Thaum ib tug neeg hais tias 'qhov tshwj xeeb stainless hlau,' ib nrab ntawm lub sij hawm lawv tab tom picturing ib yam dab tsi tawm ntawm ib tug sci-fi movie, lwm ib nrab lawv tsuas yog txhais tau tias 316L. Qhov ntawd yog thawj qhov sib txawv ntawm cov nplooj ntawv spec thiab kev tsim tiag tiag. 'Tshwj xeeb' tsis yog ib qib xwb; nws yog ib qho kev sib tham txog tag nrho lub neej voj voog - los ntawm cov alloy tus cwj pwm nyob rau hauv lub crucible rau nws cov kev ua tau zoo nyob rau hauv ib tug tshwj xeeb corrosive nruab nrab los yog kev nyuaj siab voj voog. Kuv tau pom ntau cov duab kos qhov twg cov khoom siv hu xov tooj yog qhov kev xav tom qab, theej los ntawm ib qhov haujlwm qub, ua rau lub ntiaj teb kev mob thaum lub sij hawm machining lossis, qhov phem dua, hauv thaj teb. Txoj haujlwm tiag tiag pib thaum koj khawb rau hauv dab tsi ua rau nws tshwj xeeb: nws puas yog cov ntsiab lus molybdenum rau pitting tsis kam, tswj nitrogen rau lub zog, lossis cov kev kho cua sov tshwj xeeb rau cov qauv dual-theem? Qhov ntawd yog qhov twg xyoo caum hauv kev lag luam no, zoo li ntawm Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), suav. Koj tsim kev xav rau nws.
Tshwj xeeb hauv Alloy Soup
Wb tham txog alloys. 304, 316—cov no yog vanilla. Thaj chaw 'tshwj xeeb' pib nrog tej yam xws li 17-4PH, 2205 duplex, lossis super austenitics zoo li 254 SMO. Tab sis naming lawv yog ib qho yooj yim. Qhov ua kom yuam kev yog paub tias ib qho ' tshwj xeeb stainless hlau ib feem' ua los ntawm 17-4PH tsis yog tshwj xeeb tiag tiag kom txog thaum nws tsoo H1150 lossis H900 mob. Lub tswv yim machining rau kev daws teeb meem-annealed xeev piv rau cov laus lub xeev yog txawv kiag li. Ua tsis ncaj ncees lawm, thiab koj yuav hlawv los ntawm cov cuab yeej lossis ua rau micro-cracks. Peb tau kawm qhov no thaum ntxov nrog ib pawg ntawm cov stems. Lub spec hais tias 17-4PH, tab sis qhov kev kho cua sov tseem ceeb tsis meej. Peb tshuab lawv tag nrho tom qab kev laus, xav tias nws yog lub xeev kawg. Cov neeg siv khoom tom qab xav tau kev tsim tweak-qhov yooj yim zawj. Sim tshuab cov khoom uas muaj hnub nyoog yog npau suav phem; cov cuab yeej hnav yog astronomical. Yuav tsum tau tshuav ib co Tshuag rau zaum kawg machining tom qab laus. Ib qho yuam kev yooj yim uas zoo li pom tseeb hauv qab.
Tom qab ntawd muaj qhov khoom. Tsis yog txhua qhov tshwj xeeb stainless yog tsim sib npaug. Lub yaj los ntawm Mill A tuaj yeem coj txawv txawv ntawm Mill B, tshwj xeeb tshaj yog nrog cov complex super alloys. Rau lub twj tso kua mis tseem ceeb hauv cov dej ntsev txhaj tshuaj, peb tau hais kom traceability rov qab mus rau lub yaj ntau thiab daim ntawv qhia txog kev ntsuas zeb. Tus nqi ntxiv thiab lub sijhawm ua haujlwm tau tsa pob muag thawj zaug, tab sis nws tshem tawm qhov sib txawv thaum peb ntsib cov cuab yeej tsis sib xws thaum lub sijhawm ua haujlwm tob tob. Tig tawm, qhov sib txawv me ntsis ntawm cov ntsiab lus sulfur (hauv spec, tab sis ntawm qhov siab kawg) los ntawm qhov chaw thib ob tau ua rau nws. Peb tam sim no ua tsis tau raws li kev ntseeg siab ntawm cov khoom siv rau txhua yam dhau 316, kev xyaum ua kom tiav QSY's 30 xyoo nyob rau hauv casting thiab machining.
