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, kuti amalize nucleation ndi kukula kwa mbewu austenitic, kusungunuka kwa otsalira simenti ndi homogenization. wa austenitic.The panopa quenching ndi Kutentha ukadaulo wa forgings amapangidwa motsogozedwa ndi chiphunzitso ichi.Poyerekeza ndi ndondomeko quenching panopa, "zero kutentha kuteteza" quenching amapulumutsa nthawi kuteteza kutentha chofunika ndi homogenization wa dongosolo austenitic, osati akhoza. kupulumutsa 20% -30% ya mphamvu, kusintha kupanga dzuwa 20% -30%, komanso kuchepetsa kapena kuthetsa zofooka za makutidwe ndi okosijeni, decarbonization, mapindikidwe ndi zina zotero, zomwe zimathandizira kuwongolera kwazinthu.

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. The kutchinjiriza matenthedwe, ndiye kuti tikwaniritse ziro matenthedwe kutchinjiriza quenching.Mwachitsanzo, pamene m'mimba mwake kapena makulidwe a 45 zitsulo workpiece saposa 100mm, kutentha mu ng'anjo ya mpweya, kutentha kwa pamwamba ndi pachimake pafupifupi kufika nthawi yomweyo, kotero nthawi yake yunifolomu akhoza kunyalanyazidwa, poyerekeza ndi chikhalidwe kupanga ndondomeko (r = aD) ndi lalikulu kutentha koyenera, akhoza kunyalanyazidwa. kuchepetsedwa ndi pafupifupi 20% -25% kuzimitsa nthawi yotentha.

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 makina zofunika; 45, 35CrMo, GCrl5 ndi zina zomangamanga zitsulo workpiece, ntchito Kutentha kwa "zero insulation" kuposa kutentha kwachikhalidwe kumatha kupulumutsa nthawi yotentha pafupifupi 50%, kupulumutsa mphamvu kwa 10% -15%, kumapangitsa kuti 20% -30% igwire bwino ntchito, nthawi yomweyo "zero insulation" njira yozimitsa imathandizira. kuyenga tirigu, kulimbitsa mphamvu.

(Kuchokera: 168 forgings net)