JPH02182854A - Valve for light water reactor piping - Google Patents
Valve for light water reactor pipingInfo
- Publication number
- JPH02182854A JPH02182854A JP64000321A JP32189A JPH02182854A JP H02182854 A JPH02182854 A JP H02182854A JP 64000321 A JP64000321 A JP 64000321A JP 32189 A JP32189 A JP 32189A JP H02182854 A JPH02182854 A JP H02182854A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- alloy
- valve seat
- light water
- water reactor
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 51
- 239000000956 alloy Substances 0.000 claims abstract description 51
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000005219 brazing Methods 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 11
- 229910052804 chromium Inorganic materials 0.000 abstract description 3
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 1
- 229910000990 Ni alloy Inorganic materials 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 238000005299 abrasion Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 5
- 239000006210 lotion Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004881 precipitation hardening Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910019590 Cr-N Inorganic materials 0.000 description 1
- 229910019588 Cr—N Inorganic materials 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 229910003296 Ni-Mo Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Landscapes
- Sliding Valves (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、軽水炉配管用弁に係り、特に、耐摩耗及び耐
二ローション性に優れた弁に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a valve for light water reactor piping, and particularly to a valve with excellent wear resistance and lotion resistance.
従来の装置は、特開昭６２−１８３７号公報に記載のよ
うに、弁座表面がＣｒ−Ｎｉ−Ｆｅ系の鉄基析出硬化型
合金からなり、肉盛溶接後に高温での熱処理により析出
硬化させて硬さを保って、摩耗性を向上させている。し
かし、析出硬化熱処理による肉盛溶接部の割れ発生の恐
れがある事に対して考慮されていない。本発明は、化学
組成を変えることにより、析出硬化熱処理をせずに、耐
摩耗性、及び、耐腐食性に優れた弁座製作を可能にした
。As described in JP-A-62-1837, the conventional device has a valve seat surface made of a Cr-Ni-Fe iron-based precipitation hardening alloy, which is precipitation hardened by heat treatment at a high temperature after overlay welding. This maintains hardness and improves abrasion resistance. However, no consideration is given to the possibility that cracks may occur in the overlay weld due to precipitation hardening heat treatment. The present invention has made it possible to manufacture a valve seat with excellent wear resistance and corrosion resistance without the need for precipitation hardening heat treatment by changing the chemical composition.
従来の軽水炉配管用弁は、耐摩耗性、及び、耐重ローシ
ョン性を付与するためにＣｏ基合金が肉盛溶接されてい
る。Conventional valves for light water reactor piping are welded with a Co-based alloy overlay to provide wear resistance and heavy lotion resistance.
しかし、Ｃｏ基合金は軽水炉の高温高圧水、あるいは、
蒸気の高速流体に接しているので、二ローションによっ
てＣＯが炉水中に溶出し、また、金属同士の摩耗によっ
てＣｏが炉水中に混入する。However, Co-based alloys are used in high-temperature, high-pressure water of light water reactors,
Since it is in contact with a high-velocity fluid of steam, CO is eluted into the reactor water by the two lotions, and Co is mixed into the reactor water due to metal-to-metal abrasion.
これらのＣｏは炉心に入り６°ＣＯとなり、配管。These Co enters the reactor core and becomes 6° CO, which leads to piping.
タービン、その他の機器に循環、付着し、軽水炉プラン
ト全体の放射能を上げるという欠点がある。It has the disadvantage that it circulates and adheres to turbines and other equipment, increasing the radioactivity of the entire light water reactor plant.
本発明の目的は、肉盛溶接材にＣＯを含まない合金を使
用し、耐重ローション、及び、耐摩耗性に優れた弁体弁
座、及び、弁箱弁座を提供することにある。An object of the present invention is to provide a heavy-duty lotion, a valve body valve seat, and a valve body valve seat that use an alloy that does not contain CO as a build-up welding material and have excellent wear resistance.
