Qhov sib txawv ntawm Stainless Hlau Seamless Yeeb thiab Welded Yeeb Nkab

Stainless hlau muaj kev ua tau zoo tshaj plaws, zoo li zoo thiab cov khoom nto, thiab yog siv dav hauv ntau yam lag luam. Ib yam li ntawd, cov kav hlau stainless tsis muaj qhov tshwj xeeb. Stainless hlau yeeb nkab yog cov khoom siv hlau uas muaj qhov hollow seem, feem ntau muab faib ua seamless Stainless hlau kav thiab welded kav. Kuj tseem muaj qee qhov sib txawv hauv lawv txoj kev ua thiab cov khoom. Qhov sib txawv yog raws li nram no:

Welded Stainless Hlau Yeeb Nkab yog ua los ntawm cov hlau phaj lossis hlau strips uas yog welded tom qab curled thiab tsim los ntawm ib chav tsev thiab pwm. Feem ntau muaj ib qho weld rau ntawm phab ntsa sab hauv ntawm cov yeeb nkab; hos seamless kav muaj xws li round tube blanks raws li raw cov ntaub ntawv rau perforation, uas yog tsim los ntawm txias dov, txias txias los yog kub extrusion txheej txheem. Tsis muaj qhov chaw vuam ntawm lub raj.

Welded Stainless Steel Pipes muaj me me phab ntsa thickness kam rau ua thiab yog ib qho zoo heev nyob rau hauv ib ncig. Cov yeeb nkab steel muaj qhov siab precision, siab ci ci ntawm cov kav dej sab hauv thiab sab nrauv, thiab tuaj yeem txiav kom ntev; nyias-walled kav yuav ua tau. Seamless steel kav muaj qhov tsis tshua muaj siab, tsis sib xws ntawm phab ntsa tuab, tsis tshua muaj qhov ci ntawm sab hauv thiab sab nrauv ntawm cov yeeb nkab, tus nqi siab ntawm sizing. Muaj pitting thiab dub me ntsis ntawm sab hauv thiab sab nrauv uas nyuaj rau tshem tawm. Yog li ntawd, seamless kav feem ntau yog tsim nrog cov phab ntsa tuab.

Seamless kav dej zoo dua li cov kav dej welded nyob rau hauv cov nqe lus ntawm corrosion kuj, siab thiab kub tsis kam. Nrog rau kev txhim kho ntawm kev tsim technology, cov khoom siv ntawm cov kav dej welded yog maj mam mus rau seamless kav. Cov txheej txheem ntawm cov kav dej seamless yog qhov nyuaj dua, yog li cov kav dej seamless kim dua cov kav dej welded.

Raws li cov yam ntxwv thiab qhov sib txawv ntawm seamless stainless hlau kav thiab welded kav, kev xaiv tsim nyog yuav tsum tau ua thaum lub sij hawm thov kom ua tiav cov txiaj ntsig zoo, zoo nkauj thiab txhim khu kev qha:

1. Thaum ua cov kav dej zoo nkauj, cov kav dej cov khoom, thiab cov kav dej prop, feem ntau yuav tsum muaj qhov zoo ntawm cov kav dej, thiab welded stainless hlau kav feem ntau yog siv;

2. Rau kev thauj mus los ntawm cov dej tsis tshua muaj siab, xws li dej, roj, roj, cua, cua sov, dej kub lossis chav dej thiab lwm yam kev siv hluav taws xob tsawg, welded stainless hlau kav feem ntau yog saws;

3. Rau cov kav dej siv los thauj cov dej hauv cov dej num hauv kev lag luam thiab cov khoom siv loj, nrog rau cov kav dej thauj cov dej hauv cov chaw nres tsheb fais fab thiab nuclear fais fab nroj tsuag boilers uas yuav tsum tau ua hauj lwm kub, siab siab, thiab siab zog, seamless stainless hlau kav. yuav tsum xaiv;

4. Welded Stainless Steel Pipes feem ntau siv rau kev thauj cov kua hauv qab 0.8 MPa, thaum cov kav dej seamless tuaj yeem siv los thauj cov kua dej saum toj no 0.8 MPa. Yog tias qhov kev xav tau siab tsis siab, nws yuav raug nqi ntau dua los siv cov kav dej welded.

Qhov zoo:

Txoj kev sib sau ceev yog ceev thiab cov zis yog siab, thiab nws tuaj yeem ua rau ntau yam ntawm cov ntawv hla ntu kom haum rau cov kev xav tau ntawm kev siv. Txias dov ua rau cov yas deformation zoo ntawm cov hlau, yog li ua kom cov khoom taw tes ntawm cov hlau. Kub dov yuav rhuav tshem cov qauv casting ntawm cov hlau ingot, kho cov nplej ntawm cov hlau, thiab tshem tawm qhov tsis xws luag hauv microstructure, yog li ua rau cov qauv hlau ntom ntom thiab cov khoom siv kho tshuab zoo dua.

Qhov tsis zoo:

Hlau delamination-Thaum cov kav hlau yog txias dov, cov khoom tsis yog xim hlau (tsuas yog sulfides, oxides, thiab silicates) hauv cov hlau yog nias rau hauv cov ntawv nyias, ua rau delamination. Delamination zoo heev deteriorates lub mechanical zog ntawm steel raws lub thickness kev taw qhia, thiab tej zaum yuav ua rau interlaminar tearing thaum lub weld expands.

