Uma uhlohla '17 4 investment casting' kubha yokusesha, cishe ufuna ichashazi lomlingo—ingxenye eqinile, imelana nokugqwala, neyinkimbinkimbi, konke ngentengo ehloniphekile. Iqiniso, kusuka ebhentshini lami, libi kakhulu. I-17-4 PH ingenasici iyinto enhle, kodwa ukuyimatanisa nenqubo yokutshala imali akuwona nje umsebenzi webhokisi lokuhlola. Ngibone imidwebo eminingi kakhulu lapho icaciswe khona nge-rote, ngaphandle kwengxoxo yangempela mayelana nesimo sokwelashwa kokushisa (H900, H1025, njll.) ukusakaza kwangemuva, okunquma ngokuyisisekelo izici zemishini ozitholayo. Yilapho ukunqanyulwa kuvame ukuqala khona.
Ukuheha kanye ne-Caveat esheshayo
Isithembiso asinakuphikwa. Ukutshala imali ikuvumela ukuthi ukhiqize lawo majeometri ayinkimbinkimbi, anomumo oseduze nenetha okungaba yiphupho elibi ukuwafaka umshini osuka esitokweni sebha, ikakhulukazi ezintweni eziqinile ezifana ne-17-4. Cabanga ngama-turbine blades, izingxenye zensimbi yokuhlinza, noma imizimba yamavalvu enephaseji yangaphakathi. Imfucuza incane, okubalulekile nge-alloy ebizayo.
Kodwa nansi i-hiccup yokuqala esebenzayo: i-fluidity. 17-4 esimweni sayo sokuncibilika ayigelezi njengo-304 noma 316. Uma idizayini inezingxenye ezincane kakhulu noma idinga ukugcwalisa isikhunta esinemininingwane eminingi, esithe chithi saka, ungase uhlangabezane nokungagijimi kahle noma ukuvala okubandayo. Sifunde lokhu kusenesikhathi ngenqwaba yama-sensor housings. I-wall spec bekungu-1.2mm, futhi saba nenani le-scrap elingu-50% kwaze kwaba yilapho siklama kabusha isistimu yokufaka isango futhi sakhuphula izinga lokushisa lokuthulula—owabe esethula isethi yawo yokukhathazeka kwesakhiwo sokusanhlamvu. Kuhlala kuyibhalansi.
Yilapho okuhlangenwe nakho kwe-Foundry kuba okungaxoxiswana khona. Isitolo esithela nje izimo ezilula ze-carbon steel singakhubeka kabi ngo-17-4. Udinga umlingani oqonda i-metallurgy, hhayi nje ukubumba. Ngibe nezingxoxo ezinhle namaqembu ezindaweni ezifana nalezi I-Qingdao Qiangsenyuan Technology Co., Ltd. (QSY). Ukugxila kwabo isikhathi eside ukutshala imali kanye nama-alloys akhethekile, njengoba kuphawulwe esizeni sabo tsngtaocnc.com, iphakamisa ukuthi bake bazulazula kulezi zinselele zezinto ezibonakalayo ngaphambilini, okuyingxenye yempi.
I-Post-Casting: Lapho I-PH Yenzeka Ngempela
Lena ingxenye enganakwa kakhulu kuma-RFQ. Awulingisi u-17-4 PH. Uphonsa i-17-4 i-stainless esimweni esinesixazululo. I-Precipitation Harding iza ngemuva. Ingxenye ye-as-cast ithambile futhi iyasebenziseka. Bese uyifudumeza uyiphathe ku-H-condition ethile.
Ukulawula okubalulekile ukufana kwezinga lokushisa kanye nomkhathi. Uma uhlose i-H900 ukuze uthole amandla amakhulu (cishe u-190 ksi tensile), ukuchezuka ngisho nokungu-25°F esithandweni kungaholela ebukhuni obungaguquguquki ngesikhathi sokukhiqiza. Sake saba nenqwaba yezingxenye zokuxhuma ze-aerospace ezahluleka i-QC ngoba i-thermocouple yesithando somlilo yayikhukhuleka; izingxenye ohlangothini olulodwa lwethreyi zahlangana ne-spec, ezinye azizange. Kwakuyisifundo esibizayo sokungacabangi ukuthi isilahlisi ukushisa sesikutholile konke.
Futhi machining ngemva kokuqina? Kuyenzeka kodwa kunzima. Uma udinga ukukhishwa kwensimbi okubalulekile, kwenze ku-post-cast yesimo se-annealed, bese uqinisa. Noma yikuphi ukuqedwa kokukhanya ngemva kokuqina kudinga amathuluzi e-ceramic noma e-CBN, futhi ubukele ukuguga kwamathuluzi njengoklebe. Imodeli yezindleko ishintsha ngokuphawulekayo ngokusekelwe kulolu chungechunge.
I-Dimensional Drift Ngesikhathi Sokwelashwa Kokushisa
Iphuzu elicashile eliluma abaklami: ukuqina kwemvula kubangela uguquko oluncane kakhulu, kodwa olubikezelwayo, lobukhulu. Akufani nokucisha insimbi ye-carbon, kodwa ikhona. Ngobukhulu obungu-100mm, ungase ubone ukushintsha kuka-0.05mm kuya ku-0.1mm. Uma ubekezelele okuthi +/-0.05mm kubhore ebucayi, kufanele uphendule ngalokhu. Manje sihlala sakha isici sokuncipha/sokukhula esiqondene nesimo sika-H edizayini yokufaka ukufa kwezici ezibalulekile. Ukuziba lokhu kusho ukuphela ngento e-in-spec kodwa enobukhulu obungaphandle kwe-spec.
