Yakananga Kupisa Kutenderedza Tekinoroji yeInoenderera mberi Casting Billet (CC-HDR)

Muchikamu chekutanga che 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) Non-defect slab kugadzira tekinoroji;

(2) Tekinoroji yekuona pamhepo yezvirema zvekukanda slab;

(3) Kushandisa yakadzikama kupisa kwekusimbisa kugadzira yakakwirira-tembiricha inoramba ichikanda slab tekinoroji;

(4) On-line nekukurumidza slab upamhi gadziriso tekinoroji;

(5) Kuenderera mberi kupisa uye kutenderedza tembiricha yekudzora tekinoroji;

(6) Komputa manejimendi uye kuronga hurongwa hwekuita.

Zvinoenderana neakasiyana mazinga etembiricha e slab anogona kuwanikwa, iyo inoenderera mberi yekukanda-inoenderera mberi rolling-yekubatanidza maitiro inogona kukamurwa kuita:

(1) Kudzika-kupisa kunopisa kuendesa kwekuenderera mberi kukanda slab-kudzoreredza rolling process (kubva kumusoro);

(2) Kuenderera mberi kukanda billet yakanyanya tembiricha inopisa kuendesa uye nekukurumidza reheat rolling process (pamusoro pezvakanakisa);

(3) Inoramba ichikanda billet (ina kona kupisa) yakananga rolling process.

Iyo inoenderera ichikanda yakananga rolling yakagadziridzwa neNippon Steel’s Sakai Plant inoshandisa electromagnetic induction kukurumidza kupisa (ETC) tembiricha muripo wemakona mana epamusoro-tembiricha cast slab, iyo inogona kukungurutswa yakananga mumakoiri anopisa akakungurutswa.

Zvigadzirwa zvesimbi zvakakura munyika yangu (zvakadai seBaosteel, nezvimwewo) izvo zvinogadzira mahwendefa emhando yepamusoro zvakabudirirawo zvakabudirira kutenderera kwakananga kunopisa kweanoramba achikanda slabs.

Near-net-shape inoenderera kukanda (thin slab inoramba ichikanda) inzira nyowani inoenderera yekukandira yakagadzirwa muma1990s. Kubva pakuzvarwa kwayo, yakagadzirwa senzira inoenderera yekugadzira ine chigayo chinoramba chichitenderera. Kana iyo inoramba ichikanda billet isina kusimba zvachose, kuderedzwa kwechiedza kunogona kuitwa online, uye tembiricha yeinoramba ichikanda billet inogona kuchengetwa pamusoro pemutsara painopinda muchigayo chinoputika, ndiko kuti, haina kuita shanduko kubva kuaustenite ( Y phase) to ferrite (a phase). Yakakungurutswa musimbi pepa yakananga mune iyo yekutanga austenite chikamu. Nyanzvi dzeChinese dzakaona kuti simbi inogadzirwa nenzira iyi haiburitse yechipiri austenite panguva yekukunguruka (a ^ 7) uye kupatsanurwa kunoenderana kwechikamu chemvura yakapararira, saka ndiro yakatetepa inogadzirwa nepedyo-neti-chimiro inoenderera ichikandira Precipitation inoomesa mvura inogona. ive nano-saizi zvimedu, zvine mhedzisiro yakanaka pamhando yesimbi. nyika yangu yakavaka mitsara gumi nembiri yekugadzira yeatete slab inoenderera mberi kukanda, uye kubuda kwegore kunotora chinzvimbo chakakosha kwazvo munyika.

Billet kuenderera mberi kukanda kuri padhuze-net-shape inoenderera mberi ichikanda. Yakatsvakurudzwa uye yakagadziridzwa kare, uye yakashandiswa zvakabudirira muma1960. Nekuda kweruzivo uye yakazara tekinoroji level panguva iyoyo, inotonhora billet reheating rolling yainyanya kushandiswa. nyika yangu yakasimudzira zvine simba tekinoroji inoenderera mberi yekukanda tekinoroji muma1980s, yakasanganiswa nemamiriro emunyika yangu, yakasanganiswa neshanduko diki (30t) uye yakakwirira-yekumhanya waya tsvimbo yekugadzira iyo yakajairika kabhoni simbi yakareba chigadzirwa mutsara, ine kubereka kwakanyanya (yakawanda. yeavo vane goho regore remamiriyoni e1 matani kana kupfuura) ), ine mari shoma uye kukwikwidza kwakasimba musimbi yekuvaka. Kudiwa kwesimbi yekuvaka munyika yangu yakakura, uye musika wakareba wechigadzirwa zvakare wakapamhama. Naizvozvo, iyi diki inoshandura-billet inoenderera mberi ichikanda-yakakwira-kumhanya waya tsvimbo yekugadzira mutsara inotora chikamu chakakura chekugadzirwa kwesimbi kwenyika yangu. Pamusoro pezvo, billet inoramba ichikanda zvakare ine zvimwe zvakanakira mune yakaderera-alloy simbi yekugadzira simbi yakareba zvigadzirwa (senge bhora rinotakura simbi, simbi yekugadzira michina). Kuti uvandudze kugona kwekugadzira uye kuchengetedza simba, kutakura kunopisa uye kupisa kuchaja kweakakanda slabs kwakabhadharwa zvakanyanya uye zvakanyanya kutariswa. Nekudaro, zvakaganhurirwa kumamiriro ekutanga ekugadzira, hazvisisiri nyore kuti tembiricha ye slab isvike 700 RON, uye matanho mazhinji ekuchengetedza kupisa anoda kutorwa. Kudzoreredzwa kwebillet kunonyanya kushandisa mafuta-anopisa kupisa moto. nyika yangu Zhenwu Electric Furnace Co., Ltd. yakakurudzira uye yakagadzira nzira ye-on-line nekukurumidza kupisa kweakakanda slabs nemagetsi induction. Zvayakanakira ndezvizvi:

(1) Nguva yekudziya yebillet muchoto chepakati penguva ipfupi pane iyo nguva inodiwa kuti ichidziswe muchoto chemoto, iyo isingangobatsiri kuderedza kurasikirwa kwesimbi, asi zvakare inovandudza kunaka kwepamusoro kwekasi. slab panguva yekukunguruka;

(2) Uchishandisa electromagnetic induction heat, hapana zvigadzirwa zvinopisa munzvimbo yekudziya, nekudaro zvinobudirira kudzivirira iyo oxidation uye decarburization yeakakanda slab, kuitira kuti billet yakachena iwanikwe kuburikidza nekupisa uku nekukurumidza;

(3) Sezvo induction yekudziisa choto isina zvigadzirwa zvekupisa, inoshamwaridzana nenharaunda uye inoderedza zvakanyanya kupisa mwaranzi;

(4) Iyo induction yekupisa choto haingori nyore, nekukurumidza uye kwakaringana kudzora tembiricha, asi zvakare inogona kuchengetedza simba;

(5) The induction heat furnace inoshandiswa kupisa billet, uye mari yekugadzirisa midziyo iduku zvikuru kupfuura iyo yevira remoto;

(6) Induction yekudziya mabheti anogona kupisa mabheti akareba-akareba zviri nyore, izvo zvinobatsira kuona semi-isingaperi kutenderedza uye kunatsiridza kukwenenzvera.