Cov phab ntsa tsis sib xws - Peb txhua tus paub tias hlau nthuav dav nrog cua sov thiab cog lus nrog txias. Txawm hais tias cov yeeb nkab txias-dov steel ncav cuag tus qauv ntev thiab tuab ntawm qhov kawg ntawm dov, tseem yuav muaj qhov txawv tsis zoo tom qab txias kawg.

Qhov loj dua qhov tsis zoo sib txawv, qhov tsis zoo ntawm cov phab ntsa thickness. Yog li ntawd, tib neeg tsis tuaj yeem muaj cov kev cai nruj dhau ntawm phab ntsa tuab, ntev, ncaj thiab ovality ntawm cov kav dej txias-dov seamless steel kav.

Residual stress-Vim qhov txias txias tsis sib xws, cov kav hlau steel ntawm ntau ntu ntu muaj kev ntxhov siab seem. Qhov loj ntawm qhov loj ntawm cov ntoo hla ntawm cov hlau, qhov ntau dua qhov seem ntawm kev ntxhov siab, uas yuav muaj qee yam cuam tshuam rau kev ua tau zoo nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam. Piv txwv li, nws yuav muaj kev cuam tshuam tsis zoo rau deformation, stability, qaug zog, thiab lwm yam.

Kev ua tiav tsis zoo - Cov cim ncab ntawm sab hauv ntawm cov yeeb nkab steel tau muab faib ua longitudinally, qhia symmetrical los yog ib kab folds, qee qhov muaj nyob rau hauv tag nrho ntev, thiab qee qhov muaj qee qhov.

 

Vim lub complexity ntawm cov txheej txheem ntau lawm, cov phab ntsa thickness uniformity ntawm seamless kav yog tsis zoo, yog li cov roughness ntawm sab hauv thiab sab nrauv phab ntsa. Hauv kev siv tiag tiag, qhov xwm txheej no tuaj yeem yooj yim ua rau cov tshuaj chloride ions (lossis sulfide ions) cov khoom (xws li cov organic teeb meem) ua raws li phab ntsa ntawm cov kav hlau stainless.

Ib cheeb tsam hypoxic acidic hauv zos yog tsim rau ntawm cov yeeb nkab phab ntsa, ua rau cov yeeb yaj kiab passivation ntawm cov phab ntsa sab hauv kom yaj, yog li poob nws qhov kev tiv thaiv ntawm cov hlau.

Cov hlau yog nyob rau hauv kev sib cuag ncaj qha nrog cov xov xwm nyob rau hauv acidic ib puag ncig. Raws li anode, nws poob electrons thiab tsim hydroxide nrog dej. Cov hydroxide radicals hauv hydroxide yog hloov los ntawm chloride radicals thiab yaj hauv dej, txo cov nyhuv passivation ntawm anode.

Raws li ib tug cathode, cov nplaum ntes cov hydrogen ions generated nyob rau hauv lub puab phab ntsa los tsim hydrogen gas, uas yog tawm mus rau sab nraud ua ke nrog cov tshuaj tiv thaiv cov khoom ntawm cov hlau nyob rau hauv lub puab phab ntsa.

Raws li cov tshuaj tiv thaiv zoo zuj zus, cov hlau ntawm cov yeeb nkab phab ntsa txuas ntxiv corroded rau pitting corrosion, thiab cov qhov yuav maj mam tob zuj zus thiab loj hlob. Thaum qhov kub nce siab tshaj 50 degree, pitting corrosion accelerates. Qhov siab dua qhov kub, qhov nrawm dua pitting corrosion.

Nyob rau hauv cov xwm txheej ntawm kev ntxhov siab loj, kev ntxhov siab corrosion kuj yuav tshwm sim thiab kev ntxhov siab corrosion expansion cov yam ntxwv yuav sawv cev. Tsis tas li ntawd, cov kav dej seamless yuav tsim ntau yam tsis ruaj khov thaum lub sij hawm vuam txheej txheem, ua rau nws nyuaj rau welded ruaj khov thiab meej.

Welded stainless hlau kav-Stainless hlau strips nrog cov phab ntsa tuab tuab yog welded thiab dov rau hauv ib qho kev tiv thaiv roj yam tsis tau ntxiv cov khoom siv.

Qhov zoo:

1. Uniform phab ntsa thickness - cov khoom siv hauv paus yog tsim strip, nrog cov phab ntsa tuab zoo sib xws thiab siab nto tiav, mus txog qib qib 2B.

2. Tsis tshua muaj kev ntxhov siab-cov yeeb nkab steel tsim yog ci ntsa iab ntawm qhov kub siab tshaj 1040 degree kom tshem tawm kev ntxhov siab.

3. Lub zog vuam siab - txoj kev vuam yog fusion vuam, thiab cov khoom muaj pes tsawg leeg tseem tsis hloov.

Tom qab kev kho cua sov kub, cov vuam thiab cov hlau puag muaj tib lub qauv intergranular. Thaum cov weld raug kev puas tsuaj xws li flattening, rov qab khoov, thiab flaring, yuav tsis muaj kab nrib pleb, burrs, lossis lwm yam teeb meem ntawm lub vuam. Ntxiv mus, eddy tam sim no xeem thiab dej siab los yog huab cua siab test kuj yuav tsum tau los xyuas kom meej qhov zoo ntawm cov kav dej.

4. Zoo sib xws - lub sab nraud txoj kab uas hla, phab ntsa thickness, ntev thiab straightness ntawm cov yeeb nkab muaj zoo sib xws thiab siab ua hauj lwm raug.