Thaum koj hnov ' hmoov metallurgy stainless hlau', lub suab tam sim yog ib txwm nyob ze-net-shaped complexity thiab cov khoom txuag. Qhov ntawd muaj tseeb, tab sis tsuas yog ib nrab ntawm zaj dab neeg xwb. Qhov kev sib tham tiag tiag, qhov tshwm sim ntawm cov engineers uas tau sim qhia nws lossis tshuab nws, tig mus ncig ntawm qhov sib txawv ntawm daim ntawv cog lus thiab kev cob qhia kev muaj tiag. Nws tsis yog rab phom khawv koob; nws yog ib qho khoom siv nrog cov txheej txheem tshwj xeeb heev. Kuv tau pom ntau tus qauv tsim uas kho nws zoo li kev hloov pauv rau wrought 316L, tsuas yog khiav mus rau cov teeb meem nrog porosity, tsis sib xws machinability, lossis kev kho cua sov xav tsis thoob. Lub allure yog muaj zog - tsim intricate qhov chaw xws li valve Cheebtsam los yog sensor vaj tse nrog tsawg kawg nkaus pov tseg - tab sis qhov kev tua xav kom muaj kev hwm rau cov txheej txheem, los ntawm cov hmoov feedstock mus rau qhov kawg sinter.
Cov Lus Cog Tseg Tseem Ceeb thiab Cov Lus Nug Tsis Txaus Siab
Qhov zoo tshaj plaws yog geometric ywj pheej. Peb tab tom tham txog qhov chaw uas yuav yog npau suav phem rau tshuab los ntawm bar Tshuag lossis txawm tias peev cam khwb cia. Xav txog lub twj tso kua mis me me nrog cov kab sab hauv, lossis cov cuab yeej kho mob hauv tsev nrog undercuts. Hmoov metallurgy ua rau cov kev lag luam muaj txiaj ntsig nyob rau hauv nruab nrab mus rau qhov ntim siab. Cov qib stainless hlau, feem ntau 304L, 316L, thiab qhov nrov 17-4 PH, muab cov kev tiv thaiv corrosion xav tau rau cov ntawv thov no.
Tab sis ntawm no yog thawj qhov teeb meem: ceev. Achieving full density is costly and not always the goal. Feem ntau cov txheej txheem yog sintered rau ib theem uas ua tau raws li cov neeg kho tshuab spec. Qhov no tawm residual, interconnected porosity. Nws tsis tas yuav muaj qhov tsis xws luag; nws yog tus yam ntxwv. Txawm li cas los xij, qhov porosity no yog lub hauv paus ntawm ntau qhov teeb meem hauv qab. Nws cuam tshuam rau kev ua haujlwm zoo corrosion-lub qhov hws tuaj yeem cuam tshuam cov kua dej thiab ua rau muaj kev xeb, uas yog vim li cas rau qhov tseem ceeb ntawm cov dej tuav, kev ua haujlwm thib ob xws li resin impregnation lossis kub isostatic pressing (HIP) ua tsis tau. Kuv nco qab ib pawg ntawm 316L flanges rau cov neeg siv khoom siv tshuaj lom neeg; lawv dhau cov ntsev tsuag tshuaj ntsuam raws li-sintered, tab sis ua tsis tau tejyam nyob rau hauv lub tshav pob tom qab rau lub hlis vim hais tias lub internal porosity phem nyob rau hauv nruab nrab. Peb yuav tsum tau retrofit lub nqus impregnation kauj ruam rau tag nrho cov kev txiav txim yav tom ntej.
Qhov porosity no tseem cuam tshuam ncaj qha rau machinability. Koj cov cuab yeej txiav tsis yog shearing hlau xwb; nws ntsib ib tug qauv uas yog intermittently khoom thiab void. Qhov no ua rau micro-chatter, nrawm nrawm hnav (tshwj xeeb tshaj yog ntawm kev xyaum thiab cov kais dej), thiab qhov ua tiav saum npoo tuaj yeem saib tsis zoo yog tias tsis ua haujlwm raug. Koj tsis tuaj yeem siv tib qhov txau thiab nrawm li rau cov khoom siv wrought. Nws yuav tsum muaj kev teeb tsa nruj dua, cov cuab yeej ntse dua, thiab qee zaum txawm tias muaj qhov sib txawv ntawm cov kua dej los tiv thaiv kev txhaws ntawm qhov pores nrog swarf.
