Uma othile ebuza mayelana 'nezinhlobo ze-powder metallurgy,' impendulo esheshayo yencwadi yokufunda ngokuvamile iwuhlu oluhlanzekile: cindezela kanye ne-sinter, ukubumba umjovo wensimbi, ukucindezela okushisayo kwe-isostatic, nokunye. Kodwa empeleni, lokho kuhlukaniswa kucishe kuhlanzeke kakhulu. Igeja i-nuance yokuthi kungani ungakhetha enye esikhundleni kwenye ukuze uthole ingxenye ethile, kanye nokuyekelela komhlaba wangempela okuza nakho ngakunye. Ngibone imiklamo eminingi kakhulu ingena lapho ukukhetha kubonakala kusekelwe encazelweni yekhathalogi kunokuqonda okujulile kwezingqinamba zenqubo. Ake sikhulume ngokuthi lezi zinhlobo zisho ukuthini ngempela uma uzama ukwenza ingxenye esebenzayo, ehlala njalo, futhi engashayi isabelomali.
I-Workhorse: I-Conventional Press ne-Sinter
Yilapho abantu abaningi beqala khona, futhi ngesizathu esihle. Ibiza kakhulu emiqulwini ephezulu yomumo obulula. Uthatha i-powder yensimbi, ugcwalise i-die, uyicindezele ngaphansi kwengcindezi ephezulu, bese uyifaka esithandweni somlilo ukuze ubophe izinhlayiya. Isihluthulelo lapha 'silula uma kuqhathaniswa.' Ama-Undercuts? Khohlwa. Ukwehluka okubalulekile kokuqina kodonga? Ucela inkinga ngamagradients azovela ekusebenzeni.
Sake saba nephrojekthi yengxenye yegiya elincane. Umdwebo wawubukeka uphelele cindezela futhi sinter. Kodwa iklayenti lalinomsele obukhali, ojulile wendandatho yokugcina. Esigabeni se-sintering, leso sigaba esincanyana sasonteka. Kwadingeka sibuyele emuva futhi siklame kabusha imisele ibe indawo engaba mnene, eyayidinga ushintsho engxenyeni yokukhwelana. Yile mininingwane emincane engekho encwajaneni. Izakhiwo zemishini zihloniphekile, kodwa ziyi-anisotropic - ziqinile ngokuqondana nesiqondiso sabezindaba. Uma i-load case yakho ingahambisani nalokho, udinga ukwazi.
Ibanga lempahla lapha libanzi, kusukela kungxube ye-iron-copper-carbon yezingxenye eziyisisekelo zesakhiwo ukuya ezinsimbi ezine-alloy ephansi. Kodwa uma ungena ezicelweni zezinto ezifana nensimbi engagqwali yomshini wokunyathelisa kanye nengxenye ye-sinter, kufanele uqaphele. Umkhathi we-sintering udinga ukulawulwa ngokuqinile ukuze kuvinjelwe i-chromium oxidation, enezela izindleko. Kwesinye isikhathi, kunengqondo kakhulu ukuphakamisa okwehlukile i-powder metallurgy umzila noma inqubo yokukhiqiza ehlukile ngokuphelele.
Lapho Ubunkimbinkimbi bungaxoxiswana: Ukubumba Komjovo Wensimbi (MIM)
I-MIM iyimpendulo lapho ingxenye yakho ibukeka njengengxenye ebunjwe ngomjovo wepulasitiki kodwa idinga ukuba yinsimbi. Cabanga ngomumo oyinkimbinkimbi, omncane, oyinkimbinkimbi—abakaki abanezimbobo eziningi kuma-engeli angajwayelekile, imihlathi yezinsimbi zokuhlinza, izingxenye zokukhiya ezincane. Inqubo ihlanganisa impushana yensimbi ecolekileyo nesibophezelo se-polymer, umjovo uyawubumba, ubophe isibophezelo, bese uyasifaka. Uthola ukuminyana okuseduze nokugcwele kanye nokwethembeka komumo omuhle kakhulu.
Ukubanjwa? Kuwuchungechunge lwenqubo olude, olubucayi kakhulu. Isiteji sokubopha sibucayi futhi sihamba kancane; uyiphuthumise, bese uthola imifantu noma amabhamuza. Ukuncipha ngesikhathi sokucwiliswa kokugcina nakho kubalulekile futhi kuyabikezelwa, kodwa kufanele udizayine ithuluzi lesikhunta ukuze usinxephezele ngokunembile. Ngikhumbula inqwaba yezingxenye zokuxhuma lapho ithuluzi lasikwa khona ngokusekelwe kusici sokushwabana sangaphambi kwesikhathi, esicishe kancane. Konke ukugijima kuphume ngamaphesenti ambalwa amaphuzu angaphansi. Ayinamsebenzi. Isifundo bekuwukuthi ngaso sonke isikhathi, sebenzisa izivivinyo njalo ngempushana kanye ne-binder feedstock ohlela ukuyisebenzisela ukukhiqiza.
