Ingakanani i-nitrogen yensimbi encibilikisiwe ngesithando somlilo esincibilikayo?

Uma incibilikiswa ku-cupola, okuqukethwe kwe-nitrogen kunsimbi empunga ngokuvamile kuba ngu-0.004~0.007%.

I-cast iron iqukethe inani elincane le-nitrogen, elingakhuthaza i-pearlite futhi lisize ukuthuthukisa izakhiwo zemishini yensimbi ekhonjiwe. Uma okuqukethwe kwe-nitrogen kungaphezu kuka-0.01%, ukubunjwa kuvame ukuba nezimbotshana ezenziwe nge-nitrogen.

Ngokuvamile, okuqukethwe kwe-nitrogen ku-scrap steel kuphezulu kakhulu kunaku-cast iron. Uma uncibilikisa insimbi ewuketshezi endaweni ukuchithwa kwesithando somlilo, njengoba kunezinsimbi ezimbalwa zensimbi ezisansimbi kanye nezinsimbi ezilahliwe ezengeziwe ezisetshenziswa ekushajweni, okuqukethwe kwe-nitrogen ensimbini ekhiqizwe ukuncibilikiswa kuzoba phezulu ngokulinganayo. phezulu. Ngaphezu kwalokho, ngenxa yenani elikhulu lezinsimbi ezilahliwe ezisetshenziswa ekukhokhiseni, ama-recarburizers kufanele asetshenziswe, futhi iningi lama-recarburizers anokuqukethwe kwe-nitrogen ephezulu uma kuqhathaniswa, okungenye into edala ukuthi okuqukethwe kwe-nitrogen kunsimbi ekhonjiwe kukhule.

Ngakho-ke, lapho incibilikiswa esithandweni sokuncibilika sokungeniswa, okuqukethwe kwe-nitrogen kunsimbi ecijile kuphezulu kunalokho okuseqoqweni. Ngokuvamile, lapho inani lensimbi yensimbi esithandweni somlilo lingu-15%, okuqukethwe kwe-nitrogen ku-cast iron cishe ku-0.003 ~ 0.005%; lapho inani le-scrap steel lingama-50%, okuqukethwe kwe-nitrogen kungafinyelela ku-0.008 ~ 0.012%; lapho inkokhiso iyinsimbi eyizinsimbi, okuqukethwe kwe-nitrogen kungaba phezulu njengokufika ku-0.014% noma ngaphezulu.