Thaum cov neeg feem coob hnov 'casting iron', lawv pom ib qho hnyav hnyav lossis lub tshuab hluav taws xob Victorian-era. Qhov ntawd yog pej xeem lub ntsej muag ntawm nws. Hauv kev lag luam, tshwj xeeb tshaj yog tom qab kaum xyoo zoo li peb tau muaj ntawm QSY, koj kawm nws tsawg dua ntawm cov khoom siv nws tus kheej thiab ntau ntxiv txog kev sib yuav ntawm cov hlau cov khoom siv thiab cov txheej txheem casting xaiv los siv lawv. Qhov loj tshaj misconception? Tias nws yog ib qho khoom siv tsis sib xws. Tsis yog. Qhov sib txawv ntawm lub cev muaj zog hlau valve lub cev uas yuav tsum tau tiv taus siab siab thiab grey hlau counterweight uas tsuas yog xav tau huab hwm coj thiab damping yog qhov loj, thiab txuas qhov sib txawv yog qhov ua haujlwm tiag tiag.
Tsev Neeg Tsob Ntoo ntawm Hlau Castings
Koj tsis tuaj yeem tham txog khw hlau casting tsis tam sim ntawd tawg nws. Grey hlau, ductile (nodular) hlau, malleable hlau, compacted graphite ... txhua tus muaj nws tus kheej. Grey hlau, nrog nws cov graphite flakes, yog qhov zoo rau damping vibrations - xav tias cov cuab yeej siv lub hauv paus. Tab sis sim muab nws nyob rau hauv qhov tseem ceeb tensile kev nyuaj siab thiab cov flakes ua zoo li built-in crack starters. Qhov ntawd yog qhov uas cov hlau nplaum tuaj rau hauv. Cov tshuaj magnesium uas spheroidizes graphite hloov txhua yam. Lub zog tensile dhia, koj tau txais qee qhov elongation. Nws yog ib qho kev ua si-hloov rau qhov chaw pom dynamic loads.
Kuv nco qab txog qhov project thaum ntxov, ib tus neeg siv khoom xav tau ib qho hydraulic manifold hauv qhov lawv tsuas yog hu ua cam khwb cia hlau. Cov ntawv luam tawm tau qhia txog qib generic. Peb thawb rov qab, nug txog lub voj voog siab thiab muaj peev xwm cuam tshuam. Lawv tsis tau xav txog nws. Peb prototyped nyob rau hauv grey hlau - nws machined zoo nkauj, muaj zog. Tab sis kev ntsuam xyuas siab qhia tau tias micro-porosity xau raws txoj hauv kev flake. Peb hloov mus rau ferritic ductile hlau, kho cov rooj vag tsim los xyuas kom meej magnesium zoo. Qhov thib ob puag ncig tuav. Zaj lus qhia? Cov lus qhia cam khwb cia hlau yog yuav luag tsis muaj txiaj ntsig yam tsis muaj prefix.
Tom qab ntawd muaj alloyed hlau. Nickel, chromium, molybdenum ntxiv. Cov no tsis yog rau corrosion kuj. Lawv ruaj khov pearlite, ua kom lub zog thiab hnav tsis kam ntawm qhov kub siab. Peb tau ua cov twj tso kua mis rau abrasive slurries nrog 15-20% nickel-chrome alloyed dawb hlau. Raws li-cam khwb cia hardness yog lim hiam, nyob ze tsis yooj yim sua rau tshuab tsuas yog kev sib tsoo. Koj yuav tsum tsim rau qhov ntawd, npaj cov txheej txheem nyob ib puag ncig nws. Nws yog ib tug tsiaj nyaum sib txawv tag nrho los ntawm cov qeb.
Txheej txheem Dictates Performance: Plhaub vs. Investment
Ntawm peb lub khw, Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), peb khiav ob lub plhaub pwm thiab peev casting kab. Kev xaiv ntawm lawv rau ib qho khoom siv hlau tsis yog hais txog ntim lossis nqi; nws yog hais txog geometry thiab kev ncaj ncees. Plhaub molding, siv resin-coated xuab zeb, muab rau koj ib tug superb nto tiav thiab qhov tseeb qhov tseeb piv rau cov tsoos ntsuab xuab zeb. Nws yog ib qho zoo heev rau nruab nrab-complexity qhov chaw xws li cav brackets los yog compressor vaj tse. Cov kaum sab xis tuaj yeem yog qhov tsawg, thiab koj tswj tau zoo sib xws.