Ngokwezindleko, iphakeme ngengxenye ngayinye kunokucindezela kanye ne-sinter, kodwa ngohlelo olufanele, ayinakuhlulwa. Sitholele amaklayenti izingxenye ze-MIM adinga izimo eziyinkimbinkimbi, ezisebenza kahle kakhulu lapho ukukhanda kusuka kokuqinile kuzobiza kakhulu. Izinkampani ezifana I-Qingdao Qiangsenyuan Technology Co., Ltd.(QSY), ezinesizinda sazo esijulile ekusakazeni okunembayo nokwenza imishini, ngokuvamile zinikeza ukusebenza kwesibili okubalulekile ezingxenyeni ze-MIM, njengokunemba kwe-CNC ukulungisa indawo yedatha ebucayi ngemva kokushisa ukuze kufinyelele ukubekezelela inqubo ye-MIM iyodwa engenakukuqinisekisa.
I-High-Performance Arena: I-Hot Isostatic Pressing (HIP) kanye Nangaphandle
Lapha yilapho uya khona ukuze uthole izingxenye ezingakwazi ukuba ne-voids. Ngisho, i-zero porosity. Ama-aerospace turbine blades, izimila zezokwelapha ze-premium, uwoyela we-downhole obalulekile nezinto zegesi. I-HIP ingaphansi kwe-powder compact eyakhiwe ngaphambili (evame ukumbozwa esitsheni esivaliwe) ekushiseni okuphezulu kanye nokucindezela kwegesi ye-isostatic kusuka kuzo zonke izinhlangothi ngesikhathi esisodwa. Umphumela uba ukuminyene ngokuphelele, i-microstructure elinganayo.
Izindleko ziphakeme. Izisetshenziswa zibiza ngendlela emangalisayo ukuzithenga nokusebenza. Akuyona inqubo yevolumu ephezulu. Uyisebenzisela izinhlelo zokusebenza ezidingeka kakhulu. Indlela eyi-hybrid ethokozisayo isebenzisa i-HIP ukwelapha amaphutha angaphakathi ekulingiseni. Lena indawo lapho ubungcweti bezinto ezibonakalayo bomphakeli bubaluleke kakhulu. Isibonelo, ukusebenza ngama-alloys akhethekile afana nalawo asekelwe ku-nickel noma asekelwe ku-cobalt-okuvamile emsebenzini wokutshala izimali owenziwe amafemu afana ne-QSY (ungabona uhla lwazo lwempahla ku- https://www.tsingtaocnc.com) -idinga ulwazi olunembile lokuthi i-powder iziphatha kanjani phakathi nomjikelezo we-HIP ukugwema ukwakheka kwesigaba esingathandeki.
Ngale kwe-HIP, kunomhlaba wonke wezinhlobo ezisafufusa nezikhethekile. I-Spark Plasma Sintering yama-ceramics athuthukile nezinhlanganisela. Ukwenziwa okungeziwe kwezinsimbi, okuyi- layer-by-layer i-powder metallurgy. Kodwa nge-AM, uhweba ngengcindezi ye-isotropic ye-HIP ngokucindezeleka okushisayo kwe-laser noma i-electron beam. Indawo eyakhiwe njengokwakhiwa kanye nesimo sokucindezeleka kwangaphakathi izilo ezihluke ngokuphelele, ngokuvamile ezidinga inqubo yangemuva ye-HIP noma kunjalo ukuvala i-micro-porosity. Iwuhlobo oluhlukile oluhlukile futhi ithuluzi elisha ebhokisini lamathuluzi lokuhlanganisa impushana.
Indaba ingumlayezo
Awukwazi ukuhlukanisa uhlobo lwenqubo kokubalulekile. Ukukhuluma mayelana izinhlobo ze-powder metallurgy ngaphandle kokuxoxa ngempushana kufana nokukhuluma ngokupheka ngaphandle kokusho izithako. Impushana ye-athomu yamanzi ishibhile, ayifani, futhi ilungele umshini wokunyathelisa ne-sinter. Impushana ye-athomu yegesi iyindilinga, igeleza kangcono ku-MIM noma i-AM, kodwa ibiza kakhulu. Indlela ye-alloying nayo ibalulekile—ingabe usebenzisa impushana efakwe ngaphambili noma ukuxuba ama-elemental powders? I-pre-alloyed inikeza izakhiwo ezifanayo kodwa zibiza kakhulu. Ukuxutshwa kwe-elemental kungaholela e-inhomogeneity uma kungacutshungulwa kahle.
