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Nuclear power pipe fittings material forging and manufacture process

A manufacturing process and pipeline technology, which is applied in the field of nuclear power pipeline material forgings and manufacturing processes, can solve the problems of low tensile strength and high yield strength, not meeting the use requirements of wind towers, and low corrosion resistance of forgings. Toughness and low temperature impact performance are improved, defects are significantly reduced, and the effect of ensuring corrosion resistance

Active Publication Date: 2013-05-15
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Forgings of nuclear power piping materials require good corrosion resistance, high requirements for tensile strength and high yield strength, and small surface roughness. The performance is not high, the tensile strength and high yield strength are not high, the surface roughness is high, and there are problems such as loose tissue, pores, trachoma, etc., which do not meet the requirements for the use of wind towers, or the service life is short

Method used

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  • Nuclear power pipe fittings material forging and manufacture process

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Effect test

Embodiment 1

[0029] The mass percentage of the chemical composition of the nuclear power pipe material forging in this embodiment is: C: 0.35%, Si: 0.45%, Mn: 0.95%, Ni: 4%, Cr: 1%, Nb: 0.25%, Cu: 0.75%, N: 0.02%, Mo: 0.08%, Al: 0.4%, S: 0.04-0.06%, Ti: 0.03%, V: 0.06%, B: 0.006%, P: 0.003%, lanthanide rare earth: 4 %, the balance is Fe; the mass percentage of lanthanide rare earth components is: lanthanum: 36%, cerium: 14%, europium: 10%, terbium: 10%, gadolinium: 15%, praseodymium: 5%, holmium: 4 %, erbium: 5%, other lanthanides: 1%.

[0030] The manufacturing process of the nuclear power pipe material forging in this embodiment is carried out according to the following procedures: material selection - blanking - heating - forging - heat treatment after forging - machining - physical and chemical inspection and ultrasonic flaw detection - heat treatment - finishing and ultrasonic flaw detection or magnetic particle flaw detection —Clean packaging—packaging; in the above processes, mater...

Embodiment 2

[0036] The mass percentage of the chemical composition of the nuclear power pipe material forging in this embodiment is: C: 0.40%, Si: 0.35%, Mn: 1.05%, Ni: 2%, Cr: 2%, Nb: 0.45%, Cu: 0.55%, N: 0.04%, Mo: 0.1%, Al: 0.4-0.6%, S: 0.06%, Ti: 0.05%, V: 0.08%, B: 0.008%, P: 0.005%, lanthanide rare earth: 5 %, the balance is Fe; the mass percentage of lanthanide rare earth components is: lanthanum: 40%, cerium: 15%, europium: 5%, terbium: 12%, gadolinium: 10%, praseodymium: 9%, holmium: 5% %, erbium: 2%, other lanthanides: 2%.

[0037] The manufacturing process of the nuclear power pipe material forging in this embodiment is carried out according to the following procedures: material selection - blanking - heating - forging - heat treatment after forging - machining - physical and chemical inspection and ultrasonic flaw detection - heat treatment - finishing and ultrasonic flaw detection or magnetic particle flaw detection —Clean packaging—packaging; in the above processes, materia...

Embodiment 3

[0043] The mass percentage of the chemical composition of the nuclear power pipe material forging in this embodiment is: C: 0.45%, Si: 0.40%, Mn: 1%, Ni: 3%, Cr: 3%, Nb: 0.35%, Cu: 0.65%, N: 0.03%, Mo: 0.09%, Al: 0.4-0.6%, S: 0.05%, Ti: 0.04%, V: 0.07%, B: 0.007%, P: 0.004%, lanthanide rare earth: 6 %, the balance is Fe; the mass percentage of lanthanide rare earth components is: lanthanum: 25%, cerium: 6%, europium: 8%, terbium: 13%, gadolinium: 22%, praseodymium: 6%, holmium: 9% %, erbium: 10%, other lanthanides: 1%.

[0044] The manufacturing process of the nuclear power pipe material forging in this embodiment is carried out according to the following procedures: material selection - blanking - heating - forging - heat treatment after forging - machining - physical and chemical inspection and ultrasonic flaw detection - heat treatment - finishing and ultrasonic flaw detection or magnetic particle flaw detection —Clean packaging—packaging; in the above processes, material ...

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Abstract

The invention relates to a nuclear power pipe fittings material forging and a manufacture process, the manufacture process comprises the following steps: selecting materials, blanking, heating, forging, performing thermal treatment after forging, machining, performing physical and chemical inspection and ultrasonic flaw detection, performing thermal treatment, performing finish machining and ultrasonic flaw detection or magnetic powder inspection, cleaning the package and packaging. According to the limitation of components and technological parameters, a proper amount of lanthanide series rare earth element is added, the thermal treatment process with twice normalizing and twice tempering can avoid the intergranular precipitation of a carbide, carburization and nitridation during the thermal treatment process can be avoided, and the corrosion resistance of the material can be avoided.

Description

technical field [0001] The invention relates to a forging and a manufacturing process, in particular to a nuclear power pipe material forging and a manufacturing process. Background technique [0002] In November 2007, the State Council officially approved the "National Nuclear Power Development Special Plan 2005-2020". The power generation will reach 260 billion-280 billion kwh. It is mentioned in the "Planning" that currently my country's nuclear power accounts for less than 2% of the total installed capacity of electricity; by 2020, this proportion will increase to 4%. This means that my country's nuclear power development is "warming up." Nuclear energy has become an important choice for energy optimization and development under my country's low-carbon economic model. [0003] Forgings of nuclear power piping materials require good corrosion resistance, high requirements for tensile strength and high yield strength, and small surface roughness. The performance is not...

Claims

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Application Information

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IPC IPC(8): C22C38/54C21D8/10
Inventor 是玉丰
Owner WUXI PAIKE HEAVY CASTING & FORGING
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