Khoom nta
Exceptional tsis kam rau pitting corrosion thiab crevice corrosion (core kom zoo dua)
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm S31254 yog nws cov kev ua haujlwm zoo heev rau pitting thiab crevice corrosion. Lub synergistic nyhuv ntawm high chromium (19.5{19}}20.5%), siab molybdenum (6.0-7.0%), thiab siab nitrogen (0.18-0.22%) ua rau PREN tus nqi ntawm 42-45, ho ntau dua li ntawm 316L (≈25) thiab 904L (≈25) . Nyob rau hauv ib puag ncig hnyav xws li dej hiav txwv, cov tshuaj chloride, thiab acidic chloride media, S31254 tsim cov yeeb yaj kiab tsis tshua muaj zog, uas tiv thaiv kev pib thiab nthuav tawm ntawm pitting thiab crevice corrosion. Nws qhov tseem ceeb pitting kub (CPT) tuaj yeem ncav cuag 60 degree, deb tshaj li ntawm 316L (≈15 degree) thiab 2205 (≈35 degree). Nws tuaj yeem ua haujlwm ruaj khov rau lub sijhawm ntev yam tsis muaj pitting perforation nyob rau hauv cov dej hiav txwv tropical seawater thiab high-temperature concentrated chloride daws. Cov cuab yeej no ua rau nws xaiv cov khoom siv zoo tshaj plaws rau huab cua chloride ib puag ncig xws li offshore platforms, seawater desalination, thiab heat exchangers.
Zoo heev kev nyuaj siab corrosion cracking kuj
Cov ntsiab lus siab npib tsib xee (17.5-18.5%) thiab tag nrho austenitic microstructure ntawm S31254 tso cai rau nws muaj kev tiv thaiv zoo heev rau kev ntxhov siab corrosion cracking (SCC) hauv chloride-muaj ib puag ncig. Cov pa austenitic stainless hlau xws li 304L thiab 316L yog qhov cuam tshuam rau intergranular SCC hauv cov tshuaj chlorinated aqueous saum 60 degree. Hauv qhov sib piv, S31254 nthuav tawm qhov zoo tshaj SCC tsis kam rau 316L thiab 304L txawm tias nyob rau hauv siab -kev ntxhov siab, kub-kub chloride tej yam kev mob. Nrog rau PREN siab dua (Ntau dua lossis sib npaug rau 42), nws muab kev pabcuam txuas ntxiv rau hauv cov ntawv thov uas muaj cov tshuaj chloride ions thiab kev ntxhov siab sib koom ua ke, ua rau nws xaiv cov khoom siv zoo tagnrho rau cov xwm txheej uas muaj cov tshuaj chlorine thiab kev ntxhov siab, xws li offshore platforms, cov khoom siv roj thiab roj, thiab cov nroj tsuag tshuaj.
Zoo heev tiv thaiv corrosion los ntawm kev txo cov acids thiab organic acids
Lub siab molybdenum thiab tooj liab cov ntsiab lus ntawm S31254 endows nws nrog zoo corrosion kuj nyob rau hauv txo acidic media. Hauv kev tshaj tawm xws li sulfuric acid (concentration Tsawg dua lossis sib npaug li 40%), phosphoric acid, formic acid, thiab acetic acid, corrosion resistance ntawm S31254 yog deb tshaj li ntawm 316L thiab 317L, thiab mus los yog txawm mus txog qib ntawm ib co nickel-raws li alloys. Qhov sib ntxiv ntawm tooj liab ntxiv txhim kho nws txoj kev muaj peev xwm passivation hauv uas tsis yog -oxidizing acids. Cov cuab yeej no ua rau nws xaiv cov khoom siv zoo tshaj plaws rau kev siv cov organic thiab txo cov kua qaub, xws li kev ua tshuaj lom neeg, tshuaj, thiab tshuaj tua kab mob.
