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Wrought alloy pig for nuclear steam turbine and manufacturing method thereof

A production method and alloy ingot technology, which is applied in the field of wrought alloy ingots for nuclear power steam turbines and its production, can solve the problems that bronze ingots cannot meet the demand and are not easy to be secondary formed, so as to enhance the forgeability and ductility, reduce the internal and external Pores, loss reduction effect

Active Publication Date: 2012-08-08
SUZHOU JINCANG ALLOY NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the vigorous development of the nuclear power industry, the bronze ingots currently used are increasingly unable to meet the needs of high-standard alloy ingots for pumps and valves at home and abroad.
In addition, the traditional process of making bronze ingots is foundry casting, which is very easy to produce pores and surface inclusions, and it is not easy to secondary molding

Method used

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  • Wrought alloy pig for nuclear steam turbine and manufacturing method thereof
  • Wrought alloy pig for nuclear steam turbine and manufacturing method thereof
  • Wrought alloy pig for nuclear steam turbine and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A wrought alloy ingot for nuclear power steam turbines. The alloy ingot components include aluminum, iron, manganese, rhenium or lanthanum or cerium, and copper. The components of the alloy ingot are respectively: 13% by weight of aluminum and 1% by weight. %, manganese 5%, rhenium or lanthanum or cerium 0.2%, copper 80.8%.

[0040] The manufacturing method of the above-mentioned wrought alloy ingot for nuclear power steam turbine includes the following steps:

[0041] i. Placed in a power frequency electric furnace according to the ratio of aluminum 13%, iron 1%, manganese 5%, rhenium or lanthanum or cerium 0.2%, and copper 80.8%, heated to 1280°C, and kept warm after being completely melted;

[0042] ii. The alloy is prone to segregation during casting. A draft tube is used to directly introduce the melt into the mold. The mold is coated with lubricating oil. The furnace is covered with carbon black with a thickness of 10-20mm to reduce the chance of oxidation and slag gener...

Embodiment 2

[0050] A wrought alloy ingot for nuclear power steam turbines. The alloy ingot components include aluminum, iron, manganese, rhenium or lanthanum or cerium, and copper. The components of the alloy ingot are respectively 15% by weight and 2% by weight. %, manganese 7%, rhenium or lanthanum or cerium 1%, copper 75%.

[0051] The manufacturing method of the above-mentioned wrought alloy ingot for nuclear power steam turbine includes the following steps:

[0052] i. Place it in a power frequency electric furnace at a ratio of 15% aluminum, 2% iron, 7% manganese, rhenium or lanthanum or cerium 1% and copper 75%, and heat it to 1280°C, keep it warm after being completely melted;

[0053] ii. The alloy is prone to segregation during casting. A draft tube is used to directly introduce the melt into the mold. The mold is coated with lubricating oil. The furnace is covered with carbon black with a thickness of 10-20mm to reduce the chance of oxidation and slag generation. ;

[0054] iii. Use r...

Embodiment 3

[0061] A wrought alloy ingot for nuclear power steam turbines. The alloy ingot components include aluminum, iron, manganese, rhenium or lanthanum or cerium, and copper. The composition of each component of the alloy ingot by weight percentage is: aluminum 16%, iron 3 %, manganese 9%, rhenium or lanthanum or cerium 1.5%, copper 70.5%.

[0062] The manufacturing method of the above-mentioned wrought alloy ingot for nuclear power steam turbine includes the following steps:

[0063] i. Placed in a power frequency electric furnace at a ratio of 16% aluminum, 3% iron, 9% manganese, rhenium or lanthanum or cerium 1.5% and copper 70.5%, heated to 1280°C, and kept warm after being completely melted;

[0064] ii. The alloy is prone to segregation during casting. A draft tube is used to directly introduce the melt into the mold. The mold is coated with lubricating oil. The furnace is covered with carbon black with a thickness of 10-20mm to reduce the chance of oxidation and slag generation. ; ...

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Abstract

The invention provides a wrought alloy pig for a nuclear steam turbine. The alloy pig comprises the components of aluminum, iron, manganese, rhenium or lanthanum or cerium and copper, wherein the components of the alloy pig are as follows by weight percentage: 13-16% of the aluminum, 1-3% of the iron, 5-9% of the manganese, 0.2-1.5% of the rhenium or the lanthanum or the cerium and 70.5-80.8% of the copper. According to the invention, the rare-earth element of rhenium or lanthanum or cerium which is added into the traditional bronze pig is easily combined and molded with alloys including the copper and the like, so that the forgeability and the ductility of the alloys are greatly enhanced and the loss caused by forge crack of a product in a nuclear pump valve type sectional material. Furthermore, the invention provides the manufacturing method of the wrought alloy pig for the nuclear steam turbine; a traditional sand casting method is changed into a continuous casting method; and inner and outer air pores of the product are reduced so that the crystallization of the product is more fine and smooth.

Description

Technical field [0001] The invention relates to the field of alloy bars, in particular to a wrought alloy ingot for nuclear power steam turbines and a manufacturing method thereof. Background technique [0002] Bronze ingots have good ductility and forgeability, so they are widely used. They are mainly used in the technical field of nuclear power steam turbines, specifically for forging and forming various valve blocks and wear-resistant pump blocks. However, with the vigorous development of the nuclear power industry, the bronze ingots currently used have become increasingly unable to meet the demand for high-standard pump valve alloy ingots at home and abroad. In addition, the traditional process for making bronze ingots is sand foundry casting, which is very easy to produce pore surface inclusions and is not easy to reshape. Summary of the invention [0003] The purpose of the present invention is to provide a wrought alloy ingot for nuclear power steam turbines with greatly i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/01B22D7/00C22F1/08
Inventor 孙飞
Owner SUZHOU JINCANG ALLOY NEW MATERIAL
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