Duplex Stainless Steel (DSS) imhando yesimbi isina tsvina ine zvikamu zvakaenzana zveferrite uye austenite, nechikamu chidiki chinowanzo gadzira 30%.DSS kazhinji ine chromium zviri pakati pe18% ne28% uye nickel yemukati iri pakati pe3% ne10%.Mamwe masimbi asina duplex ane alloying zvinhu zvakaita se molybdenum (Mo), mhangura (Cu), niobium (Nb), titanium (Ti), uye nitrogen (N).
Ichi chikamu chesimbi chinosanganisa maitiro eese austenitic uye ferritic Stainless simbi.Kuenzaniswa neferritic Stainless simbi, DSS ine yakakwira plastiki uye kuoma, haina kamuri tembiricha brittleness, uye inoratidza yakagadziridzwa intergranular corrosion resistance uye weldability.Panguva imwecheteyo, inochengetedza 475 ° C brittleness uye yakakwirira yekupisa conductivity yeferritic stainless steels uye inoratidza superplasticity.Kana ichienzaniswa neaustenitic simbi isina tsvina, DSS ine simba repamusoro uye zvakanyanya kuramba zvirinani kune intergranular uye chloride stress corrosion.DSS zvakare ine yakanakisa pitting corrosion resistance uye inonzi nickel-saving stainless simbi.
Chimiro uye Mhando
Nekuda kweiyo mbiri-chikamu chimiro che austenite uye ferrite, ine chikamu chimwe nechimwe accounting inosvika hafu, DSS inoratidza maitiro eese ari maviri austenitic uye ferritic simbi isina tsvina.Simba regoho reDSS rinobva pa400 MPa kusvika pa550 MPa, inova yakapetwa kaviri yeakajairika austenitic simbi isina tsvina.DSS ine kuomarara kwepamusoro, yakadzika brittle shanduko tembiricha, uye yakanyanya kunatsiridza intergranular corrosion resistance uye weldability zvichienzaniswa neferritic stainless steels.Iyo zvakare inochengeta imwe ferritic Stainless simbi zvivakwa, senge 475 ° C brittleness, yakakwirira yekupisa conductivity, yakaderera thermal yekuwedzera coefficient, superplasticity, uye magnetism.Kana ichienzaniswa neaustenitic stainless simbi, DSS ine simba repamusoro, kunyanya goho resimba, uye nekunatsiridza kuramba kugomba, kushushikana kwecorrosion, uye kuneta kwekuora.
DSS inogona kuiswa mumhando ina zvichienderana nemakemikari ayo: Cr18, Cr23 (Mo-yemahara), Cr22, uye Cr25.Iyo Cr25 mhando inogona kukamurwazve kuita yakajairwa uye super duplex simbi isina tsvina.Pakati peizvi, Cr22 uye Cr25 marudzi anonyanya kushandiswa.MuChina, mazhinji emagiredhi eDSS akatorwa anogadzirwa muSweden, anosanganisira 3RE60 (Cr18 type), SAF2304 (Cr23 type), SAF2205 (Cr22 type), uye SAF2507 (Cr25 type).
Mhando dzeDuplex Stainless Steel
1. Low-Alloy Type:Inomiririrwa neUNS S32304 (23Cr-4Ni-0.1N), iyi simbi haina molybdenum uye ine Pitting Resistance Equivalent Number (PREN) ye24-25.Inogona kutsiva AISI 304 kana 316 mukushushikana corrosion resistance application.
2. Medium-Alloy Type:Inomiririrwa neUNS S31803 (22Cr-5Ni-3Mo-0.15N), ine PREN ye32-33.Kupokana kwayo kwekuora kuri pakati peAISI 316L uye 6% Mo+N austenitic stainless steels.
3. High-Alloy Type:Kazhinji ine 25% Cr pamwe ne molybdenum uye nitrogen, dzimwe nguva mhangura uye tungsten.Inomiririrwa neUNS S32550 (25Cr-6Ni-3Mo-2Cu-0.2N), ine PREN ye 38-39, iyi simbi ine nani inodzivirira kuparara kupfuura 22% Cr DSS.
4. Super Duplex Stainless Simbi:Iine yakakwirira ye molybdenum uye nitrogen, inomiririrwa neUNS S32750 (25Cr-7Ni-3.7Mo-0.3N), dzimwe nguva inewo tungsten nemhangura, ine PREN inopfuura 40. Inokodzera mamiriro akaoma enhau, achipa corrosion yakaisvonaka uye mechanical. zvivakwa, zvakaenzana ne super austenitic stainless simbi.
Magiredhi eDuplex Stainless Steel muChina
Iyo itsva Chinese standard GB/T 20878-2007 "Stainless uye Heat-Resistant Steel Grades uye Chemical Composition" inosanganisira akawanda maDSS mamakisi, akadai 14Cr18Ni11Si4AlTi, 022Cr19Ni5Mo3Si2N, uye 12Cr21Ni5Ti.Pamusoro pezvo, iyo inozivikanwa 2205 duplex simbi inoenderana neChinese giredhi 022Cr23Ni5Mo3N.
