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Critical solid solution and critical starting low-temperature multiple variable-temperature alternating aging heat treatment method

A technology of aging heat treatment and solution heat treatment, which is applied in the field of material heat treatment, can solve the problems of poor resistance to discoloration and corrosion, poor heating reliability of heat treatment equipment, poor quality stability, etc., to reduce residual cold and hot processing stress and deformation, reduce or inhibit Solid solution and aging weaken phase, improve the effect of surface anti-discoloration and corrosion resistance

Pending Publication Date: 2021-04-30
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 starting low-temperature multiple variable-temperature alternating aging heat treatment method
  • Critical solid solution and critical starting low-temperature multiple variable-temperature alternating aging heat treatment method
  • Critical solid solution and critical starting low-temperature multiple variable-temperature alternating aging heat treatment method

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Embodiment Construction

[0057] 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.

[0058] Such as figure 2 As shown, the embodiment of the present invention proposes a critical solid solution and critical starting low temperature multiple variable temperature alternating aging heat treatment method, including: step 21, critical solution heat treatment process; and step 22, critical starting low temperature multiple variable temperature Alternative aging heat treatment process.

[0059] The process of the method...

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Abstract

The invention provides a critical solid solution and critical starting low-temperature multiple variable-temperature alternating aging heat treatment method. The method involves a critical solid solution heat treatment process and a critical starting low-temperature multiple variable-temperature alternating aging heat treatment process. The scheme provided by the method has technical feasibility, process adaptability, quality reliability, economic rationality and use safety, and can effectively improve the advantages and avoid the disadvantages of the traditional mainstream heat treatment method of austenitic stainless steel; the special heat treatment technical problems of "one long, one high, four poor and five low", namely, poor quality stability, low qualified rate, low hardness, low mechanical property, poor consistency, poor discoloration and corrosion resistance, long heating time, low efficiency, poor heating reliability of heat treatment equipment, short service life of high-temperature components and high cost and the like of the existing austenitic stainless steel heat treatment can be fundamentally solved; and method is particularly suitable for the technical field of hot working engineering such as smelting, steel rolling, forging and heat treatment of the austenitic stainless steel involved in steel mills and manufacturers.

Description

technical field [0001] The invention relates to the technical field of material heat treatment, in particular to a critical solid solution and critical starting low temperature multiple temperature alternating aging heat treatment method. 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 extrem...

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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 李志广张建颖纪新春杨俊伟殷彬栋孔冰
Owner 山西柴油机工业有限责任公司
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