Uthini umxholo wenitrogen wentsimbi enyibilikisiweyo ngeziko lokunyibilikisa lokunyuselwa?

Xa inyibilika kwi-cupola, umxholo we-nitrogen kwi-iron grey cast ngokubanzi ngu-0.004 ~ 0.007%.

Intsimbi yentsimbi iqulethe inani elincinci le-nitrogen, elinokukhuthaza i-pearlite kwaye incede ukuphucula iimpawu ze-mechanical of iron cast. Ukuba umxholo we-nitrogen ungaphezulu kwe-0.01%, ukuphosa kuxhomekeke kwi-nitrogen-induced pores.

Ngokuqhelekileyo, umxholo we-nitrogen kwintsimbi ye-scrap uphezulu kakhulu kunalowo wesinyithi. Xa kunyibilikiswa intsimbi etyhidiweyo kwi- ukuchithwa kwesithando somlilo, kuba kukho iingots ezimbalwa zentsimbi kunye nentsimbi yentsimbi esetyenzisiweyo kwintlawulo, umxholo we-nitrogen kwintsimbi etyhidiweyo eveliswa ngokunyibilikisa iya kuba phezulu ngokuhambelanayo. phezulu. Ukongeza, ngenxa yobuninzi bentsimbi esetyenzisiweyo kwintlawulo, kufuneka kusetyenziswe ii-recarburizers, kwaye uninzi lwe-recarburizers lunomxholo ophezulu we-nitrogen, ongomnye umba obangela ukuba umxholo we-nitrogen kwintsimbi yokuphosa unyuke.

Ngoko ke, xa inyibilikiswa kwisithando somlilo se-induction, umxholo we-nitrogen kwintsimbi etyhidiweyo uphezulu kune-cupola. Ngokuqhelekileyo, xa isixa sentsimbi ye-scrap kwisithando somlilo si-15%, umxholo we-nitrogen kwintsimbi etyhidiweyo malunga ne-0.003 ~ 0.005%; xa isixa sentsimbi ye-scrap yi-50%, umxholo we-nitrogen ungafikelela kwi-0.008 ~ 0.012%; xa intlawulo yonke intsimbi ye-scrap, umxholo we-nitrogen unokuba ngu-0.014% okanye ngaphezulu.