Ukuqonda i-2507 Umlwi Wokugqwala Ogqwesileyo

Intsimbi engagqwaliyo ye-2507 super duplex ifumene udumo lwayo njengomlwi wokugqwala ogqwesileyo. Iresiphi yayo ekhethekileyo yeekhemikhali inamanqanaba aphezulu e-chromium, i-molybdenum, kunye ne-nitrogen. Olu lwakhiwo ludala isakhiwo esincinci esilinganayo samanqanaba amabini. Esi sakhiwo sinika izixhobo ezifana neIbha ejikelezileyo ye-2507 S32750 Super DuplexUkhuseleko olukhethekileyo kwimingxunya, ukugqwala kwemiqolo, kunye nokuqhekeka koxinzelelo lokugqwala. Isebenza ngokuthembekileyo kwiindawo ezinobundlongondlongo ezifana namanzi olwandle kunye nezityalo zokucubungula iikhemikhali, apho izixhobo ezisemgangathweni ziyasilela khona.

Izinto ezibalulekileyo ekufuneka ziqwalaselwe

• I-2507 super duplex steel ilwa kakuhle kakhulu nokugqwala. Inezithako ezikhethekileyo ezifana ne-chromium, i-molybdenum, kunye ne-nitrogen. Ezi ziyenza yomelele ekugqwaleni nasekuqhekekeni.
• Le ntsimbi inesakhiwo esikhethekileyo esinamacandelo amabini. Esi sakhiwo siyenza yomelele kwaye iqine. Isebenza kakuhle kwiindawo ezinzima njengamanzi olwandle.
• Intsimbi ye-2507 inamandla kakhulu kunentsimbi eqhelekileyo engagqwaliyo. Ikwamelana nokugqwala ngcono. Yiyo loo nto isetyenziswa kwimisebenzi enzima efana nee-oyile rigs kunye nezityalo zeekhemikhali.
• Ukusebenzisa intsimbi ye-2507 kubiza kakhulu ekuqaleni. Kodwa ihlala ixesha elide. Ifuna ukulungiswa okuncinci. Oku konga imali kangangeminyaka emininzi.

Yintoni echaza i-2507 Super Duplex Steel?

Ukusebenza okugqwesileyo kweIntsimbi ye-2507 super duplexIvela kwiimpawu ezimbini eziphambili: ukwakheka kwayo okuchanekileyo kweekhemikhali kunye nolwakhiwo lwayo lwangaphakathi olukhethekileyo. Ezi zinto zisebenza kunye ukwenza izinto ezilungiselelwe iimeko ezinzima.

Iresiphi yeKhemikhali yokuxhathisa

Amandla e-alloy aqala ngomxube othile wezinto. Amanqanaba aphezulu e-chromium, i-molybdenum, kunye ne-nitrogen zezona zinto ziphambili ezibangela amandla ayo okulwa nokugqwala. Imigangatho yeshishini ichaza ezi zinto zibalulekileyo ngaphakathi kumanqanaba aqinileyo ukuqinisekisa ukusebenza kakuhle.

Le fomula ityebileyo ihlukanisa izinto ezisetyenzisiweyo kwezinye izintoamabanga e-duplexUmzekelo, xa kuthelekiswa nomgangatho oqhelekileyo we-2205, i-2507 inamanqanaba aphezulu kakhulu ezi zinto zibalulekileyo ezimelana nokugqwala.

Inzuzo yeSiseko seMigangatho esiPhakathi ezimbini

Ngaphandle kwekhemikhali yayo, ulwakhiwo lwangaphakathi lwentsimbi lubonelela ngenzuzo ecacileyo. Inesakhiwo esincinci esilinganayo esinezigaba ezimbini, esiqulethe phantse iinxalenye ezilinganayo ze-austenite kunye ne-ferrite.

Ithetha ntoni le nto?
Olu lwakhiwo lubini ludibanisa iipropati ezilungileyo kuzo zombini izigaba. Inxalenye ye-ferritic inika amandla aphezulu kunye nokumelana nokuqhekeka kwe-stress corrosion, ngelixa inxalenye ye-austenitic inika ukuqina okuhle kunye nokumelana nokuqhekeka ngokubanzi.

