Uma umuntu ebalula I-Incoloy 800, into yokuqala evame ukufika engqondweni ishidi layo ledatha: amandla amahle okushisa aphezulu, ukumelana nokugqwala okuhloniphekile, ingxube ye-nickel-iron-chromium eqinile. Kodwa esitolo se-Foundry kanye nemishini, lokho kuyisiqalo nje. Indaba yangempela isegebeni eliphakathi kwe-spec nomsindo wokukhipha, i-tint yokushisa, kanye nokuqhekeka okukhungathekisayo okwenzeka ngezikhathi ezithile. Ngibone amadizayini amaningi kakhulu eyithatha njengokuyingenela esikhundleni sika-304H noma 825, kulapho amakhanda aqala khona.
I-Casting Conundrum: Fluidity vs. Integrity
Iyasakaza I-Incoloy 800, ikakhulukazi ngomzila wokutshala imali, yilapho uhlukanisa khona ithiyori nokwenza. Ingxubevange inobubanzi obuncane bokuqandisa obuncane, obuhle ekwehliseni ukushrinkage porosity, kodwa i-viscosity yayo lapho ukuncibilika kungaba nzima. Awukutholi ukugeleza okulula kwamanye ama-carbon steels. Ezinqubweni zethu zokubunjwa kwamagobolondo e-Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), sifunde ukulungisa amazinga okushisa okushisa angaphambi kwesikhunta ngendlela enamandla kakhulu. Ukuthulula lokho okushiwo incwadi yokufunda kuvame ukuholela ekuvaleni okubandayo ezingxenyeni ezincane zezingxenye eziyinkimbinkimbi, njengalezo zokufakwa kwe-thermowell eziyinkimbinkimbi noma imibhobho yokushisa esivame ukuyikhiqiza.
Idizayini yesistimu yokugawula iba bucayi. Akukhona nje ngokuletha insimbi; imayelana nokulawula iphethini yokuqinisa ukuze kuphakelwe leso sigaba sokugcina ukuze kuqiniswe. Sake saba nenqwaba yezisekelo zamashubhu ezazilokhu zibonisa i-micro-porosity lapho kuhlangana khona i-flange-to-tube. I-spec yahlangatshezwana nayo, kodwa i-X-ray yakhuluma indaba ehlukile. Ukulungiswa kwakungelona ushintsho olukhulu lwamakhemikhali; ibiklama kabusha isakhiwo sokugijima nesikhuphukeli ukuze sidale ukuqina okuqondile okuya ngasesikhuphukeni. Yengeze isisindo ekubunjweni, okuyinto iklayenti ekuqaleni eyayingabaza, kodwa yaqeda ukwehluleka kwenkundla. Lokho ukuhwebelana.
Bese kuba khona i-oxide. Okuqukethwe kwe-chromium ne-aluminium kusho ukuthi i-oxide surface eqinile yakheka ngokushesha. Uma isikhunta sakho segobolondo singamile kahle noma sinokungena okuphansi, uzibeka engcupheni yokucupha leyo filimu ye-oxide ngaphakathi kokulingisa, udale indawo ekahle yokuqala yokuqhekeka ngaphansi kokuhamba ngebhayisikili okushisayo. Kuyisici esithule. Ungase uphumelele ukuhlolwa kwengcindezi ekamelweni lokushisa, kodwa izobonisa ubuso bayo ngemva kwezinyanga ezimbalwa isenkonzweni. Ukwenza kwethu manje kuhilela ukulawula okuqinile endaweni yamazolo egumbini le-stucco futhi ngezinye izikhathi ngisho nokulungisa kancane umkhuba we-deoxidizer ku-ladle, nakuba kufanele uqaphele ukuthi ungaphazamisi ezinye izakhiwo.
