Kev siv dej huv (qib khoom noj) stainless hlau pipes tau siv ntau yam li kws tshuaj, kev ua yeeb yaj kiab, aviation nuciable kev lag luam thiab lwm yam kev siv hauv tebchaws. Muaj ntau ntawm cov neeg tuaj txawv teb txhua xyoo.
1. Nto Kev Ntsuam Xyuas ntawm Stainless Hlau
Ob txoj kev AES thiab txoj kev kho mob SPEC tuaj yeem siv los soj ntsuam qhov chaw ntawm cov hlau corrosion los txiav txim siab qhov muaj peev xwm corrosion los ntawm cov hlau sab hauv thiab sab nraud ntawm stainless hlau. Kev txheeb xyuas cov cheeb tsam tawm los ntawm aes yog qhov tsawg heev, uas tuaj yeem tsawg dua 20nm. Nws cov haujlwm qub yog txhawm rau txheeb xyuas cov khoom. Tus nqi tes taw ntawm XPS txoj kev yog kwv yees li 10μm, uas yog siv los txiav txim siab rau lub xeev ntawm cov ntsiab nyob ze ntawm qhov chaw.
Kev ntsuas lub tshuab polished ntawm 316 stainless hlau uas tau raug rau cov cua dub thiab xps kev ntsuas qhov tob ntawm cov lus qhia thiab tuab ntawm txheej passivation. Lub corrosion tsis kam thiab lwm yam.
Raws li cov lus txhais, Austenitic Stainless hlau muaj cov chromium thiab npib tsib xee, thiab lwm yam muaj 10,5% lossis ntau dua ntawm chromium thiab muaj zoo corrosion tsis kam. Cov corrosion tsis kam yog qhov tshwm sim ntawm kev tiv thaiv thaj chaw ntawm cov chromium-nplua nuj txheej dhau txheej. Txheej passivation feem ntau yog 3-5nm tuab, lossis sib npaug rau 15 atoms tuab. Txheej passivation yog tsim thaum lub sij hawm oxidation-txo cov tshuaj tiv thaiv cov txheej txheem uas chromium thiab hlau yog oxidized. Yog tias txheej passivation puas, txheej transmedation tshiab yuav raug tsim sai thiab electrochemical corrosion yuav tshwm sim tam sim ntawd, thiab tob me ntsis ntawm stainless hlau yuav tshwm sim. Corrosion thiab intergranular corrosion. Passivation corrosion kuj cuam tshuam nrog cov ntsiab lus ntawm cov hlau siv tshuaj tsis muaj peev xwm ua kom lub zog passive, thiab txhim kho txoj kev ua kom xeb, thiab txhim kho txoj kev ua kom xeb, thiab txhim kho cov txheej txheem uas passivation; Thiab siv nws nrog sab hauv ntawm cov yeeb nkab steel hlau. Cov dej nruab nrab muaj feem xyuam.
2. Do des corrosion ntawm stainless hlau yeeb nkab
(1) Txheej ntawm cov txheej txheem hla ntawm cov hlau stainless yooj yim puas yooj yim hauv cov kab ci-muaj nruab nrab, vim tias cov pa-oxidation muaj peev xwm loj. Yog tias txheej uas passivation tsuas yog rau ntawm cov hlau, cov ntawv luam tawm yuav txuas ntxiv rau corrode. Hauv ntau kis, txheej passivation tsuas yog puas hauv thaj chaw hauv zos ntawm cov hlau nto. Cov nyhuv ntawm corrosion yog los ua cov qhov me me lossis cov pits. Cov pits me me uas tau faib faib rau cov khoom saum npoo yog hu ua pitting corrosion. Tus nqi corrosion nce nrog kev nce kub thiab nce nrog nce kev nce siab. Kev daws yog siv ultra-tsawg lossis tsawg-carbon stainless hlau (xws li 316L lossis 304L)
(2) Lub passive warp txheej rau saum npoo ntawm anustenitic stainless hlau yooj yim rhuav tshem thaum tsim khoom thiab vuam. Thaum lub cua sov sov thaum tsim thiab vuam nyob rau hauv cov khoom yuav ua ntej nrog chromium los ua cov chromium carbide thiab poob chromium. Raws li qhov tshwm sim, cov ntsiab lus Chromium cov ntsiab lus txuas ntxiv nrog cov roj ua ntej, uas tsis muaj zog, ua kom tsis muaj zog, ua kom tsis muaj zog ntawm cov xeb uas passivation. Thaum nyob rau hauv kev sib cuag nrog corrosive media xws li ci- hauv nruab nrab, nws yuav ua rau micro-tam sim no corrosion. Txawm hais tias lub corrosion tsuas yog nyob rau saum npoo ntawm cov nplej, nws sai sai rau hauv sab hauv los ua cov kev txhim kho corrosion. Tshwj xeeb tshaj yog cov yeeb nkab stainless hlau yog qhov pom tseeb hauv kev saib xyuas ib feem.
