Simbi isina tsvina haingorambi ngura-inodzivisa kubvumirana. Kana imba ye hydraulic valve ichifanira kubata 420 bar isina micro-leakage, apo silinda yepombi inotenderera pa3,600 rpm pasi pemvura inoputika, kana shaft yekumahombekombe inotsungirira mhute yemunyu uye cyclic torsion kwemakore 15-chaizvo chete. kukanda simbi isina tsvina inopa iyo metallurgical kutendeseka uye dimensional kutendeka kunodiwa.
Takakanda zvinopfuura zviuru gumi nezviviri zvesimbi isina tsvina kubvira 2018-kwete sezvisina kuvharwa, asi semagungano anoshanda ane GD&T callouts akasimba kupfuura ± 0.02 mm, pamusoro anopera kusvika kuRa 0.8 µm, uye kuteedzera kuzere kubva pakupisa kusvika kune yekupedzisira yekuongorora. Mukugadzirwa chaiko, takaona vatengi vachiramba zvikamu kwete zve porosity, asi nekuti kutsauka kwe 0.05 mm mu flange flatness kwakakonzera kuvhuvhuta kwegasket panguva yekutumwa kwemunda. Ndosaka kukanda simbi isina tsvina kusiri kwekudira simbi - ndeye kudzora solidification kinetics, kutonga interdendritic shrinkage, uye kuenzanisa kuyerera kwezviyo nemakwara emutoro isati yaiswa ladle yekutanga.
Nei Investment Casting Inokunda YeComplex Stainless Simbi Geometry
Kukanda jecha kunobata dzimba dzakakura uye zvikamu zvakakora-asi kune matete-walled pressure valves, multi-port manifolds, kana turbine blade carriers, kuisa mari kunotonga. Ceramic shell process yayo inobata zvimiro zvakanaka se 0.3 mm mbabvu uye kushivirira kusvika kuCT4 pa ISO 8062. Isu tinogara tichikandira CF8M (ASTM A351) neF316L (UNS S31603) muzvikamu zvine hukobvu hwemadziro pasi pe2.5 mm uye chiyero chinodarika 12: 1 mushina wakasimba wehupfumi.
Asi kubudirira kunotsamira pazvinhu zvitatu zvisingagone kutaurirana:
- Patani dhizaini inotarisira kupisa kwemafuta-kwete chete mutsara shrinkage (1.8-2.2% ye316), asi anisotropic distortion kumativi ose mafillet uye cores;
- Shell yekupfura mbiri yakarongedzwa kune alloy chemistry-yepamusoro chromium/nickel mamakisi anoda kunonoka kudonha uye kureba preheat kudzivirira kabhoni pickup;
- Kudurura tembiricha kutonga mukati ± 15°C-kunyanya kupisa kunokoka macrosegregation; kutonhora zvakanyanya kunokonzera kuvharika kwechando muvamhanyi pasi pe 4 mm yakafara.
Mumwe mutengi wenzvimbo yemafuta ekuNorth America akachinja kubva kujecha-cast F22 kuenda kukudyara-kanda CF8M yemagungano emuviri anodzipwa. Kukundikana kwavo kwakadzikira kubva pa7.3% kuenda pa0.4% - kwete nekuda kwesimbi iri nani, asi nekuti kuisa mari pakudya kwakabvisa hurema hwekuchinja hwakakanganisa kuvimbika kwemuganhu.
Mutengo Wakavanzika we "Standard" Stainless Simbi Magiredhi
CF8, CF8M, CF3, CF3M-izvi hazvichinjike. Takaona mainjiniya achitsanangura CF8 yepombi yemvura yegungwa, kungoona gomba mushure memwedzi gumi nemina. Sei? CF8 ine ≤0.08% kabhoni uye hapana molybdenum. Munzvimbo dzine chloride-rich, yayo PREN (Pitting Resistance Equivalent Number) inogara pa18-20. CF3M, ine 2.0-3.0% Mo uye yakaderera kabhoni, inosundira PREN kusvika 25-28-musiyano wakajeka.
Kusarudzwa kwezvinhu hakusi dzidziso. Iri kushanda:
- F304L: Inogamuchirwa kune vanotakura chikafu-giredhi-kwete nokuda kwevhisi yakasvibirira sevhisi pamusoro pe60 ° C;
- F316L: Zvishoma kune offshore hydraulic manifolds-asi chete kana mhinduro-yakagadziriswa uye yakapfuura post-cast;
- CA6NM (ASTM A995 Gr. 4A): Inodiwa kune yakakwirira-velocity yemvura yegungwa impellers-yayo 4% Ni + 13% Cr + 0.05% N inopa kuneta simba> 720 MPa.
Isu tinoona kupisa kwese nePMI (Positive Material Identification) uye tinochengeta mill bvunzo mishumo inoratidza chaiyo Cr, Ni, Mo, uye N zvemukati-kwete chete "kusangana neASTM." Nekuti batch yakasimbiswa kuF316L inogona kuramba ipfupi kana nitrogen iri 0.03% pachinzvimbo che0.06%.
Kubva Kukandira kuenda Kubasa: Nei Vertical Kubatanidzwa Kunokosha
Kukanda simbi isina tsvina hakuna kupera kana chikamu chatonhora. As-cast surfaces ine micro-porosity, residual stresses, uye oxide scale-hapana inogamuchirwa pakuisa chisimbiso chine simba kana kutenderera. Ndiko uko kusanganisa kwakamira kunova kwakasimba.
Panzvimbo yedu yeQingdao, kukanda kwese kwesimbi isina tsvina kunoitika:
- Kurapa kwekupisa-Solution annealing pa 1040–1120°C inoteverwa nekudzimwa kwemvura, yakasimbiswa ne thermocouple mapping;
- Machining-pa5-axis CNC nzvimbo dzinobata nzvimbo yechokwadi mukati me0.01 mm paØ12 mm bores;
- Kukwidziridzwa kwepamusoro-electropolishing yeRa kuderedza uye passive layer regeneration, kana kupfurwa kudongorera kwekumanikidza kushushikana munzvimbo dzakanyanya kuneta.
Motokari yeGerman engineering OEM yaida piston pombi silinda dzimba dzine concentricity <0.015 mm pakati pekuboora nekukwira kumeso. Kukandwa kwejecha chete hakuna kukwanisa kuzviburitsa. Nzira yedu yakasanganiswa-kudyara kunokanda chimiro chakakasharara, kozopedza-kufinha uye kukudza mune imwe setup-cheka zvimedu ne62% uye nekuwedzera hupenyu hwesevhisi kubva pa8,000 kusvika 14,500 maawa ekushanda.
Paunenge uchida kukanda simbi isina tsvina iyo inoita - kwete kungopfuura kuongororwa - iwe unoda vadyidzani vakagadzirisa solidification mamodheru eAMS 5387 cobalt alloys, akasimbisa maprofile eT800-based pombi casings, uye akateedzera 100% yezvakasvibirira zvinopisa zvichidzokera kuEAF nyunguduka choto. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. inovaka kugona ikoko muchikamu chega chega-kwete sechikumbiro, asi sechinyorwa, chinotarisika kutevedzana. Precision haina kuwedzerwa kumagumo. Yakagadzirwa mumutsara wekutanga.