Thiab casting nws? Qhov ntawd yog lwm txheej. Pouring nickel-raws li alloy zoo li Inconel 625 rau hauv lub plhaub pwm rau qhov nyuaj, nyias-walled tshwj xeeb stainless hlau ib feem yog art. Lub fluidity yog txawv, lub shrinkage yog ntau pronounced, thiab kev pheej hmoo ntawm kub tearing yog tiag tiag. Koj tsis tuaj yeem siv tib lub rooj vag thiab nce qhov system koj xav siv rau cov hlau. Nws yuav tsum tau simulation thiab ntau qhov kev xav ntawm qhov chaw. Peb tau muaj peb feem ntawm cov pawg khib nyiab thaum ntxov, kawm paub tias qhov kub thiab txias ntawm cov pwm thiab lub ncuav nrawm yuav tsum tau hu rau hauv nrog yuav luag obsessive precision rau cov ntaub ntawv no.
CNC Machining: Qhov Kev Xav Tau Raws Li Kev Txiav Ntug
Qhov no yog qhov uas cov roj hmab tau raws txoj kev. Txhua tus tuaj yeem yuav ib lub bar ntawm super duplex stainless; ua qhov tseeb, tsis muaj kev ntxhov siab los ntawm nws yog qhov kev sib tw. Thawj txoj cai: hwm lub zog ua haujlwm. Austenitic thiab duplex qib nyiam kom tawv thiab tawv txoj cai nyob rau hauv koj cov cuab yeej txiav. Yog tias koj ntshai nrog koj qhov tob ntawm kev txiav los yog pub, koj tsuas yog rub thiab cua sov ntawm qhov chaw, tsim kom muaj txheej tawv tawv uas yuav ua rau koj cov cuab yeej dhau los. Koj yuav tsum tau nyob rau hauv qhov chaw ua haujlwm nyuaj. Kev txhoj puab heev, kev txiav tsis tu ncua feem ntau ua haujlwm zoo dua li ceev faj.
Coolant tsis yog ua kom txias xwb; nws yog rau lubrication thiab nti khiav tawm. Rau ntau yam ntawm cov nplaum nplaum no, lub siab-siab los ntawm cov cuab yeej coolant system yog tsis-negotiable. Nws rhuav tshem cov nti thiab tshem tawm ntawm qhov chaw txiav. Peb kawm qhov no ntawm ib qhov project rau ib tshwj xeeb stainless hlau ib feem-a turbine blade tuav thaiv los ntawm Alloy 718. Cov chips tau vuam lawv tus kheej mus rau qhov ntxig, ua rau muaj kev puas tsuaj loj. Hloov mus rau lub tshuab hluav taws xob siab thiab siv qhov tshwj xeeb, siab-lubricity coolant formulation hloov txhua yam. Qhov kev ua tiav tau zoo tuaj, thiab lub cuab yeej siv tau tripled.
Toolpath lub tswv yim tseem ceeb tshaj li cov neeg xav. Climb milling feem ntau nyiam rau cov pa milling kom txo qis ua haujlwm hnyav. Tab sis rau nyias-walled seem feem ntau nyob rau hauv peev cam khwb cia qhov chaw, koj yuav tsum xav txog rigidity. Qee zaum koj yuav tsum siv txoj kev trochoidal milling los yog kho cov kauj ruam los tswj cov cuab yeej siab thiab tiv thaiv qhov deflection. Nws tsis yog tsuas yog hais txog CAM software qhov chaw pib; nws yog hais txog tus programmer paub tias cov khoom yuav thawb rov qab li cas. Qhov no yog hom kev ua haujlwm ntawm tes CNC machining kev paub uas cais lub khw ua haujlwm los ntawm tus kws tshaj lij.
