Chitsulo chosapanga dzimbiri sichimangolimbana ndi dzimbiri - chimalimbana ndi kunyengerera. Pamene nyumba ya hydraulic valve iyenera kukhala ndi bar 420 popanda kutayikira yaying'ono, pamene silinda yapampu imazungulira pa 3,600 rpm pansi pa slurry ya abrasive, kapena pamene winch shaft ya m'mphepete mwa nyanja imapirira chifunga chamchere ndi kugwedezeka kwa cyclic kwa zaka 15 - molondola. kuponyera chitsulo chosapanga dzimbiri imapereka kukhulupirika kwazitsulo ndi kukhulupirika kofunikira.
Taponya zida zopitilira 12,000 zazitsulo zosapanga dzimbiri kuyambira 2018-osati monga zopanda kanthu, koma monga magalasi ogwira ntchito okhala ndi GD&T callouts olimba kuposa ± 0.02 mm, pamwamba amatha mpaka Ra 0.8 µm, komanso kutsatiridwa kwathunthu kuchokera pakutentha mpaka lipoti lomaliza loyendera. Pakupanga kwenikweni, tawona makasitomala akukana magawo osati chifukwa cha porosity, koma chifukwa kupatuka kwa 0.05 mm mu flange flatness kunayambitsa kuphulika kwa gasket panthawi yotumiza. Ichi ndichifukwa chake kuponyera chitsulo chosapanga dzimbiri sikutanthauza kuthira chitsulo-ndi kuwongolera kinetics yolimba, kuwongolera kutsika kwa interdendritic, ndi kulumikiza kutulutsa kwambewu ndi njira zonyamula katundu asanadutse ladle yoyamba.
Chifukwa chiyani Investment Casting Imapambana pa Complex Stainless Steel Geometry
Kuponyera mchenga kumagwira nyumba zazikulu ndi zigawo zokhuthala - koma kwa mavavu olimba amipanda yopyapyala, ma doko ambiri, kapena zonyamulira masamba a turbine, kuyika ndalama kumakhala kolamulira. Dongosolo lake la zipolopolo za ceramic limagwira ntchito bwino ngati nthiti za 0.3 mm ndi kulolerana mpaka CT4 pa ISO 8062. Timakonda kuponya CF8M (ASTM A351) ndi F316L (UNS S31603) m'zigawo zokhala ndi makulidwe a khoma pansi pa 2.5 mm ndi magawo opitilira 12: 1 makina olimba - osatheka kutengera chuma.
Koma kupambana kumadalira pa zinthu zitatu zomwe sizingakambirane:
- Mapangidwe azithunzi omwe amayembekezera kutsika kwamafuta-osati kutsika kwa mzere (1.8-2.2% kwa 316), koma kupotoza kwa anisotropic kudutsa minofu ndi ma cores;
- Mbiri yowombera zipolopolo yosinthidwa kukhala alloy chemistry-makalasi okwera a chromium/nickel amafuna kuchepetsedwa pang'onopang'ono ndi kutentha kwanthawi yayitali kuti asatengere mpweya;
- Kutsanulira kutentha mkati mwa ± 15°C-Kutentha kwambiri kumayitanitsa macrosegregation; kuzizira kwambiri kumayambitsa kutsekeka kozizira kwa othamanga osakwana 4 mm mulifupi.
Makasitomala m'modzi wakumalo opangira mafuta ku North America adasintha kuchoka ku mchenga-cast F22 kupita ku CF8M yopangira ndalama pamisonkhano yamagulu. Kulephera kwawo kudatsika kuchoka pa 7.3% kufika pa 0.4% -osati chifukwa cha chitsulo chabwinoko, koma chifukwa kuponya ndalama kunathetsa zolakwika zazikulu zomwe zidasokoneza umphumphu wa malire.
