Method for online detecting thermal aging condition of duplex stainless steel and system thereof

Abstract

The invention relates to a method for online detecting the thermal aging condition of duplex stainless steel and a system thereof. The system comprises an input and output module and a computation module, wherein the computation module comprises three algorithm units of a relationship of the magnetic permeability and the thermal aging dynamics, a relationship of the thermal aging dynamics and the mechanical property and a relationship of the mechanical property and the thermal aging security coefficient. The method comprises the following steps: establishing the algorithm units of a duplex stainless steel material; reading the relative permeability parameters of a material to be detected, and obtaining the thermal aging security coefficient of the duplex stainless steel according to the algorithm units; and judging the security of the material according to the obtain thermal aging security coefficient. The system and the method can realize online detection to duplex stainless steel parts and increase the service security of the parts. Meanwhile, the system and the method are convenient to operate, save the time and the labor, and are beneficial to engineers and researchers to develop the service life evaluation of the duplex stainless steel parts on this basis.

Description

technical field

[0001] The invention belongs to the field of metal material detection, and in particular relates to a method and system for on-line detection of thermal aging conditions of duplex stainless steel. Background technique

[0002] Duplex stainless steel has a two-phase structure of austenite and ferrite, has high strength, good corrosion and crack resistance, and excellent welding performance, and is widely used in nuclear energy, petroleum, chemical and other industrial fields. However, when duplex stainless steel parts are used for a long time in the temperature range of 300-500 ℃, thermal aging will occur, which will lead to the deterioration of the mechanical properties of the material, which is manifested as: the impact toughness of the material is reduced, the corrosion resistance is deteriorated, and the fatigue life is shortened. This will not only shorten the service life of the components, but also increase the unsafety of the components or equipment. ...

Examples

Embodiment 1

[0042] In this embodiment, the thermal aging condition detection of a duplex stainless steel pipeline in service is carried out. Proceed as follows:

[0043] 1) Set up the following algorithm unit of the duplex stainless steel material: promptly utilize the system of the present invention:

[0044] 2) Read the relative magnetic permeability parameters of the material to be tested through the input module, read the relative magnetic permeability parameters of the material from the user, and provide them to the calculation module; the calculation module includes the parameters of magnetic permeability and thermal aging kinetics Relational algorithm unit, relationship algorithm unit between thermal aging kinetics and mechanical properties, relationship algorithm unit between mechanical properties and thermal aging safety factor, calculation module to calculate the relationship between magnetic permeability and thermal aging kinetics, thermal aging kinetics and mechanical properti...

Embodiment 2

[0050] In this embodiment, the thermal aging condition detection of a duplex stainless steel pump casing in service is carried out. Proceed as follows:

[0051] 1) Set up the following algorithm unit of the duplex stainless steel material: promptly utilize the system of the present invention:

[0052] 2) Read the relative magnetic permeability parameters of the material to be tested through the input module, read the relative magnetic permeability parameters of the material from the user, and provide them to the calculation module; the calculation module includes the parameters of magnetic permeability and thermal aging kinetics Relational algorithm unit, relationship algorithm unit between thermal aging kinetics and mechanical properties, relationship algorithm unit between mechanical properties and thermal aging safety factor, calculation module to calculate the relationship between magnetic permeability and thermal aging kinetics, thermal aging kinetics and mechanical prope...

Embodiment 3

[0057] In this embodiment, the thermal aging condition detection of a duplex stainless steel valve in service is carried out. Proceed as follows:

[0058] 1) Set up the following algorithm unit of the duplex stainless steel material: promptly utilize the system of the present invention:

[0059] 2) Read the relative magnetic permeability parameters of the material to be tested through the input module, read the relative magnetic permeability parameters of the material from the user, and provide them to the calculation module; the calculation module includes the parameters of magnetic permeability and thermal aging kinetics Relational algorithm unit, relationship algorithm unit between thermal aging kinetics and mechanical properties, relationship algorithm unit between mechanical properties and thermal aging safety factor, calculation module to calculate the relationship between magnetic permeability and thermal aging kinetics, thermal aging kinetics and mechanical properties ...

technical field

[0001] The invention belongs to the field of metal material detection, and in particular relates to a method and system for on-line detection of thermal aging conditions of duplex stainless steel. Background technique

[0002] Duplex stainless steel has a two-phase structure of austenite and ferrite, has high strength, good corrosion and crack resistance, and excellent welding performance, and is widely used in nuclear energy, petroleum, chemical and other industrial fields. However, when duplex stainless steel parts are used for a long time in the temperature range of 300-500 ℃, thermal aging will occur, which will lead to the deterioration of the mechanical properties of the material, which is manifested as: the impact toughness of the material is reduced, the corrosion resistance is deteriorated, and the fatigue life is shortened. This will not only shorten the service life of the components, but also increase the unsafety of the components or equipment. ...

Examples

Embodiment 1

[0042] In this embodiment, the thermal aging condition detection of a duplex stainless steel pipeline in service is carried out. Proceed as follows:

[0043] 1) Set up the following algorithm unit of the duplex stainless steel material: promptly utilize the system of the present invention:

[0044] 2) Read the relative magnetic permeability parameters of the material to be tested through the input module, read the relative magnetic permeability parameters of the material from the user, and provide them to the calculation module; the calculation module includes the parameters of magnetic permeability and thermal aging kinetics Relational algorithm unit, relationship algorithm unit between thermal aging kinetics and mechanical properties, relationship algorithm unit between mechanical properties and thermal aging safety factor, calculation module to calculate the relationship between magnetic permeability and thermal aging kinetics, thermal aging kinetics and mechanical properti...

Embodiment 2

[0050] In this embodiment, the thermal aging condition detection of a duplex stainless steel pump casing in service is carried out. Proceed as follows:

[0051] 1) Set up the following algorithm unit of the duplex stainless steel material: promptly utilize the system of the present invention:

[0052] 2) Read the relative magnetic permeability parameters of the material to be tested through the input module, read the relative magnetic permeability parameters of the material from the user, and provide them to the calculation module; the calculation module includes the parameters of magnetic permeability and thermal aging kinetics Relational algorithm unit, relationship algorithm unit between thermal aging kinetics and mechanical properties, relationship algorithm unit between mechanical properties and thermal aging safety factor, calculation module to calculate the relationship between magnetic permeability and thermal aging kinetics, thermal aging kinetics and mechanical prope...

Embodiment 3

[0057] In this embodiment, the thermal aging condition detection of a duplex stainless steel valve in service is carried out. Proceed as follows:

[0058] 1) Set up the following algorithm unit of the duplex stainless steel material: promptly utilize the system of the present invention:

[0059] 2) Read the relative magnetic permeability parameters of the material to be tested through the input module, read the relative magnetic permeability parameters of the material from the user, and provide them to the calculation module; the calculation module includes the parameters of magnetic permeability and thermal aging kinetics Relational algorithm unit, relationship algorithm unit between thermal aging kinetics and mechanical properties, relationship algorithm unit between mechanical properties and thermal aging safety factor, calculation module to calculate the relationship between magnetic permeability and thermal aging kinetics, thermal aging kinetics and mechanical properties ...

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