Hlau-sealed pob valve hardening txheej txheem Cov lus piav qhia luv luv ntawm yuav ua li cas lub pob valve tawg tawm hauv lub rooj vag valve kev lag luam?

Hlau-sealed pob valve hardening txheej txheem Cov lus piav qhia luv luv ntawm yuav ua li cas lub pob valve tawg tawm hauv lub rooj vag valve kev lag luam?

 
Nyob rau hauv thermal fais fab nroj tsuag, petrochemical khoom system software, lub zog thiab tshuaj lom neeg kev lag luam siab viscous kua, nrog soot thiab khoom hais txog kev sib xyaw ua ke ntawm cov kua, muaj zog corrosion ntawm cov kua thiab lwm yam xov xwm, pob li qub yuav tsum siv hlau cov ntaub ntawv nyuaj foob rooj vag valve valve, yog li ntawd. Kev siv cov khoom siv hlau tsim nyog nyuaj foob lub rooj vag valve pob valve pob thiab lub rooj zaum hardening txheej txheem tseem ceeb heev.
1. Kev Taw Qhia luv luv
Nyob rau hauv thermal fais fab nroj tsuag, petrochemical khoom system software, lub zog thiab tshuaj lom neeg kev lag luam siab viscous kua, nrog soot thiab khoom hais txog kev sib xyaw ua ke ntawm cov kua, muaj zog corrosion ntawm cov kua thiab lwm yam xov xwm, pob li qub yuav tsum siv hlau cov ntaub ntawv nyuaj foob rooj vag valve valve, yog li ntawd. Kev siv cov khoom siv hlau tsim nyog nyuaj foob lub rooj vag valve pob valve pob thiab lub rooj zaum hardening txheej txheem tseem ceeb heev.
2, hlau cov ntaub ntawv nyuaj foob rooj vag valve pob valve pob thiab lub rooj hardening txoj kev
Tam sim no, cov txheej txheem hardening feem ntau nyob rau saum npoo ntawm cov hlau nyuaj foob rooj vag valve pob valve yog raws li hauv qab no:
(1) Lub pob nto tshuaj tsuag vuam (los yog tshuaj tsuag vuam) cov cuab yeej cemented carbide, qhov hardness tuaj yeem ncav cuag li 40HRC, lub pob saum npoo tshuaj tsuag vuam cemented carbide cov txheej txheem yog qhov nyuaj, kev tsim khoom thiab kev tsim khoom tsis siab, thiab qhov loj. tsuag welding yog ib qho yooj yim los ua qhov deformation, tam sim no lub pob nto hardening txheej txheem daim ntawv thov yog tsawg.
(2) Lub pob saum npoo tawv oxidation, hardness tuaj yeem ncav cuag 60 ~ 65HRC, thickness 0.07 ~ 0.10mm, stainless hlau txheej siab hardness, hnav tsis kam, corrosion kuj thiab tuaj yeem ua kom lub ntsej muag ci, txheej txheem yooj yim, tus nqi qis. Txawm li cas los xij, qhov nyuaj ntawm cov tawv chromium txheej yuav raug txo kom sai los ntawm kev tso tawm ntawm nws cov thermal stress thaum qhov kub thiab txias, thiab nws cov kev khiav hauj lwm kub tsis tuaj yeem siab dua 427 ℃. Tsis tas li ntawd, kev sib xyaw ua ke ntawm stainless hlau txheej yog qhov tsawg, thiab cov txheej txheem yooj yim poob.
(3) Qhov saum npoo ntawm lub pob yog plasma nitriding, qhov tawv tawv tuaj yeem ncav cuag 60 ~ 65HRC, lub thickness ntawm nitriding kho txheej yog 0.20 ~ 0.40mm, tsis tshua muaj kub plasma nitriding kev kho mob nyuaj substrate txheej txheem vim nws tsis muaj zog corrosion tsis kam. yuav siv tau nyob rau hauv chemical cog muaj zog etching thiab lwm yam lag luam.
(4) Pob nto supersonic txau (HVOF) txheej txheem, hardness siab heev, tuaj yeem ncav cuag 70 ~ 75HRC, siab zog, thickness 0.3 ~ 0.4 hli, supersonic txau yog cov txheej txheem tseem ceeb ntawm pob nto hardening. High viscous kua hauv thermal fais fab nroj tsuag, petrochemical khoom system software, lub zog thiab tshuaj lom neeg kev lag luam; Cov txheej txheem hardening no yog siv rau hauv feem ntau ntawm cov kua sib xyaw ua ke, cov kua dej uas muaj corrosive heev nrog cov hmoov av thiab cov khoom siv.
