Method and system for determining ductile-brittle transition temperature of Q460 power transmission tower material

A technology of ductile-brittle transition temperature and transmission tower, which is applied in the field of power transmission and transformation engineering, can solve the problems of large error in evaluation results, single consideration factors, and poor practicability, and achieve the effects of improving accuracy, simple principle, and strong applicability

Pending Publication Date: 2021-02-02
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Low temperature is an important reason for the reduction of the toughness of transmission tower materials. Under different low temperature environments, the toughness of transmission tower materials is different, and the existing methods for determining the ductile-brittle transition temperature of transmission tower materials consider a single factor, namely Using the data of the impact t

Method used

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  • Method and system for determining ductile-brittle transition temperature of Q460 power transmission tower material
  • Method and system for determining ductile-brittle transition temperature of Q460 power transmission tower material
  • Method and system for determining ductile-brittle transition temperature of Q460 power transmission tower material

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Embodiment 1

[0063] Such as figure 1 As shown, a method for determining the ductile-brittle transition temperature of a Q460 power transmission tower material provided by the invention includes:

[0064] Step S1, placing the prefabricated sample based on the Q460 transmission tower material in the test device;

[0065] Step S2, setting a plurality of test conditions in the test device, maintaining the set time length under each test condition, and performing a Charpy impact test and low-temperature cooling on the sample based on the test device to obtain multiple toughness Brittle transition temperature;

[0066] Step S3, processing multiple ductile-brittle transition temperatures to obtain the ductile-brittle transition temperature of the transmission tower material.

[0067] The technical solution provided by the invention includes a sample preparation method, a test temperature setting method, a heat preservation method, a test method, a data processing method, a method for determinin...

Embodiment 2

[0095] Based on the same inventive concept, an embodiment of the present invention also provides a system for determining the ductile-brittle transition temperature of a Q460 transmission tower material, including:

[0096] The preparation module is used to place the prefabricated samples based on the Q460 transmission tower material in the test device;

[0097] The test module is used to set multiple test conditions in the test device, maintain the set time length under each test condition, and perform Charpy impact tests and low-temperature cooling on the samples based on the test device to obtain multiple test conditions. a ductile-brittle transition temperature;

[0098] The processing module is used to process multiple ductile-brittle transition temperatures to obtain the ductile-brittle transition temperature of the transmission tower material.

[0099] In an embodiment, the test module includes:

[0100] The Charpy impact test unit is used to perform the Charpy impact...

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Abstract

The invention provides a method and a system for determining the ductile-brittle transition temperature of a Q460 power transmission tower material. The method comprises the steps: placing a sample which is manufactured in advance based on the Q460 power transmission tower material in a test device; setting a plurality of test working conditions in the test device, maintaining the set time lengthunder each test working condition, and performing Charpy impact test and low-temperature cooling on the sample based on the test device to obtain a plurality of ductile-brittle transition temperatures; and processing the plurality of ductile-brittle transition temperatures to obtain the ductile-brittle transition temperature of the tower material of the power transmission tower. The technical scheme provided by the invention is more objective, more reliable in test result and high in operability, is an engineering technology summary for accurately determining the ductile-brittle transition temperature of the tower material, and improves the precision of determining the ductile-brittle transition temperature of the tower material of the power transmission tower.

Description

technical field [0001] The invention relates to the field of power transmission and transformation engineering, in particular to a method and system for determining the ductile-brittle transition temperature of a Q460 power transmission tower material. Background technique [0002] Due to the serious uneven distribution of power plants and loads, the transmission lines supported by transmission towers become the transmission intermediary connecting power plants and loads. Some power transmission towers are located in areas with low temperatures, and low temperature will increase the brittleness of steel. This phenomenon is called It is called low-temperature cold brittleness, and the low-temperature environment has a great influence on the impact properties of steel. This low temperature leads to brittle fracture accidents in the transmission tower steel, causing serious damage. How to solve the problem of low-temperature toughness of the transmission tower steel structure ha...

Claims

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Application Information

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IPC IPC(8): G01N25/12G01N3/303
CPCG01N3/303G01N25/12
Inventor 黄耀王旭明韩军科朱彬荣苏志钢吴静邢海军刘亚多王波
Owner CHINA ELECTRIC POWER RES INST
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