Xa abantu abaninzi besiva 'iindawo ezinganyangekiyo kwi-corrosion', bacinga ngoko nangoko i316 stainless steel baze bayibize ngokuba lusuku. Leyo yimpazamo yokuqala, kwaye ihlala ibiza kakhulu. Ukuchasa ayiloswitshi yokubini; sisikali sokutyibilika ngokuchasene neentshaba ezithile-i-chlorides, iiasidi, i-caustics, i-oxidation yobushushu obuphezulu. Ndibone iiprojekthi ezininzi kakhulu apho i-material i-corrosion-resistant ephepheni kodwa yasilela kwiinyanga ngenxa yokuba i-spec igxininise kusapho lwe-alloy, hayi imeko-bume yekhemikhali ebiya kuhlala kuyo. imalunga nokuqonda uhlaselo.
I-Illusion of Stainless
Masiyiqonde kakuhle le nto: zonke iintsimbi ezingenasici azenziwanga zilingana nomhlwa. 304 ilungile ude wazise neekloridi ezithambileyo, emva koko ufumane i-pitting. I-316 yongeza i-molybdenum, ikuthengele ixesha elithile, kodwa kwindawo eshushu, enetyuwa, emileyo? Isazoncama. Ndikhumbula umxhasi owagxininisa kwi-316 kwizinto zempompo zaselwandle, ephikisana nebakala lolwandle. Abazange balunanze olo yilo—imingxunya eqinileyo apho amanzi olwandle anokuhlala khona aze anikele ingqalelo. Kwiinyanga ezintandathu kamva, sasijonge kwi-corrosion yakudala. Inxalenye yayiyeyona nto ilungileyo, kodwa isicelo sasingalunganga. Ukulungiswa bekungeyiyo i-alloy engaqhelekanga, kodwa inguqu yoyilo lokuphelisa inkangeleko, idityaniswe ngokutshintshela kwi-duplex engenastainless efana ne-2205. Ngamanye amaxesha ubunjineli bubaluleke kakhulu kunetikiti lemathiriyeli.
Apha kulapho i-Foundry kunye ne-machining partnership iba yinto engenakuxoxisana. Awunako ukuvele u-odole urhatyazo olumelana nomhlwa. Inkqubo yokuthembeka ilawula ukusebenza kokugqibela. Ukuba unokufakwa, i-porosity, okanye i-microstructure engahambelaniyo ukusuka kumkhuba ongalunganga wokuphosa, udale iindawo zokuqalisa ezigqibeleleyo zomhlwa, nokuba yeyiphi ialloyi. Inkampani efumana oku, njengeQingdao Qiangsenyuan Technology (QSY), kufuneka ilawule inkqubo ukusuka ekunyibilikeni ukuya ekugqibeleni. Iminyaka yabo engamashumi amathathu kwiqokobhe kunye nokuphosa utyalo-mali kuthetha ukuba babonile ukuba ukufakwa kwe-slag encinci kunokuba yindawo yokusilela. Ngolu granular, ulawulo lwenqanaba lenkqubo olwahlula inxenye ehlala kwenye ebonakala ilungile ekufikeni.
Kwaye ukugqitywa komphezulu-kungahoywa ngolwaphulo-mthetho. Umphezulu orhabaxa, njengoko uphoswe phezulu unomgangatho ophezulu kakhulu kwaye unokubamba imidiya eyonakalisayo. Kuba yinyani iindawo ezinganyangekiyo kumhlwa, umendo uhlala uquka ukuchaneka kwe-post-casting ukuchaneka ukufikelela kwi-Ra ethile (i-avareji yobunzima) ixabiso. Umphezulu ogudileyo, ogqitywe ngokufanelekileyo kwindawo engenabala lukhuselo lwawo lokuqala nolona lungcono. Ukuhlanganiswa kwe-QSY yokuphosa kunye ne-in-house CNC machining ngundoqo apha; banokuqinisekisa ukuba umgangatho wokugqibela owenziwe ngoomatshini awungcolisi i-substrate ngentsimbi ehlonyelweyo evela kwizixhobo, ezinokudala iiseli zegalvanic. Ziinkcukacha ezingabonakaliyo ezibalulekileyo.