Casting Foundation: Plhaub thiab Kev nqis peev
Feem ntau ntawm cov khoom tshwj xeeb no pib ua castings, tshwj xeeb tshaj yog rau cov geometry nyuaj. Plhaub molding thiab peev casting yog peb qhob cij thiab butter ntawm QSY. Rau stainless, qhov kev xaiv ntawm lawv feem ntau los ntawm ntim, nto tiav, thiab qhov ntev ntev. Plhaub molding yog qhov zoo rau kev khiav lag luam loj ntawm qee qhov nyuaj, tab sis rau cov khoom sib txawv tiag tiag - xav tias impellers nrog cov hniav sib tsoo, los yog cov blocks nrog cov kab sab hauv - kev nqis peev casting yog tib txoj kev.
Tab sis ntawm no yog ib qho nuance: lub plhaub ceramic rau peev casting tuaj yeem cuam tshuam nrog cov hlau. Rau qhov kub-kub alloys nplua nuj nyob rau hauv reactive hais xws li titanium los yog txhuas, koj xav tau ib tug tshwj xeeb lub ntsej muag lub tsho tiv no (xws li yttria-raws li slurry) los tiv thaiv cov tshuaj tiv thaiv uas ruins saum npoo. Peb pom qhov no tawm ntawm txoj kev nyuaj ntawm kev khiav thaum ntxov ntawm cobalt-based alloy qhov chaw. Qhov saum npoo tuaj tawm pitted thiab ntxhib, yuav tsum tau ntau dhau thiab kim kawg machining. Kev kho yog nyob rau hauv thawj kauj ruam: lub ceramic formulation. Tam sim no nws yog tus qauv kuaj ntawm peb daim ntawv txheej txheem rau reactive alloys.
Dimensional tswj yog lwm tsiaj nyaum. Lub shrinkage factor rau 17-4PH ib feem yog txawv ntawm qhov ntawm 316 ib feem, thiab nws tsis yog linear. Nws tuaj yeem sib txawv nrog ntu thickness. Peb tuav ntau cov qauv databases thiab kho yam tseem ceeb, ua los ntawm kev ntsuas ntau pua ntawm thawj-kab lus castings. Nws yog empirical, tsis yog theoretical xwb. Thaum tus neeg siv khoom xa peb cov ntawv luam tawm tshiab tshwj xeeb stainless hlau ib feem, peb tsis yog saib ntawm qhov kawg qhov ntev; peb nyob nraum hlwb xam cov qauv qhov ntev, qhov xav tau distortion, thiab qhov twg peb yuav tau ntxiv machining Tshuag. Nws yog ib tug backward-forwards seev cev.
Failure yog Data Point
Koj tsis kawm los ntawm kev khiav zoo tag nrho. Koj kawm los ntawm cov uas mus rau sab. Kuv nco qab ib pawg ntawm lub cev loj valve hauv 2205 duplex. Lawv dhau tag nrho cov kev ntsuam xyuas qhov ntev thiab PMI (Positive Material Identification). Tab sis hauv kev ntsuam xyuas siab, ob peb pom tias micro-leaks ntawm qhov tseem ceeb weld junction. Tus neeg ua txhaum? Ferrite-austenite theem tshuav nyiaj li cas. Kev kho cua sov tom qab vuam tsis zoo, tawm hauv thaj chaw uas muaj ferrite siab dhau, cuam tshuam corrosion tsis kam thiab kev ncaj ncees. Cov khoom siv yog technically 2205, tab sis nws cov khoom 'tshwj xeeb' - cov qauv sib npaug - tau ploj hauv zos. Peb yuav tsum tau hloov kho peb cov txheej txheem kev kho cua sov tom qab vuam rau tuab-section duplex welds. Tam sim no, peb feem ntau qhia thiab ua qhov kev sib tshuam ntawm qhov kub thiab txias thiab tom qab-weld tov annealing rau qhov tseem ceeb welds ntawm cov ntaub ntawv no.
