Amacandelo amashishini asebenza kakhulu awaphumeleli kuyilo olubi-ayasilela xa ukuziphatha kwezinto eziphathekayo, ukulawulwa kobukhulu, kunye neendlela zomthwalo osebenzayo zingahambi kakuhle. Yiyo loo nto ikhokela inkqubo ye-hydraulic ye-OEMs, izihlanganisi zezixhobo ze-oyile, kunye nabavelisi bempompo ezichanekileyo besiya begqitha kubunjwa okuqhelekileyo okanye ukwenziwa kwebar-stock machining. ipowder metallurgy steel factory izisombululo-ingakumbi xa iinxalenye zifuna> 1200 MPa amandla okuqina, ukunxiba ukuxhathisa kwi-500 ° C, okanye i-zero porosity kwiindawo ezixinzelelekileyo zoxinzelelo.
Siye sabona kuqala: umakhi wepompo waseYurophu wathatha indawo yezindlu ze-sand-cast cylinder kunye ne-PM-processed 4605 steel stainless-kwaye wasika ukungaphumeleli kwentsimi nge-73% kwiinyanga ze-18. Ngoba? Akunjalo ngenxa yokuba i-metallurgy yomgubo "intsha," kodwa ngenxa yokuba ihambisa ukufana kwe-microstructural akukho nkqubo isekwe kwingot inokuhambelana. Imida yengqolowa ihlala ilungile kwaye isotropic. Ukuhanjiswa kweCarbide kuhlala kulawulwa. Kwaye ukushwabana? Kuqikelelwa ukuba ngaphakathi kwe-±0.02 mm-nakwi-320-mm-diameter yezindlu ezinamatshaneli okupholisa angaphakathi kunye ne-0.8-µm Ra umphezulu ogqityiweyo.
Elo nqanaba lokungaguquguquki lifuna okungaphezulu nje komatshini wokushicilela kunye ne-sinter. Ifuna ukudityaniswa ngokuthe nkqo kuzo zonke iileya ezintathu ezingenakuxoxisana: i-powder eluhlaza eqinisekisiweyo, i-loop evaliweyo yokulawula inkqubo ye-thermal-mechanical, kunye nokuqinisekiswa kwe-metrology-backed-backed-not nje ekuhlolweni kokugqibela, kodwa kwinqanaba ngalinye ukusuka kwimephu yoxinaniso oluluhlaza ukuya kwi-HIP emva konyango. E-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., oku akuyothiyori. Indawo yabo ehambelana ne-ISO eQingdao iqhuba imveliso yentsimbi ye-PM epheleleyo-ukusuka kwi-gas-atomized pre-alloyed powders (umzekelo, i-PH13-8Mo, i-Custom 465®, kunye ne-AMS 5387-ehambelana ne-cobalt-steel hybrids) ngokusebenzisa i-compaction efudumeleyo, i-vacuum sintering kunye ne-conducting enye ye-CNCHI uphahla.
Nantsi into eyahlula indlela yabo kwiivenkile eziqhelekileyo "ze-PM-ekwaziyo":
- Ukulandeleka kwezinto kuqala ngaphambi kokuba umgubo ungene kwi-hopper: Yonke ibhetshi ithwala i-CoA epheleleyo kunye nohlalutyo lwe-OES + LECO, kunye nokuqinisekiswa kwe-SEM / EDS yomxholo we-oxide kunye nokusabalalisa ubungakanani be-particle (D10 / D50 / D90 efakwe kwi-ASTM B822).
- Inxalenye eluhlaza ingqibelelo iyalinganiswa-ayicingelwa: In-line CT scanning iqinisekisa ingxinano gradients phambi sintering; ezinxaxhileyo >±0.05 g/cm³ zixhokonxa ulungelelwaniso lwenkqubo oluzenzekelayo, hayi ukusebenza kwakhona ngesandla.
- I-Sinter-HIP ayilandelelanisi-i-synergistic: Isithando somlilo sawo esinamagumbi amabini sisebenzisa uxinzelelo lwenitrogen elawulwayo ngexesha lokuntywila, emva koko utshintshe ngokuthe ngqo kwi-argon HIP kwi-1150 ° C / 150 MPa-ukuphelisa umngcipheko we-oxidation kunye nokwenza uxinaniso olusondeleyo lwethiyori (99.8% TD) kwiijometri ezintsonkothileyo njengemizimba yevalve ye-multi-port.
- Uzinzo lweDimensional luyinjineli-aluhlawulelwanga: Basebenzisa i-annealing yokunciphisa uxinzelelo *emva* kwe-HIP kodwa *phambi kokuba* kugqitywe ukwenziwa, besebenzisa iiprofayili zexesha lobushushu eziqinisekisiweyo ngokuchasene nesalela sokwenza imaphu yoxinzelelo (XRD + ukomba umngxuma). Isiphumo: Iphepha lokulwa lihlala ngaphantsi kwe-0.015 mm kwimikhono yentonga ye-piston engama-200-mm-nasemva kwe-3-axis milling yokutywina i-grooves kunye namazibuko e-radial.