Hunhu hweDuplex Stainless Steel
Nekuda kwemaitiro ayo maviri-chikamu, nekudzora nemazvo kuumbwa kwemakemikari uye kupisa kupisa maitiro, DSS inosanganisa zvakanakira zvese ferritic uye austenitic simbi isina tsvina.Inogara nhaka yakanakisa kuomarara uye weldability yeaustenitic Stainless simbi uye kusimba kwepamusoro uye chloride kushushikana kwecorrosion resistance yeferritic Stainless steels.Aya epamusoro zvivakwa akaita kuti DSS ikurumidze kukura sechinhu chinosungirirwa chiumbwa kubva kuma1980s, ichifananidzwa nemartensitic, austenitic, uye ferritic stainless simbi.DSS ine zvinotevera maitiro:
1. Chloride Stress Corrosion Resistance:Molybdenum-ine DSS inoratidzira kwakanakisa kuramba kune chloride kusagadzikana corrosion pane yakaderera kusagadzikana mazinga.Kunyange zvazvo 18-8 austenitic stainless steels inowanzotambura nekushungurudzika kwekuora kwekuputika mune neutral chloride solutions pamusoro pe60 ° C, DSS inoita zvakanaka munzvimbo dzine trace uwandu hwekloridi uye hydrogen sulfide, zvichiita kuti ive yakakodzera kune zvinopisa kupisa uye evaporators.
2. Pitting Corrosion Resistance:DSS ine yakanakisa pitting corrosion resistance.Nezvimwechetezvo Pitting Resistance Equivalent (PRE=Cr%+3.3Mo%+16N%), DSS uye austenitic stainless steels zvinoratidza zvakafanana zvakakosha gomba zvinogona.DSS's pitting uye crevice corrosion resistance, kunyanya muhigh-chromium, nitrogen-ine marudzi, inodarika iyo AISI 316L.
3. Corrosion Kuneta uye Wear Corrosion Resistance:DSS inoita zvakanaka mune dzimwe nzvimbo dzinoparadza, zvichiita kuti ive yakakodzera pombi, mavharuvhu, uye mamwe magetsi emagetsi.
4. Mechanical Properties:DSS ine simba rakakwirira uye kuneta simba, ine simba regoho rakapetwa kaviri kune 18-8 austenitic stainless steels.Mumamiriro ekugadzirisa-annealed, kureba kwayo kunosvika 25%, uye kuoma kwayo kukosha AK (V-notch) inodarika 100 J.
5. Weldability:DSS ine yakanaka weldability ine yakaderera inopisa yekupwanya maitiro.Preheating kazhinji haidiwe pamberi pewelding, uye post-weld kupisa kurapwa hakuna kufanira, kubvumira welding ne18-8 austenitic Stainless simbi kana kabhoni simbi.
6. Kupisa Kushanda:Yakaderera-chromium (18% Cr) DSS ine yakafararira inopisa yekushanda tembiricha uye yakaderera kuramba pane 18-8 austenitic Stainless simbi, inobvumira kuumburuka yakananga mundiro pasina kuforoma.Yakakwira-chromium (25% Cr) DSS inonyanya kunetsa kubasa rinopisa asi inogona kugadzirwa kuita mahwendefa, pombi, uye waya.
7. Kutonhora Kushanda:DSS inoratidzira basa rakakura kuoma panguva yekushanda kunotonhora kupfuura 18-8 austenitic stainless simbi, inoda yakakwira yekutanga kushushikana kwe deformation panguva yekuumbwa kwepombi uye ndiro.
8. Thermal Conductivity uye Kuwedzera:DSS ine yakakwirira yekupisa conductivity uye yakaderera kupisa kwekuwedzera coefficients kana ichienzaniswa neaustenitic simbi isina tsvina, ichiita kuti ive yakakodzera midziyo yekuisa uye kugadzira mahwendefa akaumbwa.Iyo zvakare yakanakira kupisa exchanger chubhu cores, ine yakanyanya kupisa yekutsinhana kunyatsoshanda pane austenitic simbi isina tsvina.
9. Brittleness:DSS inoramba iine brittleness maitiro ehigh-chromium ferritic stainless steels uye haina kukodzera kushandiswa patembiricha iri pamusoro pe300°C.Iyo yakadzika iyo chromium yemukati muDSS, iyo isinganyanyike ndeyekuita brittle zvikamu senge sigma phase.
Womic Steel's Production Advantages
Womic Simbi inotungamira kugadzira duplex simbi isina tsvina, ichipa huwandu hwakakwana hwezvigadzirwa zvinosanganisira mapaipi, marata, mabara, uye waya.Zvigadzirwa zvedu zvinoomerera kune makuru epasi rose zviyero uye ISO, CE, uye API inosimbiswa.Isu tinokwanisa kugashira chechitatu-bato kutarisisa uye kuongorora kwekupedzisira, kuve nechokwadi chemhando yepamusoro miitiro inozadzikiswa.
Zvigadzirwa zveWomic Steel's duplex Stainless simbi zvinozivikanwa nezvazvo:
High-Quality Raw Materials:Isu tinoshandisa chete akanakisa zvigadzirwa kuti tive nechokwadi chepamusoro chigadzirwa kuita.
Maitiro ekugadzira epamusoro:Nzvimbo dzedu dzemazuva ano dzekugadzira uye timu ine ruzivo inotigonesa kugadzira duplex Stainless simbi ine chaiwo maumbirwo emakemikari uye ma mechanical properties.
Customizable Solutions:Isu tinopa huwandu hwakawanda hwehukuru uye zvakatemwa kuti tisangane nezvinodiwa nevatengi vedu.
Stringent Quality Control:Yedu yakaomesesa yemhando yekudzora maitiro ekuona kuti chigadzirwa chega chega chinosangana nemhando yepamusoro yekunaka.
Global Reach:Iine network yakasimba yekutengesa kunze kwenyika, Womic Steel inopa duplex simbi isina tsvina kune vatengi pasi rese, inotsigira maindasitiri akasiyana nezvinhu zvakavimbika uye zvepamusoro-soro.
Sarudza Womic Simbi kune yako duplex Stainless simbi zvinodiwa uye unzwe isingaenzaniswi mhando uye sevhisi inotiisa parutivi muindasitiri.
Nguva yekutumira: Jul-29-2024