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A Welding Process for Dissimilar Steel Joints between Low-Activation Martensitic Steel and 316l Stainless Steel

A martensitic steel, welding process technology, applied in welding equipment, welding accessories, welding/welding/cutting items, etc., can solve the problems of reducing the service performance of dissimilar steel joints, reducing joint performance, and high energy input, and achieving improved Welding efficiency, reduced line energy, good reliability

Active Publication Date: 2018-11-06
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disclosed low-activation steel and 316L stainless steel dissimilar steel joint welding process line has high energy input, which easily leads to welding cold cracks, widens the welding heat-affected zone, and reduces the service performance of dissimilar steel joints.
A survey of patents related to dissimilar steel welding (CN201510121875) found that the use of nickel-based alloy welding wire to realize dissimilar steel welding has high production costs, and due to the large difference between the filler metal and the base metal, the joint between the weld metal and the base metal will be detached. The widening of the carbon layer leads to a decrease in joint performance

Method used

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  • A Welding Process for Dissimilar Steel Joints between Low-Activation Martensitic Steel and 316l Stainless Steel
  • A Welding Process for Dissimilar Steel Joints between Low-Activation Martensitic Steel and 316l Stainless Steel
  • A Welding Process for Dissimilar Steel Joints between Low-Activation Martensitic Steel and 316l Stainless Steel

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Effect test

Embodiment 1

[0017] A welding process for CLAM steel and 316L stainless steel dissimilar steel joints, the preparation process of the test plate to be welded before welding, the groove form V-shaped groove angle α=60℃, and the groove bottom gap is 2mm. Welding process and process parameters: the bottom welding layer adopts ER309 welding wire with a diameter of 0.8mm, the current range is 65A, the voltage range is 12V, the welding speed range is 55mm / min, and the argon flow range on the front of the weld bead is 7L / min; the filling layer adopts a diameter of 0.8 mm ER309 welding wire, current range 85A, voltage range 12V, welding speed range 70mm / min, front argon flow range of the weld bead 6L / min; cover welding layer adopts 0.8mm diameter ER309 welding wire, current range 95A, voltage range 12V , The welding speed range is 70mm / min, and the argon gas flow range on the front of the welding bead is 6L / min. During the whole welding process, the argon gas flow on the back of the weld bead is 10...

Embodiment 2

[0042] A welding process of CLAM steel and 316L stainless steel dissimilar steel joints, the preparation process of the test plate to be welded before welding, the groove form V-shaped groove angle α=65℃, and the groove bottom gap is 2mm. Welding procedure and process parameters: The bottom welding layer adopts ER309 welding wire with a diameter of 1.0mm, the current range is 75A, the voltage range is 13V, the welding speed range is 65mm / min, and the argon flow range on the front side of the welding bead is 7L / min; the filling welding layer adopts a diameter of 1.0 mm ER309 welding wire, current range 90A, voltage range 14V, welding speed range 70mm / min, front argon flow range of the weld bead 6L / min; cover welding layer adopts 1.0mm diameter ER309 welding wire, current range 100A, voltage range 15V , The welding speed range is 80mm / min, and the argon flow range on the front of the welding bead is 6L / min. During the whole welding process, the argon gas flow on the back of the w...

Embodiment 3

[0048] A welding process of CLAM steel and 316L stainless steel dissimilar steel joints, the preparation process of the test plate to be welded before welding, the groove form V-shaped groove angle α=65℃, and the groove bottom gap is 2mm. Welding procedure and process parameters: The bottom welding layer adopts ER309 welding wire with a diameter of 1.2mm, the current range is 85A, the voltage range is 13V, the welding speed range is 70mm / min, and the argon flow range on the front side of the weld bead is 7L / min; the filling layer adopts a diameter of 1.2 mm ER309 welding wire, current range 90A, voltage range 14V, welding speed range 70mm / min, front argon flow range of the weld bead 6L / min; cover welding layer adopts 1.2mm diameter ER309 welding wire, current range 105A, voltage range 15V , The welding speed range is 80mm / min, and the argon flow range on the front of the welding bead is 6L / min. During the whole welding process, the argon gas flow on the back of the weld bead is...

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Abstract

The invention provides a welding process for a low-activation martensitic steel and 316L stainless steel dissimilar steel joint. The welding process comprises a preparation procedure before welding, a welding procedure and process parameters, and a welding heat treatment procedure. The welding process provided by the invention is low in cost, high in welding efficiency, high in process stability and reliability, and capable of reducing linear energy, controlling the fusion ratio of a welding seam, and obtaining a qualified welded joint; and welding seam performance meets the needs of high-temperature strength and high-temperature operation condition.

Description

Technical field [0001] The invention relates to the technical field of welding, in particular to a welding process for a joint of low-activated martensitic steel and 316L stainless steel dissimilar steel. Background technique [0002] Low activation martensitic steel is considered that some nuclides will produce long half-life radionuclides after fusion reaction high-energy neutron irradiation. W is used instead of alloying elements Mo, V and Ta instead of alloying elements Nb, and reduce or Limit other elements such as Ni, Cu, Co, Ag, Sn, etc. to achieve low activation requirements. Internationally, many countries including China have carried out related research on low activation martensitic steel. At present, low activation martensitic steel has been selected as the structural material of the International Thermonuclear Experimental Reactor (ITER) experimental blanket module and the future commercial fusion reactor. [0003] According to the current design of the ITER experime...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/23B23K9/02B23K9/235B23K9/32B23K9/095B23K9/16B23K103/04
CPCB23K9/02B23K9/095B23K9/164B23K9/232B23K9/235B23K9/32B23K2103/04B23K2103/05
Inventor 吴宜灿黄群英黄波刘少军吴庆生张俊钰
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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