I-Calcium Silicon 60 30 Alloy for Steelmaking Deoxidation and Inclusion Control 

I-calcium silicon 60 30 iletha ukukhishwa okunembile kwe-deoxidation nokulawulwa kokufakwa ekwenziweni kwensimbi yesimanje—ikakhulukazi ezinsimbi zesakhiwo sezinga eliphezulu, amabanga amapayipi, kanye neshidi lezimoto. Sinikeze le ngxube ezitshalweni eziyi-12 ze-EAF ne-BOF kulo lonke elase-China naseNingizimu-mpumalanga ye-Asia phakathi nezinyanga eziyi-18 ezedlule. Kuzo zonke izimo, abasebenzisi babike ukucaciswa kwe-slag okusheshayo, izinsalela ze-oxygen ephansi (0.0018–0.0024 wt%), kanye nokuthuthukiswa okulinganiselwe kumazinga okuphumelela okuhlolwa kwe-ultrasonic kuma-forging esigaba esiwugqinsi.

Kungani I-Calcium Silicon 60 30 Idlula I-Generic CaSi Alloys

Akuwona wonke ama-alloys e-calcium silicon aziphatha ngendlela efanayo ku-ladle metallurgy. Igama elithi “60 30” lisho ubuncane obuqinisekisiwe: 60% Si kanye no-30% Ca ngesisindo. Leso silinganiso sibalulekile-hhayi njengelebula lokumaketha, kodwa njengehange le-thermodynamic. Ku-60% Si, i-alloy ihlala izinzile ngesikhathi sokudla; ngaphansi kwama-58%, ijwayele ukuwohloka ezinhlelweni zocingo olunezintambo. Ku-30% Ca, i-dissolution kinetics ifanisa amaphrofayili ajwayelekile ashukumisa i-argon kumaledi angamathani angama-80–120. Sihlole amaqoqo e-CaSi ayisikhombisa okuhweba ngakunye: yilawo kuphela ahlangabezane nemininingwane yomibili athole ukutholwa okungaguquki kwe-Ca ngaphezu kwama-62%.

Ukulawula ukungcola kwehlukanisa ukusebenza nokuntekenteke. I-calcium yethu ye-silicon 60 30 iphethe i-Al ≤0.3%, S ≤0.03%, kanye ne-P ≤0.025%. Kubaluleke ngani lokho? I-Aluminium yakha i-Al encibilika kancane₂O₃-Ama-spinel e-CaO avala imibhobho ye-tundish. I-Sulfur yenza ubuthi be-calcium ekwenzeni i-sulfide. Ikhasimende elilodwa e-Guangdong lehlise izigameko zokuvala umlomo wombhobho ngo-74% ngemva kokusuka ku-28% Ca batch ngo-0.52% Al ukuya ebangeni lethu eliqinisekisiwe elingu-60 30.

Lokhu akulona ithiyori. Kukalwa ngedatha yesampula ye-tundish, amamephu wokufakwa asuka ekuhlaziyweni kwe-SEM-EDS, kanye nemibiko yesivuno sokugaya. I-calcium silicon 60 30 ayisusi umoya-mpilo nje kuphela—ilungisa kabusha i-inclusion morphology. I-Globular CaS kanye ne-calcium aluminates esikhundleni samaqoqo e-alumina abukhali. Lolo shintsho luthuthukisa ngokuqondile i-ductility ku--40 ° C nempilo yokukhathala ezingxenyeni ezibandayo.

Lapho I-CaSi Ejwayelekile Yehluleka—Futhi I-60 30 Ikulungisa Kanjani

Abanye bangase baphikise ngokuthi ishibhile i-25–28% ye-CaSi isebenza kahle ekukhipheni oksijini okuyisisekelo. Kodwa empeleni, lawo mabanga aphoqa ukuhwebelana. Okuqukethwe kwe-calcium ephansi kudinga amazinga aphezulu okwengezwa—ukukhulisa umthamo we-slag, ukukhulisa ukugqokwa kwe-refractory, kanye nezinga lokushisa le-ladle. Omunye umenzi wensimbi wengeze u-1.8 kg/ton ka-26% we-CaSi ukuze afinyelele umgomo ongu-[O]; ukushintshela ku-calcium silicon 60 30 ukusika umthamo ukuya ku-1.1 kg/ton ngenkathi kuthuthukisa ukululama kwe-Ca ngamaphesenti angu-19.

Izindleko zangempela akuyona i-alloy-iwumphumela ongezansi. I-CaSi enedosi engaphansi ishiya i-oxygen encibilikisiwe phezulu. I-CaSi enedosi engaphezulu idala izintambo ze-CaS ezeqile. Asikho isimo esidlula i-ASTM A1019 noma i-EN 10228-2 izimfuneko zokulinganisa ukufakwa kwepuleti lomkhumbi ocindezelayo. Ibanga lethu le-60 30 lifika ewindini elincane lapho umsebenzi we-Ca wanele khona ukuze ulungise okufakiwe *ngaphandle* kokugcwaliswa kwencibilika. Ukuhlolwa kwelebhu kubonisa imiphumela emihle ku-0.0025–0.0032% encibilikisiwe Ca—okutholakala kuphela ngokulawula okuqinile kokwakheka nokuqukethwe kwegesi ephansi (<15 cm³/100g).

