Teknụzụ na-ekpo ọkụ kpụ ọkụ n’ọnụ nke Billet na-aga n’ihu (CC-HDR)

Na mmalite ogbo nke 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) Teknụzụ nrụpụta slab na-enweghị ntụpọ;

(2) Nkà na ụzụ nchọpụta ịntanetị maka ntụpọ slab nke nkedo;

(3) Iji okpomọkụ latent nke siri ike na-emepụta nkà na ụzụ nkedo nkedo okpomọkụ na-aga n’ihu;

(4) On-line ngwa ngwa slab obosara mgbanwe technology;

(5) Nkà na ụzụ njikwa okpomọkụ na-aga n’ihu na ikpo ọkụ;

(6) Kọmputa njikwa na nhazi usoro maka usoro.

Dabere na ọkwa okpomọkụ slab dị iche iche enwere ike nweta, usoro nkedo na-aga n’ihu na-aga n’ihu nwere ike kewaa:

(1) Obere okpomọkụ na-enyefe ọkụ na-ekpo ọkụ nke na-aga n’ihu na-emegharị ihe nkedo slab-na-ekpo ọkụ (site n’elu);

(2) Na-aga n’ihu nkedo billet na-ekpo ọkụ na-ekpo ọkụ na usoro ịgbagharị ọkụ ngwa ngwa (nke dị oke mma);

(3) Billet nkedo na-aga n’ihu (ọkụ n’akụkụ anọ) usoro ntụgharị ozugbo.

Nkedo na-aga n’ihu na-agbagharị ozugbo nke Nippon Steel’s Sakai Plant mepụtara na-eji nkwụghachi ọkụ ọkụ ọkụ ọkụ ọkụ eletrik (ETC) maka akụkụ anọ nke slab nke nwere okpomọkụ dị elu, nke enwere ike ịtụgharị ozugbo n’ime igwe akpọrepu ọkụ.

Osisi nchara buru ibu na obodo m (dị ka Baosteel, wdg) ndị na-emepụta efere dị elu enwetala nke ọma na mkpụgharị ọkụ na-ekpo ọkụ na-aga n’ihu.

Ihe nkedo na-aga n’ihu na-adị nso-net (nkedo na-aga n’ihu na-adị mkpa) bụ usoro nkedo ọhụrụ na-aga n’ihu nke emepụtara na 1990s. Kemgbe a mụrụ ya, e mebere ya ka ọ bụrụ ahịrị mmepụta na-aga n’ihu nke nwere igwe igwe na-akpụ akpụ na-aga n’ihu. Mgbe billet nkedo na-aga n’ihu na-esighi ike kpamkpam, enwere ike ịme mbelata ọkụ na ntanetị, na ọnọdụ okpomọkụ nke billet nkedo na-aga n’ihu nwere ike idowe n’elu akara mgbe ọ na-abanye n’igwe igwe na-atụgharị, ya bụ, ọ mebeghị mgbanwe site na austenite ( Y phase) ka ferrite (a phase). Nyefee n’ime mpempe akwụkwọ nchara ozugbo na steeti austenite nke mbụ. Ndị ọkà mmụta China achọpụtala na ígwè a na-emepụta n’ụzọ dị otú a adịghị emepụta austenite nke abụọ n’oge a na-atụgharị (a ^ 7) na nhazigharị kwekọrọ na nke oge a chụsasịrị agbasasị, ya mere efere dị mkpa nke na-emepụta ihe dị nso na-eme ka ọ dị nso na-aga n’ihu nkedo mmiri ozuzo siri ike. ghọọ nano-sized irighiri ihe, nke nwere mmetụta magburu onwe ya na àgwà ígwè. Obodo m ewuwo ahịrị mmepụta 12 maka nkedo dị mkpa na-aga n’ihu, na mmepụta kwa afọ na-enwe ọnọdụ dị oke mkpa n’ụwa.

