Whakaritenga o te iti-waro maitai i te pāmahana rūma deformation o ferrite me te pearlite, ki te reira ko te hanganga ropu o te ferrite me te pearlite tauutuutu whiu whakahaere.Wao waro iti hanganga paipa paipa tuitui, i te pāmahana rūma ki te pāmahana noa, ka te mā Ac1 pāmahana, puta te huringa eutectoid, huringa pearlite o austenite.I tenei keehi, ko nga waahanga ehara i te austenite homogeneous, me te pāmahana whakawera nui atu i te Ac3, ka oti te otinga totoka ferrite, katahi ka huri te hanganga o te maitai ki te austenite kotahi-waahanga, i te mea kei te piki haere tonu te pāmahana me te whakarite i te whakamahana o te pāmahana, te austenite tino rite.

I tukuna mai i te mea whakamahana o te pāmahana I muri i te hekitanga, ka whakakorehia te reiti whakamahana o te rino ki te whakakore i te hanganga takai nui me te reiti whakamahana tino nui (arā, te pehanga ferrite e heke mai i te reiti whakamahana austenite), ka pehia te paipa maitai eutectoid ferrite tinana, kia karekau te ferrite e whakaheke me te tango whakarewa ka noho tonu ki roto i te austenite, a ka heke te pāmahana ma te whakanui ake i te tohu o te supercooling, a ka kore e puta ano te ferrite pro-eutectoid, na te hua whakapohehe austenite supercooled tika ki te eutectoid ferrite + cementite, engari kaore i rite ki te eutectoid te titonga maitai, e kiia ana ko "pseudo-eutectoid" na te mea "pseudo-eutectoid" kaore he eutectoid ferrite i te oranga o te tinana, no reira kaore te hanganga moroiti o te hanganga tira maitai.Ko te whakamahana paipa mai i te tunua i muri i te whakamaaramatanga o te pāmahana, he iti ake te reiti whakamahana i te hanganga roopu o te maitai hei whakakore i te reiti whakamahana tino nui o te whakamahana puhoi, ka heke te pāmahana ki te Ac3, ka heke te waro maitai austenitic ferritic rohe rerenga i mua ( Ko te waro -te rohe rawakore o te wahanga matua e pa ana ki te hanganga roopu), me te heke puhoi te whakamahana me te pāmahana ka piki haere te rahi o te ferrite eutectoid tae noa ki te makariri ki te Ac1 ka austenite ki te pearlite, i te pāmahana rūma Ko te hangahanga moroiti o te maitai, ka puta te ahua ferrite me te pearlite. roopu kotahi whakahaere.