上記目的は、Ｃｏを用いることなく、Ｃｏ基合金と同等
の耐エロージヨン、及び、耐摩耗を得ることができるか
と研究開発を進めた。For the above purpose, we conducted research and development to see if it would be possible to obtain erosion resistance and wear resistance equivalent to those of Co-based alloys without using Co.
摺動時に接触する弁座同士が同種系の材料であれば摩耗
量が多く、摩耗面の表面粗さも大になる。If the valve seats that come into contact with each other during sliding are made of the same type of material, the amount of wear will be large and the surface roughness of the worn surfaces will also be large.
従って、異種材系の材料を弁座に用いることによりＣｏ
基合金を用いることなくＣｏ基合金同等の特性が得られ
る事を実験上判明し、本発明に至った。Therefore, by using different materials for the valve seat, Co
It was experimentally found that properties equivalent to Co-based alloys can be obtained without using a base alloy, leading to the present invention.
本発明は、弁体弁座、あるいは、弁箱弁座の一方の弁座
表面がＣｒ−Ｎｉ−Ｍｏ−Ｆｅ系のＦｅ基からなり、他
の方の弁座表面をＮｉ基合金にすることを特徴とする弁
である。耐腐食及び耐摩耗性の良好なＣｒ−Ｎｉ−Ｍｏ
−Ｆｅ系Ｆｅ基合金と、耐腐食、及び、耐摩耗性の良好
なＮｉ基合金とを組合せることにより、耐腐食及び耐摩
耗性に優れた弁が得られる。The present invention provides that one valve seat surface of the valve body valve seat or the valve body valve seat is made of a Fe-based Cr-Ni-Mo-Fe system, and the other valve seat surface is made of a Ni-based alloy. This valve is characterized by: Cr-Ni-Mo with good corrosion and wear resistance
By combining a -Fe-based Fe-based alloy and a Ni-based alloy that has good corrosion resistance and wear resistance, a valve with excellent corrosion resistance and wear resistance can be obtained.
本発明に用いたＣ ｒ −Ｎ ｉ −Ｍ ｏ −Ｆ ｅ
系のＦｅ基合金はオーステナイトステンレス鋼である。C r -N i -Mo -F e used in the present invention
The Fe-based alloy of the series is austenitic stainless steel.
特に、重量比でＣｒ２０〜３０％、Ｎｉ１０〜２５％、
Ｍｏ５〜１５％、Ｗｌ〜５％、Ｃ１，Ｑ以下及び残部Ｆ
ｅの組成をもつＦｅ基合金で、耐腐食、及び、耐摩耗共
に優れているため、本発明の弁座に用いるのに好適であ
る。Ｃｒは耐腐食性向上のため必須であり、２０％以上
は必要である。In particular, 20 to 30% Cr, 10 to 25% Ni by weight,
Mo5~15%, Wl~5%, C1, Q and below and balance F
It is an Fe-based alloy having a composition of e, and has excellent corrosion resistance and wear resistance, so it is suitable for use in the valve seat of the present invention. Cr is essential for improving corrosion resistance, and 20% or more is required.
しかし、多量の含有はフェライトの生成を促し、硬度を
低下させるため３０％以下とする。好ましくは２５〜２
８％である。Ｎｉはフェライトの生成を抑制するために
、１０％以上の添加は必要である。However, since a large amount of content promotes the formation of ferrite and reduces hardness, the content is limited to 30% or less. Preferably 25-2
It is 8%. Ni needs to be added in an amount of 10% or more in order to suppress the formation of ferrite.
しかし、多量の含有はオーステナイトの生成を促し、強
度が不足するため、２５％以下とする事が望ましい、好
ましくは、１５〜２０％である。However, if the content is too large, it will promote the formation of austenite and the strength will be insufficient, so it is desirable that the content be 25% or less, preferably 15 to 20%.