Abanye banokuthi i-PM yentsimbi ixabisa ngaphezulu kunotyalo-mali. Kodwa xa silandelela iindleko ezipheleleyo zobunini bezindlu ze-valve ye-Tier-1 ye-hydraulic valve (ASTM F2997 Grade 3), indlela ye-PM yazisa i-22% yeendleko zokuphila eziphantsi-kungekhona kwizinto ezingabizi kakhulu, kodwa ukusuka kwi-scrap echithiweyo (imveliso yokuphosa: 68%; isivuno se-PM: 94%), ukunciphisa imisebenzi yesibini (akukho kususwa kwesango, akukho nkonzo ye-MTB eyandisiweyo kunye nokulungiswa kwe-20 ye-weld ye-8), Iiyure ze-14,600 kwiirigi zokuvavanya iibhayisikile eziphezulu).
I-bottleneck yangempela ayiyona iteknoloji-kukusebenzisa ukusetyenziswa kakuhle. Sisafumana iminxeba ngeveki evela kwiinjineli ezibuza: "Ngaba i-PM ingaphatha i-1200-bar yethu yoxinzelelo spike?" okanye "Ngaba i-T800-based PM igcina ubulukhuni emva kwe-nitriding?" Impendulo ixhomekeke ngaphantsi kwepowder kunye nangaphezulu malunga nendlela eqinile ngayo yonke ikhonkco-ukusuka ekukhethweni kwe-powder morphology ukuya kwinqanaba le-HIP ye-ramp-ihambelana nemvulophu yakho esebenzayo. Umzekelo: umgubo ongqukuva unika ingxinano eluhlaza ngcono kodwa impompozeke kancinci kumacandelo anodonga olucekethekileyo; amasuntswana angaqhelekanga aphucula ukuzaliswa kodwa anyuse imingcipheko yokukhupha amandla. Akukho luhlu olucacileyo lwehlabathi. Kukho imephu yenkqubo yolwazi kuphela.
Kungenxa yoko le nto i-QINGDAO QIANGSENYUAN ifakela ii-metallurgists-hayi nje ukuthengisa abathengisi-kwinqanaba lokuqala lophononongo lobunjineli. Baza kuhlaba umkhosi kwiingxabano ze-GD&T ngaphambi kokuba kuqale isixhobo (umzekelo, ukucacisa ukunyamezela iprofayile kwindawo ene-sintered endaweni ye-callouts yesikhundla ecinga uzinzo lwedatum). Baza kucebisa ulandelelwano lonyango lobushushu olungqiniweyo kwi-AMS 5387 elinganayo-hayi imijikelo ye-generic "stainless steel". Kwaye baya kubelana ngeengxelo ze-CMM eziluhlaza, iilogi ze-HIP, kunye nemifanekiso ye-metallography-kungekhona nje ukudlula / ukuhluleka kwezitampu.
Ukujonga phambili, olona tshintsho lunamandla alubhekiseli kumgubo ocolekileyo okanye uxinzelelo oluphezulu-kuya kubukrelekrele bokwenza umxube. Cinga: ii-sintered cores ezinemihlaba yokutywinwa ngoomatshini, izindlu eziphathwe nge-HIP ezineegeji zoxinzelelo ezigxininisiweyo, okanye iibhilithi ze-PM-forged ezifumana ukulinganisa ukuqinisa ulwalathiso ngaphambi kokuba ucofe kuqala. Ezi ayizizo iingqikelelo ze-R&D. Ziiprojekthi eziphilayo eziqhuba namhlanje kumaziko afana ne-QINGDAO QIANGSENYUAN's-apho isakhono sefektri yesinyithi somgubo wesinyithi sidibana noqeqesho oluchanekileyo, hayi njengeenkonzo ezahlukeneyo, kodwa njengesiphumo sobunjineli esinye.
Ukuba i-valve yakho elandelayo yoxinzelelo oluphezulu, i-winch shaft, okanye indlu yepompo kufuneka ihambise ukusebenza okuphindaphindiweyo-kungekhona nje ukuhlangabezana nomzobo-awukhethi umthengisi. Ukhetha iqabane lenkqubo elinobungqongqo besinyithi obuhambelana neprofayile yakho yomngcipheko wokusebenza. Oko kuqala ngokubuza imibuzo efanelekileyo-kungekhona ngexabiso ngekhilogram, kodwa malunga nokuphindaphinda kobuninzi obuluhlaza, iirekhodi zokuqinisekisa umjikelezo we-HIP, kunye nendlela abaphatha ngayo umxholo we-oksijini ongaphandle kwe-oxygen kwi-powder engenayo. Ngenxa yokuba kwizicelo ezibalulekileyo zemishini, umda wempazamo uhlala kwi-microstructure-hayi incwadana yokuthengisa.
