Duplex Stainless Steel (DSS) ke mofuta oa tšepe e sa hloekang e nang le likarolo tse batlang li lekana tsa ferrite le austenite, 'me karolo e nyane hangata e etsa bonyane 30%.DSS ka tlwaelo e na le dikahare tsa chromium pakeng tsa 18% le 28% le dikahare tsa nickel pakeng tsa 3% le 10%.Litšepe tse ling tsa duplex li boetse li na le likarolo tsa alloying tse kang molybdenum (Mo), koporo (Cu), niobium (Nb), titanium (Ti), le nitrogen (N).
Sehlopha sena sa tšepe se kopanya litšobotsi tsa litšepe tsa austenitic le ferritic.Ha e bapisoa le litšepe tse sa hloekang tsa ferritic, DSS e na le polasetiki e phahameng le ho tiea, e haelloa ke mocheso oa kamore, 'me e bonts'a ho hanyetsa kutu le ho cheseha ho ntlafetseng.Ka nako e ts'oanang, e boloka brittleness ea 475 ° C le conductivity e phahameng ea mocheso oa litšepe tse sa hloekang tsa ferritic 'me e bontša superplasticity.Ha ho bapisoa le litšepe tse sa hloekang tsa austenitic, DSS e na le matla a holimo le ho hanyetsa ho hoholo ha khatello ea maikutlo le chloride.DSS e boetse e na le ts'ebetso e ntle haholo ea ho thibela kutu 'me e nkuoa e le tšepe e bolokang nickel.
Sebopeho le Mefuta
Ka lebaka la sebopeho sa eona sa mekhahlelo e 'meli ea austenite le ferrite, ka karolo e' ngoe le e 'ngoe e ikarabellang hoo e batlang e le halofo, DSS e bonts'a litšobotsi tsa litšepe tse sa hloekang tsa austenitic le ferritic.Matla a tlhahiso ea DSS a tloha ho 400 MPa ho isa ho 550 MPa, e leng habeli ho feta ea litšepe tse tloaelehileng tsa austenitic.DSS e na le boima bo phahameng, mocheso o tlase oa phetoho ea brittle, 'me e ntlafalitse haholo ho hanyetsa ho bola ha intergranular le ho cheseha ha ho bapisoa le litšepe tse sa hloekang tsa ferritic.E boetse e na le thepa ea tšepe e sa hloekang ea ferritic, joalo ka 475 ° C brittleness, conductivity e phahameng ea mocheso, coefficient e tlase ea katoloso ea mocheso, superplasticity le magnetism.Ha e bapisoa le litšepe tse sa hloekang tsa austenitic, DSS e na le matla a holimo, haholo-holo matla a ho kotula, 'me e ntlafalitse ho hanyetsa likoti, ho bola ha khatello ea maikutlo, le mokhathala oa kutu.
DSS e ka aroloa ka mefuta e mene ho latela sebopeho sa eona sa lik'hemik'hale: Cr18, Cr23 (Mo-free), Cr22, le Cr25.Mofuta oa Cr25 o ka aroloa hape ka litšepe tse tloaelehileng le tsa super duplex.Har'a tsena, mefuta ea Cr22 le Cr25 e sebelisoa haholo.Chaena, boholo ba limaraka tsa DSS tse amohetsoeng li hlahisoa Sweden, ho kenyeletsoa 3RE60 (mofuta oa Cr18), SAF2304 (mofuta oa Cr23), SAF2205 (mofuta oa Cr22), le SAF2507 (mofuta oa Cr25).
Mefuta ea Duplex Stainless Steel
1. Mofuta oa Alloy e tlase:E emetsoe ke UNS S32304 (23Cr-4Ni-0.1N), tšepe ena ha e na molybdenum 'me e na le Pitting Resistance Equivalent Number (PREN) ea 24-25.E ka nka sebaka sa AISI 304 kapa 316 lits'ebetsong tsa ho hanyetsa ho bola ha khatello ea maikutlo.
2. Mofuta oa Alloy e Bohareng:E emetsoe ke UNS S31803 (22Cr-5Ni-3Mo-0.15N), e nang le PREN ea 32-33.Ho hanyetsa ha kutu ho pakeng tsa AISI 316L le 6% Mo+N austenitic stainless steels.