Imishini: Ukuthamba Okukhohlisayo
Ephepheni, I-Incoloy 800 akunzima kakhulu. Kepha noma yimuphi uchwepheshe wemishini othathe umsiki omusha kuwo uyazi ukuthi ulwa ngendlela ehlukile kune-stainless. Inomkhuba omubi wokusebenza kanzima, hhayi ngokufanayo. Ungathatha ukusika okuhle, bese ufika endaweni lapho okokusebenza kubonakala kuba kuqina khona, futhi inothi yakho yokufaka iguga ngaphambi kwesikhathi. Senza ama-post-casting CNC machining e-QSY, ama-valve aguqulayo, ama-milling flange. Ukhiye esiwutholile wukuvumelana: okuphakelayo okungaguquki, ukujula okungaguquki kokusikwa, akukho khaya.
Ukupholisa akukona nje okokupholisa lapha; okokuvikela lolu ungqimba oluqinisa umsebenzi ukuthi lwakhiwe. Kodwa kufanele usebenzise uhlobo olufanele. Sasuka kuwoyela oqondile saya kuma-emulsions okwenziwa asebenza kahle anolubricity engcono. Umgomo uwukukhipha i-chip ngokushesha futhi ugcine izinga lokushisa lezoni esikiwe lilawulwa. Kuyeke kushise kakhulu, futhi ukugwabuka kwengxubevange kubonakala kuphindaphindeka, kuhlafunwa ngisho namabanga e-carbide enzelwe ama-alloys amakhulu.
I-geometry yethuluzi ibaluleke kakhulu kunezinsimbi ezijwayelekile. Ireki ephozithivu, unqenqema olucijile, kanye ne-chipbreaker eyenzelwe izinto ezinezintambo azixoxiswana. Sifunde lokhu kabuhlungu kusenesikhathi, sikhiqiza amapende angaphezulu amahle afihle ama-micro-fractures ekudlidlizeni kwamathuluzi ngoba besisebenzisa ireki elibi kancane lamandla. Izingxenye ziphumelele ukuhlolwa kodwa zehlulekile ekuhlolweni kokuqhekeka kwengcindezi. Ukuhlaziywa kokwehluleka kukhomba kwesokudla endaweni esebenza ngomshini. Manje, sicacisa isu lendlela yamathuluzi kanye nethuluzi ngokwalo lokugxeka I-Incoloy 800 izingxenye.
I-Heat Treatment Tightrope
Wonke umuntu uyazi ukuthi isixazululo se-annealing sijwayelekile I-Incoloy 800 ukuhlakaza ama-carbides futhi ubuyisele leyo ductility. I-callout evamile ingu-1100°C ubuncane, ipholile ngokushesha. Kodwa igama elisebenzayo liyashesha. Esimweni sesitolo, kusho ukuthini ukushesha? Ukucisha amanzi? Ngezingxenye ezincane, mhlawumbe. Kepha kuma-cast-section-section casting noma amabhulokhi akhiwe ngomshini, ukucisha amanzi kuveza owakho ukucindezeleka okushisayo. Sibe nokuhlanekezelwa kwezingxenye, hhayi okuningi, kodwa okwanele ukuhlakaza ubuso bophawu obunemba ngomshini.
Siqhubekele kakhulu ekucimeni komoya okuphoqelekile kwezinye zezingxenye zethu. Ihamba kancane, yebo, okusho ukuthi udlala ngothando nemvula ye-carbide uma unganakile. Ngakho-ke kufanele ulawule isikhathi ukusuka esithandweni ukuya ekucimeni, futhi ukugeleza komoya kufanele kufane. Sifake isiteshi sokucisha umoya ophoqelelwe ngomsebenzi wethu wengxubevange yokushisa okuphezulu. Bekuwutshalomali, kodwa kwehlise izinga lethu le-scrap kusuka ekuhlanekezweni kokwelashwa kokushisa ngaphezu kuka-70% kulezi zinto. Kwesinye isikhathi ukulungiswa kwenqubo kubaluleke kakhulu kunokushintsha izinto.
