杰龙杰王青刘丹付冬阳付振坡袁平赵晓辉师帅
Owner WUYANG IRON & STEEL
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