Cov txheej txheem supersonic txau yog cov txheej txheem uas cov roj combustion ua rau cov pa roj siab kom nrawm rau qhov cuam tshuam ntawm cov hmoov nplej ntawm cov khoom ua haujlwm saum npoo ntawm cov khoom thiab ua rau cov txheej txheem siab ceev. Nyob rau hauv kev sib tsoo sib txuas, vim hais tias cov particle ceev ceev (500-750m / s) thiab particle kub yog tsawg (-3000 ℃), txheej nrog siab bonding zog, tsawg porosity thiab tsawg hlau oxide txheeb ze cov ntsiab lus yuav tau tom qab lub kev sib tsoo ntawm lub workpiece nto. Tus yam ntxwv ntawm HVOF yog tias cov particle ceev ntawm cov hmoov hlau alloy tshaj qhov ceev ntawm lub suab, txawm tias 2 ~ 3 npaug ntawm lub suab nrawm, thiab qhov nruab nrab ceev ntawm cua daj cua dub yog 4 npaug ntawm lub suab nrawm.
HVOF yog ib qho kev tsim khoom tshiab thiab kev siv tshuab, xim tuab 0.3 ~ 0.4mm, nruab nrab ntawm cov txheej thiab cov khoom ua haujlwm sib txuas, kev sib txuas siab zog (77MPa), txheej porosity tsawg ( Txau vuam yog txheej txheem ntawm arc txau rau saum npoo ntawm cov khoom siv hlau sib xyaw. Nws yog los ntawm cov hmoov pyreogen (hlau hmoov, alloy hmoov, ceramic hmoov tuaj yeem ua tau) cua sov kom yaj lossis ua cov yas siab, nrog rau cov cua daj cua dub rau nws tawg, sau rau saum npoo ntawm cov khoom tom qab kev kho mob ua ntej, tsim ib txheej thiab cov khoom ua haujlwm. nto (phaj) khoom fusion txheej (welding) txheej.
Txau vuam thiab tshuaj tsuag vuam hardbase txheej txheem alloy thiab substrate muaj txheej txheem melting, carbide tej cuab yeej thiab substrate muaj kub yaj cheeb tsam, thiaj li ua tiav cov tshuaj tsuag vuam los yog tshuaj tsuag vuam carbide txiav txheej yam ntxwv, tiv thaiv tom qab kev kho mob vuam kub yaj cheeb tsam rau cov khoom siv hlau hu. cheeb tsam, thov tshuaj tsuag vuam los yog tshuaj tsuag vuam carbide tej cuab yeej thickness yuav tsum ntau tshaj 3 hli saum toj no.
3. Lub hardness ntawm qhov chaw sib cuag ntawm lub zog foob lub rooj vag valve pob valve thiab lub rooj zaum valve yog sib xws.
Cov zawv zawg sib cuag ntawm cov ntaub ntawv hlau yuav tsum muaj qee qhov hardness, txwv tsis pub nws yooj yim los tsim qhov xwm txheej ntawm kev tuag. Hauv cov ntawv thov tshwj xeeb, qhov sib txawv ntawm qhov sib txawv ntawm lub pob valve thiab lub rooj zaum valve yog 5 ~ 10HRC, thiab qhov sib txawv hardness pob valve tuaj yeem muaj kev pabcuam zoo. Vim tias lub pob ntau lawm thiab kev ua haujlwm nyuaj, cov nqi tsim khoom siab, txhawm rau tiv thaiv lub pob tsis yooj yim rau kev puas tsuaj thiab kev puas tsuaj, feem ntau xaiv qhov nyuaj ntawm lub pob yog siab dua qhov hardness ntawm lub rooj zaum saum npoo.