Olu lwakhiwo lulungeleleneyo aluyongozi. Iinjineli ziyila olu lwakhiwo ukuze zisebenze kakuhle. Ukudibana kwezigaba ze-austenitic kunye ne-ferritic kuphazamisa ngempumelelo ukuqhubeka kweentanda. Le ndlela inika izinto ukhuseleko lwazo oluphezulu ekuqhekekeni koxinzelelo, indlela eqhelekileyo yokusilela kwiindawo ezityebileyo nge-chloride. Isiphumo sisixhobo esomeleleyo esigcina ukuthembeka kwaso apho ezinye zingaphumeleli khona.

Iipropati Zokusebenza Eziphambili ze-2507

Udumo lwentsimbi ye-2507 super duplex lwakhiwe kwisiseko seempawu zokusebenza ezilinganisekayo nezibalaseleyo. Ikhemistri yayo ephucukileyo kunye nesakhiwo sayo esincinci ziguqulela ngqo kumandla aphezulu oomatshini, ukumelana nokugqwala okulinganiselweyo, kunye noluhlu lobushushu oluthembekileyo lokusebenza. Ezi mpawu ziyenza ibe yinto ekhethwayo kwizicelo zoshishino ezifuna kakhulu.

Amandla Oomatshini Aphezulu

I-Super duplex steel 2507 inamandla amangalisayo oomatshini, idla ngokuphindwe kabini kunalawo eentsimbi eziqinileyo ze-austenitic stainless steels ezifana ne-316L. Olu lwalamano luphezulu lokuqina nobunzima lubonelela ngenzuzo ebalulekileyo yoyilo. Iinjineli zingasebenzisa amacandelo amancinci ezinto ngaphandle kokubeka emngciphekweni ukuthembeka kwesakhiwo. Olu buchule lukhokelela kwiinxalenye ezinobunzima obulula kunye nokonga iindleko ezinokubakho kwizinto kunye nezakhiwo ezixhasayo.

I-alloy ifumana amandla okuvelisa amangalisayo amalunga ne-550 MPa (80 ksi) kunye namandla okutsalwa angaphezulu kwe-800 MPa (116 ksi). La mandla aphezulu aqinisekisa ukuba izixhobo zinokumelana noxinzelelo olukhulu kunye nemithwalo enzima yoomatshini.

La mandla angaphakathi, kunye nokumelana kwawo nokugqwala okugqwesileyo, kubonelela ngomgangatho wokuthembeka ongenakuthelekiswa nezinye izixhobo kwiimeko zokhuseleko olunamandla.

i-Corrosion Resistance Metrics (PREN)

Iinjineli zisebenzisa i-metric ethile ukuqikelela nokuthelekisa ukumelana nokugqwala kwe-pitting kweentsimbi ezingenanto. Le metric yi-Pitting Resistance Equivalent Number (PREN). Ixabiso eliphezulu le-PREN libonisa ukumelana okukhulu nokugqwala kwe-pitting kwindawo ethile, ngakumbi kwi-chloride.

Ibalwa njani i-PREN?
Ifomula eqhelekileyo yoshishino lweentsimbi ezingenasici ze-duplex yile:I-PREN = %Cr + 3.3(%Mo) + 16(%N)Le fomula ibonisa indlela i-chromium (Cr), i-molybdenum (Mo), kunye ne-nitrogen (N) nganye enegalelo ngayo kubuchule bokuzikhusela bentsimbi.

Ngenxa yokwakheka kwayo okutyebileyo kweekhemikhali, intsimbi ye-2507 super duplex ifumana ixabiso le-PREN eliphezulu kakhulu kunezinye ii-alloys eziqhelekileyo. Olu vavanyo luphezulu luqinisekisa imeko yayo njengomdlali ophambili kwiindawo ezityebileyo nge-chloride.

Eli xabiso liphezulu le-PREN lithetha ngokuthe ngqo ukusebenza okuthembekileyo kwizicelo ezifana nezixhobo ezingaphantsi kolwandle kunye nezityalo zokususa ityuwa emanzini, apho ukumelana nokugrumba kubalulekile ebomini benkonzo yexesha elide.

Uluhlu lobushushu bokusebenza olukhuselekileyo

Ulwakhiwo oluncinci lwezigaba ezibini lwale superintsimbi ye-duplexilawula ubushushu bayo obusebenzayo. Le nto igcina iipropati zayo ezibalaseleyo zoomatshini kunye nokumelana nokugqwala kumaqondo obushushu afikelela kwi-300°C (572°F).