3. Mofuta oa Alloy e Phahameng:Ka tloaelo e na le 25% Cr hammoho le molybdenum le nitrogen, ka linako tse ling koporo le tungsten.E emetsoe ke UNS S32550 (25Cr-6Ni-3Mo-2Cu-0.2N), e nang le PREN ea 38-39, tšepe ena e na le khanyetso e ntle ea kutu ho feta 22% Cr DSS.
4. Super Duplex Stainless Steel:E na le maemo a phahameng a molybdenum le naetrojene, e emetsoeng ke UNS S32750 (25Cr-7Ni-3.7Mo-0.3N), ka linako tse ling e boetse e na le tungsten le koporo, e nang le PREN e ka holimo ho 40. E loketse maemo a thata a mecha ea litaba, e fanang ka kutu e babatsehang le mechine. thepa, bapisoa le super austenitic litšepe stainless.
Mephato ea Duplex Stainless Steel naheng ea China
Tekanyetso e ncha ea Sechaena ea GB/T 20878-2007 "Mephato ea Tšepe e sa Tletseng le Chelete e Hanelang Mocheso le Motsoako oa Lik'hemik'hale" e kenyelletsa limaraka tse ngata tsa DSS, tse kang 14Cr18Ni11Si4AlTi, 022Cr19Ni5Mo3Si2N, le 12Cr21Ni5Ti.Ho feta moo, tšepe e tsebahalang ea 2205 duplex e lumellana le sehlopha sa Sechaena 022Cr23Ni5Mo3N.
Litšobotsi tsa Duplex Stainless Steel
Ka lebaka la sebopeho sa eona sa mekhahlelo e 'meli, ka ho laola ka nepo sebopeho sa lik'hemik'hale le ts'ebetso ea kalafo ea mocheso, DSS e kopanya melemo ea litšepe tse sa hloekang tsa ferritic le austenitic.E rua ho tiea le ho cheseha ho hoholo ha litšepe tsa austenitic tse sa jeleng paate le matla a phahameng le khanyetso ea chloride stress corrosion resistance ea litšepe tsa ferritic.Mehaho ena e phahameng e entse hore DSS e hole ka potlako joalo ka thepa ea sebopeho se chesehang ho tloha ka bo-1980, e bapise le litšepe tsa martensitic, austenitic le ferritic.DSS e na le litšobotsi tse latelang:
1. Chloride Stress Corrosion Resistance:DSS e nang le molybdenum e bonts'a khanyetso e ntle ea chloride stress corrosion maemong a tlase a khatello.Le hoja litšepe tse 18-8 tsa austenitic li atisa ho hlokofatsoa ke khatello ea maikutlo e senyehang ka har'a tharollo ea chloride e sa nke lehlakore ka holimo ho 60 ° C, DSS e sebetsa hantle libakeng tse nang le trace ea chloride le hydrogen sulfide, e leng se etsang hore e tšoanelehe bakeng sa li-exchangers tsa mocheso le mouoane.
2. Pitting Corrosion Resistance:DSS e na le khanyetso e ntle ea pitting corrosion.Ka Pitting Resistance Equivalent e tšoanang (PRE=Cr%+3.3Mo%+16N%), DSS le litšepe tse sa hloekang tsa austenitic li bonts'a menyetla e ts'oanang ea bohlokoa ea likoti.DSS's pitting le crevice corrosion resistance, haholo-holo mefuteng e phahameng ea chromium, e nang le naetrojene, e feta ea AISI 316L.
3. Corrosion Mokhathala le Wear Corrosion Resistance:DSS e sebetsa hantle libakeng tse itseng tse senyang, e etsa hore e tšoanele lipompo, li-valve le lisebelisoa tse ling tsa matla.
4. Thepa ea Mechini:DSS e na le matla a phahameng le matla a mokhathala, e nang le matla a ho kotuloa habeli ho feta 18-8 austenitic stainless steels.Boemong bo kentsoeng ka tharollo, bolelele ba eona bo fihla ho 25%, 'me boleng ba eona ba AK (V-notch) bo feta 100 J.
