Cold-drawn seamless yeeb nkab yog ib hom yeeb nkab fittings uas tau dav siv tam sim no. Tsis tas li ntawd, muaj ntau hom txias-draw seamless yeeb nkab, thiab ntau hom muaj ntau yam kev thov sib txawv. feem ntau txias
Nws yog tsuas yog siv rau cov cua kub ntawm cov kav dej ntawm cov cua kub cua kub uas tsis tshua muaj siab (qhov kev ua haujlwm siab feem ntau tsis tshaj 5.88Mpa thiab ua haujlwm kub qis dua 450 degree); nws yog siv rau lub boiler (qhov ua hauj lwm siab yog siab tshaj 9.8Mpa).
Qhov kub yog nyob rau nruab nrab ntawm 450 degree ~ 650 degree) cua sov qhov kav dej, cua sov rau tsev neeg lub zog txuag, cua sov nto, rov hluav taws xob dej rhaub, roj crude muaj qib yeeb nkab, thiab lwm yam.
1. Cold-drawn seamless kav yuav ua rau muaj kev cuam tshuam sab nraud xws li lattice tas li crystal defects ntawm raw cov ntaub ntawv thiab nce roughness ntawm nto, thiab ua rau martensite hloov thiab kev loj hlob pearlite.
Austenitic steels qhia cov hlau nplaum zoo dua tom qab kos duab txias.
2. Yog hais tias cov khoom siv lead ua tsis xws luag lossis kev hloov pauv ntawm cov khoom siv raw lattice tas li yog tshwm sim los ntawm qhov chaw, nws yuav dhau los ua qhov pib ntawm qee qhov corrosion xws li pitting corrosion. Cold drawn seamless kav yog deformed
Nyob rau hauv rooj plaub ntawm 20 feem pua txo ntawm tus nqi hla ntu, yuav muaj cov ntaub ntawv tsis zoo tam sim ntawd.
3. Tom qab cov khaub thuas kos seamless raj yog txias drawn, thermal kev nyuaj siab yuav nyob rau hauv cov ntaub ntawv raw, thiab thermal stress tsis zoo heev rau cov kev nyuaj siab corrosion cracking kuj ntawm raw khoom. Cold-drawn seamless kav yog txias-daws ntawm txhua theem
SCC susceptibility ntawm raw khoom rau rub lub seamless yeeb nkab nce sharply.
4. Cov theem ntawm kev kos duab txias kuj muaj qhov cuam tshuam tsis zoo rau qhov kub siab ntev tensile lub zog ntawm cov kav dej txias seamless. Cold-drawn seamless kav feem ntau muaj qhov kub thiab txias ua hauj lwm ntau dua los yog tawg qhov kev pab cuam lub neej.
Cov duab kos txias kuj qis dua.
Qhov sib txawv ntawm cov yeeb nkab txias seamless thiab dav seamless steel yeeb nkab:
1. Feem ntau, lub ntsiab feature ntawm seamless steel yeeb nkab yog arc-dawb vuam seam, uas muaj peev xwm dais lub siab loj heev. Cov khoom tuaj yeem ua tsis sib xws los yog cov khoom sib tw txias.
2. Cold-drawn seamless yeeb nkab yog ib yam khoom uas tau tshwm sim nyob rau hauv xyoo tas los no, feem ntau cov xov thiab nto specifications thiab cov qauv muaj nruj txheem tolerances thiab nto roughness.
