I-Duplex Stainless Steel (i-DSS) luhlobo lwensimbi engenasici equlethe malunga neengxenye ezilinganayo ze-ferrite kunye ne-austenite, kunye nesigaba esincinci senza ubuncinane ubuncinane be-30%.I-DSS idla ngokuba nomxholo wechromium phakathi kwe-18% kunye ne-28% kunye nomxholo we-nickel phakathi kwe-3% kunye ne-10%.Ezinye ii-duplex stainless steels nazo ziqulethe izinto ezixutywayo ezifana ne-molybdenum (Mo), ubhedu (Cu), i-niobium (Nb), i-titanium (Ti), kunye ne-nitrogen (N).
Olu didi lwentsimbi ludibanisa iimpawu ze-austenitic kunye ne-ferritic stainless steels.Xa kuthelekiswa neentsimbi ze-ferritic stainless, i-DSS ineplastiki ephezulu kunye nokuqina, ayinayo i-brittleness yobushushu begumbi, kwaye ibonisa ukuxhathisa kwe-intergranular corrosion kunye ne-weldability.Kwangaxeshanye, igcina i-475 ° C brittleness kunye ne-thermal conductivity ephezulu yeentsimbi ze-ferritic stainless kwaye ibonisa superplasticity.Xa kuthelekiswa neentsimbi ze-austenitic stainless, i-DSS inamandla aphezulu kwaye ingcono kakhulu ukumelana ne-intergranular kunye ne-chloride yoxinzelelo lwe-corrosion.I-DSS ikwanenkcenkce egqwesileyo yokuchasa umhlwa kwaye ithathwa njengentsimbi egcina i-nickel engatyiwa.
Ulwakhiwo kunye neentlobo
Ngenxa yobume besigaba se-austenite kunye ne-ferrite, kunye nesigaba ngasinye sokubala malunga nesiqingatha, i-DSS ibonisa iimpawu zombini ze-austenitic kunye ne-ferritic stainless steels.Amandla esivuno se-DSS asuka kwi-400 MPa ukuya kwi-550 MPa, ephindwe kabini kwiintsimbi eziqhelekileyo ze-austenitic stainless.I-DSS inokuqina okuphezulu, iqondo lobushushu elisezantsi le-brittle transition, kunye nokuphucula kakhulu ukuxhathisa kwe-intergranular corrosion kunye ne-weldability xa kuthelekiswa neentsimbi ezingenasici ze-ferritic.Ikwagcina ezinye iipropathi zensimbi engenasici, ezinje nge-475°C brittleness, high conductivity thermal conductivity, low thermal expansion coefficient, superplasticity, kunye nemagnetism.Xa kuthelekiswa ne-austenitic stainless steels, i-DSS inamandla aphezulu, ngakumbi amandla esivuno, kunye nokuphucula ukuxhathisa kwi-pitting, i-corrosion yoxinzelelo, kunye nokudinwa kwe-corrosion.
I-DSS inokuthi ihlelwe kwiindidi ezine ngokusekelwe kwimichiza yayo: i-Cr18, i-Cr23 (i-Mo-free), i-Cr22, kunye ne-Cr25.Uhlobo lwe-Cr25 lunokwahlulwa kwakhona lube ziintsimbi eziqhelekileyo kunye ne-super duplex ezingenasici.Phakathi kwezi, iintlobo ze-Cr22 kunye ne-Cr25 zisetyenziswa kakhulu.E-China, uninzi lwamabakala e-DSS amkelweyo aveliswa eSweden, kubandakanywa i-3RE60 (uhlobo lwe-Cr18), i-SAF2304 (uhlobo lwe-Cr23), i-SAF2205 (uhlobo lwe-Cr22), kunye ne-SAF2507 (uhlobo lwe-Cr25).
Iintlobo zeNtsimbi yeDuplex
1. Uhlobo lwe-Low-Alloy:Imelwe yi-UNS S32304 (23Cr-4Ni-0.1N), le nsimbi ayinayo i-molybdenum kwaye ine-Pitting Resistance Equivalent Number (PREN) ye-24-25.Ingathatha indawo ye-AISI 304 okanye i-316 kwizicelo zokumelana noxinzelelo lwe-corrosion.
2. Uhlobo lwe-Medium-alloy:Imelwe yi-UNS S31803 (22Cr-5Ni-3Mo-0.15N), kunye ne-PREN ye-32-33.Ukuxhatshazwa kwayo kwe-corrosion kuphakathi kwe-AISI 316L kunye ne-6% ye-Mo + N i-austenitic stainless steels.
