A cikin yanayin zafi na ƙirƙira, saboda babban ƙarfin wutar lantarki da dogon lokacin rufewa, yawan amfani da makamashi yana da girma a cikin duka tsari, a cikin dogon lokaci, yadda za a adana makamashi a cikin yanayin zafi na ƙirƙira ya kasance. matsala mai wahala.

Abin da ake kira "zero insulation" quenching, shine nunawa ga ƙirƙira dumama, samansa da ainihinsa don isa ga zafin jiki mai zafi, babu rufi, nan da nan yana kashe tsarin sanyaya. Bisa ga ka'idar austenitic na gargajiya, ƙirƙira dole ne ya sami dogon lokaci. lokacin rufewa a cikin tsarin dumama, don kammala nucleation da haɓakar hatsin austenitic, rushewar siminti mai saura da homogenization na austenitic.The halin yanzu quenching da dumama fasahar forgings da aka samar a karkashin jagorancin wannan ka'idar.Idan aka kwatanta da halin yanzu quenching tsari, "sifili zafi adana" quenching ceton lokacin zafi adana ake bukata ta homogenization na austenitic tsarin, ba kawai. iya ajiye 20% -30% na makamashi, inganta samar da yadda ya dace 20% -30%, amma kuma zai iya rage ko kawar da lahani na hadawan abu da iskar shaka, decarbonization, nakasawa da sauransu, wanda ya dace da inganta ingancin samfurin.

Lokacin da carbon karfe da low gami karfe suna mai tsanani zuwa Ac1 ko Ac2, da homogenization tsari na austenite da narkar da carbides a cikin pearlite ne sauri.Lokacin da karfe size nasa ne na bakin ciki sashi kewayon, lissafin dumama lokaci ba ya bukatar la'akari. da thermal rufi, wato, don cimma sifili thermal insulation quenching. Misali, lokacin da diamita ko kauri na 45 karfe workpiece bai wuce ba. 100mm, dumama a cikin tanderun iska, yawan zafin jiki na saman da ainihin ya kusan isa a lokaci guda, don haka ana iya yin watsi da lokacinsa na uniform, idan aka kwatanta da tsarin samar da al'ada (r = aD) tare da babban adadin dumama, yana iya zama rage ta kusan 20% -25% quenching dumama lokaci.

The theoretical analysis da gwaji sakamakon nuna cewa yana yiwuwa a yi amfani da "sifili rufi" a quenching da normalizing dumama na tsarin karfe.Musamman, 45, 45 mn2 carbon tsarin karfe ko guda kashi gami tsarin karfe, da yin amfani da "sifili rufi" tsari iya tabbatar da inji Properties na bukatun; 45, 35CrMo, GCrl5 da sauran tsarin karfe workpiece, da amfani. na "sifili rufi" dumama fiye da gargajiya dumama iya ajiye dumama lokaci na game da 50%, jimillar makamashi tanadi na 10% -15%, inganta yadda ya dace na 20% -30%, a lokaci guda "sifili rufi" quenching tsari. yana taimakawa wajen tsaftace hatsi, inganta ƙarfin.

(Daga: 168 forgings net)