Method for detecting temperature of high-strength Cr-Mo steel double-side welding back gouging groove belt

A detection method and high-strength technology, applied in welding equipment, auxiliary welding equipment, welding/cutting auxiliary equipment, etc., can solve problems such as poor welding quality and poor magnetic particle detection effect, avoid adverse effects, facilitate fine processing, The effect of welding and root cleaning quality assurance
CN102756227BActive Publication Date: 2014-09-17SICHUAN KEXIN MECHANICAL & ELECTRICAL EQUIPCO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN KEXIN MECHANICAL & ELECTRICAL EQUIPCO
Publication Date
2014-09-17

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Abstract

The invention discloses a method for detecting the temperature of the root-clearing groove of high-strength Cr-Mo steel double-sided welding, which belongs to the technical field of welding and detection. The invention can judge whether the groove meets the requirements after root cleaning when the root cleaning temperature of Cr-Mo steel is greater than 200°C, and cleverly solves the problem of temperature drop detection in the existing technology, and the process improvement brought by it is effectively It solves the adverse effects of multiple temperature rises and falls on the welding quality during welding, improves the first pass rate of welding, and also solves the manufacturing problem of slow welding speed of high-strength Cr-Mo steel.
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Description

technical field

[0001] The invention belongs to the technical field of welding and detection, and relates to a method for detecting the temperature of a double-sided welded groove of high-strength steel, in particular to a detection method for the temperature of a double-sided welded groove of high-strength Cr-Mo steel. Background technique

[0002] Steel materials used for hydrogen-facing equipment in oil refining and chemical plants need to have excellent hydrogen corrosion resistance and good high-temperature strength. Therefore, thick Cr-Mo steel plates are often used for high-temperature and high-pressure vessel shells and heads. However, Cr-Mo steel (chrome-molybdenum steel) is a steel type with high strength, large hardening tendency, and easy to produce hydrogen-induced cracks (that is, commonly called delayed cracks).

[0003] The thick Cr-Mo steel plate needs to use double-sided welding to ensure full penetration. After welding on one side, the back root cleaning ...

Claims

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