Dab tsi yog qhov txawv ntawm qhov sib txawv ntawm cov alloy C71500 thiab C70600?
Qhov tseem ceeb tshaj qhov sib txawv yog nyob rau hauv cov ntsiab lus nickel thiab hlau. Qhov no cuam tshuam ncaj qha rau kev ua haujlwm hauv ib puag ncig nruj.
| Element | C71500 (70/30) | C70600 (90/10) |
|---|---|---|
| Copper (Cu) | 65.0% – 70.0% | 86.5% min |
| Nickel (Ni) | 29.0% – 33.0% | 9.0% – 11.0% |
| Hlau (Fe) | 0.4% – 1.0% | 1.0% – 1.8% |
| Manganese (Mn) | 1.0% max | 1.0% max |
C71500muaj ntau dua nickel cov ntsiab lus → zoo dua tsis kam musimpingement nresthiab kev nyuaj siab corrosion cracking.
C70600muaj cov ntsiab lus hlau ntau dua → zoo dua raulocalized pittinghauv qab - dej hiav txwv ceev.
Cov ntsiab lus tseem ceeb:
C71500 yog qhov kev xaiv zoo dua rau siab - dej hiav txwv ceev lossis dej brackish nrog xuab zeb / silt. C70600 yog kev lag luam ntau dua rau qis dua - nrawm, dej hiav txwv huv dua.
Corrosion Resistance piv li cas nyob rau hauv tiag Marine Environments?
C70600 Corrosion Cwj Pwm
General corrosion tus nqi: <0.025 mm/year in clean seawater
Kev txwv:Yooj yim rau erosion-corrosion saum toj no3m / s khiav ceev
Qhov zoo tshaj plaws rau:Condensers, tshav kub exchangers, seawater piping nrog nruab nrab ntws
C71500 Corrosion Cwj Pwm
General corrosion tus nqi:Zoo ib yam li C70600 nyob rau hauv kev huv huv
Qhov zoo:Tau tuavmus txog 6 m / stsis muaj kev tiv thaiv zaj duab xis puas
Qhov zoo tshaj plaws rau: Siab -cov dej hiav txwv ceev ceev, kab hluav taws xob, nkoj hull li qub
Cov Alloy twg muaj zog dua tshuab rau siab -Pressure Systems?
| Khoom | C71500 | C70600 |
|---|---|---|
| Tensile zog (min) | 380 MPa (55 ksi) | 303 MPa (44 ksi) |
| Yield zog (0.5% ext) | 125 MPa (18 ksi) | 105 MPa (15 ksi) |
| Elongation (min) | 30% | 30% |
| Hardness (HRB) | ~75 | ~62 |
Koj puas tuaj yeem Weld C71500 rau C70600 hauv Tib Qhov System?
Yog, thiab nws yog ib qho kev coj ua. Tab sis koj yuav tsum ua raws li cov lus qhia tshwj xeeb muab tub lim hlau.
| Base hlau sib xyaw | Pom zoo Filler Hlau |
|---|---|
| C71500 rau C71500 | RN-67 (70/30 Cu-Ni) |
| C70600 rau C70600 | RN-67 or RN-60 (60/40 Cu-Ni) |
| C71500 rau C70600 | RN-67 (70/30 muab tub lim) |
Ib txwm siv cov hlau muab tub lim uas phim rau sab alloy siab dua (C71500). Tsis txhob siv cov tooj liab dawb lossis tooj dag.
Tom qab-weld heat treatment yogtsis xav tau, tab sis kom zoo shielding gas (100% argon) yog yuav tsum tau kom tsis txhob oxidation.
Koj Yuav Tsum Siv Txhua Qib Qhov twg?
Siv C70600 (90/10) thaum:
Kev khiav ceev tsis tu ncua hauv qab 3 m / s
Seawater yog huv si thiab tsis muaj abrasive hais
Nyiaj txiag yog qhov kev txwv tseem ceeb
Daim ntawv thov:Tsawg-lub siab dej hiav txwv txias, hluav taws xob hluav taws xob ntawm cov nkoj me
Siv C71500 (70/30) thaum:
Kev khiav ceev tshaj 3 m / s los yog sib tshuam / turbulent
Cov xuab zeb, silt, lossis khib nyiab muaj nyob hauv dej
Kub kub(mus txog 120℃/ 248℃F) xav tau
Daim ntawv thov:Fais fab nroj tsuag cov ntxaij vab tshaus, nkoj propeller ncej tes tsho, siab -ceev brine kab
Yuav Ua Li Cas Txog Tus Nqi thiab Muaj?
Tus nqi yog ib qho kev txhawj xeeb tshaj plaws ntawm cov neeg siv khoom.