I-Alloy Gambit: I-Nickel, i-Cobalt, kunye nokwazi ixesha lokuchitha
Ukunyathela ngaphaya kwe-stainless, ungena kwindawo ye-alloys ekhethekileyo-esekelwe kwi-nickel njenge-Inconel 625, i-Hastelloy C-276, okanye i-cobalt-based njenge-Stellite. Apha kulapho iibhaluni zexabiso, kodwa ngokunjalo ukusebenza, ukuba kwaye kuphela ukuba kuyathetheleleka. Ukusabela kwamadolo kwindawo enzima kukuphosa i-Inconel kuyo. Bendinetyala lento. Kodwa i-Inconel 625 iyamangalisa kwi-oxidation kunye noluhlu olubanzi lwee-asidi, kodwa inokuba sengozini yoxinzelelo lwe-corrosion cracking kwiindawo ezithile ze-chloride ukuba ayiphathwa ngokuchanekileyo ubushushu. Awuthengi nje ingxubevange; uthenga yonke imbali thermal kunye noomatshini processing.
Sasinokusilela kwi-tube sheet exchanger heat eyenziwe kwi-alloy-based alloy nickel. Umhlwa wawungaqhelekanga, ubekwe kwindawo ephezulu. Emva kokuxilongwa kwe-metallurgical post-mortem, iye yabuyela emva kunyango lobushushu oluphakathi olungalawulwanga ngokugqibeleleyo, lushiya imida evuzayo yeenkozo. I-alloy yayichanekile, kodwa iresiphi yenkqubo ayiphumelelanga. Yiyo loo nto ndinika ingqwalasela kumyalelo womthengisi phezu kwalo lonke ikhonkco lexabiso. Ujongo olufutshane kwi-scope ye-QSY-ukusebenza ngezi ngxubevange zikhethekileyo ngapha kwe-casting kunye ne-machining-icebisa ukuba balawule yonke imbali ye-thermal. Awunako ukukhupha nje unyango lobushushu kwaye uthembele kokona kulungileyo xa usebenza nayo iindawo ezinganyangekiyo kumhlwa kwinkonzo ebalulekileyo.
Ngamanye amaxesha, impendulo iyamangalisa. Kwimeko-bume ye-caustic ephezulu, i-iron echazwe ngononophelo enomxholo ophezulu we-nickel (i-Ni-Resist) inokugqithisa iinketho ezibiza kakhulu kwaye ibe lula kakhulu kumatshini. Iqhinga kukuba namava ukwazi ukuba enye ikhona. Akusoloko malunga neyona nto iphezulu-teknoloji kwitshathi.
The Machining Compromise
Nantsi imfihlo emdaka: ukwenza oomatshini kunokonakalisa indawo ekwaziyo ukumelana nomhlwa. Ubushushu kunye noxinzelelo oluvela kwizixhobo zokusika, ngakumbi ngezi gummy, i-alloys esebenza nzima njenge-stainless okanye i-nickel-based based, inokutshintsha i-microstructure yomhlaba. Unokwenza umaleko obhityileyo, ocinezelekileyo, we-martensitic ochaphazeleka kakhulu kukumhlwa. Ndikhe ndabona iindawo ezicwebezelayo, ezenziwe kakuhle ngoomatshini beHastelloy zisilela kwimisonto ngenxa yokuba inkqubo yomatshini ivelise ubushushu obuninzi kwaye ayizange ilandelwe linyathelo elifanelekileyo lokuthomalalisa uxinzelelo okanye inyathelo lokuphinda lidlule.
Kulapho kuqaqamba khona ukwenziwa kwezinto ezidibeneyo. Ukuba iziko elifanayo lenza utyalo-mali olusasaza Indawo ye-QSY ikwaphethe i-CNC machining, banenkuthazo kunye nolwazi lokulandelelanisa imisebenzi ngokuchanekileyo. Bayayazi isibonelelo sesitokhwe esifunekayo ukususa ngokucocekileyo nakuphi na ukugalela ulusu okanye ukungcoliseka komphezulu. Bayaziqonda iiparamitha zokusika ze-microstructure yabo yokuphosa. Iyanciphisa umngcipheko wokwazisa ubuthathaka ngexesha ekufuneka libe linyathelo elongezelelweyo ixabiso.
Ukukhetha isixhobo lelinye ibala lokulwa. Ukusebenzisa ibakala elingalunganga le-carbide okanye ukupholisa okungachanekanga kunokukhokelela kwi-micro-welding, i-edge eyakhelweyo, kunye nomgangatho odibeneyo. Kuvakala kusisiseko, kodwa ngumgibe oqhelekileyo kwiimeko zevenkile yemisebenzi apho banokuqhuba i-aluminium ngenye imini kunye ne-Inconel elandelayo ngaphandle kokutshintsha ifilosofi yokuseta.
