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Critical solid solution and critical cooling and heating aging and annealing heat treatment method

An annealing heat treatment and aging heat treatment technology, applied in the field of material heat treatment, can solve the problems of poor discoloration and corrosion resistance, poor heating reliability of heat treatment equipment, poor quality stability, etc. The effect of dissolving and aging weakening phase and improving the ability of the surface to resist discoloration and rust

Pending Publication Date: 2021-04-23
山西柴油机工业有限责任公司
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Problems solved by technology

Solve the existing austenitic stainless steel heat treatment problems of poor quality stability, low qualified product rate, low hardness, low mechanical properties and poor consistency, poor resistance to discoloration and corrosion, long heating time, low efficiency, poor heating reliability of heat treatment equipment and high temperature elements The unique heat treatment technical problems of "one long, one high, four different and five low" such as low device service life and high cost

Method used

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  • Critical solid solution and critical cooling and heating aging and annealing heat treatment method
  • Critical solid solution and critical cooling and heating aging and annealing heat treatment method
  • Critical solid solution and critical cooling and heating aging and annealing heat treatment method

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Embodiment Construction

[0052] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0053] like figure 2 As shown, the embodiment of the present invention proposes a critical solution and critical cooling and heating aging and annealing heat treatment method, including: step 21, critical solution heat treatment process; and step 22, critical cooling and heating aging and annealing heat treatment process.

[0054] The process of the method is as follows: firstly carry out the first part of critical solution heat t...

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Abstract

The invention provides a critical solid solution and critical cooling and heating aging and annealing heat treatment method. The method comprises a critical solid solution heat treatment process and a critical cooling and heating aging and annealing heat treatment process. The scheme has technical feasibility, process adaptability, quality reliability, economic rationality and use safety, and can effectively enhance the advantages and avoid the disadvantages of a traditional mainstream heat treatment method of austenitic stainless steel; the problems that existing austenitic stainless steel heat treatment is poor in quality stability, low in qualified product rate, low in hardness, low in mechanical property, poor in consistency, poor in discoloration and corrosion resistance, long in heating time, low in efficiency, heat treatment equipment is poor in heating reliability, high-temperature components are short in service life, the cost is high, and other special heat treatment technology problems are fundamentally solved. The method is particularly suitable for the technical field of hot working engineering such as smelting, steel rolling, forging and heat treatment related to the austenitic stainless steel in steel mills and manufacturers.

Description

technical field [0001] The invention relates to the technical field of material heat treatment, in particular to a heat treatment method for critical solid solution, critical temperature drop, temperature rise, aging and annealing. Background technique [0002] The heat treatment principles of austenitic stainless steel and alloy structural steel are completely different: alloy structural steel can undergo high-temperature austenite transformation under high temperature conditions (good heat treatment process), therefore, alloy structural steel is very easy to pass through quenching and tempering heat treatment methods The hardness (or mechanical properties) is greatly improved; while austenitic stainless steel cannot undergo high-temperature austenite transformation under high temperature conditions (only limited dissolution and precipitation of alloy element strengthening phases, poor heat treatment processability), therefore, austenitic stainless steel It is extremely dif...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/78C21D6/00
CPCC21D1/78C21D6/00C21D2211/001
Inventor 李志广王东军孔冰郝忠杨姝青杨文影
Owner 山西柴油机工业有限责任公司
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