Zoo machining thiab vuam zog
S31254 tuaj yeem ua haujlwm kub thiab txias, ua kom muaj ntau yam txheej txheem xws li forging, kub dov, txias dov, stamping, thiab dabtsi yog khoov. Piv nrog rau ferritic thiab duplex stainless hlau, nws cov austenitic microstructure tag nrho ua rau nws ntau formable thiab weld- tus phooj ywg, nrog ib tug nruab nrab ua hauj lwm hardening tus nqi. Nws tuaj yeem koom nrog siv ntau txoj kev vuam xws li TIG, MIG, SMAW, thiab SAW. Thaum vuam, nws raug nquahu kom siv cov ntaub ntawv sib txuam xws li ER254 SMO lossis ERNiCrMo-3 txhawm rau tiv thaiv kom tsis txhob muaj corrosion nyob rau hauv qhov chaw vuam. Tom qab-weld kev kho cua sov feem ntau tsis tas yuav tsum tau, tab sis pickling los yog passivation yog pom zoo kom rov qab corrosion kuj.
Kev qaug zog zoo heev
S31254 nthuav tawm kev qaug zog zoo heev. Nws ua ke ntawm lub zog siab thiab zoo toughness ua rau nws ua tau zoo heev nyob rau hauv cyclic loading tej yam kev mob. Nyob rau hauv dej hiav txwv thiab chloride ib puag ncig, nws qaug zog tawg kev loj hlob kuj yog superior rau cov pa austenitic stainless hlau thiab duplex stainless hlau. Nws yog tsim rau cov khoom uas raug hloov pauv xws li cov khoom siv hauv hiav txwv, cov twj tso kua mis, thiab cov impellers.
Cov khoom kub ua haujlwm zoo
S31254 tuaj yeem ua haujlwm kub zoo ntawm qhov kub siab. Qhov kev pom zoo kub ua haujlwm kub yog 1150-1200 degree, thiab kev kho tshuaj (kwv yees li 1100-1150 degree) yog xav tau tom qab ua haujlwm kub kom ua tau zoo corrosion kuj thiab txhua yam khoom. Vim nws cov ntsiab lus molybdenum siab, kev tswj qhov kub thiab txias thaum lub sijhawm ua haujlwm kub yog qhov tseem ceeb rau cov hlau no, kom tsis txhob nyob ntev ntawm qhov kub thiab txias (600-1000 degree) los tiv thaiv σ-theem nag lossis daus.
Technical Specifications
Tshuaj muaj pes tsawg leeg (ASTM A240 / UNS S31254)
|
Lub ntsiab |
Cov Lus Qhia Tshwj Xeeb (ASTM B348 / ASME SB-348) |
Sau ntawv |
|
Cr |
19.5 - 20.5% |
Cov ntsiab lus tseem ceeb tsim cov zaj duab xis tuab tuab, muab kev tiv thaiv corrosion |
|
Ni |
17.5 - 18.5% |
Austenite stabilizing cov ntsiab lus uas txhim kho toughness thiab kev nyuaj siab corrosion cracking kuj, kom ntseeg tau microstructural stability |
|
Mo |
6.0 - 7.0% |
Txhim khu kev tiv thaiv rau pitting thiab crevice corrosion los ntawm kwv yees li peb zaug ntawm chromium |
|
N |
0.18 - 0.22% |
Muaj zog austenite- tsim cov ntsiab lus, cov tshuaj muaj zog ntxiv, txhim kho pitting corrosion kuj thiab yield zog |
|
Cu |
0.5 - 1.0% |
Txhim kho corrosion kuj hauv kev txo cov kua qaub (xws li sulfuric acid) |
