Itekhnoloji yokuRola ngokuNgqongileyo yeBillet eQhubelekayo (CC-HDR)

Kwinqanaba lokuqala le 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) Itekhnoloji yokwenziwa kwe-slab engenasiphako;

(2) Itekhnoloji yokukhangela kwi-intanethi kwiziphene ze-slab;

(3) Ukusebenzisa ubushushu obufihlakeleyo bokuqina ukuvelisa itekhnoloji ye-slab ephezulu yobushushu obuqhubekayo;

(4) Itekhnoloji yokulungelelaniswa kobubanzi be-slab kwi-intanethi;

(5) Ukufudumala okuqhubekayo kunye neteknoloji yokulawula ubushushu;

(6) Ulawulo lwekhompyutha kunye nenkqubo yokucwangcisa inkqubo.

Ngokwamanqanaba ahlukeneyo obushushu be-slab anokufumaneka, inkqubo eqhubekayo yokudibanisa-i-rolling-integration inokwahlulwa ibe:

(1) Unikezelo olushushu olusezantsi lwenkqubo eqhubekayo yokugalela i-slab-reheating rolling (ukusuka phezulu);

(2) Ukuphosa i-billet ngokuqhubekayo ukuhanjiswa kweqondo lobushushu obuphezulu kunye nenkqubo yokuqengqeleka ngokukhawuleza (ngaphezulu kweyona ndlela ibalaseleyo);

(3) I-billet eqhubekayo yokuphosa (ukufudumeza kweekona ezine) inkqubo yokujikeleza ngokuthe ngqo.

Ukuqengqeleka okuthe gqolo okuqengqelekayo okuphuhliswe yi-Nippon Steel’s Sakai Plant kusebenzisa imbuyekezo yobushushu be-electromagnetic induction quick heat (ETC) kwiikona ezine ze-slab ye-slab yobushushu obuphezulu, enokuqengqeleka ngokuthe ngqo kwiikhoyili eziqengqelekayo.

Izityalo zetsimbi ezinkulu kwilizwe lam (ezifana ne-Baosteel, njl.) ezivelisa iipleyiti ezikumgangatho ophezulu nazo zifezekise ngempumelelo ukuqengqeleka okushushu okuthe ngqo kwee-slabs zokuphosa eziqhubekayo.

I-Near-net-shape continuous casting (i-slab esincinci eqhubekayo) yinkqubo entsha eqhubekayo yokusatywa eyaphuhliswa ngo-1990s. Ukususela ekuzalweni kwayo, yenzelwe umgca wemveliso oqhubekayo kunye ne-rolling mill eqhubekayo. Xa i-billet eqhubekayo yokuphosa ingaqini ngokupheleleyo, ukunciphisa ukukhanya kunokwenziwa kwi-intanethi, kwaye ubushushu be-billet eqhubekayo yokuphosa bunokugcinwa ngaphezu komgca xa ingena kwi-rolling mill, oko kukuthi, ayizange iguquke kwi-austenite. Isigaba sika-Y) ukuya kwi-ferrite (isigaba). Igqitywe kwiphepha lensimbi ngokuthe ngqo kwimeko yesigaba sokuqala se-austenite. Abaphengululi baseTshayina baye bafumanisa ukuba intsimbi eveliswe ngolu hlobo ayivelisi i-austenite yesibini ngexesha lokuqengqeleka (a ^7) kunye nokupheliswa okuhambelanayo kwenqanaba lemvula esasazekileyo, ngoko ke ipleyiti ebhityileyo eveliswe ngokurhabula ngokuqhubekayo kwimilo ekufutshane ne-net-shape. babe ngamasuntswana e-nano-size, anefuthe elihle kakhulu kumgangatho wentsimbi. ilizwe lam lakhe imigca yemveliso ye-12 ye-slab ebhityileyo eqhubekayo, kwaye imveliso yonyaka ithatha indawo ebaluleke kakhulu kwihlabathi.

