Thaum cov neeg feem coob hnov 'stainless steel peev casting', lawv pom qhov tsis zoo, ci ntsa iab ncaj qha tawm ntawm daim ntawv qhia. Qhov tseeb, kev sib tsoo txhua hnub ntawm kev ua haujlwm, yog qhov messier thiab nthuav ntau dua. Nws tsis yog tsuas yog melting hlau thiab pouring rau hauv ib tug zoo nkauj pwm; nws yog ib qho kev sib tham tas mus li ntawm cov khoom coj tus cwj pwm, geometry, thiab tus nqi, qhov twg 0.5mm phab ntsa thickness txiav txim siab tuaj yeem ua lossis tawg ib qhov project. Kuv tau pom ntau tus qauv tsim los rau hauv uas yog zoo meej rau machining tab sis npau suav phem rau casting, thiab qhov ntawd yog qhov kev sib tham tiag tiag pib.
Lub Plhaub Game: Nws yog tag nrho hauv Pwm
Lub plhaub yog txhua yam. Qhov ntawd yog thawj qhov koj kawm. Peb tab tom tham txog ceramic plhaub pwm ua nyob ib ncig ntawm cov qauv siv quav ciab. Tus naj npawb ntawm cov tsho loj, slurry viscosity, stucco xuab zeb grit - txhua kauj ruam yog qhov sib txawv. Tau txais nws tsis ncaj ncees lawm, thiab koj yuav pom qhov tsis xws li hlau nkag mus, qhov twg cov hlau nkag mus rau hauv lub plhaub, tawm hauv qhov ntxhib, fused nto uas yog npau suav phem los ntxuav. Kuv nco ntsoov ib pawg ntawm 316L valve lub cev peb tau khiav; thawj cov ntawv tuaj tawm nrog kev ntxhib los mos ntawm cov kab lus sab hauv. Tus neeg ua txhaum? Cov txheej txheem slurry yog nyias dhau, thiab cov xuab zeb zoo nkauj tsis tsim kom muaj qhov thaiv. Peb kho lub sij hawm poob thiab hloov mus rau coarser zircon xuab zeb rau thawj lub tsho tiv no. Teeb meem daws tau, tab sis nws raug nqi peb ib lub lim tiam.
Qhov no yog qhov uas tus foundry qhov kev paub qhia. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog rau lawv lub xyoo caum nyob rau hauv qhov kev ua si, muaj cov txheej txheem no hu rau hauv. Nws tsis yog khawv koob; nws yog cov ntaub ntawv ntawm kev ua tsis tiav thiab kho tau tsim dua 30 xyoo. Koj tsis tuaj yeem maj lub sijhawm ziab ntawm cov tsho tiv no, txawm tias lub sijhawm tsim khoom hais li cas. Cov av noo dhau los ua koj tus yeeb ncuab lossis koj tus phooj ywg.
Thiab wax tsis yog ciab xwb. Kev txhaj tshuaj tsis haum rau thawj tus qauv - siab, kub - cuam tshuam rau nws qhov ruaj khov. Ib qho me ntsis warped wax qauv txhais ncaj qha rau hauv lub plhaub ceramic, thiab tom qab ntawd mus rau hauv ib qho cam khwb cia uas tawm ntawm spec. Peb siv sij hawm ntau npaum li qhov tsim nyog cov txheej txheem wax thaum peb ua cov hlau ncuav. Nws yog lub unglamorous, lub hauv paus tseem ceeb.
Khoom siv tsis yog ib daim ntawv tshwj xeeb xwb
Kev qhia txog CF8M lossis 17-4 PH yog qhov pib rab yaj phom xwb. Kev xyaum yaj yog qhov chaw metallurgy tshwm sim. Rau kev nqis peev casting, koj tab tom cuam tshuam nrog cov cua sov me me, yog li kev tswj hwm yog qhov tseem ceeb. Kev xyaum deoxidation nrog txhuas lossis silicon? Nws hloov cov fluidity thiab cov ntsiab lus suav nrog zaum kawg. Rau qhov muaj qhov siab, qhov no yog txoj sia lossis kev tuag.