(3) Kev ntxhov siab corrosion tawg: nws yog cov nyhuv sib xyaw ua ke ntawm kev ntxhov siab zoo nkauj thiab corrosion uas ua rau tawg thiab hlau embrittlement. Ib puag ncig rau kev ntxhov siab corrosion tawg yog feem ntau nyuaj heev. Tsis tsuas yog lub tensile muaj kev ntxhov siab, tab sis kev sib xyaw ua ke ntawm qhov kev ntxhov siab no thiab kev ntxhov siab uas muaj kev ntxhov siab hauv cov hlau vim yog kev kho cua sov.
3. Cov Txheej Txheem Ntau Lawm Ntawm Huv Welded Stainless Hlau Yeeb Nkab
Uncoiling-kev ua-vuam-forming-vuam (roj tiv thaiv box) -Txoj Kev Sib Tsoo-Kab Sib Tsoo-Yeeb Nkab Tu-Quav Kev Lom Zem-Tej
Nws raug pom zoo kom siv cov kev ua kom yog cov yeeb nkab cov yeeb nkab ntau lawm kab Hangao Tech (Seko Machinery) . Txij li thaum tus kab hlau hlau ncaj qha siv rau kev sib tw vuam tom qab sib sau ua ke, kev ua haujlwm ntawm cov raj dej tuaj yeem raug tswj hwm tau zoo, thiab cov txheej txheem ntawm cov khaub thuas conduction tuaj yeem raug rho tawm.
Muaj ob peb cov khoom siv tseem ceeb hauv kev tsim khoom:
(1) Cov khoom siv theem theem sab hauv : nws tuaj yeem nias rov qab thiab cov khoom siv hauv lub ntsej muag zoo nkauj dua thiab ua rau lub raj sab sab hauv Thaum lub sij hawm sab hauv polishing thiab sab nraud polishing, nws kuj tuaj yeem txo cov naj npawb thiab siv polishing thiab txo poob.
(2) Cov roj tiv thaiv cov roj ci ci: nws muaj ob ntu, cov ci ci annealing rauv lub cev lub cev thiab cov cua txias dej.
Ci annaling rauv lub cev lub cev: tus qauv tseem ceeb yog ntu ntu Induction cua sov rauv , uas adopts cov qauv cua sov ntawm induction Cua Sov CEV, yog li ntawd tag nrho cov yeeb nkab seem tuaj yeem ua kom sov hauv txhua qhov kev qhia. Cov pa tiv thaiv tsis yog tsuas yog ua raws li txoj kev thaiv kom huab cua, tab sis kuj ua haujlwm ua cua txias ncig cua txias. Kev tsim kho cov qauv, kev nyab xeeb, txhim khu kev qha tswj fwm thiab kev saib xyuas yooj yim. Qhov kub sib txawv hauv lub cub hluav taws yog tswj tau nyob rau hauv ± 1-2 ℃.
Cov khoom lag luam tuaj yeem xaiv siv cov khoom siv ammonia decomposition los ua cov roj tiv thaiv lossis siv cov kaus poom hauv cov roj av raws li lawv qhov tseeb.
Txais tos rau nug peb!
Iris Liang
E-mail: Muag3 @ Hangaotech .com
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