Sintering of powder metallurgy fakitale si sitepe yomaliza - ndi nthawi yodzipangira kapena yopuma kuti mukhale ndi kukhulupirika, kukhazikika kwa mawonekedwe, komanso kugwira ntchito kwanthawi yayitali pamapulogalamu opsinjika kwambiri. Ku QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., tadutsa magulu 12,000 a aloyi acobalt-nickel compacts kuyambira 2018-makamaka AMS 5387 ndi T800-giredi zida zopangira nyumba zopangira ma hydraulic, mipando yapakati ya valve, shaft yopambana. Zomwe tidaphunzira sizinali m'mabuku. Zinatuluka kuchokera ku zipika za ng'anjo, ma scans a microstructure, ndi kusanthula mobwerezabwereza zomwe zimayambitsa mizu pamene kachulukidwe katsika ndi 0.3% pa 1,185 ° C kapena kukula kwa njere kunakwera panthawi yoziziritsa ndi nayitrogeni.
Kuwongolera Mbiri Yakutentha Sikukambitsirana—Makamaka kwa Superalloys
Zolephera zambiri pakuwotcha mizere ya fakitale ya zitsulo zamafuta zimabwereranso kunthawi yotentha - osati malire a zida. Kupatuka kwa 15°C pa nthawi yogwira ntchito kwambiri kumasintha gawo la AMS 5387 la intergranular kuti lichepetse moyo wa kutopa ndi 37% mu nyumba za silinda za pampu ya piston. Timagwiritsa ntchito ng'anjo zapawiri-zone molybdenum zokhala ndi mayankho anthawi yeniyeni a thermocouple pamalo atatu ozungulira ponyamula. Kuzindikira kofunikira: mitengo yotsika pansi pa 3 ° C / min pansi pa 600 ° C imalepheretsa kuwola kwa binder; pamwamba pa 900 ° C, timagwira kwa mphindi 45-osati 60-kupewa kufalikira kwa cobalt mopitirira muyeso pamene tikusunga ≥98.2% kachulukidwe kamaganizo. Izi si chiphunzitso. Ndi mbiri yomwe idadutsa ASTM B243 kutsimikizika kokhazikika pamaere 92 motsatizana.
Atmosphere Purity Imatsogoza Chikhulupiriro Chapadziko Lonse-ndi Kuchita Zinthu
Zomwe zili ndi haidrojeni ndizofunikira kwambiri kuposa kuchuluka kwa gasi. Timayang'anira H₂ mame mosalekeza, osati kungoyang'ana pakamwa. Makasitomala amodzi amtundu wa cobalt alloy nozzles adawonetsa micro-pitting pambuyo pa chithandizo cha kutentha. Kafukufuku adawonetsa kuti haidrojeni yolowera pa 99.99% yoyera - koma mame pa -42 ° C adayambitsa nthunzi yamadzi yomwe idatulutsa malire ambewu ya nickel panthawi yotentha. Yankho: onjezerani misampha ya cryogenic ndi kumangirira mame kufika -65 ° C. Zotsatira: kuuma kwapamtunda (Ra) kutsika kuchoka pa 1.8 µm kufika ku 0.6 µm kupanga chisanadze, kudula nthawi yozungulira CNC ndi 22%. Pazitsulo zachitsulo ndi zitsulo zosapanga dzimbiri, timasinthira ku ammonia osagwirizana nawo <5 ppm O₂- amatsimikiziridwa ola lililonse kudzera pa sensa ya zirconia. Palibe kuchotserapo.
Katundu wa Geometry ndi Kachulukidwe Wobiriwira Ziyenera Kufananizidwa—Osachulukitsidwa
Kuchulukana kobiriwira kokwera kumamveka bwinoko-mpaka kusokoneza kugunda. Timayika kachulukidwe wobiriwira pa 62-65% pazigawo za T800 zotalikirapo kuposa 120 mm. Chifukwa chiyani? Chifukwa kutsika kosiyana m'mizere yovuta kwambiri, monga momwe mumapangira ma winch shafts - kumayambitsa uta wa 0.18 mm mu utali wa 300 mm ngati kachulukidwe kobiriwira kamaposa 66%. Kukonzekera kwathu: ma tray otengera magawo okhala ndi zikhomo zothandizidwa. Magawo owonda amakhala pamiyala ya ceramic yosakanizidwa pang'ono; Maziko okhuthala amakhala pamapadi a silicon carbide apamwamba kwambiri. Kusintha kwa shrinkage kwatsika kuchoka pa ± 0.32% mpaka ± 0.07%. Bonasi: kutulutsa kwa ng'anjo kunakwera 18% chifukwa tidachotsa kuwongola pambuyo pa sinter.
Kuyang'anira Nthawi Yeniyeni Kumapambana Kuyang'ana Pambuyo pa Ntchito Nthawi Zonse
Tinasiya kudalira ma cheke otengera kachulukidwe kachulukidwe pambuyo poti gulu la ma valve opanikizika litalephera kuyesa kwa hydrostatic pa bar 410-ngakhale kudutsa CMM kuyendera. Choyambitsa: porosity yokhazikika pafupi ndi radiyo yamkati yomwe idaphonya ndi muyeso wa Archimedes wa nsonga imodzi. Tsopano sintering run iliyonse imadyetsa deta mu dongosolo lathu la SinterTrack: thermocouple arrays log 120 points pa katundu; masensa otaya kwambiri amazindikira kutha kwa binder mkati mwa masekondi ± 0.8; Makamera a infrared mapu pamwamba pa emissivity akuwonetsa kugwirizana koyambirira kwambewu. Zidziwitso zimachititsa kuti zitsimikizidwenso ngati chizindikiro chilichonse chipatuka kupyola malire ovomerezeka ovomerezeka - owerengeredwa pagiredi lazinthu, osati ng'anjo iliyonse. Izi zidachepetsa maere osagwirizana kuchokera pa 1.4% mpaka 0.23% m'miyezi 18.
Kukhathamiritsa Sikuti Ndi Parameter Imodzi-Ndizokhudza Kusokoneza zisankho
Kupambana kwa fakitale ya powder metallurgy kumadalira momwe mpweya, kutentha, nthawi, ndi gawo la geometry zimayendera - osati momwe aliyense amachitira yekha. Kutentha kwapamwamba kwa 5 ° C kumapangitsa kachulukidwe koma kumawonjezera oxidation pamtunda pokhapokha kuyera kwa haidrojeni kumangika nthawi imodzi. Kuzizira kofulumira kumapangitsa kuuma koma kumayitanitsa ma microcracks pokhapokha kachulukidwe kobiriwira katsika pang'ono. Ku QINGDAO QIANGSENYUAN, timachita sintering ngati njira yotseka: data yolowera ufa (tinthu tating'ono D50, okhutira ndi okosijeni, kuchuluka kwa otaya) imasintha mwachindunji magawo ang'anjo asanayambe kutsitsa. Timagawana mfundo iyi, osati zotsatira zokha, ndi makasitomala panthawi yowunikira GD&T. Chifukwa pamene nyumba yanu yopopera iyenera kupulumuka maulendo 20,000 pa bar 350, sintering sikupanga. Ndi kukwaniritsidwa kwa mgwirizano wazitsulo.