Tab sis thaum koj muaj cov lus sab hauv, undercuts, los yog tiag tiag intricate geometries uas yuav tsum tau tsis yooj yim sua core assemblies nyob rau hauv cov xuab zeb, uas yog qhov chaw peev casting kauj ruam nyob rau hauv. Peb tau tsim impellers thiab turbine vaj tse nyob rau hauv cov hlau ductile li no. Kev ntes nrog hlau hauv peev casting? Nws yog txhua yam hais txog lub ncuav. Hlau qhov kub siab dua piv rau steel lossis superalloys stresses lub plhaub ceramic txawv. Koj tau txais kev pheej hmoo ntau dua ntawm cov tshuaj tiv thaiv hlau-plhaub, muaj peev xwm ua rau muaj qhov tsis xws luag yog tias lub plhaub tsis ci zoo kawg nkaus. Nws yuav tsum muaj kev tswj xyuas nruj ntawm cov dej khib nyiab thiab cov sintering uas koj tuaj yeem khiav mus deb ntawm kev ua sloppier rau ntawm qhov tsis muaj stainless.
Ib qho kev ua tsis tiav uas nrog kuv yog kev khiav ntawm cov hlau nplaum me me ntawm cov khoom siv hluav taws xob los ntawm kev nqis peev casting. Cov seem ntsia zoo meej, dhau qhov pom. Tab sis thaum lub sij hawm tus neeg siv khoom lub siab ntsuas, ob peb leaked. Peb faib lawv, pom cov kua muag me me nyob ze ntawm kev sib tshuam. Qhov teeb meem yog qhov rooj vag. Peb tau siv tus tsim optimized rau steel lub solidification ntau yam. Hlau, nrog rau nws qhov sib txawv shrinkage thiab carbon cwj pwm, xav tau ib tug gradient thermal gradient nyob rau hauv qhov chaw tshwj xeeb. Peb hloov lub sprue thiab khiav layout, ntxiv ib tug me me txias nyob rau hauv lub wax ntoo. daws nws. Nws yog cov txheej txheem hloov maj mam tshwj xeeb uas cais cov khoom siv tau los ntawm kev txhim khu kev qha.
Kev sib tsoo tshuab: Casting rau CNC
Qhov no yog qhov uas peb cov qauv kev koom ua ke ntawm QSY them tawm. Koj tsis tuaj yeem sib nrauj cov txheej txheem casting los ntawm machining tom qab. Lub casting tej zaum yuav zoo li lub suab, tab sis yog tias nws muaj qhov tsis sib haum xeeb ntawm qhov tawv nqaij los yog cov shrinkage zais, nws yuav rhuav tshem cov cuab yeej thiab cov khoom seem ntawm CNC pem teb. Peb tsim cov txheej txheem casting nrog machining fixtures thiab thawj kov cov ntsiab lus hauv siab.
Nrog hlau casting, tshwj xeeb tshaj yog grey hlau, cov dawb graphite ua raws li cov roj nplua nyeem. Nws yog feem ntau machinable. Tab sis kev hloov pauv ntawm qhov txias txias thoob ib feem tuaj yeem ua rau thaj chaw ntawm cov hlau txias (dawb hlau) ntawm cov ntu nyias lossis ze ntawm qhov txias. Cov khoom ntawd yog ib qho nyuaj heev thiab abrasive. Peb ib zaug muaj ib pawg ntawm lub cev valve qhov twg lub flange, txias sai heev, tsim ib txheej chilled. Nws tau zom los ntawm carbide inserts hauv ib qho dhau. Txoj kev kho yog txheej txheem-sab: peb kho qhov kub thiab txias me ntsis thiab hloov kho cov molding chills los txhawb kom txias txias dua. Lub machining yield tau rov qab.
Rau ductile hlau, machinability yog zoo heev, tab sis cov nti yog txawv. Nws nyiam ua rau me me, tswj tau 6's thiab 9's ntau dua li cov hlua ntev. Tab sis koj xav tau cov cuab yeej zoo geometry thiab txheej txheej. Peb tus qauv tsim ntawm cov qib tshwj xeeb rau kev ntxhib thiab ua tiav cov hlau nrum thoob plaws peb lub tuam tsev CNC. Qhov sib xws ntawm cov khoom siv casting tuaj - ua tsaug rau kev tswj cov melting thiab inoculation - yog dab tsi tso cai rau peb kaw qhov ruaj khov machining tsis. Yog hais tias cov chemistry los yog microstructure sib txawv batch rau batch, koj cov kev pab cuam CNC ua ib qho kev sib ntaus sib tua ntawm kev hloov.