Nangona kunjalo, ukuvezwa ixesha elide kumaqondo obushushu angaphezu kwalo mda kunokukhokelela ekwakhiweni kwezigaba zokubhitya ngaphakathi kwesakhiwo esincinci. Olu tshintsho lunokunciphisa ukuqina kwezinto kunye nokumelana nokugqwala. Kwicala elisezantsi, i-alloy igcina ukuqina okuhle ukuya kuthi ga kwi -50°C (-58°F), nangona inokuba namava otshintsho oluvela kwi-ductile ukuya kwi-brittle kumaqondo obushushu aphantsi kakhulu e-cryogenic. Ukusebenza ngaphakathi kweli festile lobushushu elichaziweyo kubalulekile ukuqinisekisa ukuba izinto zinikezela amandla azo okusebenza ngokupheleleyo.

Isetyenziswa phi i-2507?

Iimpawu ezibalaseleyo zeIntsimbi ye-2507 super duplexyenza ukuba ibe yinto ebalulekileyo kumashishini apho ukusilela kwezinto kungeyondlela ifanelekileyo. Ukudibana kwayo namandla aphezulu kunye nokumelana nokugqwala okuphezulu kuyivumela ukuba isebenze ngokuthembekileyo kwezinye zezona ndawo zinobutshaba kwihlabathi. Iinjineli zichaza le ngxubevange kwizicelo ezibalulekileyo kuzo zonke iindawo zeoyile negesi, zaselwandle, kunye nezokucubungula iikhemikhali.

Izixhobo ze-oyile negesi ezingaphantsi kolwandle

Ishishini leoyile negesi elwandle olunzulu lisebenza phantsi kweemeko ezinzima kakhulu. Uxinzelelo oluphezulu, amaqondo obushushu aphantsi, kunye nokuvezwa rhoqo kumanzi olwandle arhabaxa kudala imeko-bume enzima kuyo nayiphi na into. Intsimbi ye-Super duplex igqwesile apha, inika ukuqina okufunekayo kokufakelwa kwexesha elide emanzini angaphantsi kolwandle. Amandla ayo aphezulu avumela izinto ezikhaphukhaphu, inzuzo ebalulekileyo kwiiprojekthi zamanzi anzulu.

Ingongoma yetyala:Inkampani yeoyile yaseKhanada isebenzise ngempumelelo iSuper Duplex Stainless Steel 2507 kwipayipi kwindawo yeoyile eselunxwemeni kufutshane neNewfoundland. Olu khetho lujongane ngqo nomngeni omkhulu wokugqwala kwamanzi olwandle, nto leyo ebonisa ixabiso lezinto ezisetyenziswa emanzini anzulu.

Izixhobo eziqhelekileyo zangaphantsi kolwandle ezixhamla kule alloy iphambili ziquka:

• Iinqanawa ezinkulu kunye nemibhobho engaphantsi kolwandle
• Iiflowlines kunye nee-risers
• Ii-Umbilicals kunye neenkqubo zokubopha
• Izihlanganisi zangaphantsi kolwandle

Izityalo zaselwandle kunye nezityalo zokukhupha ityuwa emanzini

Iindawo zaselwandle kunye neenkqubo zokukhupha ityuwa zidlala umlo oqhubekayo nxamnye nokugqwala okubangelwa yi-chloride. Izityalo ze-reverse osmosis (RO) zamanzi olwandle, ngokukodwa, zifuna izinto ezinokumelana namanzi anetyuwa eninzi xa kuxinzelelo olukhulu. I-alloy ye-2507 sisisombululo esifanelekileyo kwezi meko zinzima.

Izinto eziphambili kwiimpompo ezinoxinzelelo oluphezulu kwiinkqubo ze-RO zamanzi olwandle zihlala zakhiwe ngale ntsimbi iphambili ene-duplex. Ukuqina kwayo kuqinisekisa ukusebenza okuthembekileyo kwaye kwandisa ubomi benkonzo yezixhobo ezibalulekileyo. Le nto isetyenziswa rhoqo kwi:

• Imibhobho enoxinzelelo oluphezulu kunye neenqanawa eziphatha amanzi olwandle kunye netyuwa
• Izixhobo zempompo kunye neekhabhathi ezivezwe kumanzi arhabaxa
• Iinkqubo ezisebenza kwiimeko ezinosawoti ophezulu kunye noxinzelelo oluphezulu

Ukucubungula iikhemikhali ngendlela ebukhali

Izityalo zokucubungula iikhemikhaliiphatha uluhlu olubanzi lwezinto ezibolayo, ukusuka kwiiasidi ezinamandla ukuya kwizisombululo ezityebileyo zekloridi. Ulwakhiwo lwe-super duplex lwe-2507 lubonelela ngokusebenza okugqwesileyo kwezi ndawo zinzima kakhulu. Ibonisa ukumelana okugqwesileyo nokubola okufanayo okuvela kwiiasidi ezingaphiliyo ezifana ne-sulfuric kunye ne-hydrochloric acid, nokuba zingcoliswe ziikloridi.