Ｍｏは耐腐食性及び耐摩耗性を一反向上させるために必
要であるが過剰の添加は靭性を害するので５〜１０％と
する。好ましくは８〜９％である。Mo is necessary to improve corrosion resistance and wear resistance, but excessive addition impairs toughness, so the content is set at 5 to 10%. Preferably it is 8 to 9%.
Ｗは合金の硬さを向上させるために必要であるが過剰な
添加は靭性を害することから１〜５％とする。好ましく
は１．５〜２．５％である。Ｃは強度を向上させフェラ
イトの成牛を抑制する成分である。多量の含有は耐腐食
性、及び、延性を害することから１．０以下とする。好
ましくは０．２〜０．４％である。W is necessary to improve the hardness of the alloy, but excessive addition impairs toughness, so it is limited to 1 to 5%. Preferably it is 1.5 to 2.5%. C is a component that improves strength and suppresses ferrite growth. Since a large amount of content impairs corrosion resistance and ductility, the content should be 1.0 or less. Preferably it is 0.2 to 0.4%.
他方のＮｉ基合金はＮｉ−Ｃｒ−Ｂ−Ｓｉ −Ｃ−Ｗ−
Ｆｅ系で耐腐食、及び、耐重ローション性が優れた肉盛
合金として使用されている。上記のＦｅ基合金と組合わ
せると耐摩耗性が良好となる。The other Ni-based alloy is Ni-Cr-B-Si -C-W-
It is Fe-based and is used as a build-up alloy with excellent corrosion resistance and heavy lotion resistance. When combined with the above-mentioned Fe-based alloy, the wear resistance becomes good.
特に、Ｃｒ ７〜１５％、８０．２〜１．０％。In particular, Cr 7-15%, 80.2-1.0%.
Ｓｉ３〜７％、Ｃ０，７〜１．２％、Ｆｅ２〜５％。Si3-7%, C0.7-1.2%, Fe2-5%.
Ｗ１６５〜２．５％で残部Ｎｉの組成をもつＮｉ基合金
である。It is a Ni-based alloy having a composition of 165 to 2.5% W and the balance being Ni.
Ｃｒは耐腐食性向上のための必須な元素である。Cr is an essential element for improving corrosion resistance.
最低５％を必要とするが、Ｃｒの含有量が１５％を超え
ると、Ｂ及びＣとの間に金属間化合物を形成し合金の靭
性を低下する。好ましくは、９〜１１％である。Ｂは高
硬度の金属間化合物を形成し合金中に析出し、合金の硬
さを向上させると共に、肉盛溶接性を改善する働きをす
る。０．２％以下にすると肉盛溶接性が害になる。１．
０％以上にすると合金の靭性が低下する。好ましくは、
０．４〜０．５％が良い。Although a minimum Cr content of 5% is required, if the Cr content exceeds 15%, an intermetallic compound is formed between B and C, reducing the toughness of the alloy. Preferably it is 9 to 11%. B forms a highly hard intermetallic compound and precipitates in the alloy, and functions to improve the hardness of the alloy and the overlay weldability. If it is less than 0.2%, overlay weldability will be impaired. 1.
If it exceeds 0%, the toughness of the alloy will decrease. Preferably,
0.4 to 0.5% is good.
ＳｉはＢと同じ働きをする。Ｓｉ３％以下にすると肉盛
溶接性が害になる。、７％以上にすると合金の靭性が低
下する。好ましくは５〜６％が良い。Si has the same function as B. If the Si content is less than 3%, overlay weldability will be impaired. , if it exceeds 7%, the toughness of the alloy will decrease. Preferably it is 5 to 6%.
Ｃは合金の硬さを向上させる働きをするが、Ｃの含有量
が０．７％以下では硬さが低下し、１．２％以上になる
と合金の靭性を低下させる。好ましくは、０．９〜１．
１％である。C functions to improve the hardness of the alloy, but if the C content is 0.7% or less, the hardness decreases, and if it is 1.2% or more, the toughness of the alloy decreases. Preferably 0.9 to 1.
It is 1%.
