Ⅰ-Kodi Cr12MoV Cold Working Die Steel ndi chiyani?
Chitsulo chozizira cha Cr12MoV chomwe chimapangidwa ndi zhongao chili m'gulu la chitsulo cholimba kwambiri chomwe sichimawonongeka, chomwe chimadziwika ndi kukana kwambiri kuwonongeka, kuuma, kusinthasintha pang'ono, kukhazikika kwa kutentha, mphamvu yopindika kwambiri, ndi zinthu zina. Ndi chachiwiri kwa chitsulo chothamanga kwambiri ndipo ndi chinthu chofunikira kwambiri poponda, kuzizira, ndi zinthu zina. Chitsulo chozizira cha Cr12MoV ndi chitsulo cha carbon molybdenum ledeburite chokhala ndi kaboni wochepa kuposa chitsulo cha Crl2. Molybdenum ndi vanadium zimawonjezedwa kuti ziwongolere magwiridwe antchito otentha, kulimba kwa mphamvu komanso kugawa kwa carbide kwa chitsulocho. Chitsulo chozizira cha Cr12MoV chili ndi kaboni wochepa kuposa chitsulo chozizira cha Cr12. Kuwonjezeredwa kwa zinthu zatsopano za alloy kumathandizira kuti carbide isagwirizane. Kuphatikiza apo, molybdenum ndi molybdenum zimatha kuchepetsa kulekanitsidwa kwa carbide ndikuwonjezera kuuma. Vanadium ndi vanadium zimatha kuyeretsa tirigu ndikuwonjezera kulimba, Chifukwa chake, chitsulo cha nkhungu cha Zhongao's Cr12MoV chili ndi kulimba kwambiri, chokhala ndi gawo lopingasa pansi pa 400mm chomwe chingazimitsidwe kwathunthu, ndipo chimathabe kukhalabe ndi kulimba bwino komanso kukana kuvala pa 300-400 ℃. Kupatula apo, chitsulo cha nkhungu cha Zhongao's Cr12MoV chili ndi kulimba bwino kuposa zida zina zamtundu womwewo pamsika wamba, ndipo kuthekera kosintha voliyumu panthawi yozimitsira kumachepa kwambiri. Chifukwa chake, kukana kwake kuvala kwambiri komanso mawonekedwe ake abwino amakina zimapangitsa chitsulo cha nkhungu cha Jinbaicheng's Cr12MoV kukhala choyenera kwambiri popanga nkhungu zosiyanasiyana zokhala ndi gawo lalikulu, mawonekedwe ovuta, komanso kupirira kugunda kwakukulu, komanso zida zosiyanasiyana zozizira pansi pa mikhalidwe yogwira ntchito yovuta, monga kuboola ma dies, kudula ma dies, kugwedeza ma dies, etc. Chitsulo chachitsulo chozama chojambula die, chozungulira chozungulira, zida zokhazikika ndi zida zoyezera, ulusi wozungulira die, ndi zina zotero.
Ⅱ-Chitsogozo Chogwiritsira Ntchito Cr12MoV Cold Working Die Steel
① Cr12MoV ingagwiritsidwe ntchito kupanga mawonekedwe ovuta a zopingasa, zopingasa, ndi zoyikapo zobowola nkhungu zokhala ndi makulidwe azinthu>3mm. Ndikofunikira kukhala ndi kuuma kwa 58~62HRC popanga nkhungu zopingasa ndi 60~64HRC popanga nkhungu zopingasa.
② Kuti apange nkhungu zopindika ndi zopingaka zomwe zimafuna kulimba kwambiri, ndi bwino kukhala ndi kuuma kwa 60 ~ 62HRC popanga nkhungu ndi 62 ~ 64HRC popanga nkhungu zopingaka.
③ Kuti apange nkhungu zopindika zosatha mu nkhungu zozama, ndi bwino kukhala ndi kuuma kwa 62 ~ 64HRC.
④ Amagwiritsidwa ntchito popanga zinyalala zozungulira, zinyalala zopingasa, ndi zoyikapo zoyikapo zomwe zimafuna kulimba kwambiri komanso mawonekedwe ovuta mu zinyalala zopindika. Ndikofunikira kukhala ndi kuuma kwa 60-64HRC popanga zinyalala zopingasa, ndi 60-64HRC popanga zinyalala zopingasa.
⑤ Popanga ma dies ndi ma dies ozizira opangidwa ndi aluminiyamu, ndi bwino kukhala ndi kuuma kwa 60-62HRC popanga ma dies, ndi 62-64HRC popanga ma dies.
⑥ Ndikofunikira kugwiritsa ntchito kuuma kwa 62 ~ 64HRC pa nkhungu zozungulira ndi zopingasa zomwe zimagwiritsidwa ntchito popanga nkhungu zozizira za mkuwa.