Sihlola konke ukushisa ukuze sithole i-hydrogen, i-nitrogen, nomoya-mpilo sisebenzisa i-inert gas fusion (Leco ONH-836). Ayikho imikhumbi yenqwaba engenaso isitifiketi esigcwele sokuhlaziya—okuhlanganisa i-Ca yangempela, i-Si, i-Al, i-S, i-P, ne-Mg esele. Amakhasimende asitshela ukuthi lokhu kulandeleka kunciphisa isikhathi sawo sangaphakathi se-QA ngohhafu lapho efanelekela ukushisa okusha kwezicelo zezinga lenuzi.

Ukuhlanganisa Kulula Kunokuba Ucabanga

Ukondla i-calcium silicon 60 30 akudingi ukubuyiselwa emuva. Isebenza kumasistimu ocingo olunamakhodi ajwayelekile (Ø13–15 mm), izijovo ze-lance ezicwilisiwe, kanye nokusethwa komjovo wempushana—uma ukusabalalisa usayizi wezinhlayiyana kuhlala phakathi kuka-0.5–3.0 mm. Sikunikeza ngezinhlobo ezintathu ezibonakalayo: ama-granules agayiwe (ukwengeza i-ladle), izintambo ezinezintambo ezifakwe ngaphambili (ezine-Fe noma i-SiMn sheathing), kanye nezikhwama ezipakishwe ngokunemba ezingu-25 kg ezivaliwe ze-vacuum ezindaweni ezihlanzekile.

Amanothi okhiye wokufaka: gcina ngaphansi kuka-35°C futhi kude nomswakama. Ukuchayeka emoyeni oswakeme amahora angu->48 kwandisa i-oxidation yendawo—kubonakala njengothuli olumpunga kuma-granules. Leso singqimba se-oxide sehlisa ukuncibilika futhi sinciphisa ukulethwa okusebenzayo kwe-Ca. Sifaka amaphakethe we-desiccant nezinkomba zomswakama kukho konke ukuthunyelwa kwamanye amazwe. Ngemigqa yokusakaza eqhubekayo egijima > amathani angu-150/ihora, sincoma ukuphakela amasekhondi angu-30–60 ngaphambi kokunyakaziswa kwe-argon yokugcina—hhayi phakathi—ukwandisa isikhathi sokuhlala ngobuningi bensimbi.

Impendulo yomhlaba wangempela iqinisekisa ukwethembeka. Umhlinzeki we-auto we-Tier-1 e-Chongqing usebenzise ukushisa okulandelanayo okungu-47 esebenzisa i-calcium silicon yethu engu-60 30. Isibalo sokufakwa esimaphakathi nge-mm² sehle sisuka ku-8.2 saya ku-2.7 (ASTM E45 Method A). Isivuno sikhuphuke ngo-3.1%—hhayi ekunqatshweni okumbalwa, kodwa sisuka ekugoqweni kabusha okumbalwa ngenxa yokonakala kwendawo.

Ukukhetha Umhlinzeki Ofanele Kusho Ukubuza Imibuzo Elungile

Buza umphakeli wakho: Ingabe uyagaya futhi uhlanganise endlini—noma uvele upakishe kabusha impahla yomuntu wesithathu? Ungakwazi yini ukunikeza idatha ye-batch ethize ye-OES ne-Leco? Uyini umehluko ojwayelekile wokutholwa kwe-Ca kuwo wonke amathani angu-100 okushisa? I-Inner Mongolia Xinxin Silicon Industry Co., Ltd. iphendula ngoyebo kuzo zontathu. Sisebenzisa imigqa yokukhiqiza ye-CaSi ezinikele ngokulawula izinga lokushisa elivaliwe, ukuhlaziya ngesikhathi sangempela sokuncibilika, kanye nokusefa okuzenzakalelayo okulinganiselwe ku-±0.1 mm.

I-calcium silicon 60 30 yethu isekela amasu e-ferroalloy—hhayi nje okukhipha amanzi emzimbeni, kodwa kubunjiniyela bokufakwa okuhlosiwe. Imataniswa ngokubikezela namalebula alashwe nge-Mg ukuze kuthuthukiswe i-nodularity ku-ductile iron, kanye nesengezo se-Ti samabanga aqinile e-HSLA ahlanganisiwe. Vakashela xinxinsilicon.com ukuze udawunilode umbiko wethu wobuchwepheshe othi “CaSi 60 30 in Ladle Metallurgy: Dosage Charts, Inclusion Maps, and Failure Mode Analysis”—yakhiwe kusukela kumarekhodi okukhiqiza angu-217 kuzo zonke izinsimbi ezingu-14.

I-calcium silicon 60 30 ayiyona impahla. Kuyithuluzi elilinganisiwe. Yisebenzise kahle, futhi uzobona ama-slags ahlanzekile, amabhande ezakhiwo eziqinile, nezimanga ezimbalwa endaweni yokuqedela.