Pob thiab lub rooj zaum ntawm lub rooj sib cuag ntawm qhov tawv tawv yog qhov zoo dua rau ob hom kev sib zog sib koom ua ke: (1) Valve pob nto hardness 55HRC, lub rooj zaum ntawm lub rooj zaum 45HRC, lub pob valve tuaj yeem txais cov tshuaj tsuag supersonic Stellite20 aluminium alloy, valve lub rooj zaum saum npoo. tuaj yeem siv tshuaj tsuag welding Stellite12 aluminium alloy, hardness ntawm kev sib koom ua ke yog hlau foob pob valve dav siv hardness kev sib koom ua ke, tuaj yeem ua tau raws li cov kev xav tau ntawm cov khoom siv hlau nyuaj foob pob valve pob valve; Qhov nyuaj ntawm lub pob valve yog 68HRC, qhov saum npoo ntawm lub rooj zaum valve yog 58HRC, qhov saum npoo ntawm lub pob valve tuaj yeem ua subsonic txau tungsten carbide, qhov saum npoo ntawm lub rooj zaum valve tuaj yeem ua supersonic txau Stellite20 aluminium alloy, hardness yog siv nrog lub zog thiab chemical kev lag luam, nrog siab hnav tsis kam thiab kev pab lub neej.
Txawv teb chaws, lub pob valve thiab lub rooj zaum ntawm lub rooj zaum sib tw ua ke nrog tib lub hardness. Tag nrho lub pob valve thiab lub rooj zaum ntawm lub rooj zaum siv subsonic txau cov txheej txheem tungsten carbide, thiab qhov tawv tawv yog ntau dua 72HRC. Txawm tias nyob rau hauv qhov chaw ntawm qhov nyuaj siab heev, lub pob valve thiab lub rooj zaum ntawm lub rooj zaum kov ntawm qhov chaw thiab tsis yooj yim tua. Tab sis tam sim no peb lub pob valve ua kom tawv tawv ntawm ntau dua 72HRC lub pob valve, lub rooj zaum valve tsis zoo meej sib tsoo tshuab, nws yog qhov nyuaj los xyuas kom meej lub pob valve thiab lub rooj zaum sib koom tes, daim ntawv thov tsawg dua.
4, hard seal gate valve pob valve pob thiab lub rooj hardening them sai sai rau qhov teeb meem
Cov ntaub ntawv nyoos ntawm cov hlau tawv foob lub rooj vag valve pob thiab lub rooj zaum valve feem ntau xaiv stainless hlau phaj lossis cov khoom siv corrosion resistant, txwv tsis pub cov cuab yeej carbide thiab lub rooj zaum valve (los yog pob) txheej txheej yog yooj yim rau corroded los ntawm cov khoom, ua rau cov cuab yeej carbide poob. down, ua mob rau lub neej kev pab cuam ntawm lub pob valve.
Tsis tas li ntawd, raws li lub rooj sib txawv ntawm lub rooj zaum (los yog lub pob valve) cov khoom siv raw yuav tsum xaiv lawv tus kheej cov txheej txheem hardening, nyob rau hauv lub tshav pob ntawm lub zog thiab tshuaj lom neeg kev lag luam yog siv rau ob-theem steel raw cov ntaub ntawv, dual-theem steel raw cov ntaub ntawv muaj zoo corrosion kuj. qaug zog thiab hnav cov yam ntxwv corrosion.
Ob-theem steel raw khoom yog ib hom hlau nrog ob qho tib si metallographic qauv thiab austenitic qauv, microstructure thiab austenitic qauv ntawm li 50%, thiab ob-theem mechanism muaj nyob, nws cov yam ntxwv kev ua tau zoo yog ob qho tib si hlau tsis tshua muaj hlau thiab 430 stainless hlau. yam ntxwv. Nyob rau hauv 430 stainless hlau yam ntxwv, thaum kub yog 400 ~ 500 ℃ ntau, thermal rwb thaiv tsev mus sij hawm ntev yuav tsim ib tug tej yam kev laus, qhov teeb meem no feem ntau hu ua 475 ℃ laus; Thaum qhov kub siab tshaj 400 ~ 500 ℃, cov yam ntxwv ntawm ob-theem steel tuaj yeem raug rhuav tshem.
Yog tias cov tshuaj tsuag welding lossis tshuaj tsuag vuam carbide txiav cov txheej txheem siv rau biphase steel raw cov ntaub ntawv, cov txheej txheem ntawm cov txheej txheem ntawm cov txheej txheem ntawm cov cuab yeej carbide thiab cov substrate melting (ambient kub yog feem ntau ntau tshaj 900 ℃), yuav ua rau cov alloy muaj pes tsawg leeg ntawm biphase steel raw cov ntaub ntawv. , yog li biphase steel raw cov ntaub ntawv yuav tsum tsis txhob siv tshuaj tsuag welding (los yog tshuaj tsuag welding) carbide tej cuab yeej hardening txheej txheem. Cov txheej txheem supersonic txau yog tsim rau cov txheej txheem hardening ntawm biphase steel raw khoom. Cov txheej txheem hardening yuav tsum xyuas kom meej tias cov alloy muaj pes tsawg leeg ntawm biphase steel raw cov ntaub ntawv tsis tuaj yeem raug puas tsuaj.