ＦｅはＮｉ基合金に添加し、溶接性を向上させる。Fe is added to Ni-based alloys to improve weldability.
好ましくは、２〜３％が良い。Ｗは合金の基質部に分散
し、硬さを向上させる働きをするが、Ｗの含有量が２．
５％ を超えると、合金の靭性を低下させる。好ましく
は２．０％である。Preferably, 2 to 3% is good. W is dispersed in the matrix of the alloy and works to improve the hardness, but if the W content is 2.
If it exceeds 5%, the toughness of the alloy decreases. Preferably it is 2.0%.
このようなＣｒ Ｎｉ−Ｍｏ−Ｆｅ系のＦｅ基合金及
びＮｉ基合金は、例えば、弁箱弁座及び弁体弁座の表面
に肉盛溶接、ロー付、拡散接合、及び、ねじ止めでも良
く、弁箱弁座と弁体弁座の摺動面が前述の合金から構成
されていれば良い。Such Cr Ni-Mo-Fe-based Fe-based alloys and Ni-based alloys may be applied, for example, to the surfaces of the valve body valve seat and the valve body valve seat by overlay welding, brazing, diffusion bonding, or screwing. It is sufficient that the sliding surfaces of the valve body valve seat and the valve body valve seat are made of the above-mentioned alloy.
以下、本発明の実施例を示す。 Examples of the present invention will be shown below.
第１表に供試材合金の化学組成を示す。Table 1 shows the chemical composition of the sample alloy.
Ｎα１〜Ｎα７は高周波真空溶解炉を用いて溶解後ガス
アトマイズ法により供試材合金の化学組成の粉末を製造
した。粉末の粒径は一７０／＋２５０メシュのものであ
る。その粉末を用いてプラズマ粉体肉盛溶接法で５ＵＳ
３０４板材の上に二層、肉盛溶接を行った物から摩耗試
験片を採取した。摩耗条件は、面圧２５，５０，７５及
び１００Ｋｇ／ｃｓｌとし。For Nα1 to Nα7, powders having the chemical composition of the test material alloys were manufactured by a gas atomization method after melting using a high frequency vacuum melting furnace. The particle size of the powder is -70/+250 mesh. Using the powder, 5US was produced using the plasma powder overlay welding method.
Abrasion test pieces were taken from a 304 plate with two layers of overlay welding applied. The wear conditions were surface pressures of 25, 50, 75, and 100 kg/csl.
摩耗速度３ 、１ ｍ ／ｌｌｌ１ｎ、摩耗時間は０．
５ ｈ で水中で行い、摩耗体積域（ｄ）、及び、摩
耗面の粗さを測定した。第１図に摩耗体積域を示す。第
１図により明らかなように、本発明のＣｒ −Ｎ ｉ
−Ｍ ｏ −Ｆ ｅ系のＦｅ基合金、及び、Ｎｉ−Ｃｒ
−Ｂ−５ｉ−Ｃ−Ｗ−Ｆｅ系のＮｉ基合金である翫１と
Ｎａ２の組合せが、ＮＧ２とＮａ ３及びＮｎ ４とＮ
（Ｌ ６の組合せよりも優れていることを確認された。Wear rate: 3.1 m/lll1n, wear time: 0.
The test was carried out in water for 5 hours, and the wear volume area (d) and the roughness of the wear surface were measured. Figure 1 shows the wear volume area. As is clear from FIG. 1, the Cr-N i of the present invention
-Mo-Fe-based Fe-based alloy and Ni-Cr
-B-5i-C-W-Fe-based Ni-based alloys 1 and Na2 have a combination of NG2 and Na3 and Nn4 and N
(It was confirmed that it was superior to the combination of L 6.
第２図は弁のシール性の生命である表面粗さを示す。Figure 2 shows surface roughness, which is the key to a valve's sealing performance.
