Embonini yokuginqika yensimbi, amaroli asetshenziswa emigqeni egoqayo ebandayo neyokushisa ayizici ezibalulekile. Ngenxa yezinqubo ezihlukene kanye nezindawo zokusebenzisa kokubili, kukhona futhi umehluko omkhulu ekukhetheni okubalulekile kwamaroli. Sizohlola ngokuningiliziwe umehluko ekukhetheni izinto phakathi kwamaroli asetshenziswa emigqeni egoqayo ebandayo neshisayo.
Okokuqala, kunomehluko omkhulu ezingeni lokushisa lokusebenza phakathi kwamaroli emigqa egoqayo ebandayo kanye namarola ashisayo. Imigqa egoqayo eshisayo yenziwa emazingeni okushisa aphezulu futhi ngokuvamile idinga ukumelana nezinga lokushisa elifinyelela ku-1200 ℃. Ngakho-ke, izinto zokugoqa zomugqa oshisayo wokugoqa kufanele zibe nokusebenza okuhle kakhulu kokushisa okuphezulu nokumelana nokukhathala okushisayo. Izinto ezijwayelekile zifaka i-chromium cast iron ephezulu, insimbi enesivinini esikhulu, nensimbi ekwazi ukumelana nokushisa. Lezi zinto azigcini nje ngokugcina amandla nobulukhuni emazingeni okushisa aphezulu, kodwa futhi zimelana ne-oxidation nokugqwala okushisayo, ngaleyo ndlela zandisa impilo yesevisi yama-roll.
Ngokuphambene nalokho, imigqa egoqayo ebandayo yenziwa endaweni yokushisa yegumbi noma eduze nayo, ngakho-ke ama-rolls awadingi ukumelana namazinga okushisa aphezulu. Kodwa-ke, ngesikhathi senqubo yokugoqa ebandayo, ngenxa yezidingo eziphakeme zekhwalithi ephezulu yeshidi lensimbi, ukuqina kobuso nokugqoka ukumelana kwemiqulu kubaluleke kakhulu. Amaroli emigqa egoqayo abandayo ngokuvamile enziwa ngezinto ezifana nensimbi yamathuluzi engxubevange, insimbi yamathuluzi ekhabhoni, noma insimbi eyi-chrome plated. Lezi zinto zinobulukhuni obuphezulu nokumelana nokugqoka, okungaqinisekisa ukuthi ubuso bemiqulu abugqoki kalula ngesikhathi sokusetshenziswa kwamandla aphezulu isikhathi eside, ngaleyo ndlela kuqinisekiswe izinga eliphezulu lomkhiqizo.
Okwesibili, umthwalo nokucindezelwa kwemiqulu emigqeni ebandayo kanye nemigqa eshisayo nayo ihlukile. Ulayini ogoqayo oshisayo udinga ukucindezela amabhilidi ensimbi asezingeni eliphezulu ekucacisweni okuhlukahlukene kwamapuleti ensimbi, futhi amaroli adinga ukumelana nokucindezela okukhulu nomthelela, ngakho-ke okubalulekile kuyadingeka ukuze kube namandla aphezulu kanye nokuqina okuhle. Ulayini ogoqayo obandayo, ngenxa yokuthi wenziwa emazingeni okushisa aphansi, ikakhulukazi uthwala ama-shear aphezulu kanye namandla okungqubuzana emiqulu. Ngakho-ke, ukukhethwa kwezinto ezibonakalayo zama-roll rolling abandayo kugxile kakhulu ekuphikisweni kwabo kokugqoka nokumelana nokukhathala.
Ukwengeza, inqubo yokukhiqiza amaroli wemigqa egoqayo ebandayo ngokuvamile ibandakanya izinqubo eziningi zokwelashwa ezingaphezulu, njenge-chrome plating, ukucisha, njll., ukuze kuthuthukiswe ubulukhuni bawo bobuso kanye nokungagugi. Kodwa-ke, ngenxa yokusebenza ezindaweni ezinezinga lokushisa eliphezulu, lezi zindlela zokwelashwa ezingaphezulu azifanele amaroli wemigqa egoqayo eshisayo. Esikhundleni salokho, ukusebenza kwabo kuthuthukiswa ngokubunjwa kwe-alloy kanye nenqubo yokwelapha ukushisa kwento ngokwayo.
In summary, there are significant differences in the material selection of rolls for cold rolling and hot rolling lines, mainly reflected in the different requirements for working temperature, load, pressure, and surface quality. Hot rolling line roll materials need to have excellent high-temperature performance and thermal fatigue resistance, while cold rolling line roll materials emphasize high hardness and high wear resistance. Understanding and correctly selecting suitable roll materials is of great significance for ensuring the stability of the rolling process and product quality. As always, we sincerely appreciate your support and business. Please do not hesitate to contact ssophie@welongchina.com if you have any questions or concerns. We look forward to continuing our partnership with you.
Isikhathi sokuthumela: Jul-01-2024
