Kana vanhu vazhinji vakanzwa 'ductile iron sand casting', vanofananidzira nzira yakatwasuka, ingangoita yekuchikoro chekare: nyungudusa simbi, woidira mujecha, pwanya, uye wapedza. Ndiko kusanzwisisa kukuru. Chokwadi ndechekugara kutaurirana pakati pechemistry, fizikisi, uye economics. Iyo 'ductile' chikamu-kuwana iyo spheroidal graphite chimiro-ichi chiitiko chepamusoro-waya chinotanga nguva refu simbi isati yasvika paladle. Ndakaona mapurojekiti akawandisa achigumburwa nekubata iyo jecha system sechigadziko chisingaiti pane kuti atore chikamu mukuperera kwechikamu chekupedzisira.
Nheyo Ndiyo Zvose: Jecha Harisi Jecha Rake
Iwe unogona kuve nekunyungudika kwakakwana, nodularization yakakwana, asi kana jecha rako rakadzimwa, wasara. Hazvisi zvekushandisa chero silica jecha. Iyo AFS zviyo zvehunyoro nhamba, ivhu remukati (bentonite), iyo mwando mwero - idzi hadzisi nhamba dziri papepa. Ivo vanoraira kugona kwe mold kuburitsa magasi, kushingirira kutyisa kwekutyisa kwe1400 ° C+ iron, uye inopa kupera kwepamusoro kunoderedza nguva yekuchenesa. Takadzidza izvi nenzira yakaoma pane batch yemiviri yevharuvhu makore kumashure. Jecha rakanga rakanyanya kunaka uye rakarongedzwa zvakanyanya. Mhedzisiro yacho yanga isiri hurema hunooneka senge buri, asi network ye micro-inotonhora inovhara pane inomanikidza-inotakura nzvimbo yaingoonekwa panguva ye hydro-test. Kurasikirwa zvachose. Ndopaunorega kuona jecha setsvina wotanga kuona sechinhu chakanyatsojeka.
Apa ndipo apo ruzivo kubva kune yakavambwa seQSY (Qingdao Qiangsenyuan Technology Co., Ltd.) inoratidza kukosha kwayo. Kumhanyisa dhizaini kweanopfuura makore makumi matatu, iwe unokudziridza kunzwa kwejecha. Iwe unoziva kuti hunyoro pazuva rekunaya muQingdao hucharasa sei hunyoro hwezvinangwa zvako, kana kuti kushandisazve jecha kakawanda pasina kugadzirisa kwakaringana kunobira ivhu revhu. Kushanda kwavo kwenguva refu munzira dzakasiyana dzekukandira kunoreva kuti vanonzwisisa kuti kutonga kwejecha kwesimbi ye ductile hakuna kufanana neyegrey iron - kutonhora kwesimba kwakasiyana, simbi inoita zvakasiyana.
Iyo gating system dhizaini yakadururwa mujecha iroro ndechimwe chinhu chakakosha, chinowanzo tarisirwa pasi, chidimbu. Ne ductile iron, uri kubata nesimbi ine yakasarudzika pasty zone panguva yekusimba. Iwe unofanirwa kudyisa iyo shrinkage zvinobudirira, asi masuwo uye anosimuka anofanira kugadzirwa kuderedza kusagadzikana. Turbulent flow inosimudzira kuumbwa kwemarara-magnesium silicate inclusions iyo inoparadza machinability uye kuneta simba. Ndinogara ndichipedza nguva isina kuenzana pakugadzira gedhi; zvakachipa kugadzirisa padhirowa pane kurongedza pachivanze chizere nemakanda akatsemuka.
Iyo Magnesium Dhanzi: Kuwana Chokwadi Ductility
Uyu ndiwo musimboti wenzira. Kutora base iron ine yakanyatsodzorwa sarufa uye oxygen mazinga uye kubaya iyo chaiyo pfuti yemagnesium. Zvishoma, unowana flake graphite, kurasikirwa ductility. Zvakawanda, unowana kunaya kwecarbide, zvichiita kuti chikamu chacho chiite brittle uye chisingaenzaniswi. Iyo nzira yakakosha-tundish chivharo, sandwich, kuyerera-kupfuura. Chimwe nechimwe chine goho rayo uye kuenderana. Ndinosarudza sandwich nzira yezvikamu zvinorema; inopa maitiro anofanotaurwa, anononoka kuita. Hausi kungowedzera chinhu; Uri kutonga zvine chisimba exothermic reaction inoshandura kusimba kwese kwesimbi.
Post-inoculation inhanho yekutevera yausingakwanise kusvetuka. Iyo magnesium kurapwa inopera. Kana iwe ukamirira kwenguva yakareba kuti udire, magirafu e graphite anotanga kupera. Kuwedzera inoculant inononoka senge ferrosilicon pamberi chaipo pekudira inogadzira nzvimbo nyowani dzekuisa nucleation, kuve nechokwadi chepamusoro chekuverenga nodule uye yunifomu, yakanaka matrix. Ndakatsvaga ma mechanical properties zvichienderana nenguva iri pakati pekurapwa nekudurura. Kudonhedza mushure meimwe hwindo yakaoma. Inomanikidza rhythm pauriri hwechitoro inoratidzika kunge ine mhirizhonga asi ichiri bhareti yakanyatsorongedzwa.