Ubusazi?
Olu hlobo lwentsimbi lubonisa ukumelana okuphezulu nee-organic acids, ezifana nezo zifumaneka kwizityalo ze-terephthalic acid. Ukusebenza kwayo kuyenza ibe lukhetho olukhuphisanayo kunezinye ii-austenitic kunye nee-nickel alloy ezininzi.

Amandla ayo okumelana nokugqwala kwendawo abaluleke kakhulu. Le nto inobushushu obubalulekileyo bokufaka imingxuma obumalunga ne-185°F (85°C) kwiindawo ezinekloride, obungcono kakhulu kuneentsimbi zesiqhelo ezingenasici. Oku kuyenza ibe yinto ethembekileyo kwizixhobo ezibalulekileyo zezityalo, kuquka:

• Ii-reactors kunye neenqanawa zoxinzelelo
• Izitshintshi zobushushu kunye nezikhuseli
• Iitanki zokugcina izinto
• Iinkqubo zombhobho

Izinto Ezibalulekileyo Omele Uziqwalasele Xa Usebenzisa i-2507

Nangona ukusebenza kwentsimbi ye-super duplex kungenakuthelekiswa nanto kwiindawo ezininzi, uhlobo lwayo olukhethekileyo lufuna iindlela ezithile zokwenza kunye nokuqonda ngokucacileyo iprofayili yayo yeendleko kunye nenzuzo. Ukuphathwa ngokufanelekileyo kuqinisekisa ukuba izinto zinikezela ngamandla azo apheleleyo.

Iindlela ezilungileyo zokuWelda kunye nokuShiniza

Ukwenziwa kwale alloy esebenza kakhulu kufuna ukuchaneka. Ulwakhiwo lwayo olunezigaba ezibini lunovelwano kwimijikelo yobushushu, nto leyo eyenza ukuba iinkqubo zokuwelda ezilawulwayo zibe yimfuneko.

Izikhokelo zokuWelda
Abathungi kufuneka balawule ubushushu ngononophelo, ngesiqhelo ngaphakathi koluhlu lwe-0.5–2.0 kJ/mm. Ubushushu obuphakathi kwee-weld passes, obaziwa ngokuba yi-interpass temperature, akufuneki budlule kwi-150°C (300°F) ukuze kugcinwe ulungelelwano lwesakhiwo sentsimbi.

Ukukhetha intsimbi yokuzalisa efanelekileyo kubalulekile nakwi-weld ephumelelayo. Iindlela ezicetyiswayo ziquka:

• Isinyithi sokugcwalisa esingu-2507/P100 ukuqinisekisa isakhiwo esifanelekileyo se-duplex weld.
• Izizalisi ze-nickel alloy, ezifana nohlobo lwe-C276, zokuphucula ukumelana nokugqwala.
• Izizalisi zeMolybdenum (Mo) eziyi-6%.

Ukwenza le nto ikwaziyo ukuchwetheza ikwazisa imingeni ngenxa yokuba inamandla aphezulu. Iindlela ezilungileyo zokusebenzisa izixhobo ze-carbide ezibukhali nezigqunywe nge-camera kunye nolwelo lokusika olusemgangathweni ophezulu. Abasebenzi banokuphucula ukusebenza kwayo ngokusebenzisa isantya esiphezulu sokusika kunye namazinga okutya aphantsi.

Uhlalutyo lwexabiso kunye nokusebenza

Intsimbi ye-Super duplex inexabiso eliphezulu lokuqala lokuthenga xa ithelekiswa nentsimbi ye-2205 duplex okanye intsimbi engagqwaliyo eyi-316L. Oku kungenxa yomxholo wayo otyebileyo we-chromium, i-molybdenum, kunye ne-nitrogen. Nangona kunjalo, uthelekiso olulula lwexabiso luyakhohlisa.