5. Cov lus kaw
Kev tshawb fawb thiab tsim nyog hardening txheej txheem yog xaiv rau lub pob thiab lub rooj zaum ntawm cov hlau nyuaj kaw lub rooj vag valve pob valve, uas tuaj yeem txiav txim siab ncaj qha rau lub neej kev pabcuam thiab kev ua haujlwm ntawm cov hlau nyuaj kaw lub rooj vag valve, thiab cov txheej txheem kev tshawb fawb thiab tsim nyog hardening tuaj yeem txo tus nqi. Nrog rau qhov tshwm sim ntawm cov thev naus laus zis tshiab, yuav muaj kev kho ntau dua. Nws yog ib qho teeb meem nyuaj heev uas cov txheej txheem hardening thiab hardness ntawm hlau hard seal gate valve koom tes nrog ib leeg. Yog li ntawd, txaus siab yuav tsum tau them nyiaj rau kev sib koom tes ntawm kev tsim, cov khoom siv, txheej txheem hardening thiab hardness ntawm lub hard seal gate valve.
Yuav ua li cas lub pob valve tawg tawm hauv lub rooj vag valve kev lag luam? Nyob rau xyoo 1950, pob li qub maj mam tshwm sim hauv kev tsim khoom lag luam ntawm cov tebchaws sab hnub poob. Thiab nws txoj kev siv maj mam nce ntxiv, los ntawm lwm tus tseem ua tiav ntau yam kev txhim kho. Tam sim no nyob rau hauv peb lub teb chaws, pob valve tseem ceeb siv nyob rau hauv kws machinery, roj av refining, hydraulic engineering tshuaj nroj tsuag, hluav taws xob fais fab engineering daim ntawv kev lag luam steel khoom thiab lwm yam kev lag luam, cov industries muaj ib tug tseem ceeb txoj hauj lwm nyob rau hauv kev sib raug zoo thiab economic kev loj hlob, yog li, pob valve. yog indispensable tshuab thiab khoom siv nyob rau hauv cov kev lag luam.
Nyob rau xyoo 1950, pob li qub maj mam tshwm sim hauv kev tsim khoom lag luam ntawm cov tebchaws sab hnub poob. Thiab nws txoj kev siv maj mam nce ntxiv, los ntawm lwm tus tseem ua tiav ntau yam kev txhim kho. Tam sim no nyob rau hauv peb lub teb chaws, pob valve tseem ceeb siv nyob rau hauv kws machinery, roj av refining, hydraulic engineering tshuaj nroj tsuag, hluav taws xob fais fab engineering daim ntawv kev lag luam steel khoom thiab lwm yam kev lag luam, cov industries muaj ib tug tseem ceeb txoj hauj lwm nyob rau hauv kev sib raug zoo thiab economic kev loj hlob, yog li, pob valve. yog indispensable tshuab thiab khoom siv nyob rau hauv cov kev lag luam.
Pob valve yuav ua li cas kom zoo
Hauv thaj chaw ntawm lub rooj vag li qub, muaj ntau hom rooj vag li qub. Yog vim li cas vim li cas pob li qub tuaj yeem sawv tawm thiab nquag siv hauv ntau qhov chaw yog tias lawv tsis tuaj yeem hloov tsis tau yam tsis muaj qhov zoo. Yog li, dab tsi yog qhov zoo ntawm pob li qub?
Ua ntej, lub pob valve tsis tuaj yeem tsis quav ntsej kom zoo dua yog hnav tsis kam. Raws li kev lag luam cov kws tshaj lij thiab cov neeg ua haujlwm tau piav qhia ntxaws ntxaws, rau lub rooj vag valve, hnav tsis kam yog qhov tseem ceeb los ntsuas qhov zoo ntawm lub rooj vag valve, roj hmab sealing nplhaib ntawm lub pob valve yog carbon steel tsuag vuam, thiab lub valve sealing. nplhaib yog yas los yog lwm yam alloys, ntau yam ntaub ntawv tsis yog lub pob valve carbon steel surfacing hnav tsis kam.
