A local post-weld heat treatment method for fillet joints of sockets

A technology for post-weld heat treatment and fillet joints, which is applied in heat treatment furnaces, heat treatment equipment, heat treatment process control, etc., and can solve problems such as material property damage and joint scrapping
CN104263894BInactive Publication Date: 2016-05-18SUZHOU NUCLEAR POWER RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU NUCLEAR POWER RES INST
Publication Date
2016-05-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a local postweld heat treatment method of a stub tube fillet joint. The method comprises the following steps of with fillet weld as the center, arranging a heater having power of Q1 on a barrel body and arranging a heater having powder of Q2 on a stub tube, wherein Q1 is calculated according to a preset postweld heat treatment process and a desired heating range and Q2 is calculated according to the formula A. The method can carry out quantitative heating power compensation on a side of the fillet joint having larger heat transfer capacity so that a highest-temperature point in the heating range is located on the fillet weld and thus the highest-temperature point in the heating range does not deviate from the fillet weld, the adverse influence produced by the traditional postweld heat treatment process on joint performances is avoided and postweld heat treatment requirements are satisfied.
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Description

technical field

[0001] The invention relates to a local post-weld heat treatment method for the fillet joint of the socket, which is especially suitable for the post-weld heat treatment of the fillet joint of the socket whose length is greater than or equal to 5 times the outer diameter of the socket, or the socket has been connected with an external pipeline Post-weld heat treatment of socket fillet joints. Background technique

[0002] Post-weld heat treatment is a kind of heat treatment to eliminate the residual stress of welded joints and improve the structure and performance of welded joints. The general process is: install thermocouples → arrange heating devices → wrap insulation cotton → set heat treatment parameters → perform heat treatment .

[0003] The fillet joint of the nozzle seat is one of the common forms of welded joints. During manufacture, the overall post-weld heat treatment is generally carried out with the pressure vessel or pipeline in the factory. T...

Claims

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