Material Nuances: Cov lus nug Alloying
Thaum cov cam khwb cia hlau npog 80% ntawm cov kev xav tau, qhov chaw tshwj xeeb alloy yog qhov txaus nyiam. Peb tab tom tham txog nickel-based lossis cobalt-based alloys nchuav rau hauv cov hlau-dominated matrices rau kev pabcuam huab. Tab sis qee zaum, koj tsuas yog xav tau ib qho yooj yim hlau nrog tweak. Silicon molybdenum irons rau siab kub stability, zoo li rau pa manifolds, yog ib qho piv txwv zoo.
Qhov kev sib tw nrog alloying hlau yog tswj kev sib cais. Cov alloying ntsiab muaj sib txawv affinities rau carbon, thiab lawv muaj peev xwm thawb lub graphite tsim nyob rau hauv txoj kev npaj txhij txog thaum solidification. Koj tsis tuaj yeem pov cov khoom rau hauv qhov cub xwb. Nws yog ib qho kev sib txuas ntxiv, nrog rau kev tswj xyuas qhov kub thiab txias. Peb khaws cov ntaub ntawv ntxaws ntxaws rau cov cua sov no - lub sijhawm, qhov kub thiab txias, kev txiav txim ntxiv, hom inoculant thiab tus nqi. Nws yog ib daim ntawv qhia ntau npaum li cov txheej txheem metallurgical.
Kuv nco qab tsim lub siab-silicon ductile hlau rau corrosive tshuaj twj tso kua mis daim ntawv thov. Lub silicon txhim kho corrosion kuj tab sis ua rau cov hlau ntau nkig thiab ua rau muaj kev ntxhov siab. Peb yuav tsum sib npaug nrog cov ntsiab lus npib tsib xee ntau dua kom tswj tau qee qhov toughness, thiab peb tau tsiv mus rau lub voj voog txuas ntxiv tom qab-casting los txo cov kev ntxhov siab. Txoj kev loj hlob coj peb iterations. Cov ntaub ntawv kawg tsis tawm ntawm daim ntawv txheem; nws yog qib proprietary yug los ntawm ib qho teeb meem tshwj xeeb. Qhov ntawd yog qhov twg hlau casting txav los ntawm cov khoom mus rau ib qho kev daws teeb meem.
Kev ua tau zoo yog txheej txheem, tsis yog kev tshuaj xyuas
Koj tsis tuaj yeem tshawb xyuas qhov zoo rau hauv qhov casting. Qhov no yog txoj kev ntseeg tseem ceeb. Rau cov hlau, nws pib nrog cov ntaub ntawv them nqi-cov khoom xa rov qab, npua hlau, seem hlau. Cov kab mob xws li txhuas lossis tin, txawm tias nyob rau hauv cov lej, tuaj yeem rhuav tshem cov qauv graphite hauv cov hlau nplaum. Peb tsim thiab cais meticulously.
Ces muaj cov txheej txheem tswj. Pouring kub yog qhov tseem ceeb, tab sis yog lub sijhawm ntawm kev kho thiab ncuav. Rau ductile hlau, magnesium fade yog tiag tiag. Yog tias koj tos ntev dhau lawm tom qab kev kho mob nodularizing, magnesium vapor poob nce, cov nodule suav poob, thiab koj yuav raug degenerate graphite. Peb muaj lub qhov rais nruj los ntawm kev kho mob mus rau qhov kawg pwm poured. Nws tau saib xyuas rau txhua qhov cua sov.
Kev sim tsis muaj kev puas tsuaj yog koj tus phooj ywg. Peb siv ultrasonic kuaj ntawm qhov tseem ceeb ntawm cov txheej txheem los saib rau shrinkage los yog inclusions. Tab sis qhov kev ntsuam xyuas tshaj plaws yog feem ntau yog ib qho yooj yim: txiav thiab ntsuas microstructure. Peb ua qhov no tsis tu ncua ntawm thawj ntu ntu thiab kev tshuaj xyuas tsis tu ncua. Saib ntawm graphite nodule duab, qhov loj me, thiab kev faib tawm nyob rau hauv lub tshuab tsom iav qhia koj ntau ntxiv txog kev noj qab haus huv ntawm cov txheej txheem tshaj li ib qho kev kuaj xyuas. Nws yog tus ntiv tes ntawm qhov tshwj xeeb yaj thiab ncuav. Tom qab 30 xyoo, koj tau txais kev xav rau nws. Koj tuaj yeem saib ntawm microstructure thiab yuav luag kwv yees qhov kub thiab txias thiab inoculation xyaum. Qhov ntawd yog qhov tsis muaj tseeb, qhov kev paub dhau los uas tsis muaj daim ntawv spec tuaj yeem ntes tau. Nws yog dab tsi tig txoj cai ntawm hlau casting los ntawm kev tsim cov kauj ruam mus rau ib qho khoom siv tes ua.
