GNEE tshwj xeeb hauv kev muab cov kev daws teeb meem kub kub stainless hlau rau cov phiaj xwm kub hloov pauv thoob ntiaj teb. Nrog 18 xyoo ntawm kev tsim thiab xa tawm kev paub, thiab peb zaug ISO 9001/14001/45001 ntawv pov thawj, peb cov khoom ua raws li EN 10297-2, EN 10095 thiab ASTM cov qauv. Peb 1.4749 seamless raj yog tsim los tiv taus kub kub mus txog 1050 degree. Txhua lub raj tau dhau 100% PMI cov ntaub ntawv pov thawj, kuaj ultrasonic thiab kuaj hydrostatic, thiab xa nrog daim ntawv pov thawj EN thawj daim ntawv pov thawj 10204 3.1.
Peb 1.4749 stainless hlau raj rau cov khoom siv hluav taws xob yog tsim los ntawm kev kos duab txias, nrog rau sab nraud ntawm 8 mus rau 114.3 hli thiab phab ntsa tuab ntawm 1.0 txog 6.0 hli. Qhov loj me yog tswj tau meej (txoj kab uas hla ± 0.1 hli, phab ntsa tuab ± 0.08 hli) thiab ntev txog 12 m tuaj yeem tsim.
Txhua 1.4749 stainless hlau raj muaj cov ntsiab lus chromium ntawm 26.0 txog 29.0% thiab cov ntsiab lus nitrogen ntawm 0.15 txog 0.25%. Nws tuaj yeem ua haujlwm tsis tu ncua ntawm qhov kub txog li 1050℃thiab tsis tu ncua ntawm qhov kub txog li 1100 degree, nrog rau oxidation tus nqi tsawg dua 0.08 hli / xyoo ntawm 1000 degree. Nws cov khoom siv hluav taws xob hauv chav sov muaj xws li lub zog tensile ntawm 500 txog 700 MPa, lub zog tawm los ntau dua lossis sib npaug ntawm 280 MPa, thiab elongation ntau dua lossis sib npaug li 15%, ua rau nws tsim nyog rau cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob, boiler, thiab petrochemical daim ntaub ntawv.
SS 1.4749 Seamless Yeeb Nkab Specification
| Yam khoom | Kev piav qhia |
|---|---|
| Khoom naj npawb | 1.4749 |
| EN npe | X18CrN28 |
| Zoo sib xws | AISI 446 (kwv yees), UNS S44600 |
| Txoj cai | TS EN 10216-5 Seamless steel kav rau kev siv siab |
| Qauv | Ferritic stainless hlau |
| Daim ntawv thov tseem ceeb | Thaum tshav kub kub exchangers, recuperators, rauv qhov chaw, soot blowers |
| Cov txheej txheem tsim khoom | Txias los yog kub dov (seamless) |
| Sab nraud txoj kab uas hla (OD) | 6 hli - 219 hli (raug cua sov exchangers) |
| Phab ntsa thickness (EP) | 0.5 hli-20mm |
| Ua siab ntev | Raws li EN 10305-1 lossis EN ISO 1127 (D4 / T3 lossis D3 / T3) |
| Nto tiav | Annealed thiab pickled (dawb tiav) los yog ci annealed |
| Ntev | Ib leeg, ob npaug los yog ruaj khov ntev (txog 18 m) |
Chemical muaj pes tsawg leeg (feem ntau, %)
| Element | Cim | Yam tsawg kawg nkaus (%) | Qhov siab tshaj (%) |
|---|---|---|---|
| Cov pa roj carbon | c | - | 0.20 ib |
| Silicon | Yog lawm | - | 1.00 Nws |
| Manganese | mn | - | 1.00 Nws |
| Phosphorus | Q | - | 0.040 ib |
| Sulfur | Yog lawm | - | 0.015 ib |
| Chrome | Cr | 25.00 Nws | 28.00 Nws |
| Nitrogen | N | 0.15 | 0.25 |
Mechanical zog (ntawm chav tsev kub)
| Khoom | Tsim nyog |
|---|---|
| Tensile zog (Rm) | 500-700MPa |
| Elastic txwv (Rp0.2) | Ntau dua lossis sib npaug li 300 MPa |
| Elongation (A) | Ntau dua lossis sib npaug li 15% (ntev) |
| Brinell Hardness (HBW) | Tsawg dua lossis sib npaug rau 223 HBW |
Lub cev muaj zog
| Khoom | Tus nqi (ntawm 20 degree) |
|---|---|
| Qhov ntom | 7.6kg / m³ |
| Thermal conductivity | 17 W / (m K) |
| Modulus ntawm elasticity | 215 gp ua |
| Qhov nruab nrab coefficient ntawm thermal expansion (20-100 degree) | 10.5 × 10⁻⁶/K |
| tshwj xeeb kub | 500 J / (kg·K) |
Dab tsi yog qhov kev pabcuam siab tshaj plaws rau 1.4749 stainless hlau hauv huab cua?