Sibe necala lokuhlaziya ukwehluleka engxenyeni yensimbi eqinisayo. Kwacaciswa isicelo sokugqokwa okuphezulu. Ingxenye yadlula i-QC yokuqala kodwa yehluleka ngaphambi kwesikhathi ensimini. I-Metallurgy ibonise izindawo zasendaweni ze-austenite egciniwe, ethambile. Imbangela? Ukuxutshwa okungaguquki kwesengezo segraphite (ikhabhoni) ne-base iron powder ngaphambi kokucindezela. Ngesikhathi sokushisa, ikhabhoni ayizange isakazeke ngokufanayo, ngakho-ke ezinye izindawo azizange ziqine ngendlela efanele. Ukulungiswa kwaba ukushintshela kwimpushana yensimbi eyakhiwe ngaphambili enekhabhoni eseyisixazululo. Inkinga ixazululiwe, kodwa ngokwenyuka kwezindleko zempahla ngo-15%. Yilolo hlobo lokuhwebelana okwenzeka nsuku zonke.
Yingakho ukubambisana ne-Foundry noma isitolo semishini esiqonda izinto ezisetshenziswayo kuleli zinga kubalulekile. Inkampani eneminyaka engama-30 ekulingeni nasekufakeni imishini, njenge-QSY, iletha lowo mqondo we-metallurgical. Kungenzeka ukuthi abayenzi impushana, kodwa bayazi ukuthi lezi zinto ezisetshenziswayo ziziphatha kanjani ngaphansi kokushisa nokucindezeleka okuvela emsebenzini wazo insimbi, insimbi, insimbi engagqwali, nama-alloys akhethekile. Lolo lwazi lwezinqubo ezinqamulayo lubalulekile uma ukhetha umzila we-PM futhi ulindele ukuthi ingxenye izokwenza kanjani i-post-sintering.
Ukuhlangana Nokukhiqiza Kwendabuko
Imigqa iyafiphala. Indlela ejwayeleke kakhulu manje yi-a i-powder metallurgy Inqubo yomumo oseduze nenetha elandelwa ukunemba kwemishini. Ungase u-MIM noma ucindezele futhi ucwilise ingxenye ibe ngu-95% womumo wayo wokugcina, bese uletha isigayo se-CNC ukuze umshini wokubhoboza okunembayo, izintambo, noma indawo ebucayi yokuvala. Le ndlela ye-hybrid ithuthukisa izindleko nokusebenza.
Ngisebenze kuma-valve emizimbeni lapho amaphaseji angaphakathi ayinkimbinkimbi amakhulu akhiwa nge-MIM, kodwa ubuso be-flange kanye nezimbobo zentambo bekungumshini we-CNC owenziwe nge-post-sintering. Bekuwukuphela kwendlela yokufeza ukuphela okudingekayo kwendawo kanye nokubekezelelana kwejometri kulezo zici ezithile. Umphakeli ohlinzeka ngobungcweti be-PM kanye nokwenza imishini yasendlini, njengoba kukhonjisiwe ekugxileni kwe-QSY ekubunjweni kwegobolondo, ukutshala imali, kanye nokwenza imishini ye-CNC, ubekwe kahle kulolu hlobo lwesixazululo sokukhiqiza esididiyelwe. Kwenza kube lula ukuxhumana nokuziphendulela.
Ngakho-ke, ukukhetha uhlobo lwe-PM akusona isinqumo esizimele. Yisinyathelo sokuqala ohlelweni lokukhiqiza. Kufanele ubuze: Yimiphi imisebenzi yesibili ezodingeka? Izoqedwa kanjani ingxenye? Igcotshiwe? Inqubo ye-sintering ithinta ikhemistri engaphezulu, engathinta ukunamathela kwe-plating noma ukusebenza kopende. Konke kuxhunyiwe. Ukucabanga ngakho njengokukhetha nje 'uhlobo' kumenyu iphutha elikhulu kakhulu ongalenza. Imayelana nobunjiniyela bochungechunge lokunikezela kanye nenqubo eletha ingxenye esebenzayo. Impushana iyisiqalo nje.