|
Mn |
Tsawg dua lossis sib npaug li 1.0% |
Deoxidizer, ntxiv rau me me |
|
Si |
Tsawg dua lossis sib npaug li 0.80% |
Deoxidizer, tswj nruj heev |
|
C |
Tsawg dua lossis sib npaug li 0.020% |
Kev tswj nruj nruj, Tiv thaiv carbide nag lossis daus los ntawm impairing corrosion kuj |
|
P |
Tsawg dua lossis sib npaug li 0.030% |
Deoxidizer, tswj nruj heev |
|
S |
Tsawg dua lossis sib npaug li 0.010% |
Deoxidizer, tswj nruj heev |
|
Fe |
Cov khoom seem (≈ 52%) |
Matrix element |
Lub cev muaj zog
|
Khoom |
Tus nqi / Ntau |
Kev Xeem |
|
Qhov ntom |
4.48 g / cm³ |
Chav ntsuas kub (20 degree) |
|
Melting Point |
≈ 1640 degree |
- |
|
Thermal conductivity |
≈ 8.7 W/(m·K) |
Chav ntsuas kub |
|
Kev tiv thaiv |
≈ 1.60 μΩ·m |
Chav ntsuas kub |
|
Coefficient ntawm thermal expansion (20-100 degree) |
9.2 × 10⁻⁶ /K |
- |
|
Elastic Modulus (Young's Modulus) |
Qhov siab tshaj plaws ntawm qhov siab tshaj plaws yog 115 GPa |
Chav ntsuas kub |
|
Poisson tus ratio |
≈ 0.31 |
Chav ntsuas kub |
Mechanical Properties (Annealed Condition, Type Values)
|
Khoom |
Tus nqi |
Specification |
|
Tensile zog |
Ntau dua lossis sib npaug li 825 MPa |
ASTM B 348 Cov Lus Qhia Tshwj Xeeb |
|
Lub zog (0.2% Offset) |
Ntau dua lossis sib npaug li 760 MPa |
ASTM B 348 Cov Lus Qhia Tshwj Xeeb |
|
Elongation (4D) |
Ntau dua lossis sib npaug li 12% |
ASTM B 348 Cov Lus Qhia Tshwj Xeeb |
|
Kev txo qis ntawm - ntu ntu |
Ntau dua lossis sib npaug li 25% |
- |
|
Hardness |
≈ 25–32 HRC |
- |
Lus Cim: Lub zog ntawm TA7 yog nyob nruab nrab ntawm kev lag luam ntshiab titanium (Gr2) thiab TC4 (Gr5), ua rau nws tsim nyog rau cov ntawv thov uas xav tau lub zog nruab nrab thiab xav tau siab rau weldability thiab qis -kub toughness.
Corrosion Resistance (Tswj tus nqi)
|
Nruab nrab |
Nco ntsoov |
Kub |
Corrosion tus nqi (mm / xyoo) |
Qib |
|
Dej hiav txwv |
- |
Chav tsev kub kom kub |
Tsis quav ntsej |
Zoo heev |
|
Atmospheric ib puag ncig |
- |
Chav ntsuas kub |
Tsis quav ntsej |
Zoo heev |
|
Nitric acid (HNO ₃) |
10% |
Chav ntsuas kub |
< 0.05 |
Zoo heev |
|
Sulfuric acid (H₂SO₄) |
5% |
Chav ntsuas kub |
< 0.1 |
Zoo |
|
Hydrochloric acid (HCl) |
3% |
Chav ntsuas kub |
< 0.1 |
Zoo |
|
Sodium hydroxide (NaOH) |
20% |
Chav ntsuas kub |
< 0.05 |
Zoo heev |
|
Organic acids (xws li formic acid, oxalic acid, thiab lwm yam) |
- |
Chav ntsuas kub |
< 0.1 |
Zoo |
Nco tseg: Kev tiv thaiv corrosion ntawm titanium alloys txo qis hauv siab -kub, siab -concentration acids. Thov muab cov kev ua haujlwm rau kev xaiv cov khoom tshwj xeeb thiab kev ntsuam xyuas.