"Raws li peb txhua tus paub, lub rooj vag valve yog qhov hloov pauv, uas yuav tsum tau qhib thiab kaw tib lub sijhawm, tab sis tib lub sijhawm, lub nplhaib sealing yuav raug puas tsuaj heev, tab sis lub nplhaib sealing ntawm lub pob valve tsis tuaj yeem ua rau. qhov xwm txheej zoo li no. " Yog kev lag luam qhia.
Qhov thib ob, lub pob valve sealing zoo heev. Raws li kev txheeb cais, kev sib khi ntawm lub pob valve tsis yog los ntawm cov cuab yeej sib tsoo, tab sis los ntawm kev sib tsoo khoom siv, kom ntseeg tau tias qib kev ua raws qib siab dua, yog li kev sib khi zoo heev.
Tsis tas li ntawd, pob valve kev pab cuam lub neej yog tshwj xeeb ntev. Nws tseem yog ib qho chaw tsim khoom lag luam rau cov khoom siv khoom siv ntau heev.
"Vim tias qhov kev xav tau feem ntau siv rau ntau qhov chaw ntawm kev tsim khoom tseem ceeb, tau kawg, yog tias nws lub neej ua haujlwm tsis ntev txaus, feem ntau yuav tsum tau hloov pauv, yuav dhau los ua teeb meem loj, yuav ua rau muaj kev ua yuam kev ntau."
Pob valve qauv xaiv kev txawj los qhia
Pob valve raws li kev cia siab rau lub rooj zaum qhib thiab kaw qhov chaw, qhov zoo ntawm nws lub tshuab ruaj khov yog qhov tseem ceeb heev. Yog li nyob rau hauv cov qauv xaiv kom ua raws li qee cov ntsiab lus, thiaj li ua tiav qhov kev xav tau tiag tiag.
Muab qhov tseem ceeb rau kev xaiv cov kev qhia tshwj xeeb. Raws li kev txheeb cais, lub pob valve cov kua dej ntom ntom feem ntau tsis loj, qhov kev nyab xeeb channel thiab cov kav dej yog tib yam, yog li nws tuaj yeem siv rau qee qhov chaw tshwj xeeb rau kev ua haujlwm ntawm cov khoom siv. Thaum xaiv qhov zoo ntawm lub rooj vag valve, peb yuav tsum tau them sai sai rau cov kev xaiv ntawm specifications. Cov kev qhia tshwj xeeb tsis zoo ib yam li qhov hnyav, thiab cov nyhuv tuaj yeem ua tiav tsis zoo ib yam.
Kev txiav txim siab zoo ntawm tus nqi. Hauv kev xaiv ntawm li qub, ntxiv rau kev yuav khoom ib puag ncig, peb kuj yuav tsum tau them sai sai rau qhov kev xav tau, tsuav nws tuaj yeem ua tau raws li qhov xav tau tshwj xeeb ntawm lub peev xwm, tsis tas yuav xaiv qhov loj specifications lossis qhov tseem ceeb yog qhov kev xaiv zoo tshaj plaws.
Tsis tas li ntawd, cov pob valve ruaj khov yog kaw lub qhov rooj. Yog tias lawv siv nyob rau hauv qhov kub thiab txias tshaj tawm los yog ib puag ncig ntuj uas yuav ua rau vaporization, lub rooj vag li qub uas muaj cov cuab yeej tso tawm yuav tsum raug xaiv. Thaum tsim nyog, lub pob valve yuav tsum tau hloov mus rau hauv lub disc valve los yog txiav tawm valve.
Kev lag luam hais txog qhov zoo ntawm lub rooj vag valve feem ntau tuaj yeem siv rau kev sib txuas cov yeeb nkab tsis muaj cov qauv pob. Yog tias tsim nyog, kev xaiv ntawm lub valve no kuj tuaj yeem xaiv raws li qhov xav tau ntawm kev tsim kho ntawm txoj kev nyab xeeb channel, uas tuaj yeem ua kom ntseeg tau tias nws tuaj yeem ua tau raws li qhov xav tau ntawm ntau txoj kev nyab xeeb thiab txo qis tag nrho cov kev siv ntawm lub valve raws li deb li qhov ua tau.
Nws yog ib qho tsim nyog ceeb toom rau koj tias kev xaiv cov pob li qub kuj tseem ceeb rau kev xaiv cov npe nrov thiab lawv cov nqi. Nws yog ib qho kev xaiv zoo los xaiv qhov zoo tshaj plaws lub rooj vag valve.