Mu kutentha mankhwala a forging, chifukwa cha mphamvu yaikulu ya ng'anjo Kutentha ndi nthawi yaitali kutchinjiriza nthawi, mowa mphamvu ndi yaikulu mu ndondomeko yonse, mu nthawi yaitali, mmene kupulumutsa mphamvu mu kutentha mankhwala forging wakhala. vuto lovuta.

Zomwe zimatchedwa "zero kutchinjiriza" kuzimitsa, ndikuloza kutenthetsa kopangira, pamwamba pake ndi pachimake kuti zifike kutentha kutentha, palibe kutchinjiriza, nthawi yomweyo kuzimitsa kuzizira. Insulation nthawi mu Kutentha ndondomeko, kuti amalize nucleation ndi kukula kwa mbewu austenitic, Kutha kwa otsalira cementite ndi homogenization wa austenitic.The panopa kuzimitsidwa ndi Kutentha luso la forgings amapangidwa motsogozedwa ndi chiphunzitso ichi. panopa kuzimitsa ndondomeko, "ziro kutentha kuteteza" kuzimitsa amapulumutsa nthawi kuteteza kutentha chofunika ndi homogenization wa dongosolo austenitic, osati akhoza kupulumutsa 20% -30% ya mphamvu, kusintha kupanga dzuwa 20% -30%, komanso akhoza kuchepetsa kapena kuchotsa zolakwika za okosijeni, decarbonization, mapindikidwe ndi zina zotero, zomwe zimathandiza kupititsa patsogolo khalidwe lazogulitsa.

Pamene zitsulo za carbon ndi low alloy zitsulo zimatenthedwa ku Ac1 kapena Ac2, ndondomeko ya homogenization ya austenite ndi kusungunuka kwa carbides mu pearlite imakhala mofulumira. mwachitsanzo, pamene m'mimba mwake kapena makulidwe a 45 chitsulo workpiece saposa 100mm, kutentha mu ng'anjo ya mpweya, kutentha kwa pamwamba ndi pachimake pafupifupi kufika pa. nthawi yomweyo, kotero nthawi yake yunifolomu akhoza kunyalanyazidwa, poyerekeza ndi chikhalidwe kupanga ndondomeko (r = aD) ndi lalikulu kutentha koyenera, akhoza kuchepetsedwa pafupifupi 20% -25% quenching Kutentha nthawi.

Kusanthula kwamalingaliro ndi zotsatira zoyeserera zikuwonetsa kuti ndizotheka kutengera "kutchinjiriza zero" pozimitsa ndi kutenthetsa kutentha kwachitsulo chokhazikika. Makamaka, 45, 45 mn2 carbon structural steel kapena single element alloy structural steel, kugwiritsa ntchito "zero insulation" ndondomeko akhoza kuonetsetsa katundu mawotchi zofunika; 45, 35CrMo, GCrl5 ndi zina structural zitsulo workpiece, ntchito "zero kutchinjiriza" Kutentha kuposa Kutentha chikhalidwe angapulumutse Kutentha nthawi pafupifupi 50%, ndalama okwana mphamvu 10% - 15%, kusintha mphamvu ya 20% -30%, nthawi yomweyo "zero kutchinjiriza" quenching ndondomeko kumathandiza kuyenga tirigu, kusintha mphamvu.

(Kuchokera: 168 forgings net)