Muaj cuaj yam khoom siv rau lub cev valve raws li hauv qab no:
1. grey cam khwb cia hlau, haum rau qhov tsis tshua muaj siab li qub nrog kev ua haujlwm kub ntawm -15 ~ +200 degree thiab nominal siab PN Tsawg dua lossis sib npaug rau 1.6MPa.
2. dub malleable cam khwb cia hlau, haum rau kev ua hauj lwm kub ntawm -15 ~ +250 degree, nominal siab PN Tsawg tshaj los yog sib npaug rau 2.5MPa low-pressure li qub.
3. Cov cam khwb cia hlau, haum rau kev ua haujlwm kub ntawm -30 ~ +350 degree , nominal siab PN Tsawg dua los yog sib npaug rau 4.0MPa low-pressure li qub.
4. Carbon steel (WCA, WCB, WCC), muaj feem xyuam rau kev khiav hauj lwm kub ntawm -29 ~ +425 degree ntawm nruab nrab thiab high-pressure li qub, ntawm uas 16Mn, 30Mn kev khiav hauj lwm kub ntawm {{6 }} ~ +450 degree , feem ntau siv rau qhov chaw ntawm ASTMA105.
5. Tsawg-kub carbon steel (LCB), haum rau kev khiav hauj lwm kub ntawm -46 ~ +345 degree low-temperature valve valve.
6. Alloy steel (WC6, WC9), muaj feem xyuam rau kev khiav hauj lwm kub ntawm -29 ~ +595 degree ntawm qhov nruab nrab tsis corrosive ntawm high-temperature thiab high-pressure li qub; WC5, WC12 muaj feem xyuam rau kev khiav hauj lwm kub ntawm -29 ~ +650 degree ntawm corrosive nruab nrab ntawm high-temperature thiab high-pressure li qub.
7. Austenitic stainless hlau, haum rau kev ua haujlwm kub ntawm -196 ~ +600 degree corrosive nruab nrab ntawm lub valve.
8. Monel alloy, feem ntau yog rau li qub uas muaj hydrogen thiab fluorine media.
9. cam khwb cia tooj liab alloy, feem ntau yog siv rau kev ua hauj lwm kub ntawm -273 ~ +200 degree ntawm cov pa pipeline valve.
Cov npe saum toj no yog lub valve lub cev ntawm cov ntaub ntawv uas feem ntau siv nyob rau hauv ntau pawg, tshwj xeeb rau txhua hom khoom siv, muaj ntau qib sib txawv, ntau qib sib txawv thiab siv rau ntau hom kev sib txawv. Yog li ntawd, nyob rau hauv kev xaiv ntawm valve lub cev cov ntaub ntawv, yuav tsum tau raws li nyob rau hauv kev siv sib txawv thiab txawv theem siab, los txiav txim lub valve lub cev cov ntaub ntawv uas haum rau cov kev xav tau ntawm kev ua hauj lwm tej yam kev mob.
Tsis tas li ntawd, cov khoom siv lub cev yog titanium alloy (titanium valve), aluminium alloy (aluminium valve); yas (plastic valve); ceramic (ceramic valve) thiab lwm yam.
Valve lub cev dawb paug txheej txheem kev kho cua sov raws li cov khoom sib txawv yog raws li hauv qab no:
1. grey cam khwb cia hlau kho cua sov.
Txhawm rau kom ua tiav cov hom phiaj sib txawv, grey cam khwb cia hlau tom qab casting tuaj yeem ua qhov sib txawv ntawm kev kho cua sov. Valve ntau lawm ntawm grey cam khwb cia hlau valve lub cev thiab lwm yam nyob rau hauv lub casting ntawm lub tshav kub kev kho mob txheej txheem yog feem ntau siv los tshem tawm cov kev ntxhov siab casting thiab tshem tawm cov casting kub aging thiab dawb carburite annealing ntawm kub. Thermal aging yog ib txoj kev tsim nyog. Kub-kub annealing tsuas yog nyob rau hauv lub casting vim cov tshuaj muaj pes tsawg leeg thiab casting txias npaum li cas tswj tsis tsim nyog, ua rau muaj cov thawj carburite nyob rau hauv lub casting lub koom haum tsuas yog thaum nws yog siv es tsis txhob kub aging.
2. Carbon cam khwb cia steel cua sov kho.
Cam khwb cia hlau qhov chaw nyob rau hauv lub casting muaj ib tug loj casting residual kev nyuaj siab, tej zaum cam khwb cia hlau qhov chaw ntawm lub koom haum ntawm ntxhib, thiab txawm lub tshwm sim ntawm superheated lub koom haum. Cov no cuam tshuam rau qhov kev ruaj ntseg ntawm cov cam khwb cia hlau qhov chaw, txo cov khoom siv hluav taws xob ntawm cov hlau thiab tsis zoo rau cov txheej txheem txiav. Txhawm rau tshem tawm cov kev ntxhov siab, kev ua kom zoo ntawm lub koom haum, txhim kho cov khoom siv kho tshuab thiab txhim kho kev ua haujlwm, valve tsim cov pa roj carbon steel valve lub cev thiab lwm yam hauv cov casting feem ntau yog siv tom qab annealing lossis normalizing + tempering.
3. Austenitic stainless acid-resistant steel tshav kub kho.
Austenitic stainless acid-resistant steel yog lub ntsiab tsis xws luag yog feem ntau cuam tshuam rau intergranular corrosion, feem ntau tuaj yeem siv los siv qee qhov kev kho cua sov ntawm cov hlau los tiv thaiv kev ntsuas. Valve ntau lawm ntawm austenitic stainless acid-resistant steel valve lub cev thiab lwm qhov chaw feem ntau xaiv cov txheej txheem kho cua sov: kev kho kev daws teeb meem (quenching), stabilization thiab sib sib zog nqus txias txias.
4. martensitic tshav kub-resistant steel tshav kub kho.
Martensitic tshav kub-resistant hlau nyob rau hauv lub casting yuav tsum tau annealed nyob rau hauv raws sij hawm kom tsis txhob tawg, thiab annealing rwb thaiv tsev lub sij hawm yuav tsum txaus (feem ntau 4 ~ 8 teev). Martensitic tshav kub-resistant steel annealing yog tsom rau kev tshem tawm kev ntxhov siab, recrystallisation, grain refinement, txo hardness, txhim kho kev ua tau zoo, thiab rau kev kho cua sov zaum kawg los ua cov koom haum npaj.
Martensitic tshav kub-resistant steel zaum kawg kev kho cua sov siv normalizing + tempering.
5. Kev kho cua sov zoo carbon steel.
Kev kho cua sov zoo rau 35 forged steel valve lub cev ua piv txwv, 35 steel valve lub cev forging yuav tsum normalised, thiab nws qhov kawg kev kho cua sov raws li cov kev cai ntawm valve manufacturing technology ntaub ntawv, feem ntau yuav tsum tempered.