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Treatment technology for titanium alloy blade of ammonia condenser in nuclear power station

An ammonia condenser and processing technology technology, which is applied to the processing technology field of titanium alloy blades for ammonia condensers in nuclear power plants, can solve the problems of wasting manpower, material resources and financial resources, difficult to produce heat exchange tube alloys, etc., and achieves reduction of mold deformation. and mold wear degree, good wear resistance and lubricity, and the effect of improving dimensional accuracy

Inactive Publication Date: 2015-08-19
JIANGSU JINYUAN TENGFENG HEAT EXCHANGE EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, it is difficult for domestic manufacturers to produce high-performance heat exchange tube alloys, so they can only rely on imports. Once there is a problem with the cooler of the nuclear power unit, they can only wait for foreign manufacturers to solve it, which wastes a lot of manpower, material and financial resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A treatment process for a titanium alloy blade for a nuclear power plant ammonia condenser provided in this embodiment includes the following specific steps:

[0032] Titanium alloy blade blanks are selected according to mass percentage and include: C: 3.3-4.2%, Si: 0.2-3.6%, Mn: 0.3-1.0%, P<0.1%, S<0.05%, Ni: 0.2-3.0%, V: 0.2-1.5%, Ti: 0.04-0.6%, the remainder is trace elements such as Fe and Cr and Co in a total amount of <0.3%; put the above alloy materials into the melting furnace, and put rare earth elements, rare earth elements into the melting furnace The total weight of the elements is 0.10-0.125% of the above alloy material; the rare earth rare earth elements contain the following components by weight percentage: Gd: 15-18%, Pr: 3-5%, Dy: 7-9%, Ac: 12.5-12.8%, Nd: 15-20%, Sm: 11-13%, and the balance is La;

[0033] The temperature of the smelting furnace is raised to 910°C. After the furnace charge is completely melted, it is fully stirred, and it is kept a...

Embodiment 2

[0042] A treatment process for a titanium alloy blade for a nuclear power plant ammonia condenser provided in this embodiment includes the following specific steps:

[0043] Titanium alloy blade blanks are selected according to mass percentage and include: C: 3.3-4.2%, Si: 0.2-3.6%, Mn: 0.3-1.0%, P<0.1%, S<0.05%, Ni: 0.2-3.0%, V: 0.2-1.5%, Ti: 0.04-0.6%, the remainder is trace elements such as Fe and Cr and Co in a total amount of <0.3%; put the above alloy materials into the melting furnace, and put rare earth elements, rare earth elements into the melting furnace The total weight of the elements is 0.20-0.25% of the above alloy material; the rare earth rare earth elements contain the following components by weight percentage: Gd: 15-18%, Pr: 3-5%, Dy: 7-9%, Ac: 12.5-12.8%, Nd: 15-20%, Sm: 11-13%, and the balance is La;

[0044] The temperature of the smelting furnace is raised to 940°C, fully stirred after the furnace charge is completely melted, and kept at 940°C for 2...

Embodiment 3

[0053] A treatment process for a titanium alloy blade for a nuclear power plant ammonia condenser provided in this embodiment includes the following specific steps:

[0054] Titanium alloy blade blanks are selected according to mass percentage and include: C: 3.3-4.2%, Si: 0.2-3.6%, Mn: 0.3-1.0%, P<0.1%, S<0.05%, Ni: 0.2-3.0%, V: 0.2-1.5%, Ti: 0.04-0.6%, the remainder is trace elements such as Fe and Cr and Co in a total amount of <0.3%; put the above alloy materials into the melting furnace, and put rare earth elements, rare earth elements into the melting furnace The total weight of the elements is 0.10-0.125% of the above alloy material; the rare earth rare earth elements contain the following components by weight percentage: Gd: 15-18%, Pr: 3-5%, Dy: 7-9%, Ac: 12.5-12.8%, Nd: 15-20%, Sm: 11-13%, and the balance is La;

[0055] The temperature of the smelting furnace is raised to 920°C. After the furnace charge is completely melted, it is fully stirred, and it is kept ...

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PUM

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Abstract

The invention discloses a treatment technology for a titanium alloy blade of an ammonia condenser in a nuclear power station. A blade blank comprises the following alloy materials in percentage by mass: 3.3-4.2 percent of C, 0.2-3.6 percent of Si, 0.3-1.0 percent of Mn, 0-0.1 percent of P, 0-0.05 percent of S, 0.2-3.0 percent of Ni, 0.2-1.5 percent of V, 0.04-0.6 percent of Ti, and the balance of Fe and 0-0.3 percent of microelements such as Cr and Co. The treatment technology comprises the following steps: placing the alloy materials into a melting furnace, and placing a rare-earth element into the melting furnace, wherein the total weight of the rare-earth element is 0.20-0.25 percent of that of the alloy materials, and the rare-earth element comprises the following components in percentage by weight: 15-18 percent of Gd, 3-5 percent of Pr, 7-9 percent of Dy, 12.5-12.8 percent of Ac, 15-20 percent of Nd, 11-13 percent of Sm and the balance of La. The titanium alloy blade has the advantages of high-temperature resistance, corrosion resistance, abrasion resistance, good lubricity and the like, and the deformation and abrasion degree of a die is reduced during a casting process so that the dimensional precision of the titanium alloy blade is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing condensers for nuclear power plants, in particular to a treatment process for titanium alloy blades for ammonia condensers in nuclear power plants. Background technique [0002] Titanium alloy is a special stainless steel. The main alloying elements are chromium, molybdenum, tungsten, cobalt, aluminum, titanium, boron and zirconium, etc. Among them, chromium plays an anti-oxidation and anti-corrosion role, and other elements play a strengthening role; nickel-based The alloy has high strength, oxidation resistance, and gas corrosion resistance at high temperatures of 850-1300 ° C. It is the most widely used high-temperature alloy among high-temperature alloys. It is not only used in aerospace, nuclear reactors, etc., but also Widely used in high-temperature parts of energy conversion equipment such as the aforementioned heat exchangers and condensers; compared with the well-known ordinary sta...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C14/00C22F1/18B23P15/02
Inventor 李明祥朱冬宏陈道祥
Owner JIANGSU JINYUAN TENGFENG HEAT EXCHANGE EQUIP CO LTD