A oxidation naƙirƙirayafi shafan sinadarai na karfe mai zafi da kuma abubuwan ciki da na waje na zoben dumama (kamar tanderun gas abun da ke ciki, zazzabi mai zafi, da sauransu).
1) Chemical abun da ke ciki na karfe kayan
Adadin ma'auni na oxide da aka kafa yana da alaƙa da haɗin gwiwar sinadaran. Mafi girman abun ciki na carbon na karfe, ƙananan sikelin oxide yana samuwa, musamman lokacin da abun ciki na carbon ya wuce 0.3%. Wannan shi ne saboda bayan carbon oxidized, wani Layer na monoxide (CO) gas yana samuwa a saman babur, wanda ke taka rawa wajen hana ci gaba da iskar oxygen. Alloy karfe a Cr, Ni, Al, Mo, Si da sauran abubuwa, da more dumama lokacin da samuwar sikelin ne kasa, saboda wadannan abubuwa da aka oxidized, za su iya samar da wani Layer a saman karfe m oxide fim, kuma shi da karfe yana da kusa da thermal fadada coefficient, kuma da tabbaci a haɗe zuwa surface, ba sauki karya da kuma fada kashe, don haka don hana kara hadawan abu da iskar shaka, kariya. Karfe mai jure zafi wanda ba kwasfa ba shine ƙarfe na alloy tare da ƙarin abubuwan da ke sama, kuma lokacin da abun ciki na Ni da Cr a cikin ƙarfen ya kasance 13%? A 20%, kusan babu oxidation yana faruwa.
2) Tanderu gas abun da ke ciki
Abubuwan da ke cikin wuta na gas yana da tasiri mai girma akan samuwarƙirƙirasikelin, iri dayakarfe forgingsa cikin yanayi daban-daban na dumama, samuwar sikelin ba daidai ba ne, a cikin iskar gas mai oxidizing, samuwar sikelin shine mafi yawan, launin toka mai haske, mai sauƙin cirewa; A cikin wutar lantarki mai tsaka-tsaki (wanda ya ƙunshi N2) da kuma rage iskar gas (wanda ya ƙunshi CO, H2, da dai sauransu), ma'aunin oxide da aka kafa bai zama baƙar fata ba kuma ba shi da sauƙin cirewa. Don rage girman samuwar da kuma kawar da sikelin oxide, ya kamata a biya hankali ga sarrafa abubuwan da ke cikin tanderun gas a kowane mataki na dumama. Gabaɗaya magana, ƙirƙira suna ƙasa da 1000 ℃, kuma ana amfani da iskar gas mai oxidized lokacin dumama, saboda yanayin zafi ba ya da yawa a wannan lokacin, tsarin iskar oxygen ba shi da wahala sosai, kuma ma'aunin oxide da aka kafa yana da sauƙin cirewa; Lokacin da zafin jiki ya wuce 1000 ℃, musamman a cikin babban matakin riƙe zafin jiki, rage iskar gas ko tsaka tsaki ya kamata a yi amfani da shi don rage samar da sikelin oxide.
Yanayin iskar gas a cikin tanderun dumama harshen wuta ya dogara da yawan iskar da ake bayarwa ga mai yayin konewa. Idan wuce haddi coefficient na iska a cikin tanderun ne ma girma, samar da iska ne da yawa, da tanderun gas ne oxidized, karfe oxide sikelin ne mafi, idan wuce haddi coefficient na iska a cikin tanderun ne 0.4? A 0.5, iskar gas ɗin tanderun yana raguwa, yana samar da yanayi mai karewa don gujewa samuwar sikelin oxide kuma ba a sami dumama oxidation ba.

3) Zafin zafi
Har ila yau, zafin jiki na dumama shine babban dalilin ƙirƙira sikelin ƙirƙira, mafi girman yanayin zafi, mafi tsananin iskar shaka. A cikin 570 ℃? Kafin 600 ℃, ƙirƙira hadawan abu da iskar shaka ne jinkirin, daga 700 ℃ hadawan abu da iskar shaka gudun kara, zuwa 900 ℃? A 950 ℃, oxidation yana da mahimmanci. Idan ana tsammanin adadin iskar oxygen ya zama 1 a 900 ° C, 2 a 1000 ° C, 3.5 a 1100 ° C, da 7 a 1300 ° C, haɓaka sau shida.
4) Lokacin zafi
Da tsawon lokacin dumama na'urorin da ke cikin iskar oxygen da ke cikin tanderun da ke cikin tanderu, mafi girman yaduwar iskar oxygen, da kuma haɓaka ma'aunin oxide, musamman ma a matakin dumama zafin jiki, don haka ya kamata a rage lokacin dumama gwargwadon yiwuwa, musamman lokacin dumama da lokacin riƙewa a babban zafin jiki ya kamata a rage gwargwadon yiwuwar.
Bugu da kari, billet ɗin ƙirƙira a babban zafin jiki ba kawai oxidized a cikin tanderu ba, har ma a cikin tsarin ƙirƙira, kodayake ana tsaftace sikelin oxide akan billet, idan har yanzu zafin billet ɗin yana da girma, za'a yi oxidized sau biyu, amma ƙimar iskar oxygen a hankali yana raguwa tare da raguwar zafin billet.