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Machining method of super-austenite stainless steel plate coil

A technology of austenitic stainless steel and processing method, which is applied in the field of metal pressure processing, can solve the problems of poor hot working performance, limited wide application and narrow hot working range, etc., and achieves the effect of improving the quality of the plate surface and the yield.

Inactive Publication Date: 2017-12-01
ZHENSHI GROUP EASTERN SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of steel has excellent performance, compared with the conventional product 18-8 stainless steel, the thermal processing performance is very poor, and the thermal processing range is narrow. If the thermal processing parameters are not selected properly, edge cracks and surface cracks will easily occur during the production Cracks have seriously affected the quality of its board surface and yield, limiting its wide application

Method used

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  • Machining method of super-austenite stainless steel plate coil
  • Machining method of super-austenite stainless steel plate coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The super austenitic stainless steel coils used in this example are composed by mass: C: 0.018%; Si: 0.45%; Mn: 1.35%; P: 0.025%; S: 0.0018%; N: 0.085%; Cr: 20.9 %; Cu: 1.35%; Mo: 4.23%; Ni: 24.5%; the balance is iron.

[0027] The rolling process route of the super austenitic stainless steel coil with a thickness of 5.85mm is grinding cast slab→heating→high pressure water dephosphorization→rough rolling→finish rolling→cooling→coiling→solid solution pickling.

[0028] (1) Grind the 180mm-thick billet through 26-mesh and 32-mesh grinding wheels respectively;

[0029] (2) After the slab is ground, it enters the heating furnace. It is heated in the preheating section for 56 minutes, heated to 1250°C in the soaking section, and the holding time in the soaking section is 60 minutes. The temperature of the upper surface of the slab is 10°C lower than that of the lower surface;

[0030] (3) After the cast slab is released from the furnace, it is dephosphorized by high-pressur...

Embodiment 2

[0036] The super austenitic stainless steel plate used in this example is composed by mass: C: 0.019%; Si: 0.48%; Mn: 1.45%; P: 0.029%; S: 0.0015%; N: 0.065%; Cr: 21.1% ; Cu: 1.36%; Mo: 4.25%; Ni: 24.3%; the balance is Fe.

[0037] The rolling process route of the super austenitic stainless steel coil with a thickness of 12mm is grinding cast slab→heating→high pressure water dephosphorization→rough rolling→finish rolling→cooling→coiling→solid solution pickling.

[0038] (1) Grind the 200mm-thick billet through 26-mesh and 32-mesh grinding wheels respectively;

[0039] (2) After the slab is ground, it enters the heating furnace. The heating time in the preheating section is 52 minutes, the soaking section is heated to 1220°C, and the soaking section is kept warm for 54 minutes. The temperature of the upper surface of the slab is 11°C lower than that of the lower surface;

[0040](3) After the cast slab is released from the furnace, it is dephosphorized by high-pressure water. ...

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Abstract

A method for processing super austenitic stainless steel coils. The mass composition of super austenitic stainless steel coils is as follows: C: ≤0.020%, Si: ≤1.00%, Mn: ≤2.00%, P: ≤0.045%, S: ≤0.035%, N: ≤0.1%, Cr: 19.0~23.0%, Cu: 1.2‑2.0%, Mo: 4.0~5.0%, Ni: 23.0~28.0%, and the balance is Fe; the process flow of this processing method is: Heating → high-pressure water dephosphorization → rough rolling → finish rolling → laminar cooling → coiling; the thermal processing method of the present invention, by controlling the heating temperature, rolling temperature, rolling pass and rolling pressure rate of the slab, can Super austenitic stainless steel hot-rolled coils without edge cracks and surface cracks are produced, and the surface quality and yield of the plates are improved.

Description

technical field [0001] The invention relates to a processing method for a super austenitic stainless steel coil, belonging to the technical field of metal pressure processing. Background technique [0002] In the prior art, a super austenitic stainless steel coil with high content of nickel, chromium, molybdenum and copper, its stainless steel components are as follows according to the mass composition requirements: C: ≤0.020%, Si: ≤1.00%, Mn: ≤2.00 %, P: ≤0.045%, S: ≤0.035%, N: ≤0.1%, Cr: 19.0~23.0%, Cu: 1.2-2.0%, Mo: 4.0~5.0%, Ni: 23.0~28.0%, balance It is Fe; the super austenitic stainless steel has high content of nickel, chromium, molybdenum and copper, and has good corrosion resistance and pitting resistance. Although this type of steel has excellent performance, compared with the conventional product 18-8 stainless steel, the thermal processing performance is very poor, and the thermal processing range is narrow. If the thermal processing parameters are not selected ...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/42C22C38/44C22C38/02C22C38/04C21D8/02B21B37/00B21B37/74B21B37/46
CPCC22C38/58B21B37/00B21B37/46B21B37/74B21B2201/02B21B2201/06B21B2261/20B21B2265/12C21D8/0226C22C38/001C22C38/004C22C38/02C22C38/04C22C38/42C22C38/44
Inventor 杨振颜海涛申鹏杨赛朱叶伟
Owner ZHENSHI GROUP EASTERN SPECIAL STEEL
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