Tignoolajiyada Tooska ah ee Dulitaanka Kulul ee Billet Joogta ah ee Qaadista (CC-HDR)

Marxaladda hore ee continuous casting process, the section of the cast slab is small, the temperature drops quickly, and the quality of the cast slab is poor. Therefore, surface finishing is required before rolling, so cold billet reheating is used. This wastes a lot of energy. In the 1980s, after long-term research, Nippon Steel Corporation successfully developed wide-section continuous casting slab hot delivery and hot charging and even hot direct rolling processes, which greatly improved the compactness of continuous casting and continuous rolling. Significantly save energy. In order to realize the hot delivery and direct rolling of continuous casting billets, the following complete sets of technologies are required as a guarantee, namely:

(1) Farsamada wax-soo-saarka dhoobada aan cilad lahayn;

(2) Tignoolajiyada ogaanshaha on-line ee cilado dhoobada ah;

(3) Isticmaalka kulaylka daahsoon ee adkeynta si loo soo saaro heerkul sare oo tignoolajiyada dhejinta joogtada ah;

(4) Tiknoolajiyada hagaajinta ballaca balaca ee khadka tooska ah;

(5) Kulaylinta joogtada ah iyo tignoolajiyada xakamaynta heerkulka;

(6) Maaraynta kombuyuutarka iyo nidaamka jadwalka habsocodka.

Marka loo eego heerarka heerkulka sariiraha ee kala duwan ee la heli karo, habka is dhexgalka-rogid-joogta ah ee shubista-joogta ah waxaa loo qaybin karaa:

(1) Heerkulka-hooseeya ee gaarsiinta kuleyliyaha joogtada ah ee geeddi-socodka rogid-kuleelka (korka);

(2) shubista joogtada ah ee xabaasha xadhkaha goosashada heerkul sarreeya iyo habka dib u kululaynta degdega ah (ka sarreeya);

(3) Billet tuuris joogto ah (kuleyl afar gees ah) habka duubista tooska ah.

Duubista tooska ah ee tooska ah ee ay samaysay Nippon Steel’s Sakai Plant waxay isticmaashaa kuleyliyaha degdega ah ee kuleyliyaha (ETC) ee kuleyliyaha afarta gees ee kabka heerkulka sare, kaasoo si toos ah loogu rogi karo gariiradaha duuban ee kulul.

Dhirta waaweyn ee birta ah ee dalkayga (sida Baosteel, iwm.) ee soo saara taariko tayo sare leh ayaa sidoo kale si guul leh u gaadhay wareegyo kulul oo toos ah oo ah dhejisyo shub ah oo joogto ah.

Shabakadda dhow-qaabka shubista joogtada ah (dhagax khafiif ah oo dhejis joogto ah) waa hab cusub oo shubid joogto ah oo la sameeyay 1990-meeyadii. Tan iyo dhalashadiisa, waxaa loo qaabeeyey sidii khad wax soo saar joogto ah oo leh warshad duuban oo joogto ah. Marka biilka tuurista joogtada ah aan si buuxda loo adkeyn, dhimista iftiinka ayaa lagu samayn karaa online, iyo heerkulka qashinka shubka joogtada ah waxaa lagu hayn karaa meel ka sarreysa xariiqda marka ay gasho mashiinka duubista, taas oo ah, ma aysan dhicin isbeddelka austenite ( wejiga Y) si aad u ferrite (weji). Si toos ah loogu duubay xaashi bir ah oo ku taal xaaladda wajiga austenite aasaasiga ah. Culimada Shiinaha ayaa ogaaday in birta lagu soo saaro habkan aysan soo saarin austenite sare inta lagu jiro duubista (a ^ 7) iyo dib-u-diridda u dhiganta ee wejiga roobka ee kala firdhiyey, sidaa daraadeed saxanka khafiifka ah ee uu soo saaro qaab-sharafeedka joogtada ah ee shubista Roobabka adkeyn kara noqdaan qaybo nano-xajmi ah, kuwaas oo saameyn fiican ku leh tayada birta. Dalkaygu wuxuu dhisay 12 khadadka wax-soo-saarka si loo shubo dhuuban oo joogto ah, wax-soo-saarka sannadlaha ahna wuxuu hayaa meel aad muhiim u ah adduunka.