Siv 17-4 PH stainless hlau. Lub nto moo nag lossis daus-hardening qib. Qhov peev casting kom zoo dua yog koj tuaj yeem ua tiav zoo li-cam khwb cia nto tiav thiab cov duab nyuaj. Tab sis H900 mob kev kho cua sov? Yog hais tias cov tshuaj annealing tsis ua tiav zoo ib yam, koj yuav tau txais cov khoom tsis sib xws. Kuv twb pom tensile xeem daim coupons los ntawm tib casting batch qhia ib tug 50 ksi kis nyob rau hauv yield zog vim lub cub tawg load tsis zoo. Qhov seem ntsia zoo tag nrho, tab sis nws yuav ua tsis tiav hauv kev pabcuam.
Nov yog lwm thaj chaw uas koom tes nrog tus kws tshaj lij them nyiaj. Ib tug foundry uas tseem ua hauv tsev CNC machining, zoo li QSY, muaj qhov zoo dua. Lawv to taub yuav ua li cas lub casting lub microstructure thiab muaj peev xwm micro-porosity yuav cuam tshuam nrog lub cuab yeej txiav. Lawv tuaj yeem kho cov kev kho cua sov kom ua kom zoo dua qub yam tsis muaj kev cuam tshuam cov khoom kawg, ib yam dab tsi ib leeg casting tsev yuav tsis xav txog. Nws yog ib tug holistic saib ntawm lub feem ntau lifecycle.
Geometry: Kev ywj pheej thiab lub ntxiab
Yog, peev casting muab rau koj zoo kawg geometric kev ywj pheej. Sab hauv kab, undercuts, complex curves - txhua yam ua tau. Tab sis 'ua tau' tsis txhais hais tias 'yooj yim' lossis 'tus nqi siv tau'. Txoj cai ntawm tus ntiv tes xoo yog uniform phab ntsa thickness. Tab sis nyob rau hauv lub ntiaj teb no tiag tiag, qhov chaw yuav tsum tau tav, tus thawj coj, thiab mounting pads. Qhov kev sib tw yog tswj xyuas qhov sib txawv ntawm qhov sib txawv ntawm thermal mass.
Ib qho tsis ua haujlwm classic yog shrinkage porosity hauv qhov chaw kub. Xav txog lub tsev nyob nrog lub flange tuab hloov mus rau lub cev nyias. Cov seem nyias ua ntej, cais cov tuab flange, uas tom qab ntawd shrinks raws li nws txias tsis muaj cov kua hlau los pub nws. Qhov tshwm sim? Ib qho chaw spongy, tsis muaj zog nyob qhov twg koj xav tau lub zog. Qhov kho? Kev siv tswv yim ua kom txias (hlau ntxig rau hauv lub plhaub kom tshem tawm cov cua sov) los yog siv quav ciab los tsim cov khoom loj ntxiv uas tau muab tshem tawm tom qab. Nws yog ib tug puzzle.
Kuv ua hauj lwm ntawm lub twj tso kua mis impeller ib zaug, tag nrho nyias, aerofoil-puab hniav. Qhov teeb meem tsis yog cov hniav; nws yog qhov chaw nruab nrab. Nws yog loj heev txheeb ze rau cov hniav. Peb tau ua tiav ntxiv cov tub ntxhais ceramic rau lub hub kom nws hollow, txo cov thermal loj thiab tsim kom muaj qhov sib txawv ntawm qhov txias txias. Cov qauv kev hloov pauv tau tsav los ntawm cov txheej txheem casting, tsis yog lwm txoj hauv kev. Qhov ntawd ua tiav peev casting.
Txoj kab tiav tsis yog ib kauj ruam xwb
Knock-off, txiav-tawm, sib tsoo, txhaj tshuaj blasting, kho cua sov, pickling ... cov kauj ruam tom qab-casting yog qhov twg tus nqi thiab zoo yuav diverge dramatically. Txhua leej txhua tus xav tau ib qho npaj txhij-rau-nruab, tab sis qhov npaj tau muaj txheej.