5. Weldability:DSS e na le weldability e ntle e nang le litšekamelo tse tlase tsa ho phatloha ho chesang.Preheating ka kakaretso ha e hlokehe pele ho tjheseletsa, mme kalafo ya mocheso ka morao ho weld ha e hlokahale, ho dumella ho tjheseletsa ka 18-8 austenitic stainless steels kapa carbon steels.
6. Ho sebetsa ho chesang:Low-chromium (18% Cr) DSS e na le mocheso o pharaletseng o chesang oa ho sebetsa le ho hanyetsa ka tlase ho feta 18-8 austenitic stainless steels, e lumellang ho pitika ka ho toba lipoleiti ntle le ho forging.High-chromium (25% Cr) DSS e thata hanyane mosebetsing o chesang empa e ka hlahisoa ka lipoleiti, lipeipi le lithapo.
7. Mosebetsi o Batang:DSS e bonts'a ho thatafala ha mosebetsi nakong ea ho sebetsa ho batang ho feta 18-8 austenitic stainless steels, e hlokang khatello e phahameng ea pele bakeng sa deformation nakong ea liphaephe le ho etsa poleiti.
8. Thermal Conductivity le Katoloso:DSS e na le conductivity e phahameng ea mocheso le li-coefficients tse fokolang tsa ho atolosa mocheso ha li bapisoa le litšepe tse sa hloekang tsa austenitic, e leng se etsang hore e tšoanelehe bakeng sa lisebelisoa tsa lesela le ho hlahisa lipoleiti tse kopantsoeng.E boetse e loketse bakeng sa li-tube cores tsa mocheso, tse nang le bokhoni bo phahameng ba phapanyetsano ea mocheso ho feta litšepe tsa austenitic stainless.
9. Brittleness:DSS e boloka litšekamelo tsa brittleness tsa litšepe tse sa jeleng tsa chromium ferritic tse phahameng 'me ha ea lokela ho sebelisoa mochesong o ka holimo ho 300°C.Ha litaba tsa chromium li le tlase ho DSS, ha ho bonolo ho ba le maemo a brittle joalo ka sigma phase.
Melemo ea Tlhahiso ea Womic Steel
Womic Steel ke moetsi ea ka sehloohong oa tšepe e sa hloekang ea duplex, e fanang ka lihlahisoa tse fapaneng tse kenyelletsang liphaephe, lipoleiti, litšepe le lithapo.Lihlahisoa tsa rona li khomarela litekanyetso tse kholo tsa machaba 'me li netefalitsoe ke ISO, CE, le API.Re ka amohela taolo ea motho oa boraro le tlhahlobo ea ho qetela, ho netefatsa hore maemo a holimo a ea fihlelleha.
Lihlahisoa tsa tšepe tse sa hloekang tsa Womic Steel li tsebahala ka:
Lisebelisoa tsa Raw tsa boleng bo holimo:Re sebelisa feela lisebelisoa tse ntle ka ho fetisisa tse tala ho netefatsa ts'ebetso e phahameng ea sehlahisoa.
Mekhoa e tsoetseng pele ea Tlhahiso:Mehaho ea rona ea morao-rao ea tlhahiso ea lihlahisoa le sehlopha se nang le phihlelo li re nolofalletsa ho hlahisa tšepe e sa hloekang ea duplex e nang le metsoako e nepahetseng ea lik'hemik'hale le thepa ea mechine.
Litharollo tse Customizable:Re fana ka mefuta e mengata ea boholo le litlhaloso ho finyella litlhoko tse khethehileng tsa bareki ba rona.
Taolo e Matla ea Boleng:Mekhoa ea rona e matla ea ho laola boleng e netefatsa hore sehlahisoa se seng le se seng se finyella litekanyetso tse phahameng ka ho fetisisa tsa bokhabane.
Lefatšeng ka bophara:Ka marang-rang a matla a ho romela thepa, Womic Steel e fana ka tšepe e sa hloekang e habeli ho bareki lefatšeng ka bophara, e tšehetsa liindasteri tse fapaneng ka thepa e tšepahalang le e sebetsang hantle.
Khetha Womic Steel bakeng sa litlhoko tsa hau tsa tšepe e sa hloekang ea duplex 'me u be le boleng bo ke keng ba lekanngoa le tšebeletso e re khethollang indastering.
Nako ea poso: Jul-29-2024