I-Real-World Grit: Ibali loMzimba weValve
Makhe ndichaze impumelelo ebambekayo, hayi kwincwadana enemifanekiso kodwa evela entsimini. Umxhasi wayefuna umzimba wevalvu omkhulu, ontsonkothileyo wokufaka igesi emuncu (i-H2S ikhona). Iimpawu zifuna ukuxhathisa okugqithisileyo kuxinzelelo lwe-sulfide. I-CF8M esemgangathweni (316 elinganayo) yayingekho kumbuzo. Sidlule kumdaniso wokukhetha izinto eziphathekayo: i-duplex stainless? super duplex? ekugqibeleni ufika kwi-nickel-based alloy casting.
Umceli mngeni yayibubukhulu obupheleleyo kunye nokwahluka kobukhulu becandelo. Ukufezekisa isandi, ukuphosa okulinganayo ngaphandle kweziphene ze-shrinkage kwi-alloy enjalo yi-Foundry art. Emva koko, ubuchwephesha: ukunyamezelana kwakunzima, kwaye nasiphi na isixhobo sokuthetha okanye ukuphambuka kuya kudala ukugqitywa komphezulu ombi, indawo yokuqaliswa kokuqhekeka okunokwenzeka. Iprojekthi iphumelele ngenxa yokuba i-Foundry (iqabane elineprofayili efana ne-QSY yokugxila kwexesha elide lokuphosa) lilinganisa ukuqiniswa, kusetyenziswa iindlela zokugalela ezilawulwayo, kwaye emva koko oomatshini babo bathatha indawo, besebenzisa ukuseta okuqinileyo kunye nokusikeka kokugcina ukugqiba amabhore. Inxalenye yayingeyonto nje; yayibubungqina benkqubo yolawulo. Lo mzimba wevalvu usekwinkonzo, eyona metric kuphela ebalwayo.
Iintsilelo zifundisa ngakumbi. Kwangoko, ndiye ndafumana ii-impellers zempompo kwi-17-4 PH engenasici, ndicinga ukuba ukuqina kwemvula kunokunika amandla amakhulu kunye nokuxhathisa umhlwa. Into endingazange ndiyiphendule kukuba unyango oluthile lobushushu ukufezekisa imeko ye-H900, ngelixa ukwandisa amandla, kunokunciphisa ukuxhathisa ukubola kwezinye imidiya. Safumana amandla, kodwa kolu daka luneasidi, sabona imingxuma ebesingayilindelanga. Kwafuneka sibuyele umva kwaye sichaze unyango olwahlukileyo lokuguga (i-H1150), sincama amandla athile obunzima bokusebenza okufunekayo. Isifundo: ingxubevange sisiqalo nje; imeko yayo sisivumelwano.
Inxaki yoMboneleli: Ngaphezulu kweXabiso leXabiso
Ke, xa ukhangela inyaniso iindawo ezinganyangekiyo kumhlwa, awuthengi nje imilo eyenziwe ngentsimbi ethile. Uthenga ubuchwephesha be-metallurgical, uqeqesho lwenkqubo, kwaye rhoqo, ukukwazi ukuxilonga. Ngaba umthengisi angaxoxa ngeetshathi zonyango lobushushu kwi-alloyi abayenzayo? Ngaba bayakwazi ukuyichaza inkqubo yabo yokunyamezela kwi-stainless? Ngaba bayayiqonda indlela iiparamitha zabo zomatshini ezichaphazela ngayo ingqibelelo yomhlaba?
Ubomi obude benkampani, njengeQSY's 30+ iminyaka ekujuleni nasekusebenzeni, ngummeleli onesidima wale nto. Kuthetha ukuba bakhe bajonga ezi ntsilelo kwaye bafunde. Ukukhankanywa kwabo ngokuba yincutshe kwiqokobhe kunye nokuphosa utyalo-mali kwizinto ezibandakanya ezo ngxubevange zikhethekileyo zindixelela ukuba zimiselwe izinto ezintsonkothileyo, ezinomgangatho ophezulu wokusebenza apho umhlwa uyeyona nto ixhalabisayo. Ukuphosa utyalo-mali, ngokukodwa, kukhulu ekufezekiseni iijiyometri ezintsonkothileyo, ezikufutshane-netha-zemilo kwezi ngxubevange zinzima kumatshini, yona ngokwayo iyindlela yokuphepha ukubola (i-machining encinci = ingozi encinci yomonakalo ongaphezulu).
Ekugqibeleni, i-spec sheet sisiqalo sencoko, hayi isiphelo. Inxalenye esindayo izalwa ngenxa yentsebenziswano phakathi koyilo lwesandi, ukhetho oluchanekileyo lwemathiriyeli kwimeko ethile, kunye nokuveliswa ngobuchule, okulawulwayo. Imoshakele, iyaphindaphindeka, kwaye igcwele urhwebo. Kodwa xa isebenza, inxalenye nje ... iyanyamalala kwinkonzo ethembekileyo, eyona ngongoma.
