JP3675463B2 - 配管系の熱処理方法 - Google Patents
配管系の熱処理方法 Download PDFInfo
- Publication number
- JP3675463B2 JP3675463B2 JP2003363991A JP2003363991A JP3675463B2 JP 3675463 B2 JP3675463 B2 JP 3675463B2 JP 2003363991 A JP2003363991 A JP 2003363991A JP 2003363991 A JP2003363991 A JP 2003363991A JP 3675463 B2 JP3675463 B2 JP 3675463B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- pipe
- stress
- stainless steel
- heating
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title claims description 95
- 238000000034 method Methods 0.000 title claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 21
- 229910052799 carbon Inorganic materials 0.000 claims description 21
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 15
- 239000002826 coolant Substances 0.000 claims description 15
- 239000000498 cooling water Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 description 23
- 230000007797 corrosion Effects 0.000 description 23
- 206010070834 Sensitisation Diseases 0.000 description 21
- 230000008313 sensitization Effects 0.000 description 21
- 239000000463 material Substances 0.000 description 20
- 229910001220 stainless steel Inorganic materials 0.000 description 20
- 239000010935 stainless steel Substances 0.000 description 19
- 238000005336 cracking Methods 0.000 description 18
- 238000003466 welding Methods 0.000 description 11
- 239000010963 304 stainless steel Substances 0.000 description 9
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 9
- 230000006698 induction Effects 0.000 description 7
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000011651 chromium Substances 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- -1 chromium carbides Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001235 sensitizing effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
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
- Heat Treatment Of Articles (AREA)
Description
0.03%の場合のそれぞれについて求めたものである。オーステナイト系ステンレス鋼の鋭敏化は、高温に曝されている間に耐食性を発揮しているクロム元素が炭素と結合してクロム炭化物を形成し、高温に曝された領域にクロム欠乏層が生じることにより発生する。したがって、材料中の炭素含有量が多いほど材料の鋭敏化は起き易くなる。図2より、例えばオーステナイト系ステンレス鋼が600℃に保持されているとき、炭素含有量が
0.08%であれば保持時間が1時間程度で鋭敏化が発生するのに対して、0.03%であれば、鋭敏化が発生するには10時間程度を要することがわかる。また、高温にさらされる時間が10時間よりも短い場合には、鋭敏化を起こさない。すなわち、配管の熱処理を行うときに、炭素含有量が高い配管では鋭敏化を抑制するために加熱温度に制限を設ける必要があるが、炭素含有量が低い配管では加熱時間が10時間に到達しなければ、鋭敏化をおこすことなく高温に曝すことができることを意味している。
316Lステンレス鋼では最高温度の制限は考慮しなくてよくなる利点がある。
℃としたときの方が深くまで圧縮応力を発生させることができる。すなわち、外面の最高加熱温度を高くすることにより内面側に付与する圧縮応力の絶対値を大きくする効果が生じている。
22…熱電対、23…ケーブル。
Claims (2)
- プラントの組立てられた後の炭素含有量が0.001%以上0.03%以下のオーステナイト系ステンレス鋼からなる配管系を構成する配管の内部を、冷却水を冷却材として用いて冷却し、前記配管の外部を、高周波加熱装置を用いて加熱温度の最大値を600℃以上700℃以下に加熱し、前記配管の内面と前記配管の外面との間に温度差を発生させ、前記内面を引張降伏させ、前記外面を圧縮降伏させる配管系の熱処理方法。
- 前記請求項1に記載の配管系の熱処理方法において、熱処理を行う配管は内面にき裂を有することを特徴とする配管系の熱処理方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003363991A JP3675463B2 (ja) | 2003-10-24 | 2003-10-24 | 配管系の熱処理方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003363991A JP3675463B2 (ja) | 2003-10-24 | 2003-10-24 | 配管系の熱処理方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005126771A JP2005126771A (ja) | 2005-05-19 |
JP3675463B2 true JP3675463B2 (ja) | 2005-07-27 |
Family
ID=34643112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003363991A Expired - Lifetime JP3675463B2 (ja) | 2003-10-24 | 2003-10-24 | 配管系の熱処理方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3675463B2 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5688352B2 (ja) * | 2011-09-19 | 2015-03-25 | 日立Geニュークリア・エナジー株式会社 | 配管の熱処理方法 |
-
2003
- 2003-10-24 JP JP2003363991A patent/JP3675463B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2005126771A (ja) | 2005-05-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4759302B2 (ja) | 熱処理方法及びその装置 | |
EP1927668B1 (en) | Restoration method for deteriorated part and restoration apparatus for deteriorated part | |
JP4599250B2 (ja) | 高周波誘導加熱時外面温度制御方法および当該制御装置 | |
JP3649223B2 (ja) | 配管系の熱処理方法および熱処理装置 | |
US4505763A (en) | Heat-treating method of weld portion of piping system and heating coil for the heat treatment | |
JP3675463B2 (ja) | 配管系の熱処理方法 | |
Natesan et al. | Preliminary materials selection issues for the next generation nuclear plant reactor pressure vessel. | |
JP5298081B2 (ja) | 配管の残留応力改善方法と、その施工管理方法 | |
JPS5817807B2 (ja) | 配管の熱処理方法 | |
JPS63112089A (ja) | 二重金属管等の残留応力改善方法 | |
JP2009287104A (ja) | オーステナイト系ステンレス鋼薄板及びその製造方法 | |
Thebault et al. | PWSCC of thermocoax pressurizer heaters in austenitic stainless steel and remedial actions to preventing SCC | |
Lee et al. | Assessment of possibility of primary water stress corrosion cracking occurrence based on residual stress analysis in pressurizer safety nozzle of nuclear power plant | |
JP4179254B2 (ja) | 高周波誘導加熱残留応力改善法及び高周波誘導コイル | |
JP4391992B2 (ja) | 原子炉構造物とその製造方法および補修方法 | |
JP2004154807A (ja) | 構造物の溶接方法および溶接支援システム | |
JPS5852428A (ja) | 軸の応力改善熱処理法 | |
Li et al. | Stress Generation in an Axle Shaft during Induction Hardening | |
JP2008019499A (ja) | 高周波誘導加熱応力緩和法 | |
Brumovsky | Embrittlement of reactor pressure vessels (RPVs) in WWER-type reactors | |
Rosborg | Corrosion problems in boiling water reactors and their remedies | |
Lee et al. | A study on weld residual stress relaxation by local post weld heat treatment for circumferential weld | |
KR101830532B1 (ko) | 원전 배관의 이종접합부 피더블유에스씨씨(pwscc) 저항성 개선을 위한 열처리 방법 | |
JP2005213618A (ja) | 構造物の表面改質方法及び表面改質装置 | |
Romanov et al. | High-Temperature Heat-Treatment of the Welded Joints of Du300 Austenitic Pipelines at 900° C |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050412 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050425 |
|
R151 | Written notification of patent or utility model registration |
Ref document number: 3675463 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080513 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090513 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100513 Year of fee payment: 5 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110513 Year of fee payment: 6 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110513 Year of fee payment: 6 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120513 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120513 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130513 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130513 Year of fee payment: 8 |
|
EXPY | Cancellation because of completion of term |