High -kev ua haujlwm kub
TA7 nthuav tawm cov khoom siv kho tshuab ruaj khov tshaj qhov kub ntau yam:
|
Kub |
Tensile zog (MPa) |
Nco tseg |
|
Chav ntsuas kub |
Ntau dua lossis sib npaug rau 825 |
- |
|
200 degree |
≈ 700 |
Performance retention rate> 85% |
|
300 degree |
≈ 620 |
Performance retention rate> 75% |
|
400 degree |
≈ 540 |
Performance retention rate> 65% |
|
450 degree |
≈ 490 |
Performance retention rate> 59% |
Tsawg-kub txhua yam khoom
TA7 nthuav tawm cov yas zoo thiab toughness nyob rau hauv qis - qhov kub thiab txias:
|
Kub |
Tensile zog (MPa) |
Elongation (%) |
Nco tseg |
|
Chav ntsuas kub |
Ntau dua lossis sib npaug rau 825 |
Ntau dua lossis sib npaug li 12 |
- |
|
-78℃(Dry dej khov kub ) |
≈ 950 |
Ntau tshaj los yog sib npaug rau 10 |
Ua kom muaj zog, zoo ductility |
|
-196℃(kua nitrogen kub ) |
≈ 1100 |
Ntau dua lossis sib npaug li 8 |
Kev txhim kho tseem ceeb hauv lub zog, tsis muaj ductile - mus rau - nkig hloov |
|
-269℃(kua nitrogen kub ) |
≈ 1300 |
Ntau tshaj los yog sib npaug 6 |
Tseem tuav zoo plasticity |
Kev ruaj ntseg
TA7 yog ze rau - titanium alloy. Nyob rau hauv cov pa kub ntau ntawm kev siv, nws tsis muaj kev pheej hmoo ntawm kev hloov pauv theem, ruaj khov microstructure, thiab tsis raug kev txom nyem los ntawm kev kho cua sov ntxiv dag zog rau theem kev hloov pauv rhiab heev teeb meem uas + lossis titanium alloys ua. Nws nthuav tawm cov kev ua tau zoo sib xws thaum lub sijhawm ua haujlwm ntev -.
Siv tau Media
1. Huab cua ib puag ncig
2. Dej hiav txwv, dej ntsev
3. Nitric acid (tsawg concentration)
4. Alkaline daws xws li sodium hydroxide
5. Aviation kerosene, hydraulic roj
6. Cryogenic kua (kua nitrogen, kua oxygen, kua hydrogen)
7. Siab - qhov kub thiab txias ib puag ncig (tsawg dua lossis sib npaug li 450 degree)
Lus Cim: TA7 tsis muaj feem xyuam rau cov xov xwm corrosive xws li hydrofluoric acid (HF) thiab siab - kub concentrated hydrochloric acid uas tuaj yeem yaj cov titanium matrix.
Ti-5Al-2.5Sn (TA7, Gr6) yog tsim los ua kom tau raws li kev sib xyaw ua ke ntawm lub zog nruab nrab-kub thiab qhov kub thiab txias, thiab tau pom zoo siv rau hauv cov chaw hauv qab no:
Daim ntawv thov teb
-
Aerospace
Aero- cav casings, compressor hniav thiab disks, aircraft tawv, cav nacelle structural Cheebtsam, tshav kub shields, engine mounts, fasteners. -
Cryogenics
Cov kua dej hydrogen / kua oxygen cia tso tsheb hlau luam, cov kav dej cryogenic, cov roj liquefied natural gas (LNG) cia tso tsheb hlau luam thiab cov kav dej, cov khoom siv hlau nplaum superconducting, cov twj tso kua mis cryogenic thiab li qub. -
Tshuaj thiab Petrochemical
Nruab nrab-kub corrosion{1}}cov kav dej, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov twj thiab cov li qub, flanges thiab fasteners. -
Marine Engineering
Nkoj seawater system piping thiab li qub, sib sib zog nqus - cov khoom siv hauv hiav txwv, cov khoom siv hluav taws xob hauv dej hiav txwv. -
Automotive thiab Industrial
High -kev ua tau zoo ntawm lub tshuab tso pa, cov khoom siv cav, cov khoom siv turbocharger, cov tsheb sib tw ncaws pob thiab cov khoom siv. -
Khoom siv kho mob
Kev phais phais (tsis yog-load- cov kabmob), cov cuab yeej phais.
