Izinga lokushisa elihlanganisiwe linomthelela emugqeni

Ngemva kokuqeda ukugoqa umugqa, ukupholisa amanzi ngaphakathi kwesendlalelo ukuze ushintshe izinga lokushisa lokugoqaα icindezelwe kakhulu.Ngaphansi kwe-eutectoid ferrite nucleation kanye nokukhula kwezinga lokushisa elithandelayo, ngemva kokuphothulwa kwezimo zokupholisa ezihamba kancane kakhulu kungabhekwa njengokufana nenqubo yokuguqulwa kwe-isothermal, ngakho-ke, okuthinta izinga lokushisa lokugoqa ku-microstructure kanye nezakhiwo zensimbi eziqondwa njengomthelela wokushintsha kwezinga lokushisa. .Ngakho-ke umthelela wokushisa okukhonkolo ku-microstructure nasezindaweni zensimbi ubaluleke kakhulu.Lapho izinga lokushisa eligoqiwe liphezulu, iyunifomu yezinhlamvu ze-ferrite, ephansi kakhulu ngenxa yoshintsho lwezinga lokupholisa okukhulu.α, amaphuzu amancane we-nucleation, ikakhulukazi emingceleni yokusanhlamvu yokuqalaγ okusanhlamvu, isivinini sokukhula kune-ferrite esheshayo efanele.Uma izinga lokushisa lokugoqa liphansi,α kwenyusa inani le-nucleation, isivinini sokukhula sibambezela i-ferrite, usayizi wokusanhlamvu we-ferrite uba mncane, kodwa uvame ukusabalalisa i-pearlite enhle.Ngokuncipha kwezinga lokushisa okugoqiwe kokusanhlamvu kwe-ferrite, inani le-acicular ferrite lakhula kancane kancane, landa okuqukethwe kwe-pearlite, isikhala se-pearlite lamellar sincishiswa kancane kancane.Ngakho-ke, ngezinga lokushisa eliphansi le-coiling, inkomba yamandla izokhula, kuyilapho inkomba yepulasitiki yehla kancane, okuyizinto ze-carbon ne-ferritic alloy ngenxaγ-α ukuguquka kwesigaba emazingeni okushisa aphansi atholwe lapho okuqukethwe kwezimo eziphuthumayo eziphezulu.Uma ukuphela kwezinga lokushisa elibandayo liphansi kakhulu, isilinganiso sesivuno sithuthukisa ukwakheka sibe yingozi, ngoba isigaba sesibili sesizukulwane esiningi kakhulu, ikakhulukazi inkomba ye-coarse bainite steel plasticity index of disadvantage.

Umthelela wokulawula izinga lokushisa ekhoyili ku-microstructure

Imishini yemishini ye-Metallurgical, izinga lokushisa le-coiling kanye nokushisa kokuqeda ukugoqa, njengomthelela we-microstructure enkulu yensimbi, ingenye yezinqumo zokucubungula insimbi ephelile, izakhiwo zemishini zemingcele yenqubo ebalulekile.Ukulawulwa kwezinga lokushisa okugoqiwe kuwukukhiqizwa kokupholisa okulawulwayo kwe-hot-rolled strip iron rolling, kanye nokupholisa okulawulwayo ngemva kokugingqa izici eziyinhloko ezithinta ikhwalithi yemikhiqizo ukuqala kokupholisa (izinga lokushisa lokuqala elipholisa ngokuyisisekelo liyizinga lokushisa eliqedayo) kanye nezinga lokushisa lokugcina, ukupholisa. isivinini kanye nokufana kokupholisa.Izinga lokushisa lokugoqa kufanele libe ngaphansi kwama-670℃, ngokuvamile 600 ~ 650℃.Ngaphakathi kwala mazinga okushisa, i-metallurgical steel microstructure yemishini yensimbi isiqediwe, inganciphisa ukupholisa kanye nokupholisa kancane ukuze kuncishiswe ukucindezelwa kwangaphakathi komugqa nakho kuyazuzisa.Izinga lokushisa lokugoqa liphezulu kakhulu, lizoholela ekukhanyeni kabusha kanye nokupholisa kancane ngemva kokuba ukugoqa kukhiqize ukunqwabelana kwezicubu kanye nama-carbides okusanhlamvu okumahhadla, okuholela ekuwohlokeni kwezakhiwo zemishini kanye nokukhiqizwa kwesikhumba sensimbi eqinile, ngakho ukucosha kube nzima.Uma izinga lokushisa le-coiling liphansi kakhulu, kuyilapho ukugoqa kunzima, nokuba khona kokucindezeleka okusalayo, ukukhulula kalula, kuthinta ikhwalithi yomugqa oqediwe;Ngakolunye uhlangothi, izinga lokushisa lokugoqa alanele ukwenza i-supersaturated carbonitrides precipitation, ethinta ukusebenza okugoqiwe.Ngakho-ke, ukulawulwa kwezinga lokushisa eligoqiwe ngesakhiwo se-microstructure sangaphakathi ngaphakathi kobubanzi obuchazwe insimbi, esinye isinyathelo esibalulekile sokulawula ikhwalithi ye-Metallurgical Machinery strip.Izinhlobo ezahlukene kanye nokucaciswa kwe-strip, izinga lokushisa layo lokuqeda ukugoqa livame ukuba ngu-800℃, izinga lokushisa lokuqeda insimbi ye-silicon egxile kakhulu livame ukuba ngu-980℃, kanti kumarola okukhipha insimbi ubude obungaphezu kuka-100 m ubude obusebenzayo obungu-5 kuya ku-158 kuphela.Ukuze ngesikhathi esifushane kangaka ukunciphisa izinga lokushisa strip 200 ~ 350℃, imisebe yokushisa yodwa ama-roller okukhipha insimbi kanye nokushisa kwe-roller kundlela yokupholisa yemvelo akunakwenzeka, ama-rollers okukhiphayo kufanele abe kakhulu Ukusetha izindlela zokupholisa amanzi ezisebenza kahle kakhulu zebanga elide le-strip, ukupholisa okuphoqelekile kwendawo yamanzi, nokulawula ngokunembile umthamo wamanzi ukuhlangabezana nezidingo zokushisa kokupholisa.Ukuqaliswa okukhethekile kokulawula izinga lokushisa okupholisayo kusekelwe emishinini yensimbi ehambisana nezici ezihlukene zomucu (impahla, usayizi), kanye nezimo ezihlukene zephoyinti lomugqa ofanayo (izinga lokushisa, isivinini), ukugeleza ngobude besendlalelo sokupholisa (okungukuthi, ukupholisa okuvulekile). Inombolo yenhlokweni) yokulungiswa okuguquguqukayo kobude bengqikithi yamapheshana ukuya endaweni ethile ukusuka ekunembeni okuphezulu kwezinga lokushisa kwe-Qian lokugcina ukuya kuzinga lokushisa elijikayo lokupholisa ngokushesha elidingekayo.