Mtengo Wobisika wa "Standard" Stainless Steel Grades
CF8, CF8M, CF3, CF3M—izi sizisinthana. Tawona mainjiniya akutchula CF8 pampopi yamadzi am'nyanja, kuti tipeze dzimbiri pambuyo pa miyezi 14. Chifukwa chiyani? CF8 ili ndi ≤0.08% carbon ndipo palibe molybdenum. M'malo okhala ndi chloride, PREN yake (Pitting Resistance Equivalent Number) imakhala pa 18-20. CF3M, yokhala ndi 2.0-3.0% Mo ndi mpweya wochepa, imakankhira PREN ku 25-28-kusiyana kwakukulu.
Kusankha kwazinthu sizongoyerekeza. Imagwira ntchito:
- F304L: Zovomerezeka pamayendedwe amtundu wa chakudya-ayi ntchito ya gasi wowawasa pamwamba pa 60 ° C;
- F316L: Zochepa zama hydraulic manifolds akunyanja-koma pokhapokha ngati yankho-annealed ndi passivated post-cast;
- CA6NM (ASTM A995 Gr. 4A): Chofunikira pazitsulo zothamanga kwambiri zamadzi a m'nyanja - 4% Ni + 13% Cr + 0.05% N imapereka mphamvu ya kutopa> 720 MPa.
Timatsimikizira kutentha kulikonse ndi PMI (Positive Material Identification) ndikusunga malipoti oyesa mphero akuwonetsa zenizeni za Cr, Ni, Mo, ndi N - osati "kungokumana ndi ASTM." Chifukwa gulu lovomerezeka ku F316L limathabe kuchepa ngati nayitrogeni ndi 0.03% m'malo mwa 0.06%.
Kuchokera Kuyimba mpaka Kugwira Ntchito: Chifukwa Chake Kuphatikizika Kwamagawo Kuli Kofunikira
Kuponya chitsulo chosapanga dzimbiri sikutha pamene gawolo lazizira. Malo opangidwa ndi as-cast amakhala ndi micro-porosity, zotsalira zotsalira, ndi oxide sikelo-palibe chovomerezeka kusindikiza kapena kuzungulira kozungulira. Ndipamene kuphatikiza koyima kumakhala kotsimikizika.
Pamalo athu a Qingdao, chitsulo chilichonse chosapanga dzimbiri chimachitika:
- Kutentha mankhwala-kuthetsa annealing pa 1040-1120 ° C kutsatiridwa ndi kuzimitsa madzi, kutsimikiziridwa ndi mapu a thermocouple;
- Machining-pamalo a 5-axis CNC omwe amakhala ndi malo enieni mkati mwa 0.01 mm pa bore Ø12 mm;
- Kukweza pamwamba-electropolishing pofuna kuchepetsa Ra ndi kusinthika kosanjikiza kosanjikiza, kapena kuwomberedwa chifukwa cha kupsinjika kwapang'onopang'ono m'malo ovuta kutopa.
Galimoto ya injiniya yaku Germany OEM inkafunika nyumba za silinda za pistoni zokhazikika <0.015 mm pakati pa nkhope yoboola ndi yokwera. Kuponya mchenga kokha sikukanatha kupereka. Njira yathu yosakanizidwa - kugulitsa ndalama zomwe zimapangitsa kuti zikhale zovuta, kenaka kumalizitsa ndi kukulitsa m'njira imodzi - kudula zotsalira ndi 62% ndikuwonjezera moyo wautumiki kuchoka pa maola 8,000 mpaka 14,500.
Pamene mukufunikira kuponyera chitsulo chosapanga dzimbiri zomwe zimagwira - osati kungoyang'ana - mumafunikira anzanu omwe asintha mitundu yolimba ya ma AMS 5387 cobalt alloys, mbiri yotsimikizika yamafuta amtundu wa T800-based pump casings, ndikutsata 100% yazinthu zopangira zimawotcha ku EAF ng'anjo yosungunuka. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. amamanga luso limenelo m'chigawo chilichonse-osati monga chodandaula, koma monga ndondomeko yolembedwa, yowerengeka. Kulondola sikuwonjezedwa kumapeto. Imapangidwa mu njere zoyamba.