Enye i-nuance ukukhululeka kokucindezeleka. Ezingxenyeni ezenza imishini enzima, ukukhululeka kwengcindezi kwamaphakathi cishe ku-900°C kungavimbela ukunyakaza ngesikhathi sokuqeda okokugcina. Kodwa kufanele ubhale lesi sinyathelo ngokucacile. Sake sathumela inqwaba yokulingisa okuphindwe kaningi okufakwe isixazululo, omshini onzima, odambisa ingcindezi, kwase kuba ngomshini. Umcwaningi mabhuku weklayenti ubone imijikelezo emibili yokuphatha ukushisa wase eyihlaba umkhosi njengokuphambuka. Bekufanele sinikeze ama-micrographs kanye namamephu wokuqina kuyo yonke ingxenye ukuze sifakazele ukuthi i-microstructure yokugcina yayilungile nokuthi umjikelezo omaphakathi awuzange uzilimaze izakhiwo. Kwakuyimpi yokubhala amaphepha phezu komkhuba ojwayelekile wesitolo.
Izingibe Zokushisela Nokwakha
Abakhiqizi bathanda ukushisela I-Incoloy 800 kuyona noma ku-carbon steel. Iyakwazi ukushisela, ngokuqinisekile, ngesigcwalisi esifanele (njenge-INCO-Weld 82/182). Kodwa ukulawulwa kokushisa kwangaphambi kokushisa kanye ne-interpass ngokuvamile kuvame ukucwebezela. Lena akuyona insimbi ethambile. Kuvumele kuphole kakhulu phakathi kokudlula, futhi uzibeka engcupheni yokuqhekeka ku-HAZ. Sihlinzeka ngezinto eziningi ezifakwa ukhonkolo ezishiselelwa kumasistimu amapayipi. Amaphekhi ethu edatha manje ahlanganisa ishidi lenqubo yokushisela enconyiwe, hhayi ngoba singochwepheshe bokushisela, kodwa ngenxa yokuthi siye sabona ukushaya ucingo lapho kwenziwa kabi.
Inkinga enkulu ukushisela okungafani. Uma ushisela I-Incoloy 800 kuya ku-carbon steel, ukufuduka kwekhabhoni kusuka ohlangothini lwensimbi kuya ku-alloy kungakha indawo ephukile. Kusevisi yezinga lokushisa eliphezulu, le ndawo ingahluleka. Sibe necala lapho ikhasimende lishisela umkhono wethu we-cast alloy thermocouple ngqo emkhunjini wensimbi ye-carbon. Yahlala unyaka wonke, yabe isiqhekeka ngokuzungeza ozwaneni olushiselayo. I-metallurgy ibonise ukuhlukaniswa kwekhabhoni okucacile. Isixazululo bekungekona ukushisela okungcono; bekusebenzisa ucezu loshintsho noma umklamo ohlukile ngokuphelele. Kwesinye isikhathi umkhawulo wezinto ezibonakalayo awukho ezintweni ngokwazo, kodwa endleleni ehlangana ngayo nomhlaba.
I-post-weld heat treatment (PWHT) ingelinye ikani lezikelemu. Uyakwenza? Amakhodi ngokuvamile ayidinga imikhumbi yokucindezela. Kodwa umjikelezo ogcwele we-PWHT ungadala kakhulu I-Incoloy 800 isisekelo sensimbi uma izinga lokushisa liphezulu kakhulu noma isikhathi eside kakhulu, sinciphisa amandla ayo okukhasa. Ukungqubuzana kwakudala phakathi kwezidingo zokwenziwa kanye nokusebenza kwempahla yesikhathi eside. Ukuma kwethu manje kufanele kucace kakhulu emibhalweni yethu: Lokhu kwaziswa sekuhoxisiwe. Noma iyiphi i-PWHT elandelayo kufanele icabangele umphumela wezakhiwo zensimbi eyisisekelo. Iphushela umthwalo wemfanelo wobunjiniyela emuva kumqambi nomklami, lapho kufanele kube khona.
I-Sourcing kanye ne-Equivalent Trap
Hhayi bonke I-Incoloy 800 idalwe yalingana. Ukwakheka okukodwa kunokubekezelelana, futhi lapho i-elementi iwela kuleyo bhendi ingathinta ukusebenza. Okuqukethwe kwe-aluminium ne-titanium, isibonelo, kubalulekile ekuzinzeni kwesikhathi eside ezingeni lokushisa eliphezulu. Sithola i-alloy stock yethu ngokucophelela, futhi ezinhlelweni ezibucayi, sicacisa ukuhlaziya ukushisa ukuthi kube phakathi kwebanga eliqinile, ikakhulukazi i-aluminium. Ibiza ngaphezulu, kodwa ithenga ukubikezela.
