1. Kodi mfundo yofewa yozimitsa ndi chiyani
Zomwe zimatchedwa kuti quenching soft point ndi malo ofewa osasunthika pazigawozo.Choncho, amatchedwanso soft point (softspot) .Nthawi yofewa ya madzi otsekemera ndi yoopsa kwambiri kuposa ya kuzimitsa mafuta, chifukwa pamwamba pamakhala filimu ya nthunzi. kuti muchepetse liwiro lozizira. Chochitikachi chimadziwika kuti Leiden frosting phenomenon.Ngakhale kuti kuzimitsa mafuta sikukwanira kuuma, ndiko kuti, kuzimitsa kosakwanira, koma sikophweka kuchititsa kuzimitsa mfundo zofewa.Komabe, kuchepetsa kumene decarbonization kapena oxidation khungu ndi yofanana ndi kuzima mfundo zofewa.
Akuti mu maula mvula nyengo sachedwa kuzimitsa zofewa mfundo, ngati chinyezi cha quenching malo oposa 55%, ndi sachedwa kuzimitsa zofewa mfundo.
Pamwamba pazigawo zozimitsa pafupipafupi zimakhala zovuta kumeta zipsera, kapena m'mphepete mwa mpeni waku Japan, mitundu yowala imazimitsa mfundo yofewa.Microtissue ya quenching point soft point ndi martensite kuphatikiza pearlophyte woonda kwambiri (nodular flexter) wokhala ndi mtundu wowala.
2. Momwe mungapezere zofewa zozimitsa
Nthawi zambiri pali njira zitatu zopezera mfundo zofewa zozimitsidwa.Njira yoyamba ndiyo kuona kuwala kofiira pamtundu wopera: njira yachiwiri ndi yakuti njira yachitatu ndiyo kugwiritsa ntchito dzimbiri la asidi kuti mupeze mfundo yofewa yozimitsa;ndiko kuti, kuviika mbali mu 50% hydrochloric acid madzi njira (madzi onyowa) kwa dzimbiri, ngati mbali pamwamba zikuwoneka wakuda banga, wakuda ndi quenching mfundo zofewa. ~ 200C) zigawo zimachita dzimbiri pamalo olimba, ndipo zimapaka utoto pamalo osalimba.Kuzama kwa wosanjikiza wozimitsidwa kumatha kuyeza pogwiritsa ntchito njirayi.
3. Momwe mungapewere kuzimitsa kuchokera kumalo ofewa
Pofuna kupewa kuzimitsidwa kwa mfundo zofewa, musati oxidize kapena decarbonize mbali pamene Kutentha choyamba.Chachiwiri, pofuna kupewa pamwamba pa mbali Ufumuyo ndi nthunzi filimu madzi, ndi bwino kusonkhezera mokwanira quenching madzi ndi ntchito kutsitsi madzi. ozizira.Kuonjezera apo, ngati kuzimitsidwa ndi madzi amchere a 10% kungalepheretse kuzimitsa mfundo zofewa.Kuonjezera apo, kugwiritsa ntchito ufa wonyezimira pamwamba pazigawo zozimitsa ndi njira yabwino yopewera kuzimitsa zofewa. mfundo.Ufa wopukuta umazirala mofulumira kusiyana ndi zitsulo zosaphimbidwa ndipo sizizimitsa mfundo yofewa, choncho kugwiritsa ntchito ufa wopukutira mu ntchito yozimitsa mpeni wa ku Japan ndi njira yachinsinsi.Koma iyenera kutengedwa.Ngati ufa wopukuta uli wandiweyani kwambiri, kuzizira kumachedwa, sikuli kovuta.
Ufa wopukuta ndi wochepa thupi ndipo umagwiritsidwa ntchito pamwamba pa zigawo zozimitsa, ndipo pamene kuzimitsidwa, pamwamba sikukuzunguliridwa ndi filimu ya nthunzi, yomwe imakhala ming'oma yaing'ono ndikuwuka mwakhama, choncho imazizira mofulumira.
Monga wothandizira kuvala, kuwonjezera pa ufa wopukuta.Ndi phulusa ndi kaolini ndi madzi;mica wopanda dongo lofewa ndi madzi: pumice ndi dongo lofewa ndi madzi, izi zimanenedwa kuti ndi maphikidwe abwino.
Posachedwapa, madzi osungunuka amadzimadzi (polymer quenching solution) amagwiritsidwa ntchito kwambiri m'malo mwa mafuta ozizimitsa, omwe ali ndi kusungunuka kosasunthika ndipo amatha kupanga filimu pamtunda pamene akutenthedwa ndi zigawo zowonongeka.Pamene kutentha kumatsikira pafupifupi 90 ℃ (njira zina ndi 74 ℃), chigoba cha pamwamba chimasungunuka. kupaka ufa wopukutira nawo}
Komanso, ngati akupanga kuzirala ” 25000 masabata / s), nthunzi filimu angathenso bwino kuchotsedwa, kotero kuzimitsidwa mfundo zofewa angathenso kupewedwa.Ultrasonic yozizira ndi njira yatsopano yozizira.
Malingaliro a kampani Shandong Jute Steel Pipe Co.,Ltd.
Othandizira: Bambo Ji
WhatsApp: +86 18865211873
WeChat: +86 18865211873
E-mail: jutesteelpipe@gmail.com
E-mail: juteguanye@aliyun.com
Nthawi yotumiza: Mar-12-2022
