Thaum cov kws tsim khoom xav tau cov khoom siv hlau ua haujlwm siab uas tiv taus 30,000 psi hydraulic siab, tiv thaiv cov dej ntsev hauv cov twj tso kua mis, lossis tswj qhov kev ruaj ntseg tom qab 800 ° C kev kho cua sov-tus qauv machining lossis tuag casting feem ntau poob qis. Qhov ntawd yog qhov tseeb hlau txhaj molding txheej txheem Hoobkas khwv tau nws qhov chaw: tsis yog ib tug generic tsum, tab sis raws li ib tug kev koom tes txawj ntse nyob rau hauv lub physics ntawm nplua-grained microstructures, binder burnout kinetics, thiab sintering shrinkage them nyiaj.
Peb tau pom cov neeg siv khoom xa khoom MIM cov qauv nrog ± 0.3% linear kam rau ua - tsuas yog nrhiav tau thaum lub sijhawm kuaj ua haujlwm uas cobalt alloy nozzles warped nyob rau hauv thermal cycling. Lub hauv paus ua rau? Kev tswj tsis txaus ntawm qhov debinding ramp tus nqi thiab sintering cua dew point. Ntawm QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., txhua MIM ntau pib nrog AMS 5387 lossis T800 hmoov ntau daim ntawv pov thawj - tsis yog cov ntaub ntawv tensile xwb, tab sis cov ntsiab lus oxygen, particle loj faib (D50 ≤ 8.2 µm), thiab coj mus kuaj xyuas qhov ceev. Peb tsis lees txais cov khoom tawm sab nraud 4.2–4.4 g / cm³. Qhov no tsis yog overkill. Nws yog li cas peb tuav ± 0.05 hli ntawm 12-mm-inch piston twj tso kua mis lub tog raj kheej vaj tse bores tom qab sintering.
Feem ntau cov chaw ua haujlwm kho MIM li "hmoov + pwm + hluav taws." Peb kho nws raws li peb nruj ua ke kev qhuab qhia: rheology-tswj feedstock formulation, precision pwm kab noj hniav tsim calibrated rau anisotropic shrinkage, thiab huab cua-tswj sintering nrog real-time oxygen ib feem siab xyuas. Piv txwv li, peb cov cobalt-nickel alloy plugs yuav tsum muaj ob-theem sintering profile: 60 feeb ntawm 1150 ° C hauv 5% H₂-95% N₂ kom tshem tawm cov seem carbon, tom qab ntawd 90 feeb ntawm 1320 ° C hauv cov ntshiab hydrogen kom ua tiav> 99.2% ntom. Hla ob kauj ruam, thiab hardness poob los ntawm 42 HRC rau 36 HRC - txaus ua rau ntxov ntxov hnav nyob rau hauv high-cycle valve rooj. Peb teev txhua qhov parameter. Txhua batch nqa tag nrho traceability: hmoov ntau, binder ntau, pwm kab noj hniav ID, sintering rauv cheeb tsam, thiab CMM soj ntsuam daim ntawv qhia.
Vertical kev koom ua ke cais peb ntawm cov neeg ua haujlwm. Peb tsis outsource sintering. Peb tsis ua liaj ua teb kawg machining. Peb qhov chaw ua haujlwm ISO-raws li MIM nrog tsib-axis CNC machining, peev casting, thiab nqus cua sov kho-tag nrho hauv ib lub ru tsev. Thaum tus neeg siv khoom xa daim duab GD&T rau AMS 5387 twj tso kua mis nrog qhov tseeb txoj haujlwm hu rau ntawm yim Ø3.2 hli qhov txheeb ze rau Ø25 mm datum, peb tsis thov kom meej. Peb simulate toolpath-induced deflection, kho rau post-sintering distortion siv keeb kwm shrinkage maps, thiab siv lub teeb tiav-tig tsuas yog qhov tseem ceeb sealing nto thov Ra ≤ 0.4 µm. Tsis muaj rework. Tsis xav tsis thoob. Tsuas yog thawj-pass ua raws.
Kev xa tawm tiag tiag hauv ntiaj teb hinges ntawm qhov tshwm sim ua ntej txhaj tshuaj thawj zaug. Peb tau tshuaj xyuas ntau dua 1,200 MIM-npaj duab kos txij li xyoo 2020 - thiab pom peb qhov kev ua tsis tiav rov qab: kev txiav txim siab yuav tsum tau EDM sinker electrodes es tsis txhob siv cov pwm hlau, phab ntsa thickness hloov ntau tshaj 3: 1 piv (ua rau qhov sib txawv shrinkage), thiab qhov muag qhov muag tob dua 4 × txoj kab uas hla (traping binder). Peb pab pawg neeg ua haujlwm tau tshaj tawm cov no hauv kev tshuaj xyuas ua ntej-dawb-dawb-thiab qhia txog geometry tweaks uas txo tus nqi los ntawm 22% ntawm qhov nruab nrab. Ib tus neeg siv khoom hauv North American oilfield tau txo lub sij hawm ua cov hmoov txhuas los ntawm 14 lub lis piam mus rau 6.5 lub lis piam tom qab siv peb DFM tawm tswv yim voj.
Yog tias koj daim ntawv thov xav tau rov ua dua hla 5,000 units, metallurgical sib xws thoob plaws 20 batch, lossis kev ua haujlwm tau zoo tshaj ASTM B962, koj xav tau ntau tshaj li cov txheej txheem hlau txhaj tshuaj molding Hoobkas. Koj xav tau ib tus khub uas kho txhua gram ntawm cobalt alloy zoo li ntsuas ntsuas ntsuas-thiab ntsuas kev ua tiav tsis nyob hauv cov thawv xa khoom, tab sis hauv xoom teb tsis ua haujlwm tom qab 10,000 teev ua haujlwm. QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. tsim kom muaj tseeb rau hauv txhua kauj ruam txheej txheem. Tsis yog raws li kev xav. Raws li kev xyaum txhua hnub.
