I-billet esetshenziselwa ukukhiqizwa kwamapayipi ensimbi ibizwa ngokuthi i-tube billet. Ngokuvamile izinga eliphezulu (noma ingxubevange) insimbi eyindilinga eqinile isetshenziswa njenge-tube billet. Ngokwezindlela ezihlukene zokukhiqiza, amashubhu angenamthungo anamabhilidi enziwe ngezinsimbi zensimbi, amabhilidi aqhubekayo okuphonswa, amabhilidi e-forging, amabhilidi agayiwe kanye namabhilidi angenalutho e-centrifugally. i-tube billet ibaluleke kakhulu.

Ngokuvamile, i-tube blank ibhekisela ku-round tube billet. Ubukhulu be-tube billet eyindilinga imelelwa ububanzi bensimbi eyindilinga eqinile. Ukulungiswa kwe-tube billet kuhlanganisa ukukhethwa kwemodeli ye-tube billet kanye nokucaciswa, ukwakheka kwamakhemikhali nokuhlolwa kwesakhiwo, ukuhlolwa kokukhubazeka okungaphezulu nokuhlanza, ukusika, ukugxila, njll.
Inqubo yokukhiqiza ye-seamless steel tube billet imi kanje:

Ironmaking – Steelmaking – Open Hearth Steel (noma Electric Furnace Steel and Oxygen Blowing Converter Steel) – Ingot – Billeting – Rolled Round Bar – Tube Billet

A) Ukuhlukaniswa kwamabhilidi wensimbi engenamthungo

I-seamless steel tube billet ingahlukaniswa ngokwendlela yokucubungula, ukwakheka kwamakhemikhali, indlela yokwenza, izimo zokusetshenziswa, njll. kweshubhu lensimbi.
Isibonelo, ngokwendlela yokwelapha, ingahlukaniswa ibe yi-billet yepayipi yensimbi yesithando somlilo, i-converter steel pipe billet kanye ne-electroslag steel pipe billet; ngokwendlela yokwenza, ingahlukaniswa ibe ingot yensimbi, i-billet yepayipi eqhubekayo, i-billet yepayipi ehlanganisiwe, i-billet yepayipi eligoqiwe kanye ne-centrifugal casting hollow tube. Ngokusho kokwakheka kwamakhemikhali, ingahlukaniswa nge-carbon steel pipe billet, i-alloy steel pipe billet, i-billet yepayipi yensimbi engagqwali kanye ne-billet yepayipi ye-alloy engagqwali; Ukubhoboza kanye nama-geological drilling ama-tube billets, ama-billet amashubhu ezitshalo zikamanyolo, ama-tube billets anamashubhu, namanye ama-tube billets anenhloso ekhethekile.

B) Ukukhethwa kwamashubhu ensimbi engenamthungo

Ukukhethwa kwama-tube billets ensimbi engenamthungo kuhlanganisa ukukhethwa kwamabanga ensimbi, ukucaciswa, izindlela zokuncibilikisa nezindlela zokwakha.
Khetha amamaki ensimbi, izindlela zokucubungula nezindlela zokwakha ngokuya ngamazinga omkhiqizo noma oda izimo zobuchwepheshe. Ukukhethwa kosayizi we-billet kusekelwe ekutholeni usayizi we-billet ohambisanayo etafuleni eligoqayo ngokuya ngosayizi wepayipi lensimbi.

Ngokuvamile, izigayo zamapayipi ensimbi ezingenamthungo zisebenzisa insimbi yokuguqula ecwengekile noma insimbi yesithando somlilo kagesi ngokusakazwa okuqhubekayo kwamabhilidi ayindilinga.
Lapho izinga lensimbi noma ukucaciswa kungakwazi ukuphonswa ngokuqhubekayo, insimbi encibilikisiwe noma i-centrifugal casting yenziwa ibe yi-billet eyindilinga eyindilinga. Lapho usayizi weshubhu elingenalutho lingakwazi ukuhlangabezana nezidingo zesilinganiso sokuminyanisa, ishubhu kasayizi omkhulu engenalutho ingakhethwa futhi igoqwe noma yenziwe ngomgunyathi ukuze ibe ishubhu engenalutho ehlangabezana nezidingo zosayizi. Ifomula yokubala yesilinganiso sokucindezela imi kanje: K=F, 1F lapho u-K eyisilinganiso sokucindezela; F——indawo ephambanayo yeshubhu engenalutho, mm; F——indawo ephambanayo yepayipi lensimbi, mm.

Uma kunezidingo eziqinile mayelana nokufana kweshubhu elingenalutho, okuqukethwe okufakiwe noma okuqukethwe kwegesi, ishubhu elingenalutho elincibilikiswe nge-electroslag noma isithando somlilo se-vacuum degassing ngokuvamile sisetshenziswa.