JPH0454559B2 - - Google Patents
Info
- Publication number
- JPH0454559B2 JPH0454559B2 JP6115984A JP6115984A JPH0454559B2 JP H0454559 B2 JPH0454559 B2 JP H0454559B2 JP 6115984 A JP6115984 A JP 6115984A JP 6115984 A JP6115984 A JP 6115984A JP H0454559 B2 JPH0454559 B2 JP H0454559B2
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- brazing
- nuclear power
- primary
- shows
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings or fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings or fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3606—Borates or B-oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【発明の詳細な説明】
本発明は、原子力プラント一次系水部材、例え
ば、蒸気発生器細管のろう付方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for brazing primary water components of a nuclear power plant, such as steam generator capillaries.
通常、安定な酸化皮膜を形成する材料の大気中
におけるろう付には、酸化皮膜を除去する為、塩
化物や弗化物を含む溶剤が使用される。これら溶
剤は腐食性を有する為、ろう付終了後は残留した
溶剤の除去が非常に重要である。しかしながら、
一般にろう付を行う継手形状は、微細な間隙があ
り、溶剤の清掃作業は非常に難しい。 Normally, when materials that form a stable oxide film are brazed in the atmosphere, a solvent containing chloride or fluoride is used to remove the oxide film. Since these solvents are corrosive, it is very important to remove the remaining solvent after brazing. however,
The shape of joints that are generally brazed has minute gaps, making it extremely difficult to clean them with solvent.
原子力発電プラントにおける一次系水の雰囲気
で使用されている機器の部材をろう付する場合、
一次系水の水質は非常にコントロールされてお
り、一般に使用されているフラツクスに含まれる
成分、例えば、弗素、塩素、カルシウム、ナトリ
ウムといつた成分は許容されていない。また、既
に稼動中のプラントに対し、機器の補修にろう付
を用いる場合、溶剤の完全な除去は不可能であ
る。従つて、本発明の目的は、原子力プラント一
次系環境に使用される機器のろう付を、ろう付後
の清掃を行わなくてもその後の運転に悪影響を及
ぼさない溶剤を提供することである。 When brazing components of equipment used in the atmosphere of primary water in a nuclear power plant,
The quality of the primary water is highly controlled and does not tolerate components found in commonly used fluxes, such as fluorine, chlorine, calcium, and sodium. Furthermore, when brazing is used to repair equipment in a plant that is already in operation, it is impossible to completely remove the solvent. Therefore, an object of the present invention is to provide a solvent that does not adversely affect subsequent operation of equipment used in the primary environment of a nuclear power plant, even without cleaning after brazing.
本発明は原子力発電プラントのほう酸、水酸化
リチウムが添加されている一次系水で使用される
機器、部品のろう付にあたり、Li2B4O7単独を溶
剤として用いて金ろうのろう材でろう付を行うこ
とを特徴とする原子力プラント一次系水部材のろ
う付方法に関する。 The present invention uses Li 2 B 4 O 7 as a solvent to braze equipment and parts used in primary water containing boric acid and lithium hydroxide in nuclear power plants. The present invention relates to a method for brazing primary system water components of a nuclear power plant, which involves brazing.
以下に、本発明の構成を説明する。 The configuration of the present invention will be explained below.
一次系水には、ホウ酸H2BO4及び水酸化リチ
ウムLiOHが添加されており、溶剤としては、加
水分解してもそれら組成となる物質であるホウ酸
リチウムLi2B4O7を用いる。 Boric acid H 2 BO 4 and lithium hydroxide LiOH are added to the primary system water, and lithium borate Li 2 B 4 O 7 , which has these compositions even when hydrolyzed, is used as a solvent. .
Li2B4O7を溶剤として行つた金ろうの広がり試
験の結果を、第１図に示す。すなわち、第１図−
（）は、ろう付温度Ｔ(C)とろうの高さｈ（mm）の
関係を示す。試験は、第１図−()に示すよう
に、インコネル600なる母材１の上に、BAu−４
よりなるろう材（金ろう）２をほどこし、第１図
−()に示すように、炉内に挿入し、所定のろう
付温度Ｔに30秒間保持し、その後、炉内より取り
出すことによつて行われる。なお、第１図−()
において、ｈはろうの高さ（mm）を示し、また、
３で示す溶剤は、ろう付後取り除かれる。 Figure 1 shows the results of a gold solder spreading test conducted using Li 2 B 4 O 7 as a solvent. That is, Figure 1-
() shows the relationship between brazing temperature T (C) and solder height h (mm). In the test, as shown in Figure 1-(), BAu-4 was placed on a base material 1 made of Inconel 600.