Lwm classic tsis ua hauj lwm yog over-specifying. Ib tus neeg siv khoom ib zaug tau hais rau Alloy C276 (ib qho zoo heev npib tsib xee-raws li alloy) rau ib feem cuam tshuam rau ib puag ncig acidic me ntsis ntawm chav tsev kub. Nws yog loj overkill. Peb pom zoo 904L super austenitic, uas yuav ua tau zoo kawg nkaus ntawm ib nrab ntawm cov khoom siv thiab ua kom yooj yim rau tshuab. Lawv tau kho ntawm cov khoom siv zoo tshaj plaws. Peb ua nws, lawv them tus nqi them, tab sis nws yog qhov kev txiav txim siab tsis zoo ntawm engineering. Ib feem ntawm peb txoj haujlwm yog kev sab laj, thawb rov qab maj mam nrog cov ntaub ntawv. Qee zaum koj yeej qhov kev sib tham, qee zaum koj tsis ua, tab sis koj yuav tsum sim.
Cov kev paub no, qhov zoo thiab qhov tsis zoo, yog qhov qhia txog txheej txheem niaj hnub no. Thaum koj saib cov peev xwm teev nyob rau hauv ib qhov chaw zoo li https://www.tsingtaocnc.com, tom qab txhua kab - tshwj xeeb alloys, CNC machining, peev casting - muaj ntau pua zaj dab neeg zoo li no. Lawv tsis yog kev pabcuam xwb; lawv tau kawm, thiab qee zaum nyuaj khwv tau, txheej txheem.
Kev xa tawm tiag tiag
Yog li, tus neeg siv khoom tau txais dab tsi thaum lawv xaj qhov tseeb tshwj xeeb stainless hlau ib feem los ntawm ib tug vertically integrated txiag? Lawv tsis tsuas yog yuav ib lub chunk ntawm hlau zoo li tus kos duab. Lawv tab tom yuav cov lus qhia xaiv cov khoom siv (lossis siv tau), cov kws tshaj lij hauv kev tsim cov khoom pov tseg kom zoo, kev paub txog kev txiav nws zoo yam tsis muaj kev ntxhov siab, thiab cov kev kuaj xyuas zoo uas dhau mus dhau lub caliper-xws li PMI, PT, RT, lossis kev kuaj corrosion yog xav tau.
Qhov kawg yog qhov tseem ceeb. Daim iav polish yuav yog rau cov tshuaj pleev ib ce, tab sis qhov tshwj xeeb Ra tiav (hais, 0.8μm) ntawm qhov chaw sib khi ua haujlwm. Rau qhov chaw nyob rau hauv ib puag ncig chloride, passivation yog ib qho yuav tsum ua kom tiav cov txheej txheem passive oxide. Tab sis passivating ib tug duplex stainless hlau yuav tsum muaj ib tug sib txawv nitric acid da dej concentration thiab kub tshaj rau tus qauv austenitic. Ua tsis ncaj ncees lawm, thiab koj tuaj yeem ua rau muaj kev xeb.
Thaum kawg, nws los rau kev kho cov khoom nrog kev hwm txij thaum pib mus txog rau thaum xaus. Txij li thaum lub alloy raug xaiv, los ntawm cov qauv khw, lub hauv paus foundry, CNC tshuab, thiab kev soj ntsuam zaum kawg, txhua kauj ruam xav tau kev paub txog dab tsi ua rau stainless hlau 'tshwj xeeb.' Nws tsis yog khawv koob; Nws yog metallurgy, mechanics, thiab ntau yam kev mob siab rau kev nthuav dav. Qhov ntawd yog dab tsi hloov qhov kev txiav txim yuav khoom mus rau hauv ib qho kev txhim khu kev qha uas ua haujlwm nyob rau hauv lub xyoo. Thiab qhov ntawd tsuas yog qhov tshwm sim uas tseem ceeb heev.