Kev xa khoom thiab Customization
Peb muab cov kev daws teeb meem yooj yim thiab txhim khu kev qha los xyuas kom meej tias koj tau txais TA7 (Gr6) cov ntaub ntawv uas phim koj qhov project xav tau.
|
Daim ntawv |
 Ntawv / phaj
|
 Bar / Qws
|
 Tube / Tube
|
 Sawb / Sheet Coil
|
 Hlau / Hlau Rod
|
|---|---|---|---|---|---|
|
Pauv ntau yam |
Thickness: 0.5 - 100 hli |
Txoj kab uas hla Φ6-500mm |
Sab nraud txoj kab uas hla Φ10-300mm |
Thickness: 0.05-3.0 hli |
Txoj kab uas hla Φ0.1-10mm |
|
Customization Muaj peev xwm |
Kub- dov los yog txias- dov daim hlau, ultra- cov ntawv nyias (pib ntawm 0.1mm), stamped qhov chaw, thiab txiav - mus rau - ntev txiav |
Forged bars, kub- dov bar, polished tuav, thiab zoo li tus tuav |
Seamless kav, welded kav, tsau -ntev txiav |
Precision strip cov ntaub ntawv, stamping coil Tshuag, laminated blanking, tsis yog - qauv dav |
Precision drawing, vuam muab tub lim, tshwj xeeb nto kho |
Vim li cas thiaj xaiv peb? - Txhim khu kev qha Engineering Technology. Dependable xa khoom.
Peb tsis yog ib tus neeg muag khoom xwb, tab sis yog ib tus neeg koom tes nrog cov ntaub ntawv ntseeg siab rau koj hauv Suav teb.
Vertically Integrated Production
Muaj 20,000㎡ qhov chaw nrog 10+ automated kab (8, 000+ tons / xyoo). Hauv - tsev cuab yeej & qhov chaw tuag ua rau muaj kev hloov kho sai thiab tswj tus nqi zoo - tsis muaj tus neeg nruab nrab kos npe.
Kev Tswjhwm nruj nruj ntawm txhua theem
Tag nrho traceability nyob rau hauv lub tseem ceeb QC checkpoints thoob plaws hauv ntau lawm . 100% raws li ASTM/ASME, EN, thiab GB qauv. Cov ntaub ntawv xeem cov ntaub ntawv muaj nyob nrog txhua qhov khoom xa tuaj.
Txhim khu kev xa khoom & Export ntim
10+ xyoo xa tawm mus rau Tebchaws Europe, North America, Southeast Asia & Middle East nrog cov dej tsis zoo thiab tiv thaiv- xeb, ua ke nrog cov kev xaiv thauj khoom yooj yim kom muaj kev nyab xeeb thiab nyob rau - lub sijhawm tuaj txog.
Qauv validation ua ntej pawg ntau lawm
Peb muab cov qauv dawb rau kev kuaj xyuas zoo, tso cai rau koj tso cov xaj xaj tsuas yog tom qab kev pom zoo. Peb xyuas kom meej qhov sib xws los ntawm cov qauv mus rau cov khoom loj los ntawm qhov ntsuas qhov tseeb thiab kev tsim pob tshab.
FAQ
Q: Qhov txawv ntawm TA7 (Gr6) thiab TC4 (Gr5) yog dab tsi?
Q: Qhov txawv ntawm TA7 (Gr6) thiab Gr2 (TA2) yog dab tsi?
Q: TA7 ua haujlwm li cas ntawm qhov kub thiab txias?
Q: Qhov kev ua tau zoo ntawm TA7 yog dab tsi? Puas yog yuav tsum tau kho tshwj xeeb?
Q: Qhov siab tshaj plaws ua haujlwm kub ntawm TA7 yog dab tsi?
Q: TA7 puas tuaj yeem hloov TC4?
Cim npe nrov: s31254, Tuam Tshoj s31254 manufacturers, lwm tus neeg, Hoobkas
