Sintering ntawm hmoov metallurgy Hoobkas kev lag luam tsis yog ib kauj ruam kawg - nws yog lub sij hawm ua-los yog-tawg rau ib feem ntawm kev ncaj ncees, seem stability, thiab kev ua tau zoo mus sij hawm ntev nyob rau hauv high-stress applications. Ntawm QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., peb tau sintered tshaj 12,000 pawg ntawm cobalt-nickel alloy compacts txij thaum 2018-feem ntau AMS 5387 thiab T800-qib cov ntaub ntawv destined rau hydraulic twj tso kua mis vaj tse, siab valve rooj zaum, thiab winch center. Qhov peb kawm tsis yog hauv phau ntawv. Nws tshwm sim los ntawm cov cav tov rau hauv cub tawg, kev soj ntsuam microstructure, thiab rov ua cov hauv paus-ua rau kev soj ntsuam thaum qhov ceev poob 0.3% ntawm 1,185 ° C los yog cov qoob loo loj hlob spiked thaum lub sij hawm nitrogen-diluted txias.
Temperature Profile Control Tsis-Tshaj-Tshwj xeeb rau Superalloys
Feem ntau qhov ua tsis tiav hauv sintering ntawm hmoov metallurgy Hoobkas kab rov qab mus rau thermal lag - tsis txwv cov khoom siv. A 15 ° C sib txawv nyob rau hauv ncov tuav lub sij hawm hloov AMS 5387 lub intergranular theem faib txaus los txiav qaug zog lub neej los ntawm 37% nyob rau hauv piston twj tso kua mis lub tog raj kheej vaj tse. Peb siv dual-zone molybdenum-rhuab rauv nrog lub sij hawm tiag tiag thermocouple tawm tswv yim ntawm peb txoj haujlwm radial ib qho load. Qhov kev pom tseem ceeb: ramp tus nqi qis dua 3 ° C / min hauv qab 600 ° C tiv thaiv binder decomposition blowouts; saum toj no 900 ° C, peb tuav rau 45 feeb - tsis yog 60 - kom tsis txhob muaj ntau tshaj cobalt diffusion thaum tswj ≥98.2% theoretical ntom. Qhov no tsis yog txoj kev xav. Nws yog qhov profile uas dhau ASTM B243 tensile validation ntawm 92 ntau sib law liag.
Atmosphere Purity Directly Dictates Surface Integrity—thiab Machinability
Cov ntsiab lus hydrogen tseem ceeb tshaj li cov pa roj tag nrho. Peb saib xyuas H₂ dew point tsis tu ncua - tsis yog qhov kev nkag siab xwb. Ib tus neeg siv khoom cobalt alloy nozzles pom micro-pitting tom qab kev kho cua sov. Kev tshawb nrhiav pom cov dej nkag ntawm hydrogen ntawm 99.99% purity-tab sis dew point ntawm -42 ° C qhia cov kab dej vapor uas oxidized npib tsib xee-nplua nuj lis ciam teb thaum sintering. Kev daws: ntxiv cryogenic ntxiab thiab zawm cov lwg taw tes rau -65 ° C. Qhov tshwm sim: nto roughness (Ra) poob ntawm 1.8 µm mus rau 0.6 µm ua ntej machining, txiav CNC lub sij hawm voj voog los ntawm 22%. Rau hlau castings thiab stainless hlau Cheebtsam, peb hloov mus rau dissociated ammonia nrog <5 ppm O₂—tuaj xyuas ib teev ntawm zirconia sensor. Tsis muaj kev zam.
Load Geometry thiab Green Density yuav tsum tau sib npaug - Tsis yog qhov siab tshaj plaws
Ntau dua ntsuab ntom suab zoo dua-kom txog thaum distortion hits. Peb cap ntsuab ntom ntawm 62-65% rau T800-raws li qhov ntev tshaj 120 hli. Vim li cas? Vim tias qhov tsis sib xws ntawm qhov sib txawv ntawm cov contours-zoo li cov hauv engineering tsheb winch shafts-ua rau 0.18 hli hneev hauv 300 hli ntev yog tias ntsuab ntom ntau tshaj 66%. Peb kho: segmented loading tais nrog graded txhawb pins. Cov ntu nyias zaum ntawm cov khoom siv hluav taws xob uas tsis tshua muaj siab; tuab cov hauv paus so ntawm high-conductivity silicon carbide pads. Shrinkage variation poob ntawm ± 0.32% rau ± 0.07%. Cov nyiaj tshwj xeeb: cov khoom siv hluav taws xob tau nce 18% vim tias peb tshem tawm tom qab sinter straightening.
Lub Sijhawm Saib Xyuas Lub Sijhawm Ua Si Tomqab Kev Tshawb Fawb Txhua Lub Sijhawm
Peb tsis tso siab rau cov qauv ntsuas qhov ntom ntom tom qab ib pawg ntawm lub siab valve lub cev ua tsis tiav kev sim hydrostatic ntawm 410 bar - txawm tias dhau CMM tshuaj xyuas. Cov hauv paus hauv paus: qhov chaw porosity nyob ze ntawm lub radii sab hauv tsis nco qab los ntawm ib qho kev ntsuas Archimedes. Tam sim no txhua txhua sintering khiav pub cov ntaub ntawv rau hauv peb tus tswv SinterTrack system: thermocouple arrays teev 120 ntsiab lus rau ib qho load; loj poob sensors ntes binder burnout tiav nyob rau hauv ± 0.8 vib nas this; infrared koob yees duab daim ntawv qhia nto emissivity hloov qhia thaum ntxov grain coalescence. Cov lus ceeb toom ua rau tsis siv neeg tuav-thiab-tshuaj xyuas yog tias ib qho parameter deviates dhau qhov kev cai tswj hwm kev txwv-xws li cov khoom siv qib, tsis yog rau qhov cub. Qhov no txo qis qhov tsis sib haum xeeb los ntawm 1.4% rau 0.23% hauv 18 lub hlis.
Optimization tsis yog hais txog ib qho Parameter-Nws yog hais txog kev txiav txim siab cuam tshuam
Sintering ntawm hmoov metallurgy Hoobkas kev vam meej hinges nyob rau hauv qhov chaw, qhov kub thiab txias, lub sij hawm, thiab ib feem geometry sib cuam tshuam - tsis yog li cas ib leeg ua. Qhov kub siab tshaj 5 ° C txhim kho qhov ntom ntom tab sis ua rau lub ntsej muag oxidation tsis zoo tshwj tsis yog hydrogen purity nruj ib txhij. Kev ua kom txias sai dua txhim kho hardness tab sis caw cov microcracks tshwj tsis yog tias ntsuab ntom ntom me ntsis. Ntawm QINGDAO QIANGSENYUAN, peb kho sintering raws li lub kaw-voj kaw lus: cov ntaub ntawv hmoov ntau (particle loj D50, cov ntsiab lus oxygen, ntws tus nqi) ncaj qha kho qhov cub setpoints ua ntej loading. Peb muab cov laj thawj no - tsis yog cov txiaj ntsig - nrog cov neeg siv khoom thaum GD&T tshuaj xyuas. Vim tias thaum koj lub twj tso kua mis yuav tsum muaj sia nyob 20,000 cycles ntawm 350 bar, sintering tsis raug tsim. Nws yog metallurgical daim ntawv cog lus ua tiav.
