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Technological method for improving corrosion resistance of ferritic stainless steel

A process method and stainless steel technology, which is applied in the field of ferritic stainless steel production and processing, can solve the problems of reducing the service life of ferritic stainless steel, and achieve the effects of eliminating intergranular corrosion, low processing cost, and improving sensitivity

Inactive Publication Date: 2017-02-22
江苏金坛绿能新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no patented technology for ferritic stainless steel intergranular corrosion resistance heat treatment, which will reduce the service life of ferritic stainless steel

Method used

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Embodiment Construction

[0015] Below by the description of embodiment, the specific embodiment of the present invention is described in further detail:

[0016] The present invention is a process for improving the corrosion resistance of ferritic stainless steel. The process steps of the process for improving the corrosion resistance of ferritic stainless steel are as follows: 1) placing ferritic stainless steel raw materials in heating equipment Heating; 2) Heating to the annealing temperature of 840°C-860°C; 3) Maintaining the annealing temperature for 20min-40min; 4) Taking out the ferritic stainless steel raw material and cooling it to form a finished ferritic stainless steel product. The ferritic stainless steel raw material can be treated through the above steps to change the intergranular corrosion performance of the ferritic stainless steel. When the ferritic stainless steel has not undergone the heat treatment of the above process steps, the Ra value (surface roughness ) is about 20%, indica...

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Abstract

The invention provides a technological method applied to the technical field of producing and processing ferritic stainless steel and used for improving corrosion resistance of the ferritic stainless steel. The technological method for improving the corrosion resistance of the ferritic stainless steel includes the steps of 1, heating raw materials of the ferritic stainless steel in heating equipment; 2, heating the raw materials to the annealing temperature of 800-900 DEG C; 3, maintaining the annealing temperature for 20-40 minutes; and 4, taking out the raw materials of the ferritic stainless steel for cooling the raw materials of the ferritic stainless steel and forming finished products of the ferritic stainless steel. According to the technological method for improving the corrosion resistance of the ferritic stainless steel, the steps are simple, there is no need to input excessive equipment and materials, the processing cost is low, the intercrystalline corrosion resistance of the ferritic stainless steel can be processed, intercrystalline corrosion of the ferritic stainless steel can be eliminated, the mechanical strength of the ferritic stainless steel can be improved, the problem that intercrystalline fracture occurs and the strength almost disappears completely when the ferritic stainless steel receives stress effect can be avoided, and therefore the performance of the ferritic stainless steel can be comprehensively and effectively improved, and the service life of the ferritic stainless steel can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of production and processing of ferritic stainless steel, and more specifically relates to a process for improving the corrosion resistance of ferritic stainless steel. Background technique [0002] Due to the lack of nickel resources in my country and the large fluctuations in the price of nickel resources in the world, this has greatly accelerated the development of ferritic stainless steel that does not contain nickel. Ferritic stainless steels are mainly used in two areas: automotive exhaust systems and washing machine drums. First of all, the automobile exhaust system has been used in high temperature and corrosive environments for a long time, and the selection of ferritic stainless steel can greatly prolong the life of automobile exhaust system components. Second, the drum of the washing machine has been used for a long time under the condition of adding detergent and humid environment. Under such co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C22C38/28C22C38/26
CPCC21D1/26C21D6/002C21D2211/005C22C38/26C22C38/28
Inventor 吴建中刘全彬朱琛琦任世界
Owner 江苏金坛绿能新能源科技有限公司