Machining lub xeev Sintered: Kev koom tes nrog cov khw zoo li QSY
Qhov no yog qhov theoretical raws li cov tswv yim, thiab yog vim li cas kev koom tes nrog ib tug foundry thiab tshuab khw uas nkag siab txog tag nrho cov saw tseem ceeb heev. Koj tsis tuaj yeem xa cov sintered dawb paug rau txhua lub khw CNC. Lawv yuav tsum paub qhov lawv tuav. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) nthuav tawm ib rooj plaub nthuav. Nrog rau ntau tshaj 30 xyoo nyob rau hauv casting thiab machining, lawv tau pom cov evolution ntawm ze-net-zoo txheej txheem. Thaum lawv cov tub ntxhais kawm nyob rau hauv plhaub thiab peev casting, cov ntsiab lus txhais. Lawv nkag siab txog kev coj tus cwj pwm tom qab molding, kev ntxhov siab ntawm machining, thiab qhov tseem ceeb ntawm kev tswj cov txheej txheem rau alloys. Rau ib hmoov metallurgy stainless hlau tivthaiv, lawv cov kws tshaj lij CNC machining dhau los ua qhov tseem ceeb thib ob ntawm qhov sib npaug.
Qhov tseem ceeb yog kev sib txuas lus. Thaum peb tau ua haujlwm nrog cov khw muag khoom ntawm P / M qhov chaw, cov duab kos yuav tsum qhia meej txog qhov sib txawv ntawm sintered thiab nco ntsoov tias nws yog cov khoom siv sintered. Qhov no ceeb toom tus kws kho tshuab. Qhov tseem ceeb ntawm qhov ntev feem ntau xav tau kev ua tiav tom qab sintering kom suav rau qhov me me distortion. Lub khw tau ntsib nrog cov castings, zoo li QSY, twb tau ua tiav ntawm qhov no - nrhiav cov ntaub ntawv, nkag siab tias thawj qhov kev txiav yuav nthuav tawm qhov pore, thiab muaj cov txheej txheem rau kev cuam tshuam nrog nws yam tsis muaj qhov seem. Lawv cov kev paub nrog cov alloys tshwj xeeb, xws li npib tsib xee thiab cobalt hauv paus, kuj qhia txog kev paub txog cov khoom siv tshuab nyuaj, uas yog lub hauv paus zoo rau tackling sintered stainless.
Ib qho kev sib tw tshwj xeeb yog threading. Tapping ib feem sintered yog nug txog teeb meem yog tias lub qhov tsis zoo tag nrho thiab tus kais dej tsis zoo. Peb feem ntau hais txog xov milling rau kev sib txuas tseem ceeb, los yog tsim rau kev siv xov-forming screws uas compact cov khoom ntau dua li txiav nws. Qhov no yog hom kev nthuav dav uas tau hammered tawm hauv lub rooj sib tham ua ntej tsim khoom nrog tus khub machining.
Lub 17-4 PH Conundrum: nag lossis daus thiab Dimensional Shifts
Yog hais tias tus qauv austenitic qib zoo li 316L muaj lawv cov quirks, 17-4 PH stainless ua los ntawm hmoov metallurgy yog ib tug tsiaj nyaum ntawm nws tus kheej. Qhov kev thov rov hais dua yog pom tseeb: siab zog thiab hardness tom qab kev kho cua sov. Tab sis cov txheej txheem nag lossis daus hardening yog txoj kev nruj nruj nrog cov ntaub ntawv sintered.
Tus qauv H900 kev kho mob (900 ° F hnub nyoog) ua haujlwm, tab sis qhov hloov pauv ntawm qhov loj me yog qhov kwv yees tsawg dua nrog cov khoom siv wrought. Ib feem twb tau shrinkage thaum lub sij hawm sintering. Kev laus kev kho mob qhia txog lwm yam, me me, tab sis tseem muaj qhov hloov pauv loj. Rau ib feem nrog nruj tolerance thoob plaws ntau yam nta, qhov no tuaj yeem ua npau suav phem. Peb tau kawm qhov no txoj kev nyuaj ntawm tus qauv ua haujlwm rau lub drone actuator tivthaiv. Raws li-sintered qhov ntev yog zoo meej. Tom qab cov tshuaj kho thiab kev laus, lub bore txoj kab uas hla shrunk tshaj qhov kam rau ua, thaum lub sab nraud flange txoj kab uas hla yog NW nyuam qhuav cuam tshuam. Lub anisotropy yog vim tus thawj compaction kev taw qhia ntawm cov hmoov.
Txoj kev daws teeb meem, txawm tias kim dua, feem ntau yog siv los ua qhov kawg qhov ntev hauv cov hnub nyoog dhau los (Cov Cai A) lossis cov tshuaj kho mob, thiab tom qab ntawd muaj hnub nyoog. Tab sis qhov no yuav tsum tau paub meej npaum li cas qhov yuav loj hlob los yog poob thaum lub sij hawm laus rau cov khoom tshwj xeeb thiab lub cub tawg. Nws dhau los ua cov txheej txheem raws li daim ntawv qhia, tsis yog kev ua haujlwm txheem. Qhov kev tswj hwm qib no yog qhov kev sib koom ua ke ntawm P / M tus tsim khoom thiab tus kws kho qhov tseeb yog qhov tseem ceeb heev. Tus kws kho tshuab xav tau cov ntaub ntawv kho cua sov zoo los ntawm sinterer kom paub tias cov khoom siv dab tsi siv rau hauv lawv qhov kev pab cuam CNC rau kev ua haujlwm ua ntej hnub nyoog.