Kutaura nezve zvivakwa, kukwezva kwe ductile iron jecha kukanda ndiyo range yaunogona kuwana. Unogona kunanga EN-GJS-400-18 yekurebesa kwepamusoro, kana kusundira kuGJS-700-2 kuti uwane simba. Asi iwe hauwane izvozvo nekungochinja resipi muchoto. Iko kusanganiswa kwekemesitiri, chiyero chekutonhora chinotemerwa nejecha mold (zvakakora zvikamu zvinotonhorera zvishoma, zvinokanganisa saizi yemanodule uye matrix), uye kazhinji, kunotevera kurapwa kwekupisa. Kubatanidza kuisa ferritize, kudzima uye kudzikisira pearlitic kana martensitic chimiro - kukanda jecha ingori nhanho yekutanga murwendo rurefu kuenda kune yekupedzisira spec.
Painokodzera nePaisingaite
Ductile iron kukanda jecha haisiriyo mhinduro kuchikamu chese. Zvekuomarara-zvakanyanya, zvitete-madziro zvimiro zvine kupenga kwedimensional kushivirira, kuisa mari kana kuumba goko zvingave nani. Asi pane zvazvinoita nemazvo, hazvikundike pamutengo wepakati nepakati zvikamu. Funga dzimba dzepombi, inorema-basa gearbox makesi, hombe hydraulic manifolds, kana muchina mabhesi emidziyo. Iyo sheer saizi kugona uye yakaderera mutengo wekushandisa kune jecha mold (kunyanya kune imwe-off kana yakaderera mavhoriyamu) inoita kuti ive yekuenda-ku. Kambani yakaita seQSY, iyo inopa zvese ganda mold uye jecha kukanda, iri munzvimbo yakanaka yekupa zano pane izvi. Vanogona kutarisa kudhirowa uye kutaura chokwadi, Kune iyi chaiyo bracket, kukanda jecha kwakawandisa, ngatishandisei goko mold, kana Iyi turbine imba inoda thermal mass control chete yakanyatsogadzirwa jecha mold inogona kupa.
Iyo machining allowance chinhu chakakosha chehupfumi chinhu. Nzvimbo dzakakandwa nejecha dzakaoma. Iwe unofanirwa kusiya yakawanda stock kuti CNC michina kuchenesa. Ndiko kutambisa simbi nekugadzira nguva. Iyo yakanyatsogadzirwa jecha process ine zirconia kana chromite yakatarisana nejecha munzvimbo dzakakosha inogona kuvandudza kupedzwa kwepamusoro zvakanyanya, kuderedza iyo mvumo. Iko kuverengera kwemutengo-benefit. Kune isiri-yakakosha yemukati, mvumo ye3-5mm yakanaka. Kune chigaro chinotakura, iwe unoida yakasimba sezvinobvira, pamwe 1.5-2mm, iyo inoda yakanakisa mold mhando.
Musoro wenyika chaiwo? Dimensional musiyano. Iyo yejecha mold inogona kukanganisa panguva yekudira, kana iyo pateni inopfeka. Kune chikamu chakaoma, kubata kushivirira kwakasimba pane batch hombe kunonetsa. Iwe kazhinji unofanirwa kuvaka mukubhadhara mune iyo pateni-hunyanzvi pachayo. Isu takambove nedambudziko rinodzokororwa neiyo bore spacing pane compressor furemu. Iyo pateni yaive yakakwana, asi makanda aive akadzimwa nehafu yemamilimita. Mupari wemhosva? Iyo jecha compaction yakatenderedza core prints yanga isiri yunifomu, ichibvumira iyo inorema cores kuti ifambe zvishoma panguva yekudira. Iyo gadziriso yaive nyore kugadziridza kweiyo core print geometry kuti ivhare munzvimbo zvirinani. Rakareruka mukutarisa, vhiki yebasa remutikitivha panguva iyoyo.
Iko Kubatanidzwa: Kubva Kukandira kusvika Yakapedzwa Chikamu
Ichi ndicho chokwadi chemazuva ano. Kashoma kuita a ductile iron jecha kukanda ship as-cast. Inoda machining. Kuve nekukandira uye machining pasi pedenga remba, sezvinoita QSY neCNC machining division yavo, inobvisa gomo rezvinhu uye kusawirirana kwemhando. Vagadziri vemichina nevagadziri vanogona kutaura. Kana machinists vachigara vachipwanya maturusi pane imwe batch, vanogona kufamba vachidzokera kune yekutanga uye voti, Kuomarara hakuenderane, kana Pane ganda rekutonhora pano. Iyo foundry inogona kugadzirisa inoculant kana tembiricha yekudurura.
Zvekushandisa zvine basa zvakare. Nepo standard ductile iron (senge 450-10) iri bhiza rekushanda, dzimwe nguva unoda bainitic ductile iron yekusapfeka, kana silicon-solution-yakasimba imwe yebasa rekupisa. Maitiro ejecha anochinjika, asi gating uye kusimuka kunofanirwa kudzokororwa kune aya alloys ane akasiyana shrinkage maitiro. Kududzwa kweQSY kwekushanda nemaaloyi akakosha senge nickel-based ari kutaura-inoratidza kugona kubata kunyungudika kwakawanda kungave kuri kudiwa pakuora kana kusapisa kupisa kwezvikamu zvesimbi.
Pakupedzisira, kubudirira ductile iron jecha kukanda ndezvekuona cheni yese. Haisi nhevedzano yematanho akasarudzika asi loop. Iyo machining mhinduro inozivisa maitiro ekukanda. Hunhu hwekukanda hunoraira goho rekugadzira. Iyo gritty, maoko-on maitiro apo dzidziso inosangana nechokwadi chekupisa, chine ruzha chekuvamba pasi. Kunaka kwayo kuri mukugadzira chinhu chakasimba, chakavimbika chesimbi chinoumba musana wakavanda wemichina yakawanda, tichishandisa imwe yenzira dzekare uye dzinochinjika dzatinadzo. Iwe unoremekedza maitiro, uye inobereka zvikamu zvinogara kwemakumi emakore.
