Kuzimitsa ndi kutentha kutentha kwa 40Cr chitsulo?

Kodi quenching ndi tempering kutentha mankhwala40Cr chitsulo?

40Cr imapangitsa kuuma kwachitsulo, kumawonjezera mphamvu zake ndi kukhazikika kwake, ndipo imakhala ndi makina abwino kwambiri.Zida zogwirira ntchito zokhala ndi miyeso yayikulu kapena zosintha zofunika ziyenera kugwiritsa ntchito chitsulo cha Cr, koma Cr chitsulo chimakhala ndi mtundu wachiwiri wa kupsa mtima.

Kodi timakumana bwanji ndi kutentha ndi kutentha kwazitsulo za 40Cr ndi malamulo osiyanasiyana a makadi a makadi pa ntchito yeniyeni?

(1) Pambuyo pozimitsa ndi kutentha kutentha kwa 40Cr workpieces, kuziziritsa mafuta kuyenera kugwiritsidwa ntchito.Chitsulo cha 40Cr chili ndi zinthu zabwino zozimitsa, zimatha kuumitsidwa ndi kuziziritsa mumafuta, ndipo chizolowezi cha zida zopunduka ndi kung'amba ndizochepa.Komabe, mabizinesi ang'onoang'ono ndi apakatikati amatha kuyatsa zida zowoneka bwino m'madzi pomwe mafuta ali olimba, koma palibe ming'alu yomwe imapezeka.Komabe, ogwira ntchito ayenera kuyang'anira madzi ndi kutentha kwake potengera zomwe akumana nazo.

(2) Pambuyo pa kutentha, kuuma kwa 40Cr workpiece kukadali kokwera kwambiri, ndipo kutentha kwachiwiri kuyenera kuwonjezeka ndi 20-50.Apo ayi, n'zovuta kuchepetsa kuuma.

(3) Pambuyo pa kutentha kwapamwamba kwa 40Cr workpieces, mawonekedwe ovuta amazizidwa mu mafuta komanso m'madzi kuti apewe kukhudzidwa kwa mtundu wachiwiri wa brittleness.The workpiece pambuyo kutentha mofulumira ndi kuziziritsa ayenera kuthandizidwa ndi mpumulo nkhawa ngati n'koyenera.Pali zinthu zitatu zomwe zimakhudza ubwino wa workpiece yosinthidwa, ndipo mlingo wa woyendetsa ndi chinthu chofunika kwambiri.Palinso zifukwa zosiyanasiyana monga zida, zipangizo, ndi chisanadze kusintha processing.Timakhulupirira kuti (1) kuthamanga kwa workpiece kusuntha kuchokera ku ng'anjo kupita ku thanki yozizira kumachedwa, ndipo kutentha kwa workpiece kulowa m'madzi kwatsika pansi pa mfundo yovuta ya Ar3, zomwe zimapangitsa kuwonongeka pang'ono ndi microstructure yosakwanira ya workpiece. , zomwe sizikukwaniritsa zofunikira zowuma.Chifukwa chake, zoziziritsa kukhosi zing'onozing'ono ziyenera kulabadira kuthamanga, pomwe kuti zida zazikulu ziziziziritsa, ndikofunikira kumvetsetsa nthawi.(2) Kuchuluka kwa ng'anjo yosungunuka ya workpiece kuyenera kukhala koyenera, ndi zigawo za 1-2 kukhala zoyenera.Pamene workpiece ikudutsana wina ndi mzake, Kutentha kumakhala kosagwirizana ndipo kuuma kumakhala kosagwirizana.(3) Makonzedwe a ingress ya madzi mu workpiece ayenera kusungidwa patali.Chifukwa cholimba kwambiri, filimu ya nthunzi pafupi ndi workpiece imasweka ndikulepheretsa, zomwe zimapangitsa kuti pakhale kuuma kwapansi kwa workpiece.(4) Kutsegula ng’anjo yozimitsa sikungathe kuzimitsa nthawi imodzi.M'pofunika kuzimitsa ng'anjo pakatikati ndi kutenthetsanso molingana ndi mlingo wa kutentha kuchepa mu ng'anjo.Kuuma kwa workpieces kutsogolo ndi kumbuyo pambuyo kuzimitsa kuyenera kukhala kofanana.(5) Samalani ndi kutentha kwa madzi ozizira.10% ya madzi amchere pamwamba pa 60 sangagwiritsidwe ntchito.Madzi ozizira ayenera kukhala opanda zonyansa monga mafuta ndi matope.Apo ayi, kuuma kosakwanira kapena kosafanana kungachitike.(6) Osafanana kusintha kuuma kwa zosoweka zosakonzedwa.Kuti musinthe bwino, zopangira zake ziyenera kukhala tiyi woyipa, ndipo mileme iyenera kugwiritsidwa ntchito.(7) Pambuyo pakuwongolera bwino, kuuma kumachepa ndi mayunitsi 1-3 mutatha kuzimitsa, ndipo kutentha kwapang'onopang'ono kungasinthidwe kuti mukwaniritse zofunikira za kuuma.Komabe, moto utatha, kuuma kwa workpiece kunali kochepa kwambiri, ndipo HRC250000 mpaka 350000 yokha ndi yomwe ingayambitsidwenso.Sizingatheke kuwonjezera kutentha kwapakati kapena kochepa kuti mukwaniritse zofunikira zojambula.Apo ayi, tanthauzo la olamulira lidzatayika, zomwe zimabweretsa zotsatirapo zoopsa.