Thaum cov neeg feem coob xav txog cov hmoov hlau metallurgy (PM), lawv dhia ncaj nraim mus nias thiab sintering. Qhov tseeb hmoov ntau lawm feem ntau tau kho raws li cov khoom lag luam, qee yam koj nyuam qhuav yuav hauv. Qhov ntawd yog kev saib xyuas kim heev. Cov yam ntxwv ntawm cov hmoov-nws morphology, particle loj tis, flowability, thiab pom meej ntom-yog kaw nyob rau hauv txoj cai ntawm no. Koj tsis tuaj yeem nias lossis sinter koj txoj kev tawm ntawm cov hmoov phem. Nws txhais txhua yam uas los tom qab.
Cov txheej txheem tseem ceeb thiab qhov tseeb ntawm kev xaiv
Koj tau txais txoj hauv kev tseem ceeb: atomization rau hlau, txo tshuaj lom neeg rau tej yam xws li tungsten, thiab kev siv tshuab xws li milling. Dej atomization yog ua haujlwm rau ntau cov hmoov ferrous-nqi-zoo, muab rau koj cov tsis zoo, me ntsis oxidized hais tias compact zoo. Tab sis yog tias koj xav tau cov hmoov kheej kheej rau kev ua haujlwm siab xws li kev tsim khoom ntxiv lossis kev txhaj tshuaj hlau (MIM), roj atomization yog qhov kev ua si tiag tiag hauv nroog. Cov roj inert, feem ntau yog argon lossis nitrogen, rhuav tshem cov dej ntws mus rau hauv qhov ze-zoo meej. Tus nqi dhia yog qhov tseem ceeb, tab sis yog qhov ua tau zoo.
Ntawm no yog cov tswv yim snag peb tau khiav mus rau hauv stainless hlau 316L batch rau MIM. Tus spec hu rau D90 nyob rau hauv 22 microns. Cov roj atomized hmoov rov qab los saib zoo meej hauv qab SEM, zoo nkauj spheres. Tab sis qhov kev soj ntsuam sieve tau pom cov rog rog ntawm kev nplua - cov khoom qis dua 10 microns. Qhov ntawd yog npau suav phem rau kev debinding; Nws hloov lub capillary ntws, tuaj yeem ua rau blistering. Tus neeg muag khoom tau tweaked cov roj siab kom ntaus cov txiaj ntsig high-end, inadvertently tsim kev nplua ntau dua. Nws tsis yog tawm ntawm spec, tab sis nws yuav luag ruined ib tug ntau lawm khiav. Nws tau qhia kuv ib txwm thov kom tag nrho PSD nkhaus, tsis yog D10, D50, D90 cov ntsiab lus.
Qhov no yog qhov kev koom tes ntev nrog cov foundries thiab cov kws tshaj lij cov khoom tseem ceeb. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog rau lawv cov xyoo caum hauv casting thiab alloys, nkag siab qhov no los ntawm lwm sab. Lawv tsis yog cov neeg tsim cov hmoov, tab sis lawv qhov kev paub tob txog kev coj tus cwj pwm-tshwj xeeb yog cov nickel-based lossis cobalt-based superalloys-qhia qhov lawv xav tau los ntawm lawv cov neeg muab hmoov rau cov txheej txheem tom ntej xws li peev casting ntawm ze-net-puab qhov chaw. Cov hmoov purity thiab sib xws ncaj qha cuam tshuam rau lawv lub plhaub pwm casting tshwm sim.
Dhau ntawm Daim Ntawv Teev Npe: Kev tuav thiab zais qhov hloov pauv
Daim ntawv pov thawj ntawm kev tsom xam yog qhov pib, tsis yog tag nrho zaj dab neeg. Apparent density and flow rate (measured by a Hall flowmeter) are critical for die filling in automatic presses. Cov hmoov muaj peev xwm muaj PSD zoo tab sis cov dej ntws tsis zoo vim yog cov khoom siv satellite-cov spheres me me welded mus rau cov loj dua los ntawm kev sib tsoo hauv cov atomization ntauwd. Lawv ua zoo li me me anchors.