Kev txiav tawm yog kev kos duab. Tshem tawm lub rooj vag system (cov channel uas pub hlau rau hauv ib feem) yam tsis muaj kev puas tsuaj rau cov khoom. Kev siv lub log abrasive tsim kom muaj cua sov, uas tuaj yeem cuam tshuam cov metallurgy nyob rau hauv thaj chaw uas muaj cua sov, tshwj xeeb tshaj yog rau cov qib hardened. Ntau qhov chaw sophisticated siv band saws lossis txawm CNC machining tshem tawm cov rooj vag precisely. Lub rooj vag seem yuav tsum yog av yaug. Qhov no yog phau ntawv, kev ua haujlwm txawj. Qhov zoo ntawm qhov kev ua tiav no ncaj qha cuam tshuam rau lub neej qaug zog yog tias lub rooj vag nyob hauv thaj chaw muaj kev ntxhov siab.
Pickling, cov kua qaub da dej kom tshem tawm cov nplai thiab kho cov txheej txheem chromium oxide passive rau ntawm stainless hlau nto, yog lwm kauj ruam tseem ceeb. Lub sij hawm, qhov kub thiab txias, acid concentration - txhua yam yuav tsum tau tswj. Tshaj-pickle, thiab koj tau txais ib qho etched, pitted nto. Hauv qab-pickle, thiab koj tawm embedded nplai uas tuaj yeem pib corrosion. Nws yog ib qho tshuaj ntsuas ntsuas uas tsis tau txais kev saib xyuas txaus kom txog thaum muaj ib yam dab tsi tawm los tsis muaj xim lossis xeb-zoo li ncaj nraim los ntawm da dej.
Yog vim li cas tus khub txoj cai tsis yog ib tug neeg muab khoom xwb
Qhov no tsis yog khoom lag luam. Koj tsis tas yuav cov khoom lag luam tawm ntawm lub txee. Koj tab tom yuav cov txheej txheem muaj peev xwm thiab qhov tob ntawm kev daws teeb meem. Thaum koj saib lub tuam txhab keeb kwm yav dhau los, zoo li pom qhov ntawd QSY tau ua hauj lwm rau ntau tshaj 30 xyoo nyob rau hauv casting thiab machining, nws qhia rau koj hais tias lawv tau navigated no trade-offs rau tiam ntawm engineers. Tej zaum lawv tau txais kev cawmdim los ntawm kev tawm tswv yim me ntsis kev hloov pauv lub kaum sab xis lossis qib sib txawv alloy uas ua rau zoo dua nrog cov khoom zoo sib xws.
Qhov txiaj ntsig loj tshaj qhov chaw tsim khoom zoo muab yog kev cuam tshuam kev tsim qauv thaum ntxov. Ua ntej tus qauv CAD tiav, ua ntej lub cuab yeej txiav. Qhov ntawd yog thaum lawv tuaj yeem hais tias, Peb tuaj yeem nrum qhov ntawd, tab sis yog tias koj tso cai rau peb lub vojvoog ntawm qhov kev sib tshuam me ntsis ntxiv, peb lav tsis muaj qhov shrinkage, lossis xav txog cov nickel-based alloy ntawm no es tsis txhob; nws yuav tiv taus qhov corrosive ib puag ncig zoo dua thiab peb muaj daim ntawv qhia plhaub pov thawj rau nws. Qhov kev sib koom tes no hloov ib daim duab rau hauv cov khoom tsim tau, txhim khu kev qha.
Thaum kawg, ua tiav stainless hlau peev casting yog hais txog embracing tus txheej txheem cov kev txwv los qhib nws lub peev xwm. Nws yog kev sib tham ntawm lub hom phiaj tsim thiab lub cev muaj tiag. Qhov ci ntsa iab, qhov nyuaj ntawm tus kws ua haujlwm lub rooj yog qhov tshwm sim ntawm ib puas me me, qhov kev txiav txim siab raug-thiab ob peb qhov kev ua yuam kev-ua hauv qhov chaw tsim khoom, ntev ua ntej cov hlau puas tau nchuav. Qhov ntawd yog qhov koj tab tom nqis peev tiag tiag.