Thaum Nws Ci (Thiab Thaum Pom Lwm Qhov)
Yog li thaum twg hmoov metallurgy stainless hlau tus yeej undisputed? Nws yog rau complex, kuj me me rau nruab nrab qhov chaw uas siv cov khoom siv los ntawm wrought Tshuag yuav qis dua 40%, thiab qhov ntau lawm ntim justifies tus nqi cuab yeej rau lub compaction tuag. Cov piv txwv zoo heev yog cov khoom siv xauv, cov khoom siv roj hauv tsheb (xws li cov paib viav vias), thiab qee yam cuab yeej phais lub puab tsaig. Qhov sib xws ntawm cov hmoov niaj hnub no thiab tswj sintering rauv yields zoo heev batch-rau-batch repeatability rau cov ntawv thov no.
Txawm li cas los xij, feem ntau nws tsis yog qhov kev xaiv zoo tshaj plaws rau cov duab yooj yim (ib qho yooj yim spacer lossis ntxhua khaub ncaws), rau qhov loj heev uas lub peev xwm xovxwm yog txwv, lossis rau cov ntawv thov uas xav tau qhov siab tshaj plaws corrosion tsis kam lossis qaug zog lub zog ntawm tag nrho wrought, forged, thiab annealed microstructure. Nyob rau hauv cov ntaub ntawv no, ib txwm casting txoj kev los ntawm ib tug tshwj xeeb xws li QSY, los yog machining los ntawm bar, tej zaum yuav txhim khu kev qha thiab raug nqi. Kev nqis peev casting, piv txwv li, tuaj yeem ua tiav qhov nyuaj zoo sib xws thiab feem ntau zoo dua qhov ua tiav thiab qhov ntom ntom rau qee qhov geometries, txawm tias nrog tus nqi sib txawv.
Qhov kev txiav txim siab matrix yeej tsis yog hais txog tus nqi khoom ib kilogram xwb. Nws yog hais txog tag nrho cov nqi ntawm ib qho tiav, qhov ua haujlwm, uas suav nrog kev ua haujlwm thib ob, txhua qhov xav tau impregnation lossis plating, cov nqi seem, thiab kev ua haujlwm hauv thaj chaw. Nws yog ib qho kev xaiv engineering.
Lub neej yav tom ntej yog nyob rau hauv Blend thiab khi
Cov kev txhim kho nthuav dav tam sim no tsis yog nyob rau hauv cov tshiab stainless hlau hmoov sib xyaw, tab sis nyob rau hauv cov txheej txheem uas khi lawv. Hlau Txhaj Moulding (MIM), uas siv cov hmoov nplej zoo dua thiab cov khoom siv yas, thawb lub hnab ntawv nyuaj txawm tias ntau dua li cov xovxwm-thiab-sinter P / M, txawm hais tias nws los nrog nws tus kheej debinding cov nyom thiab yog qhov zoo tshaj plaws rau qhov me me.
Lwm qhov chaw yog hybrid cov ntaub ntawv-stainless steel hmoov sib xyaw nrog cov roj nplua nyeem xws li tooj liab lossis cov khoom tawv tawv. Qhov no tuaj yeem tsim tus kheej-lubricating bearings lossis qhov chaw nrog cov khoom sib tw hauv ib lub voj voog sintering. Tab sis dua, qhov no qhia txog kev hloov pauv tshiab hauv machining. Yuav ua li cas koj tshuab ib cheeb tsam uas yog 90% hlau thiab 10% tooj liab? Cov cuab yeej hnav qauv hloov pauv ntawm ib feem.
Thaum kawg, ua hauj lwm nrog hmoov hlau metallurgy stainless hlau yog ib qho kev tawm dag zog hauv kev tswj kev sib haum xeeb thiab kev paub tob txog txheej txheem. Nws yuam kom koj xav txog qhov tseeb, los ntawm qhov pib tuag tsim mus rau qhov kawg QC kos. Nws tsis yog cov khoom uas koj tsuas yog xaj; Nws yog ib txoj hauv kev uas koj koom nrog, sib koom tes nrog ob tus sinterer thiab tus kws kho tshuab kom taug qab qhov chaw ntawm qhov zoo tshaj plaws isotropic khoom thiab lub peev xwm zoo kawg nkaus, tab sis me ntsis quirky, sintered kev muaj tiag. Cov tuam txhab lag luam uas ua tiav nrog nws yog cov uas txuas rau lub ntiaj teb no, zoo li yuav ua li cas kev sib koom ua haujlwm spanning casting thiab CNC machining, xws li QSY, tswj cov nuances ntawm alloy cwj pwm los ntawm pwm mus rau cov khoom tiav.
