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Deposited metal of stainless steel welding rod for fast reactor

A technology of deposited metal and stainless steel, which is applied in the field of deposited metal, can solve problems such as insufficient strength, low impact toughness, and failure to meet the technical requirements for welding of fast stack metal pumps, etc., and achieves no intergranular corrosion tendency and stable comprehensive mechanical properties and the effect of corrosion resistance

Inactive Publication Date: 2019-10-25
HARBIN WELL WELDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing E316 stainless steel electrode has insufficient strength and low impact toughness after heat treatment, and does not meet the technical requirements of fast stack metal pump welding, and provides a kind of deposited metal of stainless steel electrode for fast stack

Method used

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  • Deposited metal of stainless steel welding rod for fast reactor
  • Deposited metal of stainless steel welding rod for fast reactor
  • Deposited metal of stainless steel welding rod for fast reactor

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specific Embodiment approach 1

[0013] Specific Embodiment 1: In this embodiment, a deposited metal of a stainless steel electrode for fast stacking, the mass fraction of the chemical composition of the deposited metal is C: 0.04% to 0.08%, Si: 0.30% to 0.90%, and Mn: 1.00 %~2.50%, P≤0.025%, S≤0.020%, Cr: 17.00%~20.00%, Ni: 11.00%~14.00%, Mo: 2.00%~3.00%, N: 0.02%~0.12%, the balance is Fe, and the ferrite content is 3FN~7FN.

[0014] The beneficial effect of this implementation mode:

[0015] 1. The deposited metal of a stainless steel electrode for fast stacking in this embodiment has high tensile strength at 550°C after heat treatment at 975°C×2h (Rm≥402MPa), room temperature impact KV2 can be stably greater than 60J, after aging test ( Impact energy KV after 975℃×2h+750℃×100h) 2 More than 25J, it has good and stable comprehensive mechanical properties and corrosion resistance, and has no intergranular corrosion tendency, which fully meets the technical requirements of fast reactor metal pump welding.

...

specific Embodiment approach 2

[0018] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the mass fraction of the chemical composition of the deposited metal is C: 0.05%-0.07%, Si: 0.30%-0.90%, Mn: 1.00%-2.50 %, P≤0.020%, S≤0.015%, Cr: 17.00%~20.00%, Ni: 11.00%~14.00%, Mo: 2.00%~3.00%, N: 0.02%~0.12%, the balance is Fe, and The ferrite content is 4FN~6FN.

[0019] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass fraction of the chemical composition of the deposited metal is C: 0.050%, Si: 0.44%, Mn: 2.10%, P: 0.018%, S: 0.006%, Cr: 18.97%, Ni: 11.56%, Mo: 2.49%, N: 0.065%, the balance is Fe, and the ferrite content is 5.5FN.

[0021] Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The utility model provides a deposit metal of stainless steel welding rod for fast reactor, relates to the technical field of welding materials, and particularly relates to a deposit metal of stainless steel welding rod. The invention aims to solve the problems that the deposited metal of the E316 stainless steel welding rod in the prior art is insufficient in strength and low in impact toughnessafter heat treatment and cannot meet the technical requirements of fast reactor metal pump welding. The mass fractions of deposited metal chemical components of the stainless steel welding rod for thefast reactor are C: 0.04%-0.08%, Si: 0.30%-0.90%, Mn: 1.00%-2.50%, P is less than or equal to 0.025%, S is less than or equal to 0.020%, Cr: 17.00%-20.00%, Ni: 11.00%-14.00%, Mo: 2.00%-3.00%, and N:0.02%-0.12%, the balance being Fe, and the ferrite content being 3FN-7FN. The invention is suitable for welding the main equipment of a fast neutron reactor.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a deposited metal of a stainless steel electrode. Background technique [0002] There are currently three types of fast reactors that may be commercially applied, namely gas-cooled fast reactors, lead-cooled fast reactors, and sodium-cooled fast reactors. The material of a fast reactor metal pump is 316 austenitic stainless steel, its normal working temperature is 360°C, and its extreme working temperature is 550°C. Metal pumps have been in service under high temperature conditions for a long time, and have high requirements for high temperature strength, impact toughness, and structural stability. In order to ensure the dimensional stability of the pump body, post-weld heat treatment at 950-1100 °C is required to fully eliminate the welding residual stress of the weld, but the impact toughness of the deposited metal is significantly reduced after heat treatment. [0...

Claims

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Application Information

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IPC IPC(8): B23K35/30
CPCB23K35/0261B23K35/3086
Inventor 陈波陈佩寅王猛霍树斌陈燕王庆江张学刚孙婷婷刘满雨刘金湘宋立群郭枭
Owner HARBIN WELL WELDING CO LTD
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