Ukwehluleka Kwezwe Langempela Nokulungiswa
Ngikhumbula umsebenzi wokwenza ingxenye yasolwandle—impompi ekwazi ukumelana nokugqwala. I-spec yayingu-17-4 PH H1150 yenhlanganisela enhle yamandla nokumelana nokugqwala. Ama-castings abukeka emuhle, edlula i-X-ray, kodwa ahluleka ekuhloleni isifutho sikasawoti kusenesikhathi kakhulu kunalokho obekulindelwe.
Imbangela? Ukugqwala kwe-Intergranular. Ukuchayeka isikhathi eside ekwelapheni ukuguga okungu-1150°F, uma kungalawulwa kahle, kungabangela i-chromium carbides ukuthi ihle emingceleni yokusanhlamvu, kuqede i-chromium endaweni. Ukulungisa bekungashintshi into esetshenziswayo, kodwa ukulungisa umjikelezo wokwelashwa kokushisa nokuqinisekisa ukucisha ngokushesha ngemva kwesigaba sokukhipha isixazululo. Lokhu akuzona izinto zezincwadi; uhlobo lwe-nuance yenqubo oyifundayo ekusebenziseni izinkulungwane zezingxenye futhi ubone ukuthi yini ephukayo nokuthi kungani.
Leli inani lomphakeli elihlanganisa ukulingisa nokwenza imishini. Uma ibhizinisi elifanayo lilawula lonke uchungechunge lwenqubo ukusuka esikhunjeni ukuya engxenyeni eqediwe, njengama-QSY ahlanganisiwe ukutshala imali futhi CNC imishini ukunikela, ukuxazulula inkinga kuba inqubo evaliwe. Awusoli i-caster, bese kuba i-heater, bese kuba i-machinist. Impendulo iyashesha futhi iyasebenza.
Isetshenziswa Nini, Kufanele Uhambe Nini
Ngakho, '17 4 ukufakwa kwe-investimenti' kwenza umqondo nini? Okokuqala, lapho ubunkimbinkimbi buphezulu futhi izindleko zomshini ezivela kokuqinile zingaba zimbi kakhulu. Okwesibili, lapho udinga inhlanganisela yokumelana nokugqwala okumaphakathi namandla aphezulu engxenyeni efanayo. Okwesithathu, uma unevolumu yokuthethelela izindleko zamathuluzi esikhunta se-ceramic.
Kufanele ucabange nini kabusha? Ukuze uthole izimo ezilula-i-flange eyisisekelo noma ibha eqondile. Vele umshini. Kuzinhlelo zokusebenza ezidinga ukumelana nokugqwala ekugcineni endaweni enciphisa i-asidi, i-stainless ehlukile ingaba ngcono. Futhi ngesevisi yezinga lokushisa eliphezulu, khumbula ukuthi izimo ze-H zilahlekelwa amandla angaphezu kuka-600°F.
Kuyafaneleka futhi ukubuza ngamanye ama-alloys. Kwesinye isikhathi, i-duplex stainless stainless steel investment cast kanye nomshini ingase inikeze isilinganiso esingcono sezindleko/sokusebenza sohlelo lokusebenza. Unjiniyela omuhle uzoba nale ngxoxo nawe, kunokwamukela nje ukuphrinta.
I-Supplier Landscape kanye Nokubuka Kwe-Pragmatic
Imakethe igcwele izisekelo ezifuna amandla. Umehluko usengxoxweni yobuchwepheshe. Uma ngibheka isizinda somphakeli, iminyaka engu-30 embonini, njengoba i-QSY isho, izimpawu zokuthi cishe ziye zabhekana nezinto eziningi kanye nokuvela kwezinqubo. Kusho ukuthi kungenzeka babone amaphrojekthi ayi-17-4 asebenzile nalawo angazange asebenze.
Ukukhuluma kwabo ngokusebenza nabo ama-alloys asekelwe ku-cobalt futhi ama-alloys asekelwe ku-nickel ungummeleli omuhle. Uma bekwazi ukuphatha ukuthulula kanye nokulawula inqubo yalawo ma-superalloy, i-17-4 ingaphakathi kwe-wheelhouse yabo ye-metallurgical. Inselele imvamisa ihambisana nokuqhutshwa kokukhiqiza, hhayi ukwenza isampula elilodwa elihle.
Ekugcineni, ukucacisa '17 4 ukufakwa kwe-investimenti' kuyisiqalo sengxoxo, hhayi isiphetho. Ihlanganisa izinto ezinobuqili kanye nenqubo ebucayi. Impumelelo incike ekuqondeni lokho kuhlangana—izinselele zokungabi namanzi, isilawuli sokwelashwa kokushisa okungaxoxiswana ngaso, kanye namanuances of dimensional. Thola lobo budlelwano kanye nesitolo somsindo wezobuchwepheshe, futhi inqubo iletha izingxenye cishe okungenakwenzeka ukuzenza enye indlela. Kwenze iphutha, futhi usele ne-scrap ebiza kakhulu, eyinkimbinkimbi kakhulu.