第２図で明らかなように１本発明の組合せＮＱ１．及び
、Ｎα２の方が優れている事を確認した。As is clear from FIG. 2, combination NQ1. of the present invention. It was also confirmed that Nα2 is superior.
次に、上記試料Ｎα１．２，３，４，６．７の合金を用
いて第２表に示す組合せで第３図に示す４Ｂ管用弁を製
作し、高温高圧水中で弁の開閉作動試験をし、作動試験
の開閉の回数は１００回、面圧は２２５ Ｋｇ／ ｃＪ
とし、弁の気密性を確認した。Next, using the alloys of the above samples Nα1.2, 3, 4, and 6.7, a 4B pipe valve shown in FIG. However, the number of opening and closing operations in the operation test was 100 times, and the surface pressure was 225 Kg/cJ.
The airtightness of the valve was confirmed.
第 ２ 表
その結果を第２表に示す。第２表で明らかなように、弁
箱弁座にＮα２合金、弁体弁座にＮａ １の合金を使用
した弁は１００回の開閉試験で水漏れは確認されず、気
密性を保持した。一方、弁箱弁座にＮｏ２及びＮα４．
弁体弁座にＮα３及びＮａ ６は合金は、８０回及び６
５回で気密性は破壊された。比較材としてＣｏ基合金も
摩耗試験及び弁の開閉試験を行った。その結果本発明合
金の組合せと同等であることを確認した。Table 2 The results are shown in Table 2. As is clear from Table 2, the valve using the Na2 alloy for the valve box valve seat and the Na1 alloy for the valve body valve seat maintained airtightness with no water leakage observed in 100 opening/closing tests. On the other hand, No.2 and No.4 on the valve seat of the valve box.
The alloys of Nα3 and Na6 on the valve body valve seat are 80 times and 6
The airtightness was destroyed after five attempts. As a comparison material, a Co-based alloy was also subjected to wear tests and valve opening/closing tests. As a result, it was confirmed that the combination was equivalent to the combination of the alloys of the present invention.
以上の結果、従来弁座に使用されているＣｏ基合金を用
いた物と本発明合金組合せ弁と同等である事を確認した
。The above results confirmed that the alloy combination valve of the present invention is equivalent to the valve seat using a Co-based alloy conventionally used for the valve seat.
本発明によれば、軽水炉配管、及び、配管に接続されて
いる四辺機器の放射線を従来の半分以下におさえる事が
でき、定期検査時の作業時間を大幅に確保でき、より安
全な原子カプラントを製造することができる。According to the present invention, it is possible to reduce the radiation of light water reactor piping and the equipment on all sides connected to the piping to less than half of the conventional level, and it is possible to significantly save work time during periodic inspections, resulting in a safer nuclear couplant. can be manufactured.
第１図は本発明の一実施例の摩耗試験結果で体積域と摩
耗面圧の関係を示す図、第２図は摩耗試験結果で表面粗
さと摩耗面圧の関係を示す図、第３図は仕切弁の断面図
を示す。
１・・・ハンドル、２・・ボンネット、３・・・弁棒、
４・・・弁箱、５・・・弁体弁座、６・・・弁体、７・
・・弁箱弁座。
多 １ 区
第 ２１￥１
４表のＬ−一
摩遺邑旬厘（勺シ′Ｃが９Fig. 1 is a diagram showing the relationship between volume area and abrasion surface pressure based on the wear test results of one embodiment of the present invention, Fig. 2 is a diagram showing the relationship between surface roughness and abrasion surface pressure in the abrasion test result, and Fig. 3 is a diagram showing the relationship between surface roughness and abrasion surface pressure in the abrasion test result. shows a cross-sectional view of the gate valve. 1... Handle, 2... Bonnet, 3... Valve stem,
4... Valve box, 5... Valve body valve seat, 6... Valve body, 7...
