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Fe-ni-cr welding wire and its preparation method and welding process

A fe-ni-cr, welding process technology, used in welding equipment, manufacturing tools, welding media, etc., can solve problems such as lack, and achieve the effect of good elongation and high tensile strength

Active Publication Date: 2022-07-08
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is a lack of matching welding materials suitable for Incoloy 800H heat transfer tubes / plugs on the market. Therefore, it is of great engineering practical value to develop matching plugging welding wires based on the thermophysical properties of the base metal and its service environment.

Method used

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  • Fe-ni-cr welding wire and its preparation method and welding process
  • Fe-ni-cr welding wire and its preparation method and welding process
  • Fe-ni-cr welding wire and its preparation method and welding process

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preparation example Construction

[0068] On the other hand, the preparation method of Fe-Ni-Cr welding wire provided by this embodiment is used for preparing the above-mentioned Fe-Ni-Cr welding wire, including the following steps:

[0069] Weighing powder: by mass percentage: Ni powder 60.0-65.0%, Cr powder 15.0-20.0%, Mn powder 8.0-10.0%, Ce powder 0.01-0.05%, Nb+W powder 3.0-4.0%, the rest are Fe powder, Wherein, the sum of the mass percentages of all the above ingredients is 100%, to take the medicinal powder;

[0070] Drying the medicinal powder: heating the medicinal powder in a vacuum environment (for example, a vacuum heating furnace) to remove the crystal water in the medicinal powder.

[0071] Mixing medicinal powder: fully mix the dried medicinal powder, and the mixing time range is: 1-2h; specifically, the dried medicinal powder can be placed in a powder mixer for mixing;

[0072] Coating powder: remove the grease on the surface of the welding skin, and then wrap the mixed powder in the welding sk...

Embodiment 1

[0094] Step 1, take the medicinal powder: respectively weigh the medicinal powder by mass percentage, wherein, Ni powder 60.0%, Cr powder 15.0%, Mn powder 8.0%, Nb+W powder 3.0%, Ce powder 0.01%, and the rest are Fe powder, above. The sum of the mass percentages of the components is 100%;

[0095] Step 2, drying the medicinal powder: place the medicinal powder weighed in step 1 and heat it in a vacuum heating furnace, the heating temperature is 250°C, and the holding time is 1 h, and the crystal water in the medicinal powder is removed;

[0096] Step 3, mixing medicinal powder: the dried medicinal powder is placed in a powder mixer for sufficient mixing, and the mixing time is 1h;

[0097] Step 4, wrapping the medicinal powder: use alcohol to remove the grease on the surface of the 310S stainless steel strip, and wrap the medicinal powder prepared in step 3 in the steel strip through the flux-cored wire drawing equipment;

[0098] Step 5, wire drawing: the wire drawing is use...

Embodiment 2

[0103] Step 1, weigh the medicinal powder: respectively weigh the medicinal powder by mass percentage, wherein, Ni powder 65.0%, Cr powder 20.0%, Mn powder 10.0%, Nb+W powder 4.0%, Ce powder 0.05%, and the rest are Fe powder, above. The sum of the mass percentages of the components is 100%;

[0104] Step 2, drying the medicinal powder: the medicinal powder weighed in step 1 is placed in a vacuum heating furnace for heating, the heating temperature is 300 ° C, and the holding time is 3 h, and the crystal water in the medicinal powder is removed;

[0105] Step 3, mixing the medicinal powder: the dried medicinal powder is placed in the powder mixer to be fully mixed, and the mixing time is 2h;

[0106] Step 4, wrapping the medicinal powder: use alcohol to remove the grease on the surface of the 310S stainless steel strip, and wrap the medicinal powder prepared in step 3 in the steel strip through the flux-cored wire drawing equipment;

[0107] Step 5, wire drawing: the wire draw...

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Abstract

The invention relates to the technical field of alloy welding, in particular to a Fe-Ni-Cr welding wire and a preparation method and welding process thereof, which are applied to the welding of 800H steel. The welding wire includes a welding skin and a powder wrapped in the welding skin. Including ingredients: Ni powder: 60.0-65.0%; Cr powder: 15.0-20.0%; Mn powder: 8.0-10.0%; Ce powder: 0.01-0.05%; The sum of the mass percentages of Nb powder and W powder is : 3.0-4.0%; the rest are Fe powder; wherein, the sum of the mass percentages of the above components is 100%. After using the welding wire to weld the 800H base metal, the welded joint can ensure high tensile strength, elongation and good sealing performance of the welded part under normal temperature and high temperature conditions.

Description

technical field [0001] The invention relates to the technical field of alloy welding, in particular, to a Fe-Ni-Cr welding wire and a preparation method and welding process thereof. Background technique [0002] High temperature gas-cooled reactor refers to the reactor technology that uses helium as the coolant, which has the advantages of good safety, high efficiency, good economy and wide application. The steam generator is one of the most critical equipment in the high temperature gas-cooled reactor nuclear power system. The heat transfer tube is an important part of the pressure boundary of the primary circuit, an important barrier to prevent the leakage of radioactive fission products, and the weakest link in the primary circuit system. . During the service process, the heat transfer tube will be scoured by high temperature, high pressure and high radiation dose medium for a long time, which will cause mechanical or chemical damage, resulting in the damage of the heat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/304B23K35/40Y02E30/30
Inventor 刘福广杨二娟米紫昊王博李勇王艳松刘刚杨兰韩天鹏孙睿
Owner XIAN THERMAL POWER RES INST CO LTD
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