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TIG welding method for low-activation martensitic steel

A technology of martensitic steel and welding methods, applied in welding equipment, welding accessories, arc welding equipment, etc., can solve the problems of easy generation of pores and microcracks, poor weldability, etc., and achieve smooth and beautiful macroscopic appearance and good shape , the effect of high arc column temperature

Active Publication Date: 2020-12-18
SOUTHWESTERN INST OF PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the poor weldability of low-activation martensitic CLF-1 steel, easy to produce pores and microcracks, etc., the invention provides a TIG welding method for low-activation martensitic steel, which is applied to low-activation martensitic steel. In the welding of CLF-1 steel, and by controlling the corresponding process parameters of welding and heat treatment, the welded joints of low-activation martensitic CLF-1 steel are smooth and beautiful, without cracks and pores, and the performance of welded joints is guaranteed to be good.

Method used

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  • TIG welding method for low-activation martensitic steel

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Experimental program
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Embodiment 1

[0031] Such as Figure 1-Figure 5 As shown, this embodiment takes the low-activation martensitic CLF-1 steel welding test plate 1 of 2mm*200mm*500mm as an example for illustration: first, the low-activation martensitic CLF-1 steel forged rod is drawn into a diameter of Welding wire of 1.6mm; then machine the welding test plate 1 with a unilateral V-shaped groove β of 15° and blunt edge thickness c1mm; after the processing is completed, conduct UT (Ultrasonic Test) flaw detection on the welding test plate 1 , carry out PT (penetration testing, penetration testing) flaw detection on the groove surface. When the test plate and the groove surface are qualified, use acetone to clean the groove and the surrounding 1 times the thickness position and the surface of the welding wire. Oxide film to maintain metallic luster; after cleaning, according to the pre-set 1mm assembly gap e, perform spot welding assembly on welding test plate 1 and argon protection and anti-deformation tooling ...

Embodiment 2

[0034] Such as Figure 1-Figure 5As shown, this embodiment takes the low-activation martensitic CLF-1 steel welding test plate 1 of 10mm*200mm*500mm as an example for illustration: first, the low-activation martensitic CLF-1 steel forged rod is drawn into a diameter of Welding wire of 2.0 mm; then machine the welding test plate 1 with a unilateral V-shaped groove β of 15° and blunt edge thickness c1 mm; after the processing is completed, conduct UT (Ultrasonic Test) flaw detection on the welding test plate 1 , carry out PT (penetration testing, penetration testing) flaw detection on the groove surface. When the test plate and the groove surface are qualified, use acetone to clean the groove and the surrounding 1 times the thickness position and the surface of the welding wire. Oxide film to maintain metallic luster; after cleaning, according to the pre-set 2mm assembly gap e, perform spot welding assembly on welding test plate 1 and argon protection and anti-deformation toolin...

Embodiment 3

[0037] Such as Figure 1-Figure 5 As shown, this embodiment takes the low-activation martensitic CLF-1 steel welding test plate 1 of 20mm*200mm*500mm as an example for illustration: first, the low-activation martensitic CLF-1 steel forged rod is drawn into a diameter of Welding wire of Ф2.4mm; then, machine the welding test plate 1 with a unilateral V-groove β of 30° and blunt edge thickness c2mm; after the processing is completed, perform UT (Ultrasonic Test) on the welding test plate 1 Flaw detection: PT (penetration testing, penetration testing) flaw detection is carried out on the groove surface. When the test plate and the groove surface are qualified, use acetone to clean the groove and the surrounding 1 times the thickness and the oil stains and iron chips on the surface of the welding wire. and oxide film to keep the metallic luster; after the cleaning is completed, perform spot welding assembly on the welding test plate 1 and the argon protection and anti-deformation ...

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Abstract

The invention discloses a TIG welding method for low-activation martensitic steel. According to the method, a welding wire made of low-activation martensitic steel base metal is used, so that the welding wire and a welding test plate are made of the same material, and the welding matching performance is improved; the diameter of the welding wire is set to be phi 1.6-2.4mm, and the welding test plate is subjected to single-face welding and double-face forming through a TIG welding process; and by controlling process parameters corresponding to welding and heat treatment, a welding joint of thelow-activation martensitic steel is flat, attractive and free of cracks and air holes, and the good performance of the welding joint is guaranteed.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a TIG welding method for low-activation martensitic steel, which is applied in the development of cladding of a fusion reactor solid-state breeder. Background technique [0002] The International Thermonuclear Experimental Reactor (ITER) is an international cooperative research program project to verify the feasibility of fusion energy science and technology. An important function of ITER is to test the tritium-producing cladding experimental module. Its main goal is to verify and obtain related technologies for tritium breeding, which is very important for the future development of fusion test demonstration reactors. Low activation martensitic steel has excellent thermophysical and mechanical properties such as low radiation swelling, thermal expansion coefficient, and high thermal conductivity. It is the preferred structural material for cladding experimental modul...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/32
CPCB23K9/167B23K9/32
Inventor 王晓宇胡志强武兴华廖洪彬秦超
Owner SOUTHWESTERN INST OF PHYSICS
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