Iyo oxidation yeforgingsinonyanya kukanganiswa nemakemikari ekuumbwa kwesimbi inopisa uye mukati nekunze zvinhu zvemhete yekupisa (yakadai sekuumbwa kwegasi rechoto, kupisa kwekushisa, nezvimwewo).
1) Kemikari yakagadzirwa nesimbi zvinhu
Huwandu hweoxyde scale hwakaumbwa hunoenderana zvakanyanya nekemikari. Iyo yakakwirira iyo kabhoni yesimbi yesimbi, iyo shoma oxide sikero inoumbwa, kunyanya kana kabhoni yemukati inodarika 0.3%. Izvi zvinodaro nekuti mushure mekunge kabhoni yaiswa oxidized, gasi re monoxide (CO) gasi rinoumbwa pamusoro peiyo blank, iyo inobata basa mukudzivisa kuenderera kwe oxidation. Alloy simbi muCr, Ni, Al, Mo, Si uye zvimwe zvinhu, kunyanya kupisa kana kuumbwa kwechiyero kuri kushoma, nekuti zvinhu izvi zvakange zvakasvibiswa, zvinogona kugadzira dhiri pamusoro pesimbi dense oxide firimu, uye iyo uye simbi ine padyo neiyo thermal yekuwedzera coefficient, uye yakasimba yakanamatira kumusoro, haisi nyore kutyora uye kudonha, saka kudzivirira kuwedzera oxidation, kudzivirira. Kupisa kusingapindi simbi isina kupepeta simbi ine alloy simbi ine zvimwe zvezvinhu zviri pamusoro, uye kana zviri mukati Ni uye Cr musimbi iri 13%? Pa20%, inenge isina oxidation inoitika.
2) Furnace gasi kuumbwa
Furnace gasi kuumbwa kune simba guru pakuumbwa kweforgingchikero, zvakafananaforgings dzesimbimumhepo yakasiyana-siyana yekupisa, kuumbwa kwechiyero hakuna kufanana, mune oxidizing choto gasi, kuumbwa kwechiyero ndiko kwakanyanya, chiedza grey, nyore kubvisa; Mune gasi rakarerekera muchoto (kunyanya ine N2) uye kuderedza gasi rechoto (rine CO, H2, nezvimwewo), iyo oxide sikero inoumbwa ishoma uye haisi nyore kubvisa. Kuti uderedze kuumbwa uye kubviswa kwe oxide chiyero, kutarisisa kunofanirwa kubhadharwa kune kutonga kwechoto gasi kuumbwa pane imwe neimwe nhanho yekupisa. Kazhinji kutaura, forgings iri pasi pe1000 ℃, uye oxidized furnace gasi inoshandiswa pakupisa, nokuti tembiricha haina kukwirira panguva ino, iyo oxidation process haina kunyanya kuomarara, uye oxide scale inoumbwa iri nyore kubvisa; Kana tembiricha yadarika 1000 ℃, kunyanya mutembiricha yakabata nhanho, kudzikisa gasi rechoto kana gasi rechoto rakarerekera rinofanira kushandiswa kudzikisa kugadzirwa kweoxide scale.
Hunhu hwegasi revira mumoto wekupisa moto hunoenderana nehuwandu hwemhepo inopiwa kuhuni panguva yekupisa. Kana iyo yakawandisa coefficient yemhepo muchoto yakakura kwazvo, kupihwa kwemhepo kwakawandisa, gasi revira rinoiswa oxidized, iyo metal oxide scale yakawanda, kana iyo yakawandisa coefficient yemhepo muchoto iri 0.4? Pa 0.5, gasi rechoto rinodzikiswa, richigadzira mhepo inodzivirira kudzivirira kuumbwa kwe oxide scale uye kuwana pasina oxidation kupisa.

3) Kupisa kupisa
Iyo tembiricha yekudziya ndiyo zvakare chinhu chikuru chekugadzira chiyero chekugadzira, iyo yakakwira tembiricha yekudziya, iyo yakanyanya oxidation. Mune 570 ℃? Pamberi pe600 ℃, kuumba oxidation kunononoka, kubva 700 ℃ oxidation kumhanya yakakwidziridzwa, kusvika 900 ℃? Pa950 ℃, oxidation yakakosha. Kana iyo oxidation chiyero ichifungidzirwa kuva 1 pa900 ° C, 2 pa1000 ° C, 3.5 pa1100 ° C, uye 7 pa1300 ° C, kuwedzera katanhatu.
4) Kupisa nguva
Iyo yakareba nguva yekudziya yekugadzira mugasi reoxidizing muchoto, iyo oxidation yakawedzera kupararira, uye kuwedzera kweiyo oxide sikero inoumbwa, kunyanya mukupisa kwekushisa kwekupisa, saka nguva yekupisa inofanira kudzikiswa zvakanyanya sezvinobvira. , kunyanya nguva yekupisa uye nguva yekubata pakupisa kwepamusoro inofanira kupfupiswa sezvinobvira.
Mukuwedzera, iyo yekugadzira billet pakupisa kwepamusoro haingori oxidized muchoto chete, asiwo mukugadzira nzira, kunyange zvazvo oxide scale pabillet yakacheneswa, kana tembiricha yebillet ichiri yakakwirira, ichave oxidized kaviri, asi iyo oxidation rate zvishoma nezvishoma inopera nekudzikira kwebillet tembiricha.