Uvavanyo oluchanekileyo ngakumbi lusebenzisa uhlalutyo lweLife-Cycle Cost (LCC). Le ndlela iqwalasela iindleko zizonke kubomi bonke benkonzo yempahla.

Ifomula ye-LCC:Iindleko zokuqala + Iindleko zoLondolozo lobomi bonke + Iindleko zoTshintsho – Ixabiso lokusindisa

Kwii-asethi ezihlala ixesha elide (iminyaka eli-15 nangaphezulu) kwizicelo ezibalulekileyo, utyalo-mali oluphezulu oluvela kwangaphambili ludla ngokuba yinto efanelekileyo. Ukumelana nokugqwala okuphezulu kwe-alloy kunciphisa isidingo sokugcinwa okubizayo, ukulungiswa, kunye nokuvalwa kokusebenza. Kwiimeko apho ukusilela kwezinto kunokukhokelela kwilahleko ezinkulu, ukuthembeka kwe-alloy ye-premium kubonelela ngenzuzo ecacileyo kwezoqoqosho kulo lonke ixesha layo lobomi.

Isihloko esithi “umlwi we-ultimate corrosion fighter” se-2507 sifunyenwe kakuhle. I-chemistry yayo ekhethekileyo kunye ne-microstructure zinika amandla aphezulu kunye nokumelana nokugqwala okungenakuthelekiswa nanto. Ezi mpawu zenza ukuba ibe yimfuneko kwizicelo zoshishino ezifuna kakhulu. Nangona kunjalo, ukusebenza kwayo kuxhomekeke ekusetyenzisweni ngokuchanekileyo. Umzekelo, ukungaphumeleli kwe-heat exchanger kwenzeke xa i-alloy idityaniswe kwisixhobo esincinci, nto leyo ebangela ukuqhekeka. Eli tyala libonisa ukuba kwiindawo ezibalulekileyo apho ukungaphumeleli kungengokhetho, ukusebenza kwe-alloy kuqinisekisa ixabiso layo kunye nesidingo seendlela ezifanelekileyo zokwenza.

FAQ

I-2507 yahluke njani kwintsimbi ye-duplex engu-2205?

I-Super duplex 2507 inamanqanaba aphezulu e-chromium, i-molybdenum, kunye ne-nitrogen kune-2205 duplex steel. Olu lwakhiwo lutyebileyo lubonelela ngokumelana nokugqwala okuphezulu kunye namandla amakhulu oomatshini. Ixabiso layo eliphezulu le-PREN liqinisekisa ukusebenza kwayo okuphuculweyo kwiindawo ezinobundlongondlongo ze-chloride.

Yintoni eyenza i-2507 imelane nokugqwala kangaka?

Umxholo ophezulu we-chromium ye-alloy wenza umaleko okhuselayo ongasebenziyo. I-Molybdenum kunye ne-nitrogen ziyawuphucula lo maleko, zibonelela ngokumelana okugqwesileyo nokugqwala kwemingxuma kunye nokuqhekeka. Olu dibaniso lunamandla luyenza ibe yeyona ilungileyo kwiindawo ezityebileyo nge-chloride njengamanzi olwandle.

Ngaba i-2507 ingasetyenziswa kwizicelo zobushushu obuphezulu?

Iinjineli zichaza i-2507 ukuze isebenze ukuya kuthi ga kwi-300°C (572°F). Ukuvezwa ixesha elide ngaphezu kolu bushushu kunokutshintsha ulwakhiwo lwayo, kunciphisa ukuqina kunye nokumelana nokugqwala. Igcina iipropati ezilungileyo kumaqondo obushushu aphantsi ukuya kuthi ga kwi--50°C (-58°F), nto leyo eyenza ukuba isebenziseke kwiinkqubo ezininzi zoshishino.

Ingaba intsimbi ye-2507 super duplex ibiza kakhulu?

Ixabiso lokuqala lezinto zokwakha ze-2507 liphezulu kuneleiintsimbi eziqinileyo ezisemgangathweniNangona kunjalo, ukuqina kwayo okugqwesileyo kunciphisa iimfuno zokugcinwa kwexesha elide kunye nokutshintshwa. Oku kwenza ukuba ibe lukhetho olungabizi kakhulu kwiindlela ezibalulekileyo nezihlala ixesha elide apho ukuthembeka kubaluleke kakhulu.