3. Uhlobo lwe-High-Alloy:Ngokuqhelekileyo iqulethe i-25% yeCr kunye ne-molybdenum kunye ne-nitrogen, ngamanye amaxesha ubhedu kunye ne-tungsten.Imelwe yi-UNS S32550 (25Cr-6Ni-3Mo-2Cu-0.2N), ene-PREN ye-38-39, le ntsimbi inokumelana nokugqwala okungcono kune-22% Cr DSS.
4. Super Duplex Stainless Steel:Iqukethe amanqanaba aphezulu e-molybdenum kunye ne-nitrogen, emelwe yi-UNS S32750 (25Cr-7Ni-3.7Mo-0.3N), ngamanye amaxesha iqulethe i-tungsten kunye nobhedu, kunye ne-PREN engaphezulu kwe-40. Ifanelekile kwiimeko zeendaba ezinzima, ezinikezela ngokugqwesa okugqwesileyo kunye noomatshini. iipropathi, xa zithelekiswa neentsimbi ze-austenitic ezingenasici.
AmaBanga eDuplex Steel engatyiwa eTshayina
Umgangatho omtsha waseTshayina we-GB/T 20878-2007 "AmaBanga eStainless kunye ne-Heat-Resistant Steel kunye ne-Chemical Composition" ibandakanya amabakala amaninzi e-DSS, afana ne-14Cr18Ni11Si4AlTi, 022Cr19Ni5Mo3Si2N, kunye ne-12Cr21Ni5Ti.Ukongezelela, i-2205 duplex steel eyaziwayo ihambelana nebakala lesiTshayina 022Cr23Ni5Mo3N.
Iimpawu zeDuplex Stainless Steel
Ngenxa yobume besigaba sesibini, ngokulawula ngokufanelekileyo ukubunjwa kweekhemikhali kunye nenkqubo yokunyanga ukushisa, i-DSS idibanisa iingenelo zombini ze-ferritic kunye ne-austenitic stainless steels.Izuza ukuqina okugqwesileyo kunye ne-weldability ye-austenitic stainless steels kunye namandla aphezulu kunye ne-chloride yoxinzelelo lwe-corrosion resistance of steels stainless ferritic.Ezi zakhiwo ziphezulu zenze ukuba i-DSS ikhule ngokukhawuleza njengento enokuweldable yolwakhiwo ukusukela ngeminyaka yoo-1980, ithelekiseka neentsimbi ze-martensitic, austenitic, kunye ne-ferritic stainless.I-DSS inezi mpawu zilandelayo:
1. Ukunyangwa koxinzelelo lweChloride kwiCorrosion:I-DSS ene-Molybdenum ibonisa ukuxhathisa okugqwesileyo kwi-chloride yoxinzelelo lwe-corrosion kumanqanaba aphantsi oxinzelelo.Ngelixa i-18-8 i-austenitic stainless steels ivame ukubandezeleka ngenxa yoxinzelelo lwe-corrosion cracking kwi-neutral chloride solutions ngaphezu kwe-60 ° C, i-DSS yenza kakuhle kwiindawo eziqulethe umkhondo we-chlorides kunye ne-hydrogen sulfide, okwenza ukuba ilungele ukutshintshiselana kobushushu kunye ne-evaporators.
2. Ukuchasa ukuRhwakala kwePitting:I-DSS inokumelana ne-corrosion ye-pitting ebalaseleyo.Ngokulinganayo kwe-Pitting Resistance Equivalent (PRE=Cr%+3.3Mo%+16N%), i-DSS kunye ne-austenitic stainless steels zibonisa amandla afanayo abalulekileyo okugoba.I-DSS's pitting and crevice corrosion resistance, ingakumbi kwi-high-chromium, iintlobo ezine-nitrogen, zidlula ezo ze-AISI 316L.
3. Ukudinwa kukuMhlwa kunye nokuNxina nokuNxiba:I-DSS iqhuba kakuhle kwiindawo ezithile ezidlekayo, iyenza ilungele iimpompo, iivalvu, kunye nezinye izixhobo zamandla.
4. IiPropati zoomatshini:I-DSS inamandla aphezulu kunye namandla okudinwa, ngamandla okuvelisa ngokuphindwe kabini i-18-8 austenitic stainless steels.Kwimeko yesisombululo-i-annealed, ubude bayo bufikelela kwi-25%, kwaye ixabiso layo lokuqina i-AK (V-notch) lidlula i-100 J.