Kev tuav tom qab tsim khoom yog lwm qhov dub. Kuv twb pom zoo meej hmoov degraded los ntawm kev cia tsis raug. Kev ntub dej hauv cov hmoov ferrous yog ib qho classic. Txawm tias nyob rau hauv cov thawv ntim, yog tias lub tsev khaws khoom tsis tswj kev nyab xeeb, koj tau txais oxidation saum npoo uas ua rau mob compressibility thiab lub zog tensile kawg. Rau cov ntaub ntawv reactive xws li titanium los yog aluminium alloys, nws yog tag nrho lwm theem ntawm kev ntim khoom - feem ntau xav tau argon backfilling. Tus nqi ntawm cov hmoov yog ib yam; tus nqi khaws cia nws lub xeev mus txog thaum nws ntaus tuag yog lwm tus.
Qee zaum, kev daws teeb meem yog sib xyaw. Peb ib zaug muaj ib feem uas xav tau siab ntsuab zog tab sis kuj complex geometry. Ib qho hmoov nplej tsis tau txiav nws. Peb tau ua tiav kev sib xyaw ob pawg los ntawm tib lub hauv paus alloy tab sis nrog me ntsis sib txawv me me faib-ib coarser rau ntws, ib qho zoo dua rau kev khi. Cov txheej txheem sib xyaw nws tus kheej tau dhau los ua qhov tseem ceeb; Muab ob npaug rau-cone blending piv rau V-blending muab sib txawv homogeneity, cuam tshuam ib feem-rau-ib qhov sib xws. Nws yog ib qho yooj yim, siv sij hawm uas koj tsis tau pom ntawm daim ntawv PM glossy.
Qhov Tshwj Xeeb Alloys Conundrum thiab Kev Tsim Nyog
Qhov no yog qhov uas cov roj hmab tau raws txoj kev. Ua hauj lwm nrog cov txheej txheem hlau, tooj liab, lossis stainless hlau hmoov yog qhov ncaj. Cov saw hlau khoom yog mature. Tab sis thaum koj tus qauv tsim hu rau lub siab kub nickel-raws li alloy zoo li Inconel 718, los yog hnav-resistant cobalt-raws li alloy zoo li Stellite 6, txhua yam hloov.
Kev siv yaj ua ntej atomization yog qhov tseem ceeb. Cov ntsiab lus, cov ntsiab lus roj (oxygen, nitrogen), thiab homogeneity ntawm tus tswv alloy tag nrho tau imprinted rau cov hmoov. Ib qho kev sib cais me me hauv lub ingot tuaj yeem ua rau kub kub lossis tsis sib haum sintering tom qab. Rau machining tshwj xeeb zoo li QSY, leej twg tom qab ua CNC machining ntawm sintered PM qhov chaw, inconsistent hardness los yog muaj zog, nkig theem los ntawm impurity concentrations yuav rhuav tshem cov cuab yeej. Lawv xav tau kev kwv yees, cov khoom siv sib xws rau lub tshuab kom nruj nruj, uas tso lub nra rov qab rau cov hmoov ntau lawm kom xa cov khoom sib xws.
Kev nrhiav cov hmoov no yog qhov nyuaj. Cov ntim qis dua, cov txhuas lub sij hawm ntev dua. Koj feem ntau cuam tshuam ncaj qha nrog lub zeb uas tsim cov khoom siv hlau alloy lossis nrog lub tshuab atomizer tshwj xeeb. Nws tsis yog kev yuav khoom ntawm lub txee. Koj nyob nraum qhov tseem ceeb co-tsim cov khoom specification. Kuv nco qab txog qhov project rau aerospace foob qhov twg cov ntaub ntawv qhia txog hmoov yog 12 nplooj ntawv ntev. Nws xav tias ntau dhau ntawm lub sijhawm, tab sis nws tiv thaiv kev ua tsis tiav hauv kab.
