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Fe-Ni base alloy welding wire for 800h alloy welding and preparation method thereof, welding method of 800h alloy

A technology of 800H and welding method, applied in the direction of welding equipment, welding equipment, welding medium, etc., can solve the problems of decreased tensile strength and hidden dangers in the safe operation of nuclear power units

Active Publication Date: 2021-05-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the welding wire used for welding 800H alloy is Inconel 82 welding wire, which has better tensile strength at room temperature after welding, but after working under high temperature conditions, the tensile strength will decrease, burying hidden dangers for the safe operation of nuclear power units

Method used

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  • Fe-Ni base alloy welding wire for 800h alloy welding and preparation method thereof, welding method of 800h alloy
  • Fe-Ni base alloy welding wire for 800h alloy welding and preparation method thereof, welding method of 800h alloy
  • Fe-Ni base alloy welding wire for 800h alloy welding and preparation method thereof, welding method of 800h alloy

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Experimental program
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Effect test

preparation example Construction

[0045] The present invention provides the preparation method of Fe-Ni base alloy welding wire for 800H alloy welding described in above-mentioned technical scheme, comprises the following steps:

[0046] According to the chemical composition batching of the Fe-Ni base alloy welding wire described in the above technical solution, the obtained raw material mixture is then subjected to vacuum melting, casting, forging, hot rolling and drawing in sequence to obtain the Fe-Ni base alloy welding wire.

[0047] The present invention has no special requirements on the sources of raw materials corresponding to the chemical components in the Fe-Ni-based alloy welding wire described in the above technical solution, and those well-known to those skilled in the art can be used. It should be noted that the S, P, and N elements are impurity elements in the raw materials corresponding to the Fe component, and no additional addition is required.

[0048] After batching, the present invention c...

Embodiment 1

[0065] according to figure 1 The flow chart shown in the test is carried out:

[0066] Dispensing according to the chemical composition shown in Table 1, followed by melting in a vacuum induction melting furnace (ZG-0.05), vacuum melting at 1590°C at 1 Pa, and casting, followed by forging, hot rolling and drawing in sequence, among which forging and the process parameters of hot rolling are listed in table 2, obtain the Fe-Ni base alloy welding wire that diameter is 1.2mm, for subsequent use;

[0067] Using the above-mentioned Fe-Ni-based alloy welding wire as the filler wire, argon tungsten arc welding was performed on the 800H alloy plate (300mm×100mm×2mm). The welding process parameters are shown in Table 3.

Embodiment 2～5

[0069] According to the method of Example 1, Fe-Ni-based alloy welding wire was provided, and argon tungsten arc welding was performed. The chemical composition, preparation conditions and welding process parameters of the welding wire are listed in Tables 1-3 respectively.

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Abstract

The invention belongs to the technical field of welding materials, and in particular relates to an Fe-Ni-based alloy welding wire for welding 800H alloys, a preparation method thereof, and a welding method for 800H alloys. The chemical composition of the Fe-Ni-based alloy welding wire provided by the invention is reasonable. After being used for welding 800H alloy, the tensile strength of the obtained weld at room temperature is 557.6MPa, the elongation is 37.5%, and the tensile strength at 650°C is 420MPa. The elongation was 17.25%.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to an Fe-Ni-based alloy welding wire for welding 800H alloys, a preparation method thereof, and a welding method for 800H alloys. Background technique [0002] The heat transfer tube of the steam generator is one of the key components in the nuclear power unit. At present, the material of the heat transfer tube of the steam generator at home and abroad is made of Fe-Cr-Ni alloy (800H alloy). 800H alloy is widely used in the manufacture of steam generator heat transfer tubes due to its high creep / fracture strength and high temperature corrosion resistance. However, the early failure of the welded joints of the heat transfer tubes during service will bring huge hidden dangers to the long-term safe and stable operation of the unit. [0003] The development of suitable welding wire is the key to solve the problem of early failure of welded joints. At present, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40B23K9/167
CPCB23K35/30B23K35/40B23K9/167B23K35/304C22C38/002C22C38/48C22C38/04C22C38/02C22C38/54C22C33/04B23K35/3066B23K35/0261C22C38/44C22C38/001C21D7/13C22C38/06C22C38/46C22C38/50C22C38/42C22C38/08C22C38/58C22C38/52B23K35/0266B23K35/3053C21D6/004B23K35/3073C22C38/12B23K2103/50B23K2103/04
Inventor 罗锐程晓农袁志钟陈乐利郑琦
Owner JIANGSU UNIV
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