I-billet eqhubelekayo yokusasa ngokwesiseko ikufutshane ne-net-shape eqhubekayo. Yaphandwa kwaye yaphuhliswa ngaphambili, kwaye yasetyenziswa ngempumelelo ngeminyaka yoo-1960. Ngenxa yolwazi kunye nenqanaba lobugcisa elibanzi ngelo xesha, i-billet ebandayo yokuvuselela i-rolling yayisetyenziswa kakhulu. ilizwe lam likhuthaze ngamandla itekhnoloji yokuphosa i-billet eqhubekayo kwiminyaka yoo-1980, idityaniswe neemeko zelizwe lam, idityaniswe nabaguquli abancinci (30t) kunye nesantya esiphezulu socingo lokusila ukwenza umgca wemveliso wekhabhoni omde, kunye nemveliso ephezulu (ininzi kakhulu). kwabo banemveliso yonyaka ye-1 yezigidi zeetoni okanye ngaphezulu) ), kunye notyalo-mali oluphantsi kunye nokukhuphisana okunamandla kwintsimbi yokwakha. Imfuno yentsimbi yokwakha kwilizwe lam inkulu, kwaye imarike yemveliso ende nayo ibanzi kakhulu. Ke ngoko, esi siguquli-billet sincinci esiqhubekayo sokuphosa-isantya esiphezulu somgca wokuvelisa i-wire rod ithatha umlinganiselo omkhulu wemveliso yentsimbi yelizwe lam. Ukongeza, i-billet eqhubekayo yokuphosa nayo ineenzuzo ezithile kwi-low-alloy metal structural metal products long (ezifana nentsimbi ephethe ibhola, intsimbi yokuvelisa oomatshini). Ukuze kuphuculwe ukusebenza kakuhle kwemveliso kunye nokugcina amandla, ukuhanjiswa okushushu kunye nokutshaja okushushu kwee-slabs eziphosiweyo kuye kwahlawulwa ngakumbi nangakumbi. Nangona kunjalo, ukukhawulelwa kwiimeko zokuqala zokuyila, akusekho lula ukuba ukushisa kwe-slab ukufikelela kwi-700 RON, kwaye amanyathelo amaninzi okugcina ukushisa kufuneka athathwe. Ukufudumeza kwakhona kwebillet ikakhulu kusebenzisa i-fuel-burning furnace. ilizwe lam iZhenwu Electric Furnace Co., Ltd. icetywayo kwaye yayila indlela yokufudumeza okukhawulezileyo kwi-intanethi kwi-slabs ye-cast nge-electromagnetic induction. Iinzuzo zayo zezi zilandelayo:

(1) Ixesha lokufudumeza i-billet kwisithando somlilo esiphakathi lifutshane kakhulu kunexesha elifunekayo ukuze lifudunyezwe kwisithando somlilo, esingancedi nje ukunciphisa ilahleko yentsimbi, kodwa siphucula umgangatho womphezulu wesanti. i-slab ngexesha lenkqubo yokuqengqeleka;

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(3) Ekubeni i-furnace yokufudumeza i-induction ayinamveliso yokutsha, ihambelana nokusingqongileyo kwaye iyanciphisa kakhulu ukushisa kwemitha;

(4) I-furnace yokufudumeza i-induction ayilula nje kuphela, ngokukhawuleza kwaye ichanekile ukulawula ngokuzenzekelayo ubushushu, kodwa inokugcina amandla;

(5) Isithando somlilo sokufudumeza sisetyenziselwa ukufudumeza i-billet, kwaye iindleko zokugcinwa kwezixhobo zincinci kakhulu kunezo ziko lomlilo;

(6) Iibhilithi zokufudumeza zokufudumeza zinokufudumeza iibhilithi ezinde kakhulu ngokulula, okuluncedo ukuqonda ukuqengqeleka okungapheliyo kunye nokuphucula ukusebenza kakuhle.