...Bent box valve seat. Ta 1 Ward No. 21￥1 Table 4 L-Ichima Imura Shunrin (勺し'C is 9
Claims (1)
一方の弁座表面がＣｒ−Ｎｉ−Ｍｏ−Ｆｅ系のＦｅ基か
らなり、他方の弁座表面がＮｉ−Ｃｒ−Ｂ−Ｓｉ−Ｃ−
Ｗ−Ｆｅ系のＮｉ基合金の組合せからなることを特徴と
する軽水炉配管用弁。 ２、特許請求項第１項のＦｅ基合金は重量比でＣｒ２０
〜３０％、Ｎｉ１０〜２５％、Ｍｏ５〜１５％、Ｗ１〜
５％、Ｃ１．０％以下、及び残部Ｆｅの化学組成をもつ
ことを特徴とする軽水炉配管用弁。 ３、特許請求項第１項のＮｉ基合金は重量比でＣｒ７〜
１５％、Ｂ０．２〜１．０％、Ｓｉ３〜７％、Ｆｅ２〜
５％、Ｗ１．５〜２．５％、Ｃ０．７〜１．２％及び残
部Ｎｉの化学組成をもつことを特徴とする軽水炉配管用
弁。 ４、特許請求項第１項のＦｅ基合金は重量比でＣｒ２０
〜３０％、Ｎｉ１０〜２５％、Ｍｏ５〜１５％、Ｗ１〜
５％、Ｃ１．０％以下及び残部Ｆｅ、Ｎｉ基合金は重量
比でＣｒ７〜１５％、Ｂ０．２〜１．０％、Ｓｉ；３〜
７％、Ｆｅ２〜５％、Ｗ１．５〜２．５％、Ｃ；０．７
〜１．２％及び残部Ｎｉの化学組成をもち、溶接、ロー
付及び拡散接合で弁座を形成することを特徴とする軽水
炉配管用弁。[Scope of Claims] 1. One valve seat surface of the valve body valve seat or valve body valve seat of a light water reactor piping valve is made of a Cr-Ni-Mo-Fe system Fe group, and the other valve seat surface is Ni-Cr-B-Si-C-
A valve for light water reactor piping, characterized in that it is made of a combination of a W-Fe-based Ni-based alloy. 2. The Fe-based alloy of claim 1 has a weight ratio of Cr20
~30%, Ni10~25%, Mo5~15%, W1~
A light water reactor piping valve characterized by having a chemical composition of 5% C, 1.0% or less of C, and the balance Fe. 3. The Ni-based alloy according to claim 1 has a weight ratio of Cr7 to
15%, B0.2-1.0%, Si3-7%, Fe2-
A light water reactor piping valve having a chemical composition of 5% W, 1.5 to 2.5% W, 0.7 to 1.2% C, and the balance Ni. 4. The Fe-based alloy according to claim 1 has a weight ratio of Cr20
~30%, Ni10~25%, Mo5~15%, W1~
5%, C1.0% or less and the balance Fe, Ni-based alloy has a weight ratio of Cr7 to 15%, B0.2 to 1.0%, Si; 3 to
7%, Fe2-5%, W1.5-2.5%, C; 0.7
1. A light water reactor piping valve having a chemical composition of ~1.2% Ni with the balance being Ni, and having a valve seat formed by welding, brazing, and diffusion bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP64000321A JPH02182854A (en) | 1989-01-06 | 1989-01-06 | Valve for light water reactor piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP64000321A JPH02182854A (en) | 1989-01-06 | 1989-01-06 | Valve for light water reactor piping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02182854A true JPH02182854A (en) | 1990-07-17 |
Family
ID=11470645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP64000321A Pending JPH02182854A (en) | 1989-01-06 | 1989-01-06 | Valve for light water reactor piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02182854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011013164A (en) * | 2009-07-03 | 2011-01-20 | Toshiba Corp | Scram valve of water pressure control unit |
-
1989
- 1989-01-06 JP JP64000321A patent/JPH02182854A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011013164A (en) * | 2009-07-03 | 2011-01-20 | Toshiba Corp | Scram valve of water pressure control unit |
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