C70600:Cov ntsiab lus nickel qis →15-20% pheej yig duaua c71500
C71500:Tus nqi npib tsib xee siab dua → kim dua, tab sis lub neej ntev dua hauv cov xwm txheej hnyav
Tshaj li 20-xyoo lub neej nyob hauv cov dej hiav txwv siab tshaj plaws, C71500 feem ntau tau qis dua tag nrho cov tswv cuab txawm tias tus nqi siab dua.
Muaj:
Ob qib yog dav muaj nyob rau hauv:
Seamless yeeb nkab (1/4 "mus rau 12" OD)
Welded yeeb nkab (txog 24 "OD)
U-khoov raj rau cov khoom siv hluav taws xob
FAQ
Q1: Kuv puas tuaj yeem siv C71500 rau qhov chaw ntawm C70600 yam tsis muaj kev tsim kho dua tshiab?
Yog, feem ntau.Sab nraud txoj kab uas hla thiab phab ntsa tuab yog zoo tib yam raws li ASTM B111. Txawm li cas los xij, koj yuav tsum xyuas cov flange siab ntsuas vim C71500 muaj zog dua tab sis tsis nruj dua.
Q2: Qib twg zoo dua rau siab -kub chav condensers?
C71500.Nws tuav tau zoo dua oxidation tsis kam thiab txhua yam muaj zog tshaj 100℃(212℃F). C70600 poob qee qhov kev tiv thaiv corrosion saum 80 degree.
Q3: Puas yog C71500 xav tau kev tiv thaiv cathodic hauv dej hiav txwv?
Tsis yog, tab sis nws tuaj yeem siv nrog nws.Ob qib yog resistant rau biofouling thiab galvanic corrosion, tab sis yog tias ua ke nrog cov hlau los yog stainless hlau, siv cov khoom siv cais lossis kev txi anodes.
Q4: Dab tsi yog qhov txawv ntawm ASTM B111 C71500 thiab C70600?
C71500 yog nruj dua nyob rau hauv ceev- txav, dej qias neeg; C70600 ua haujlwm zoo hauv qeeb, huv dej hiav txwv.Xav txog C71500 ua "hnyav dej hiav txwv" thiab C70600 ua "tus qauv marine."
Q5: Kuv yuav paub li cas yog tias kuv daim ntawv thov xav tau C71500?
Yog tias koj muaj pitting lossis yaig puas ntawm cov kav dej C70600 tom qab 2-3 xyoos, hloov mus rau C71500. Also, any system with pump discharge >3 m / s yuav tsum siv C71500.
Q6: Cov qib ob puas tuaj yeem siv rau cov dej haus hauv cov nkoj?
Yog lawm, ob qho tib si ua raws NSF / ANSI 61 rau cov dej haus.Tab sis C70600 muaj ntau dua vim tus nqi qis.
Q7: Dab tsi vuam tsis xws luag yog feem ntau thaum koom nrog C71500 rau C70600?
Tsis muaj fusion thiab porosity.Siv RN-67 muab tub lim, preheat rau 150℃siab tshaj plaws, thiab ntxuav sab nraub qaum nrog argon.
Q8: Puas yog ASTM B111 C71500 tooj liab nickel yeeb nkab tiv thaiv ammonia nres?
Tsis muaj.Zoo li tag nrho cov tooj liab alloys, tsis txhob sib cuag ncaj qha nrog siab -concentration ammonia. Siv cov hlau stainless rau kev pabcuam ammonia.
Q9: Puas yog C71500 sib nqus?
Me ntsis, tom qab vuam lossis ua haujlwm txias.Cov hlau- theem nplua nuj tuaj yeem ua cov hlau nplaum tsis muaj zog. Qhov no yog qhov qub thiab tsis cuam tshuam rau corrosion kuj.
Q10: Dab tsi yog qhov tsawg kawg nkaus khoov vojvoog rau C71500 seamless yeeb nkab?
3 x OD rau txias dabtsi yog khoov yam tsis muaj muab tub lim.Rau nruj radii hauv qab 3x OD, siv kub dabtsi yog khoov (600-700 degree) nrog xuab zeb sau.
Koj yuav tsum xaiv qhov twg?
Xaiv C70600 yog:
Ceev <3 m/s
Ntxuav dej hiav txwv los yog dej khov
Nyiaj txiag rhiab heev
Kub kub <80 degree
Xaiv C71500 yog:
Kev nrawm> 3 m / s lossis turbulent flow
Sand/silt tam sim no
Kub kub> 80 degree
High mechanical zog yuav tsum tau
Lub neej ntev ({0}} xyoo) nyob rau hauv cov dej hiav txwv hnyav
