ASTM B862 Ti2 Titanium Welded Yeeb Nkab rau Kub Exchangers
Sep 09, 2025
Scope ntawm ASTM B862
ASTM B862 npog welded titanium thiab titanium alloy yeeb nkab thiab raj rau kev siv dav dav, siab, thiab kub exchanger. Nws yog welded -tube counterpart ntawm ASTM B861, uas npog seamless khoom. Cov kev qhia tshwj xeeb txhais cov tshuaj muaj pes tsawg leeg, cov kev xav tau tensile, qhov ntev ntev, thiab kev sim uas txhua qhov ntau yuav tsum dhau ua ntej xa khoom. Cov yeeb nkab thiab cov raj uas ua rau tus qauv no feem ntau muab nkag rau hauv qhov mob annealed.
Qib 2 (Ti2) Cov Txheej Txheem thiab Cov Khoom
Qib 2 yog qib titanium ua lag luam ntshiab nrog cov ntsiab lus nominal titanium saum 99%. Nws cov ntsiab lus txwv txwv ib qho ASTM B862 suav nrog:
| Element | Kev sib xyaw (max, %) |
|---|---|
| Cov pa roj carbon | 0.08 |
| Oxygen | 0.25 |
| Nitrogen | 0.03 |
| Hydrogen | 0.015 |
| Hlau | 0.30 |
| Titanium | Tshuav |
Yam tsawg kawg nkaus tensile yuav tsum tau rau Qib 2 yog 345 MPa (50 ksi) tensile lub zog thiab 275 MPa (40 ksi) yield zog, nrog 20% elongation nyob rau hauv 50 mm. Qib 2 muaj qhov sib npaug zoo ntawm lub zog, kev tsim, weldability, thiab corrosion kuj, uas yog vim li cas nws dominates tshav kub exchanger tube kev pab cuam.
Manufacturing ntawm Welded Titanium yeeb nkab
Welded titanium yeeb nkab yog tsim los ntawm txias -rolled strip los yog coil. Lub strip yog dov - ua rau hauv lub raj, ces welded longitudinally siv cov roj tungsten arc vuam (GTAW) txheej txheem, feem ntau tsis muaj cov hlau muab tub lim, uas ua rau thaj tsam weld ze rau cov niam txiv hlau muaj pes tsawg leeg. Lub weld seam feem ntau flattened los yog loj, thiab lub raj yuav txias los yog annealed tom qab. Vim tias cov phab ntsa tuab tsis sib xws, welded raj feem ntau muab qhov zoo sib xws ntawm ib lub 'meter' dua li seamless khoom ntawm tib qhov loj.
Vim li cas Qib 2 thiaj li Kev Pabcuam Thaum Tshav Kub Kub Exchanger
Thaum tshav kub kub exchanger raj pom corrosive media, kub cycling, thiab kev co. Qib 2 tiv thaiv kev xeb dav dav hauv dej hiav txwv, chlorides, thiab ntau cov txheej txheem tshuaj lom neeg, thiab nws cov oxide zaj duab xis passive tus kheej - kho thaum puas. Cov mob annealed khaws cia ductility rau lub raj dov thiab nthuav dav rau hauv cov ntawv raj. Nrog rau qhov ceev ntawm li 4.51 g / cm3, Qib 2 cov hlab kuj txo cov pob hnyav piv nrog tooj liab -nickel lossis stainless lwm yam.
Kev xeem thiab ntawv pov thawj
Txhua ntau nyob rau hauv ASTM B862 yog raug rau tshuaj ntsuam xyuas, tensile xeem, flattening los yog flaring xeem qhov twg muaj feem xyuam, thiab tsis yog - kev ntsuam xyuas puas xws li ultrasonic los yog eddy - kev sim tam sim no. Hydrostatic los yog pneumatic siab ntsuas kuj yuav tsum tau. Rau cov kev pabcuam cua sov, cov neeg yuav khoom feem ntau thov cov ntaub ntawv pov thawj ntawm EN 10204 Hom 3.1, uas taug qab cov cua sov, cov txiaj ntsig tshuaj, thiab cov ntaub ntawv ntsuas cov tshuab rov qab rau lub zeb.
Cov lus nug nquag
Dab tsi yog qhov txawv ntawm ASTM B862 thiab ASTM B338?
ASTM B862 npog welded titanium yeeb nkab thiab raj feem ntau, thaum ASTM B338 npog ob leeg seamless thiab welded raj tshwj xeeb rau condensers thiab tshav kub exchangers. Ntau lub mills muab B338 raj uas ua tau raws li B862 yuav tsum tau ua.
Qib 2 welded raj puas siv tau rau kev pabcuam dej hiav txwv?
Yog lawm. Qib 2 tau hais dav dav rau cov dej hiav txwv - cov khoom siv hluav taws xob txias txias vim tias nws zoo heev rau cov tshuaj chloride pitting thiab crevice corrosion.
Puas yog welded titanium raj muaj zog li seamless raj?
Nrog lub suab longitudinal weld ua tsis muaj cov hlau muab tub lim, welded Qib 2 raj ua tau raws li qhov xav tau ntawm tensile yam tsawg kawg nkaus raws li seamless raj raws li ASTM specification.
Dab tsi ntawm phab ntsa thickness yog raug rau lub tshav kub exchanger raj?
Feem ntau cov cua kub exchanger raj qhov ntau thiab tsawg ntawm 12.7 hli mus rau 38 hli sab nraud txoj kab uas hla nrog phab ntsa thicknesses ntawm 0.5 hli mus rau 1.6 hli, tab sis cov specification tso cai rau ib tug dav dav.
Puas yog qhov vuam seam yuav tsum tau muab tshem tawm?
Rau feem ntau cov kev siv hluav taws xob sib hloov cov seam yog flattened thiab tej zaum yuav txias ua hauj lwm los yog annealed; cov hlaws sab hauv feem ntau raug tshem tawm lossis txo qis rau kev huv thiab kev ua haujlwm txaus.
Yuav ua li cas weld zoo txheeb xyuas?
Weld zoo yog txheeb xyuas los ntawm eddy-tam sim no los yog ultrasonic kuaj raws li tag nrho ntev, ntxiv rau hydrostatic los yog pneumatic kuaj, raws li yuav tsum tau ntawm cov specification.