Hauv oxidizing atmospheres (cua), 1.4749 stainless hlau tuaj yeem tiv taus oxidation txog 1100 degrees (2012 degrees F). Txawm li cas los xij, ntawm qhov ntsuas kub no, nws coj zoo li cov hlau tsis-load-cov kabmob kub-resistant. Vim nws qhov xwm txheej ferritic, nws cov creep kuj qis dua li ntawm austenitic steels ntawm tib qhov kub. Nws siv yog pom zoo nyob rau hauv qhov chaw uas thermal kuj, thiab tsis mechanical load, yog qhov tseem ceeb.
1.4749 stainless hlau raj puas tuaj yeem txias khoov rau hauv U raj?
Yog, tab sis nrog qee qhov kev txwv. Lub ductility ntawm 1.4749 stainless hlau (kwv yees li 15%) yog qis dua li ntawm 304/316 stainless hlau (kwv yees li 40%). Thaum khoov nrog lub vojvoog me me, nws yuav tsum tau preheat lub raj rau 200-300℃txhawm rau txhim kho ductility thiab tiv thaiv kev tawg. Tom qab lub zog txias khoov, annealing (kwv yees li 800-850 degrees) ua raws li qhov txias txias yog feem ntau pom zoo kom rov qab nws cov khoom.
Kev kuaj thiab tshuaj xyuas (Quality Guarantee)
| Hom kev xeem | Standard/Requirement |
|---|---|
| Visual thiab Dimensional | 100% kev soj ntsuam ntawm sab nraud (OD), phab ntsa thickness (EP) thiab ntev |
| Hydrostatic Test | Yuav tsum tau (tshwj tsis yog hloov los ntawm eddy tam sim no) |
| Eddy Tam sim no Test | Raws li EN ISO 10893-1 / ASTM E426 |
| Ultrasonic Test | Raws li EN ISO 10893-10 (yog tias xav tau) |
| Flaring / flattening | Los xyuas kom meej ductility thiab weld kev ncaj ncees |
| Loj Loj | Raws li ASTM E112 |
| Daim ntawv pov thawj | Hauv 10204 3.1 lossis 3.2 |
Ntim Cov Kev Xaiv
| Ntim Qib | Kev piav qhia | Siv tau Scenarios |
|---|---|---|
| Theem 1: Cov hnab ntim khoom siv ntxiv | Tubes bundled thiab qhwv nrog woven nplooj ntawv ntawm ob-txheej yas (polypropylene), nrog ntxiv dag zog rau ob qho tib si kawg. | National land transport or maritime full container (FCL); kev daws teeb meem. |
| Theem 2: Plywood Boxes (zoo siab pom zoo) | Txheem export. Fumigation-free plywood boxes, lined nrog waterproof oiled ntawv los yog yas zaj duab xis kom tsis txhob muaj av noo thiab ntsev tsuag. | Qhov kev xaiv tseem ceeb rau cov raj kub hloov pauv 1.4749. Tiv thaiv curvature thiab breakage, guarantees kev ruaj ntseg tuav nrog ib tug forklift thiab stacking. |
| Qib 3: Hlau Ncej / Kev Txhawb Nqa | Tubes kho ntawm kev cai U-puab steel thav duab los yog muaj zog steel brackets, feem ntau ua ke nrog kev txhawb nqa ntoo. | Diseñado para tubos extralargos (ej: >12 meters), loj-scale industrial tej yaam num thiab ntev-ntev tshwj xeeb xa khoom. |
