Ko nga kapiti whakawhiti ka pa ki te reiti hua kua oti i muri noa i te hurihanga.Whakanuia te wa horoi pire, he nui te kino.Ko te pāmahana papa he rohe pakarukaru o 700-900 ℃.Ko te take te kapiti mata o raro ko 1050-1100 ℃, kapiti whakawhiti i runga i te mata o te take ko te mata pire i te wahanga nui whakatika ahotea tika.Ko te Niobium nitride i roto i nga rohe o te witi austenite ka whakaiti i te kaha here, te rerenga o te rohe o te witi.I tenei wa i roto i te waahanga kopikopiko o te pewa honotanga papa he ngoikore, ka puta he kapiti mata o raro.Kapiti poutū me te hanganga matū, pokepokea ai te pāmahana wai whakamatao, taputapu pokepokea ai, te hanganga matū o te para, tonu te makanga mīhini pū pūnaha tautauā tuarua e pā ana.Nga mahi aukati e pa ana:
1. Whakahaere hanganga maitai.Whakamātauria ki te aukati wC ko 0.12% -0.16% D36 ihirangi waro maitai i roto i te tikanga whakahaere tukanga whakarewa rite ki te rohe o runga.Ka taea te whakaiti i nga kapiti.Rohe tauhohenga peritectic.
2. Mana whātioatanga pāmahana i pokepokea ai tonu, huringa pāmahana pokepokea huarahi whai hua ki te whakapai ake ko te ki te whakapiki ake i te pokepokea ai te wai preheating pūrere.Te pehi i te puta mai o nga kapiti ina huri te rangi.Ka taea hoki te whakamahi i muri i nga wa e mutu ana te ringihanga me te ringihanga kaore i te tuwhera i te wa kei raro iho te pāmahana wai i raro i te 20 ℃ pokepokea ai te wai whakamatao, ki te whakarite i te pāmahana o te ahua o te whakarewanga whakarewa.
3. Whakaritea nga tawhā tukanga whātioatanga ki te whakatika i te nui o te wai te rahi o te pokepokea ai, kia rite ki rerekē matotoru parahi.Na roto i te whakatika i te nui o te wai ki te whakarite i nga wahanga rerekē o te taua pokepokea matao kaha kaha.
4. Ki te whakapai ake i te punaha whakamahana tuarua, te whakapai ake i te pāmahana rohe whakatikatika, ma te arotau i te punaha whakamahana tuarua.Aukati i te whakatika pire rohe pakarukaru, ka pai ake te whakaiti i te tupono o nga kapiti whakawhiti papa.
5. Ko te horoi i te ahua o te whenu me te tango i te kokonga o te kirikiri papa, he huarahi whai hua ki te horoi i te pire papaa mo te whakapumautanga o te kounga.Ka taea e tatou te whakapai ake i te kounga whakamutunga o te papa.