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Ultra-low temperature austenite stainless steel solid core welding wire

A technology of austenitic stainless steel and solid wire, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc.

Inactive Publication Date: 2013-04-17
WUHAN RUNZHIDA PETROCHEM EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Invention patent 201110308343.0 is a high-strength and toughness fully austenitic stainless steel welding wire. Although it emphasizes the improvement of the toughness of the weld metal, it is still quite different from the technical content and use of the present invention.

Method used

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  • Ultra-low temperature austenite stainless steel solid core welding wire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, the stainless steel welding wire composition of welding 304L:

[0016] C: ≤0.03%, Si: ≤0.60%, Cr: 19.0~22.0%, Ni: 10~12%, Mo: 0%, Mn: 2.0~4.0%, N: 0.05~0.10%, S≤0.015, P ≤0.015%, RE: 0.10% (added amount), the balance is Fe.

Embodiment 2

[0017] Embodiment 2, the stainless steel welding wire composition of welding 316LN:

[0018] C: ≤0.03%, Si: ≤0.60%, Cr: 22.0~26.0%, Ni: 12~15%, Mo: 2.5~3.5%, Mn: 4.0~6.5%, N: 0.12~0.18%, S≤0.015 , P≤0.015%, RE: 0.10% (added amount), the balance is Fe.

[0019] The welding wire of embodiment 2 of this technical solution was used in the overlay welding test project of the international thermonuclear fusion experiment, and the welding performance is good, and its weld metal can fully meet the use of 316LN in an ultra-low temperature environment.

[0020] Below is 316LN stainless steel material, the technical data welded with technical achievement of the present invention:

[0021]

[0022] According to the fourth part of GB150-2011 "Pressure Vessels", the impact energy index of stainless steel at low temperature -100 ℃ is ≥31J. However, the impact energy index of the welding material of the present invention reaches 106.7J at -196°C, indicating that its low-tempera...

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Abstract

The invention aims to the characteristic that ultra-low temperature stainless steel material is required to be good in low-temperature flexibility, and provides a stainless steel alloy welding wire. The stainless steel alloy welding wire can ensure that the austenite structure of weld metal achieves more than 99%; the welding seam center can achieve about 100J under the impact ductility of lower than 77K; the welding wire is good in low-temperature flexibility, and comprises the following ally components: smaller than or equal to 0.03% of C, smaller than or equal to 1.00% of Si, 18.0-26.0% of Cr, 10%-25% of Ni, 0-5.5% of Mo, 1.5%-7.0% of Mn, 0.05%-0.25% of N, smaller than or equal to 0.015% of S, smaller than or equal to 0.015% of P, 0-0.6% of RE, and the balance of Fe. The ultra-low temperature austenite stainless steel solid core welding wire can be widely applied to the technical field of welding ultra-low temperature stainless steel pressure containers and special structures.

Description

technical field [0001] The technology relates to the field of welding materials for austenitic stainless steel. Background technique [0002] Due to the industrial application of liquid nitrogen and liquid helium, as well as the application of ultra-low temperature stainless steel containers and equipment used in the transportation of liquefied natural gas, high requirements are placed on the welding of austenitic stainless steel materials. [0003] The best performance in ultra-low temperature environment is ultra-low carbon austenitic stainless steel, and these materials must maintain relatively stable austenite structure when used in ultra-low temperature environment, but in stainless steel welding theory, it does not emphasize the weld metal The stability of the austenite structure, on the contrary, emphasizes the need to increase the scope of part of the ferrite, otherwise it is easy to cause welding hot cracks. On the contrary, in the use environment of ultra-low tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
Inventor 束润涛
Owner WUHAN RUNZHIDA PETROCHEM EQUIP CO LTD
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