5. Ukuwelda:I-DSS ine-weldability elungileyo kunye nemikhwa ephantsi eshushu yokuqhekeka.Ukufudumala ngokuqhelekileyo akufuneki phambi kwe-welding, kwaye unyango lwe-post-weld heat aludingekile, luvumela ukudibanisa nge-18-8 austenitic stainless steels okanye i-carbon steels.
6. Ukusebenza okushushu:I-chromium ephantsi (i-18% Cr) i-DSS inoluhlu olubanzi lobushushu bokusebenza kunye nokuchasana okuphantsi kune-18-8 i-austenitic stainless steels, evumela ukuqengqeleka ngokuthe ngqo kwiiplate ngaphandle kokwenza.I-High-chromium (25% Cr) i-DSS icela umngeni kancinane kumsebenzi oshushu kodwa inokuveliswa kwiipleyiti, imibhobho, kunye neengcingo.
7. Ukusebenza Okubandayo:I-DSS ibonisa ukuqina okukhulu komsebenzi ngexesha lokusebenza okubandayo kune-18-8 austenitic stainless steels, efuna uxinzelelo oluphezulu lokuqala lokuguqulwa ngexesha lokwenziwa kombhobho kunye nepleyiti.
8. I-Thermal Conductivity kunye noKwandiswa:I-DSS ine-conductivity ephezulu ye-thermal kunye ne-coefficients ephantsi yokwandiswa kwe-thermal xa kuthelekiswa ne-austenitic stainless steels, eyenza ifaneleke kwizixhobo ze-lining kunye nokuvelisa iipleyiti ezidibeneyo.Ikwafanelekile kwi-tube cores exchanger exchanger, enomgangatho ophezulu wokutshintshiselana ngobushushu kuneentsimbi ze-austenitic ezingenasici.
9. Ubuqhophololo:I-DSS igcina i-brittleness threncies of high-chromium ferritic stainless steels kwaye ayifanelekanga ukusetyenziswa kumaqondo obushushu angaphezu kwe-300 ° C.Okuya kusezantsi komxholo wechromium kwi-DSS, kokukhona kungathandeki kakhulu kwizigaba ezibhityileyo ezifana nesigaba se-sigma.
Izinto eziluncedo kwimveliso ye-Womic Steel
I-Womic Steel yinkampani ekhokelayo ekuveliseni i-duplex steel stainless steel, ibonelela ngoluhlu olubanzi lweemveliso eziquka imibhobho, iipleyiti, imivalo kunye neengcingo.Iimveliso zethu zihambelana nemigangatho emikhulu yamazwe ngamazwe kwaye ziqinisekisiweyo ze-ISO, CE, kunye ne-API.Singakwazi ukwamkela ukubeka iliso kumntu wesithathu kunye nokuhlolwa kokugqibela, siqinisekisa ukuba imigangatho ephezulu yomgangatho iyafezekiswa.
Iimveliso zentsimbi engatyiwa zimbini zeWomic Steel zaziwa ngokwazo:
IiMathiriyeli ezikrwada ezikwiMgangatho oPhezulu:Sisebenzisa kuphela eyona mathiriyeli ikrwada ukuqinisekisa ukusebenza kwemveliso ephezulu.
ubuChwephesha bokuVelisa obukwinqanaba eliphezulu:Izixhobo zethu zokuvelisa i-state-of-art kunye neqela elinamava lisenza sikwazi ukuvelisa i-duplex steel stainless kunye neengqungquthela zeekhemikhali ezichanekileyo kunye neempawu zemishini.
Izisombululo eziLungisayo:Sinikezela ngoluhlu olubanzi lobungakanani kunye neenkcukacha zokuhlangabezana neemfuno ezithile zabathengi bethu.
Ulawulo loMgangatho olungqongqo:Iinkqubo zethu ezingqongqo zolawulo lomgangatho ziqinisekisa ukuba imveliso nganye ihlangabezana neyona migangatho iphezulu yokugqwesa.
Ukufikelelwa kweHlabathi:Ngothungelwano olomeleleyo lokuthumela ngaphandle, iWomic Steel ibonelela ngentsimbi ephindwe kabini kubathengi kwihlabathi liphela, ixhasa imizi-mveliso eyahlukeneyo ngezinto ezithembekileyo nezisebenza kakhulu.
Khetha i-Womic Steel kwiimfuno zakho zensimbi engenasici kwaye ube namava omgangatho ongenakuthelekiswa nanto kunye nenkonzo esenza sahluke kushishino.
Ixesha lokuposa: Jul-29-2024