Imakethe igcwele ama-alloys alinganayo, ngokuvamile avela ezigayweni ezintsha. Bangase bahlangabezane ne-ASTM B409 spec ephepheni, kodwa izakhi zokulandelela nokuzijwayeza ukuncibilika kuyehluka. Sizame okufanayo okufanayo kubakaki besici sokushisisa esingabalulekile. Ifakwe kahle, yenziwe kahle ngomshini. Kodwa kusevisi cishe ku-800°C, ibonise ukukala kwe-oxidation okwengeziwe kunokuqukethwe kwethu okujwayelekile komthombo ngemva kwesikhathi esifanayo. Umlandu? Cishe ukulandelela izakhi ezifana ne-magnesium noma i-calcium ethinta ukunamathela kwe-oxide. Bekungekona ukwehluleka, kodwa bekungekuhle. Sinamathele kumnikezeli wethu owaziwayo wezingxenye lapho kubaluleke khona ukuzinza kwendawo.
Yilapho okubaluleke khona umlingani wesikhathi eside ochungechungeni lokuhlinzekwa kwempahla. Inkampani efana ne-QSY, enamashumi amathathu eminyaka ekubumbeni nasekukhiqizeni ama-alloys akhethekile, ayithengi nje insimbi; sithenga umlando wokusebenza okungaguquki ezigayweni zethu. Sakhe izinhlaka zenqubo yethu mayelana nokuziphatha kwamabanga athile. Ukushintshela kokulinganayo okungaziwa kusetha kabusha konke lokho okuhlangenwe nakho okufundiwe kuye kuziro, kwethula ubungozi. Kithina, ukwethembeka kwengxenye yokugcina yekhasimende kuwufanele iprimiyamu ekuqaleni. Kuncane mayelana nezindleko zempahla ngekhilo ngalinye futhi ngaphezulu mayelana nenani eliphelele lezindleko zokwehluleka emkhakheni.
Imicabango Yokugcina: Ukukhetha Okuthuthukisiwe
Ngakho, kunjalo I-Incoloy 800 impahla enhle? Nakanjani. Kuyihhashi lokusebenzela ngesizathu—kumashubhu enguquko, izishintshisi zokushisa, izingxenye zesithando somlilo. Kodwa akuyona impahla. Ingxubevange yobunjiniyela efuna inqubo yobunjiniyela. Inani lalo alikho nje ekubunjweni kwalo, kodwa endleleni zonke izinyathelo ukusuka ekuncibilikeni kuye ekugcineni zilawulwa ngokuqondisisa izici zayo.
Ubuchwepheshe bangempela, ngokubona kwami, busekwazini ukuthi isetshenziswa nini nokuthi icaciswa kanjani umsebenzi. Akuyona impendulo njalo. Ukuze uthole izindawo ezidlayo ezidlayo, ungase udinge u-825 noma 625. Ukuze uthole amandla amsulwa ezinga lokushisa eliphezulu, mhlawumbe 800H noma 801. Kodwa kuleyo ndawo emnandi yezinga lokushisa elimaphakathi, umoya we-carburizing/oxidizing, kanye nokwenziwa kahle, kunzima ukukuhlula. Iqhinga ukuhlonipha ubuntu bayo.
Ekugcineni, ukusebenza ngalezi zinto zokusebenza kuyingxoxo eqhubekayo phakathi kokucaciswa, inqubo, nesimo sesevisi somhlaba wangempela. Ayikho i-autopilot. Iqoqo ngalinye, ingxenye entsha yejiyomethri, iwukulinganiswa kabusha okuncane. Yilokho okukugcina kuthakazelisa, futhi ngokungagwegwesi, yini egcina ikhwalithi ezingxenyeni ezigcina zisezitshalweni ezisebenza amashumi eminyaka. Awukwazi uku-oda nje I-Incoloy 800 ngaphandle kwewebhusayithi; kufanele ulakhe, futhi wakhe ngalo, amehlo akho evulekile ukuze uthole imininingwane.