As shown in Fig. 1-(), the brazing material (gold soldering material) 2 is inserted into the furnace, kept at the predetermined brazing temperature T for 30 seconds, and then taken out from the furnace. It is carried out with In addition, Figure 1-()
, h indicates the wax height (mm), and
The solvent indicated at 3 is removed after brazing.
第１図()の結果より、金ろうの広がりは、ろ
うの融点約950℃に対し、1000℃以上にすれば十
分であることを示しており、溶剤としての作用
は、十分発揮されている。一方、余り温度が上り
すぎると、溶剤は沸とう、分解され、その作用を
果さなくなる。 The results shown in Figure 1 () indicate that the spreading of the gold solder is sufficient at temperatures above 1000°C, compared to the melting point of the solder of approximately 950°C, and its action as a solvent is fully demonstrated. . On the other hand, if the temperature rises too high, the solvent will boil, decompose, and no longer perform its function.
Li2B4O7を用いて実際にろう付を行つた結果
を、第２図の顕微鏡写真に示す。第２図におい
て、()は倍率15倍、()は倍率100倍の顕微鏡写
真である。第２図において、２はろう材、３は溶
剤、４はチユーブ、５はスリーブを示す。 The micrograph in Figure 2 shows the results of actual brazing using Li 2 B 4 O 7 . In Fig. 2, () is a micrograph at 15x magnification, and () is a micrograph at 100x magnification. In FIG. 2, 2 is a brazing material, 3 is a solvent, 4 is a tube, and 5 is a sleeve.
第２図は、母材にニツケル基合金、ろうに金ろ
う（BAu−４）を用いて行つた事例であるが、
母材とろうは十分にぬれており、Li2B4O7が溶剤
として十分働いていることが分る。 Figure 2 shows an example using a nickel-based alloy as the base material and gold solder (BAu-4) as the solder.
It can be seen that the base metal and wax are sufficiently wet, and Li 2 B 4 O 7 is working well as a solvent.
第１図は、溶剤にLi2B4O7を用いた時の金ろう
の広がり試験結果を示し、第２図は、実際に
Li2B4O7を溶剤として用いた場合のろう付断面に
おける金属組織の顕微鏡写真である。
Figure 1 shows the spread test results of gold solder using Li 2 B 4 O 7 as the solvent, and Figure 2 shows the actual results.
1 is a micrograph of a metal structure in a brazed cross section when Li 2 B 4 O 7 is used as a solvent.
Claims (1)
ムが添加されている一次系水で使用される機器、
部品のろう付にあたり、Li2B4O7単独を溶剤とし
て用いて金ろうのろう材でろう付を行うことを特
徴とする原子力プラント一次系水部材のろう付方
法。1. Equipment used in primary water of nuclear power plants to which boric acid and lithium hydroxide are added;
A method for brazing water components in a primary system of a nuclear power plant, characterized in that parts are brazed with a gold brazing filler metal using Li 2 B 4 O 7 alone as a solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6115984A JPS60206600A (en) | 1984-03-30 | 1984-03-30 | Brazing method of member for primary system water of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6115984A JPS60206600A (en) | 1984-03-30 | 1984-03-30 | Brazing method of member for primary system water of nuclear power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60206600A JPS60206600A (en) | 1985-10-18 |
| JPH0454559B2 true JPH0454559B2 (en) | 1992-08-31 |
Family
ID=13163078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6115984A Granted JPS60206600A (en) | 1984-03-30 | 1984-03-30 | Brazing method of member for primary system water of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60206600A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2616259B1 (en) * | 1987-06-02 | 1993-11-12 | Electricite De France | METHOD AND DEVICE FOR MEASURING THE LITHIUM CONCENTRATION IN THE PRIMARY COOLING CIRCUIT OF A NUCLEAR REACTOR |
| US10703879B2 (en) | 2014-12-30 | 2020-07-07 | The Boeing Company | Process and formulation to join ceramic forms while maintaining structural and physical characteristics across the bond surface |
-
1984
- 1984-03-30 JP JP6115984A patent/JPS60206600A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60206600A (en) | 1985-10-18 |
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