I-oxidation yeama-forgingsithinteka kakhulu ekubunjweni kwamakhemikhali ensimbi evuthayo kanye nezici zangaphakathi nezangaphandle zendandatho yokushisa (njengokwakheka kwegesi yesithando somlilo, izinga lokushisa lokushisa, njll.).
1) Ukwakheka kwamakhemikhali kwezinto zensimbi
Inani le-oxide esikalini elakhiwe lihlobene eduze nokwakheka kwamakhemikhali. Ukuphakama kwekhabhoni yensimbi, kwakheka isikali se-oxide esincane, ikakhulukazi uma okuqukethwe kwekhabhoni kudlula u-0.3%. Lokhu kungenxa yokuthi ngemva kokuba i-carbon i-oxidized, ungqimba lwegesi ye-monoxide (CO) yakheka ebusweni bendawo engenalutho, edlala indima ekuvimbeleni ukuqhubeka kwe-oxidation. Insimbi ye-alloy ku-Cr, i-Ni, i-Al, i-Mo, i-Si nezinye izakhi, ukushisa okuthe xaxa lapho ukwakheka kwesikali kuncane, ngoba lezi zakhi zenziwe nge-oxidized, zingakha ungqimba ebusweni befilimu yensimbi eminyene ye-oxide, futhi futhi insimbi iseduze ne-coefficient yokwandisa okushisayo, futhi inamathele ngokuqinile ebusweni, akulula ukuphuka nokuwa, ngakho-ke ukuvimbela i-oxidation eyengeziwe, ukuvikela. Insimbi engangeni ekushiseni i-alloy steel enezinto eziningi ezingenhla, futhi lapho okuqukethwe kwe-Ni ne-Cr ensimbi kungu-13%? Ku-20%, cishe akukho oxidation eyenzekayo.
2) Ukwakheka kwegesi yesithando somlilo
Ukwakheka kwegesi yesithando somlilo kunethonya elikhulu ekubunjweni kweukuqambaisikali, okufanayoizinsimbi zensimbiendaweni yokushisa ehlukene, ukwakheka kwesikali akufani, kugesi oxidizing esithandweni somlilo, ukwakheka kwesilinganiso kuningi, okumpunga okukhanyayo, okulula ukususa; Kugesi yesithando somlilo esingathathi hlangothi (ikakhulukazi equkethe i-N2) kanye negesi yokunciphisa isithando somlilo (equkethe i-CO, i-H2, njll.), isikali se-oxide esakhiwe simnyama kancane futhi akulula ukusisusa. Ukuze kuncishiswe ukwakheka nokususwa kwesikali se-oxide, ukunakwa kufanele kukhokhwe ekulawuleni ukubunjwa kwegesi yesithando somlilo esigabeni ngasinye sokushisa. Ngokuvamile, ama-forging angaphansi kwe-1000 ℃, futhi igesi yomlilo ene-oxidized isetshenziswa lapho kushisa, ngoba izinga lokushisa alikho phezulu ngalesi sikhathi, inqubo ye-oxidation ayinzima kakhulu, futhi isikali se-oxide esakhiwe kulula ukususa; Uma izinga lokushisa lidlula i-1000 ℃, ikakhulukazi esiteji sokubamba izinga lokushisa eliphezulu, ukunciphisa igesi yesithando somlilo noma igesi yesithando somlilo engathathi hlangothi kufanele isetshenziselwe ukunciphisa ukukhiqizwa kwesikali se-oxide.
Imvelo yegesi yesithando somlilo esithandweni sokushisa ilangabi incike kumthamo womoya onikezwa uphethiloli ngesikhathi sokusha. Uma i-coefficient eyengeziwe yomoya esithandweni sikhulu kakhulu, ukunikezwa komoya kukhulu kakhulu, igesi yesithando somlilo i-oxidized, isikali se-oxide yensimbi singaphezulu, uma i-coefficient yomoya eyeqile esithandweni ingu-0.4? Ngo-0.5, igesi yesithando somlilo iyancishiswa, yakha umkhathi ovikelayo ukuze ugweme ukwakheka kwesikali se-oxide futhi ungaphumeleli ukushisa kwe-oxidation.

3) Ukushisa kokushisa
Izinga lokushisa lokushisa liphinde libe yisici esiyinhloko sokwakheka kwesikali sokubumba, izinga lokushisa eliphakeme kakhulu, i-oxidation ishube kakhulu. Ku-570 ℃? Ngaphambi kuka-600 ℃, ukubumba i-oxidation kuhamba kancane, kusuka ku-700 ℃ isivinini se-oxidation sisheshisiwe, siye ku-900 ℃? Ku-950 ℃, i-oxidation ibaluleke kakhulu. Uma izinga le-oxidation licatshangwa ukuthi lingu-1 ku-900 ° C, 2 ku-1000 ° C, 3.5 ku-1100 ° C, no-7 ku-1300 ° C, ukwanda izikhathi eziyisithupha.
4) Isikhathi sokushisa
Lapho isikhathi sokushisa sama-forging egesi ene-oxidizing esithandweni somlilo, kukhulu ukusakazeka kwe-oxidation, futhi kwakheka isikali se-oxide, ikakhulukazi esigabeni sokushisa okuphezulu, ngakho-ke isikhathi sokushisa kufanele sincishiswe ngangokunokwenzeka. , ikakhulukazi isikhathi sokushisa kanye nesikhathi sokubamba ekushiseni okuphezulu kufanele kufinyezwe ngangokunokwenzeka.
Ngaphezu kwalokho, i-billet yokubumba ekushiseni okuphezulu ayigcini nje nge-oxidized esithandweni, kodwa futhi nenqubo yokubumba, nakuba isikali se-oxide ku-billet sihlanzwa, uma izinga lokushisa le-billet lisephezulu, lizobe li-oxidized kabili, kodwa izinga le-oxidation liya ngokuya liba buthaka ngokuncipha kwezinga lokushisa le-billet.