Billet shubista joogtada ah ayaa asal ahaan u dhow qaab-shabakadda wax shubid joogto ah. Waxa la baadhay oo hore loo soo saaray, waxaana si guul leh loo isticmaalay 1960-kii. Aqoonta iyo heerka farsameed ee dhammaystiran awgeed wakhtigaas, kuleyliyaha billet qabow ayaa inta badan la isticmaalayey. Dalkaygu wuxuu si xoog leh u dallacsiiyay tignoolajiyada shubista joogtada ah ee billet sannadihii 1980-meeyadii, oo ay weheliso xaaladaha qaran ee dalkayga, oo ay weheliso beddelayaasha yaryar (30t) iyo mishiinnada usha xawaaraha sare leh si ay u sameeyaan khadka wax soo saarka guud ee birta kaarboonka oo dheer, leh wax soo saar sare (wax badan) kuwa leh wax-soo-saarka sannadlaha ah ee 1 milyan tan ama ka badan)), oo leh maalgashi hooseeya iyo tartan xooggan oo birta dhismaha ah. Baahida loo qabo birta dhismaha ee dalkayga waa mid weyn, suuqa wax soo saarka ee dheer ayaa sidoo kale aad u ballaaran. Sidaa darteed, beddelka-billet-yar-yar ee joogtada ah ee shubka-xawaaraha sare leh ee xadhkaha wax-soo-saarka birta wax-soo-saarka ayaa qayb weyn ka ah wax-soo-saarka birta ee waddankayga. Intaa waxaa dheer, tuurista joogtada ah ee billet waxay sidoo kale leedahay faa’iidooyin gaar ah oo ku jira alaabada dhaadheer ee qaab dhismeedka birta alloy hoose (sida birta sida kubbadda, birta wax soo saarka mishiinka). Si loo hagaajiyo waxtarka wax-soo-saarka loona badbaadiyo tamarta, gaarsiinta kulul iyo ku dallacaadda kulul ee xargaha kabka ayaa sidoo kale la bixiyay fiiro iyo feejignaan dheeraad ah. Si kastaba ha ahaatee, ku xaddidan shuruudaha naqshadeynta asalka ah, ma fududa heerkulka sariiraha si uu u gaaro 700 RON, iyo tallaabooyin badan oo ilaalinta kulaylka ayaa loo baahan yahay in la qaado. Dib u kululaynta billet-ka waxay badi isticmaashaa foornada kuleyliyaha ee shidaalka guba. dalkayga Zhenwu Electric Furnace Co., Ltd. waxa uu soo jeediyay oo nashqadeeyay hab on-line ah kulaylinta degdega ah ee dhagaxyada kabka by induction electromagnetic. Faa’iidooyinka ay leedahay waa sida soo socota:

(1) Waqtiga kululaynta billet ee foornada soo noqnoqda ee dhexdhexaadka ah ayaa aad uga gaaban wakhtiga loo baahan yahay in lagu kululeeyo foornada ololka, taas oo aan ka caawinaynin oo kaliya in la yareeyo khasaaraha birta, laakiin sidoo kale waxay hagaajinaysaa tayada dusha sare ee kabka. sariirta inta lagu jiro habka duubista;

(2) Isticmaalka kuleyliyaha induction electromagnetic, ma jiraan wax soo saarka gubashada ee aagga kuleyliyaha, si wax ku ool ah looga fogaado oksaydhka iyo decarburization ee kabka, si billet nadiif ah waxaa laga heli karaa iyada oo kuleylintan degdega ah;

(3) Maaddaama foornada kuleyliyaha induction aysan lahayn alaab gubasho, waa deegaan saaxiibtinimo waxayna aad u yareysaa shucaaca kulaylka;

(4) Foornada kuleylka induction ma aha oo kaliya mid ku habboon, degdeg ah oo sax ah si si toos ah loo xakameeyo heerkulka, laakiin sidoo kale waxay badbaadin kartaa tamarta;

(5) Foornada kuleyliyaha induction waxaa loo isticmaalaa in lagu kululeeyo billet, iyo kharashka dayactirka qalabku aad ayuu uga yar yahay kan foornada ololka;