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Automatic welding technology for butt joint of low alloy steel and nickel base alloy dissimilar steel heat-exchange tubes

A welding process and automatic welding technology, which is applied in welding equipment, metal processing, metal processing equipment, etc., can solve the problems of difficult welding, etc., and achieve the effect of uniform and beautiful weld formation, high welding efficiency and high welding quality

Active Publication Date: 2017-08-18
HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The welding process not only needs to ensure that the butt welds of the heat exchange tubes are well fused, but also control the two sides of the welds not to be sunken, and at the same time not exceed the surface of the heat exchange tubes by 0.45mm, and ensure that the φ of the ball is not less than 12.1mm. Tubes are extremely difficult to weld

Method used

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  • Automatic welding technology for butt joint of low alloy steel and nickel base alloy dissimilar steel heat-exchange tubes
  • Automatic welding technology for butt joint of low alloy steel and nickel base alloy dissimilar steel heat-exchange tubes
  • Automatic welding technology for butt joint of low alloy steel and nickel base alloy dissimilar steel heat-exchange tubes

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Embodiment

[0085] According to the above-mentioned welding process provided by the present invention, the medium and low alloy steel SA-213T22 heat exchange tube of the high temperature gas-cooled reactor steam generator is welded with the nickel-based alloy Incoloy800H heat exchange tube. The specifications of the two heat exchange tubes are both Φ19×3mm, and the heat exchange The minimum pipe wall spacing is 41mm, and the filling material is IN 82 melting ring, as follows:

[0086] Step 1), before welding, polish the parts to be welded on the low alloy steel SA-213T22 heat exchange tube and nickel-based alloy Incoloy800H heat exchange tube end and IN82 melting ring until metallic luster is seen, and dip acetone with white non-woven cloth Wipe until the non-woven fabric does not change color;

[0087] Step 2), install a pressure plate of the heat exchange tube welding tool 7 on the end of any heat exchange tube, adjust the relative position of the tool 7 and the tube end; The position ...

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Abstract

The invention discloses an automatic welding technology for butt joint of low alloy steel and nickel base alloy dissimilar steel heat-exchange tubes. The automatic welding technology comprises the following steps that a heat-exchange tube I (1), a heat-exchange tube II (3), and a melting ring (2) are cleaned; the heat-exchange tube I (1), the heat-exchange tube II (3), and the melting ring (2) are assembled; welding equipment is installed and debugged; and parameters of the welding technology are set, and welding treatment is started. The automatic welding technology for butting joint of low alloy steel and nickel base alloy dissimilar steel heat-exchange tubes combines special heat-exchange tube specifications and special welding technology parameters and choose of tungsten electrode, and is applied to butt welding between heat-exchange tubes of small diameters and big thick walls, the welding process is stable and reliable, formation of a welding joint is even and artistic, the welding joint is well fused, the welding efficiency is high, all destructive tests and physical and chemical performance tests are conducted, and the result meets the requirement for welding quality of the dissimilar steel heat-exchange tubes in a high temperature gas cooled reactor steam generator.

Description

technical field [0001] The invention relates to an automatic butt joint welding process of dissimilar steel heat exchange tubes for heat exchanger pressure vessel equipment, in particular to a nuclear power heat exchange main equipment, especially the first high temperature gas-cooled reactor, fast neutron reactor, etc. Automatic butt welding process of low-alloy steel and nickel-based alloy dissimilar steel heat exchange tubes for steam generators of fourth-generation nuclear power technology. Background technique [0002] The high temperature gas-cooled reactor steam generator independently designed by my country has a different structure of heat exchange tubes from the previous pressurized water reactor and boiling water reactor. The main heat exchange tube of the high temperature gas-cooled reactor steam generator is in the form of a spiral coil, which is divided into low-alloy steel heat exchange tubes in the low-temperature section of the spiral coil tube and nickel-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/167B23K9/235
CPCB23K9/02B23K9/167B23K9/235B23K2101/06B23K2103/18
Inventor 谢彦武郑明涛王莉伦辛杰邹迪婧杨云丽张海梅兖文涛孙佳超刘晶
Owner HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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