A method of processing embrittled high-chromium ferritic stainless steel plate

A high-chromium ferrite and stainless steel plate technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problem of high-chromium ferritic stainless steel plate plastic toughness not up to standard, and achieve the effect of restoring plastic toughness

Active Publication Date: 2022-07-26
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of high-efficiency and economical treatment of high-chromium ferritic stainless steel plates due to the precipitation of brittle phases, the present invention provides a method for treating brittle high-chromium ferritic stainless steel plates

Method used

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  • A method of processing embrittled high-chromium ferritic stainless steel plate
  • A method of processing embrittled high-chromium ferritic stainless steel plate
  • A method of processing embrittled high-chromium ferritic stainless steel plate

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Embodiment 1

[0017] Embodiment 1: a method for processing embrittled high-chromium ferritic stainless steel plate, wherein, when preparing high-chromium ferritic stainless steel plate, the weight percentage of each element of the smelting raw material is: 24.5% Cr, 4.5% Cr Mo, 3.8% Ni, 0.02% C, 0.005% N, 0.40% Nb, 0.02% Ti, 0.01% Al, 0.002% O, the rest are Fe and inevitable impurities, after embrittlement The thickness of the high-chromium ferritic stainless steel plate is 4.5mm. The embrittled high-chromium ferritic stainless steel plate is treated by heat treatment. The heat treatment steps are as follows:

[0018] 1) Heating of high chromium ferritic stainless steel plate

[0019] The embrittled high-chromium ferritic stainless steel plate is placed in a heating furnace and heated to 1050°C, and the heating rate is 40°C / min;

[0020] 2) Keep warm after heating

[0021] The holding time is 15min;

[0022] 3) Cool down after insulation

[0023] After the embrittlement of the high-chro...

Embodiment 2

[0027] Embodiment 2: a method for treating embrittled high-chromium ferritic stainless steel plate, wherein, when preparing high-chromium ferritic stainless steel plate, the weight percentage of each element in the smelting raw material is: 27.5% Cr, 3.5% Cr Mo, 3.1% Ni, 0.01% C, 0.008% N, 0.35% Nb, 0.017% Ti, 3.0% Al, 0.001% O, the rest are Fe and inevitable impurities, after embrittlement The thickness of the high-chromium ferritic stainless steel plate is 6.5mm. The embrittled high-chromium ferritic stainless steel plate is treated by heat treatment. The heat treatment steps are as follows:

[0028] 1) Heating of high chromium ferritic stainless steel plate

[0029] The embrittled high-chromium ferritic stainless steel plate is placed in a heating furnace and heated to 1100°C, and the heating rate is 90°C / min;

[0030] 2) Keep warm after heating

[0031] The holding time is 100min;

[0032] 3) Cool down after insulation

[0033] After the embrittlement of the high-chrom...

Embodiment 3

[0037] Embodiment 3: a method for processing embrittled high-chromium ferritic stainless steel plate, wherein, when preparing high-chromium ferritic stainless steel plate, the weight percentage of each element in the smelting raw material is: 29.7% Cr, 3.0% Cr Mo, 2.1% Ni, 0.01% C, 0.003% N, 0.53% Nb, 0.02% Ti, 0.1% Al, 0.003% O, the rest are Fe and inevitable impurities, after embrittlement The thickness of the high-chromium ferritic stainless steel plate is 0.5mm. The embrittled high-chromium ferritic stainless steel plate is treated by heat treatment. The heat treatment steps are as follows:

[0038] 1) High chromium ferritic stainless steel plate heating

[0039] The embrittled high-chromium ferritic stainless steel plate is placed in a heating furnace and heated to 1150°C, and the heating rate is 100°C / min;

[0040] 2) Keep warm after heating

[0041] The holding time is 5min;

[0042] 3) Cool down after insulation

[0043] After the embrittlement of the high-chromium...

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Abstract

The invention relates to a high-chromium ferritic stainless steel plate, in particular to an embrittled high-chromium ferritic stainless steel plate, and in particular to a method for processing the embrittled high-chromium ferritic stainless steel plate. In order to solve the problem that the plastic toughness of the high-chromium ferritic stainless steel plate is not up to standard caused by the precipitation of the brittle phase in an efficient and economical way, the present invention provides a method for treating the embrittled high-chromium ferritic stainless steel plate . The present invention obtains a high-chromium ferritic stainless steel plate with no brittle phase precipitation and no obvious coarsening of crystal grains by applying the heat treatment of rapid heating, short-term heat preservation and high-speed cooling to the embrittled high-chromium ferritic stainless steel plate , and then restore the plastic toughness of the ferritic stainless steel sheet after precipitation and embrittlement.

Description

technical field [0001] The invention relates to a high-chromium ferritic stainless steel plate, in particular to an embrittled high-chromium ferritic stainless steel plate, and in particular to a method for processing the embrittled high-chromium ferritic stainless steel plate. Background technique [0002] Super ferritic stainless steel is a resource-saving high-performance material that replaces precious metal materials such as titanium, super austenite, and copper alloys, and is widely used in corrosive environments such as oceans and strong acids. Super ferritic stainless steel is high-chromium ferritic stainless steel. Super ferritic stainless steel contains Cr and Mo elements that improve the corrosion resistance of ferritic stainless steel, and also adds a certain amount of Ni, Nb and other elements. Due to the compositional characteristics of high chromium ferritic stainless steel containing high Cr, Mo and Nb, it is easy to form σ (Fe-Cr-Mo), χ (Fe 36 Cr 12 Mo 10...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/48C22C38/50C22C38/06C21D6/00C21D9/00C21D1/18
CPCC22C38/44C22C38/48C22C38/50C22C38/06C21D6/004C21D9/0081C21D1/18C21D2211/005
Inventor 鲁辉虎杜凌云沈兴全周进节
Owner ZHONGBEI UNIV
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