Billet na-aga n’ihu nkedo bụ ihe nkedo na-aga n’ihu na nso nso-ụdị. Emere nyocha wee mepụta ya na mbụ, wee jiri ya mee ihe nke ọma na 1960s. N’ihi ihe ọmụma na ọkwa teknụzụ zuru oke n’oge ahụ, a na-ejikarị igwe ọkụ billet oyi eme ihe. obodo m siri ike kwalite billet na-aga n’ihu nkedo teknụzụ na 1980s, jikọtara ya na mba m ọnọdụ, jikọtara na obere converters (30t) na elu-ọsọ waya mkpanaka igwe na-etolite a general carbon ígwè ogologo ngwaahịa akara, na elu arụpụtaghị (a otutu). nke ndị na-emepụta ihe kwa afọ nke 1 nde tọn ma ọ bụ karịa)), na ntinye ego dị ala na asọmpi siri ike na ígwè maka ihe owuwu. Ihe a na-achọ nchara nchara na obodo m buru ibu, na ogologo ahịa ngwaahịa dịkwa oke mbara. Ya mere, nke a obere Ntụgharị-billet na-aga n’ihu nkedo-elu-ọsọ waya mkpanaka igwe mmepụta akara nwere a bukwanu oke nkezi nke obodo m mmepụta ígwè. Na mgbakwunye, nkedo billet na-aga n’ihu nwekwara uru ụfọdụ n’ime ngwaahịa igwe anaghị agba nchara dị ogologo (dị ka igwe nwere agba bọọlụ, igwe maka nrụpụta igwe). Iji meziwanye nrụpụta mmepụta ma chekwaa ume, nnyefe ọkụ na ịcha ọkụ nke slabs a na-etinyekwa nlebara anya karịa. Otú ọ dị, na-ejedebe na ọnọdụ nhazi mbụ, ọ dịghịzi adị mfe maka ikpo ọkụ ahụ ruo 700 RON, ọ dịkwa mkpa ka e mee ọtụtụ ihe nchekwa ọkụ. Ịkpọgharị billet na-ejikarị ọkụ ọkụ na-ere ọkụ. obodo m Zhenwu Electric Furnace Co., Ltd. tụpụtara ma chepụta usoro maka ịntanetị ngwa ngwa ikpo ọkụ nke slabs site na induction electromagnetic. Uru ya bụ ndị a:

(1) Oge ikpo ọkụ nke billet n’ime ọkụ nke etiti etiti dị mkpụmkpụ karịa oge a chọrọ ka ọ kpoo ọkụ na ọkụ ọkụ, nke na-abụghị nanị na-enyere aka belata nkwụsị ígwè, kamakwa ọ na-eme ka ọdịdị elu nke nkedo ahụ dịkwuo mma. slab n’oge usoro mpịakọta;

(2) Iji electromagnetic induction kpo oku, enweghi ngwaahịa combustion na mpaghara kpo oku, si otú a na-ezere oxidation na decarburization nke slab nke nkedo, ka e wee nweta billet dị ọcha site na ọkụ ọkụ a ngwa ngwa;

(3) Ebe ọ bụ na ọkụ ọkụ induction enweghị ngwaahịa combustion, ọ bụ enyi na gburugburu ebe obibi ma na-ebelata radieshon okpomọkụ nke ukwuu;

(4) Igwe ọkụ ọkụ induction abụghị naanị adaba, ngwa ngwa na zie ezi iji chịkwaa okpomọkụ na-akpaghị aka, mana ọ nwekwara ike ịchekwa ike;

(5) A na-eji ọkụ ọkụ induction na-ekpo ọkụ na-ekpo ọkụ na billet, na ọnụ ahịa nlekọta akụrụngwa dị ntakịrị karịa nke ọkụ ọkụ;

(6) Induction kpo oku Billlets nwere ike ikpo ọkụ nke ogologo oge karịa nke ọma, nke bara uru iji ghọta ntụgharị na-enweghị njedebe ma melite arụmọrụ ntụgharị.