Failures thiab Lessons Lawv Imprint
Koj kawm ntau dua los ntawm ib pawg uas ua tsis tau ntau dua li ntawm ib puas uas dhau mus. Thaum ntxov ntawm kuv lub sijhawm, peb muaj kev ua haujlwm qaug zog-tseem ceeb heev uas pib ua tsis tiav hauv kev sim. Cov pob txha tawg tau pom huv si, intergranular tsis ua haujlwm. Peb tau soj ntsuam txhua yam: nias siab, sintering kub thiab cua, kev kho cua sov. Txhua yam rau spec. Thaum kawg, peb rov qab mus rau hmoov ntau thiab ua qhov tob tob. Acid digestion tsom tau pom me ntsis siab dua li cov ntsiab lus nitrogen ib txwm. Lub atomizer tau siv qhov chaw ntawm argon nrog ntau dua nitrogen impurity rau cov khoom ntawd. Qhov me me nce hauv interstitial nitrogen embritttled cov qoob loo ciam teb txaus. Cov hmoov yog nyob rau hauv spec tshuaj, tab sis cov roj tsom xam spec yog dav dhau. Peb nruj nws, thiab qhov teeb meem ploj mus. Tam sim no, kuv paranoid txog cov ntawv pov thawj roj rau cov roj atomization nws tus kheej.
Lwm zaj lus qhia yog hais txog scale-up. Cov hmoov uas ua haujlwm zoo kawg nkaus hauv 50kg batch rau prototyping tuaj yeem coj txawv txawv hauv 2-tuj ntau lawm. Tus nqi cua txias hauv atomization ntauwd tuaj yeem sib txawv, ua rau muaj kev hloov maj mam hloov hauv microstructure. Koj yuav tsum hais kom tus tsav khiav ntawm qhov ze-tsim ua ntej kos npe tawm. Nws yog kim thiab siv sij hawm, tab sis pheej yig dua li qhov rov qab tag nrho.
Qhov no Txhua Qhov Txuas Txuas: Cov Kev Sib Txuas Sib Txuas
Qhov no coj kuv mus rau qhov dav dav. Hmoov ntau lawm tsis yog ib kauj ruam cais. Nws yog thawj qhov txuas hauv cov saw hlau uas suav nrog kev tsim, sintering, thiab feem ntau cov haujlwm thib ob nyiam CNC machining los yog kev kho saum npoo. Cov txiaj ntsig zoo tshaj plaws tuaj thaum muaj kev tawm tswv yim raws tag nrho cov saw hlau.
Ib lub tuam txhab uas tuav ob qho tib si siab tshaj casting (plhaub molding, peev casting) thiab precision machining, zoo li qhov koj yuav pom ntawm https://www.tsingtaocnc.com, embodies qhov kev koom ua ke. Lawv pom qhov kawg-siv kev ua tau zoo. Yog hais tias ib feem lawv tshuab los ntawm sintered PM dawb paug muaj cov cuab yeej tsis zoo lub neej los yog qhov tsis muaj peev xwm ua kom muaj kev ruaj ntseg, qhov kev tawm tswv yim yuav tsum rov qab mus rau sinterer, thiab thaum kawg mus rau cov hmoov tsim tawm. Puas yog oxide suav nrog hauv cov hmoov? Ib qho hollow particle uas tawg thaum sintering? Qhov kev nkag siab kaw kaw no yog dab tsi cais qhov zoo ntawm cov khoom txhim khu kev qha, kev ua haujlwm siab.
Yog li, thaum koj saib ntawm PM ua tiav, koj tsis yog saib ntawm cov hlau nias thiab sintered. Koj tab tom saib keeb kwm ntawm yaj, physics ntawm lub atomization nozzle, logistics ntawm tuav, thiab ib tug series ntawm kev tswj tsis txaus siab. Cov hmoov yog DNA. Thiab zoo li DNA, me me, tsis pom qhov tsis zoo tuaj yeem txiav txim siab txoj hmoo ntawm tag nrho lub cev. Tau txais nws txoj cai yog tsawg dua ntawm kev siv thev naus laus zis thiab ntau ntxiv txog kev mloog tsis tu ncua kom nthuav dav, tau kawm ntau zaus los ntawm kev paub nyuaj.
