1) A cikin yanayin canji mai canzawa shine zane na hali na hali, shine, kusan 500-600 ℃, ruwa a cikin Steam, ruwa a cikin Storming sanyaya da kuma isasshen sanyayagyarwar saurikuma samuwar "aya mai taushi" .in tsarin canji na martaba, wato kusan 300-100 ℃, Ruwan yayi zafi yana da sauri, da sauƙin yin saurin canjin martaba ya yi sauri Kuma samar da danniya da yawa, yana haifar da rashin jin dawwama har ma da fatattaka.

2) Ruwan zafin ruwa yana da babban tasiri akan ƙarfin sanyaya, don haka yana kula da canjin zafin jiki na yanayi. Kamar yadda ruwan zafin ruwa ya tashi, ƙarfin sanyi ya ragu sosai, kuma kewayon zafin jiki na matsakaiciyar ruwa ya wuce 30 ℃, ƙididdigar mai sanyaya tana raguwa a cikin kewayon 500-600 ℃, wanda sau da yawa yana haifar da taurarinyi zura da, amma ba shi da ɗan lokaci akan ƙimar sanyaya a cikin kewayon canji na Martensite. Duk lokacin da ruwa zazzabi zai ragu zuwa kusan 50%.

Lokacin da ruwan ya ƙunshi ƙarin gas (kamar sabon canjin ruwa), ko ruwa hade da insolable impurities, kamar yadda ya kamata ya rage hankali da hankali ya kamata a biya shi da kulawa da gudanarwa .
Dangane da halayen sanyaya na ruwa, ruwa gaba daya ana iya amfani da shi zuwa quenching sanyaya carbonkarfe sun manta daTare da karamin girman sashi da kuma mai sauki. Workpiece a lokacin da aka kashe (ko sanya aikin motsa jiki sama da ƙasa) don karkatar da sanyaya Steam tsakanin 500-650 ℃, yanayin sanyi, yana gujewa samar da ma'ana mai laushi.