⑦ Zipatso zozungulira ndi zopingasa zomwe zimagwiritsidwa ntchito popanga zipatso zozizira zachitsulo zimalimbikitsidwa kuti zikhale zolimba 62 ~ 64HRC.
⑧ Ma plate achitsulo a spring okhala ndi gawo lolemera la 0.65% ~ 0.80% omwe amagwiritsidwa ntchito popanga kaboni ali ndi kuuma kwa 37 ~ 42HRC, zomwe zimapangitsa kuti moyo ukhale wa nthawi yokwana ma cycle 150000.
⑨ Mapepala achitsulo a spring okhala ndi gawo lolemera la 0.65% mpaka 0.80% omwe amagwiritsidwa ntchito popanga kaboni ali ndi kuuma kwa 37-42HRC, ndipo ndi chithandizo chowonjezera cha nitriding, nthawi yawo yogwira ntchito imatha kufika nthawi 400000.
Ⅲ-Kukonza Cr12MoV Cold Working Die Steel:
Mafotokozedwe a kufewetsa nkhungu yozizira: Tetezani ndikutenthetsa nkhunguyo ndi zipilala zachitsulo pa kutentha kwa 760-780 ℃ kwa maola 10, ndi kuzizira kwa uvuni ndi kuuma kwa 196HBW. Kupanga kuzizira kozizira kumatha kuchitika bwino.
Mafotokozedwe a annealing wamba wa isothermal spheroidizing: 850-870 ℃ × maola 3-4, kuziziritsidwa mu uvuni mpaka 740-760 ℃ × maola 4-5 a isothermal treatment, ndi kuuma kozizira kwa mpweya ≤ 241HBW, kalasi ya eutectic carbide ≤ 3, kutentha kwabwino kwambiri kwa isothermal 740-76o ℃, ndi nthawi ≥ maola 4-5.
Mafotokozedwe a spheroidizing annealing: (860 ± 10) ℃ × maola 2-4, kuzizira kwa ng'anjo pamlingo wozizira wa 30 ℃/ola, (740 ± 10) ° C x maola 4-6, kuzizira pang'onopang'ono mpaka 500-600 ℃ ndi ng'anjo, kuzizira kwa mpweya pambuyo potulutsa, kuuma 207-255HBW.
Mafotokozedwe azinthu zonse zokhudzana ndi kuzimitsa ndi kutenthetsa: kutentha kwa kuzimitsa 1000-1050 ℃, kuzimitsa mafuta kapena kuzimitsa, kuuma 260HRC, kutentha kwa kuzimitsa 160-180, nthawi yozimitsa maola awiri, kapena kutentha kwa kuzimitsa 325-375 ° C, kuzimitsa kawiri-katatu.
Kutentha kotsika kozimitsa ndi kotsika kobwerera: 950 ℃ -1040 ℃, kutentha kozimitsa kuli pafupifupi 200 ℃, kutentha kwachiwiri.
Kutentha kozimitsa kwambiri komanso kobweza kwambiri: 1050-1100 ℃, kutentha kozimitsa kuli pafupifupi 520 ℃, kutentha kwachiwiri. Njira yachiwiri yolimbitsira yomwe imagwiritsidwa ntchito pozimitsa kwambiri komanso kubwezeretsanso kwambiri imawonjezera kuuma, koma mbewuzo zimakula.
Chithandizo cha Cryogenic: Chitsulo cha Cr12MoV chimalandira chithandizo cha cryogenic, chomwe chingayambitse ma carbide osalala kwambiri ochokera ku martensite yozimitsidwa, kenako ma carbide osalala awa amatha kusinthidwa kukhala ma carbide pambuyo pa kutentha kotsika kwa 200 ℃. Martensite yopanda chithandizo cha cryogenic imangoyambitsa carbide yochepa m'malo ena am'deralo pambuyo pa moto wochepa wozungulira kutentha.
Zhongao imagwiritsa ntchito njira yochepetsera kutentha kwa mankhwala, yomwe imasunga kuuma kwakukulu ndi kukana kuwonongeka kwa chitsulo cha Cr12MoV. Zigawo zitatu zomwe zimagwiritsidwa ntchito kwambiri pochepetsera kutentha kwa mankhwala, zomwe ndi ion nitriding, gas nitrocarburizing, ndi salt bath sulfur cyanide co nitriding, zimakhala ndi mphamvu yolimba komanso yolimba, ndipo salt bath sulfur cyanide co nitriding ndiye yabwino kwambiri.
Moyo wa ntchito ya die yojambulira ziwiya zachitsulo chosapanga dzimbiri za zhongao za Cr12MoV, pambuyo pa chithandizo cha nitrocarburization ya mpweya, umafika zidutswa zoposa 30000, zomwe ndi zazitali kuposa nthawi 10 kuposa za nkhungu zofanana zomwe zimachiritsidwa ndi kuzima ndi kutentha kwachikhalidwe.
Nthawi yotumizira: Meyi-23-2024