Lokacin da injiniyoyi suka ƙididdige bakin karfe don sarrafa ruwa mai mahimmancin manufa ko manyan kayan jujjuyawar sutura, ba kawai zaɓin juriya na lalata ba suke yin fare-suna yin fare akan kwanciyar hankali a ƙarƙashin hawan keke, amincin microstructural bayan machining, da sake maimaita tsari-zuwa-tsari a cikin kayan inji. Shi ya sa zabar dama bakin karfe allura gyare-gyare factory ba game da iya aiki ko farashi kadai ba. Yana da game da horo na ƙarfe, gano tsari, da ingantacciyar gogewa tare da sassan da suka gaza cikin bala'i idan porosity ya wuce 0.8% ko hazo carbide iyakar hatsi yana canzawa ta ko da 5 ° C yayin jiyya na zafi.
Me yasa MIM Bakin Karfe Ke Bukatar Fiye da Moda da Tanderu
Mun ga ayyuka da yawa sun tsaya tsayin daka-ba a bita na ƙira ba, amma a binciken labarin farko-saboda mai siyarwar ya kula da bakin karfe MIM kamar daidaitaccen ma'auni na 316L. Hanyoyin gazawar duniya ta ainihi suna ba da labarin: labarin yaƙe-yaƙe a cikin jikin bawul mai bangon bakin ciki bayan an gama; rashin daidaituwar taurin kan sandar fistan diamita 12-mm saboda rashin daidaituwar yaduwar carbon; rami mai zurfi a cikin gidajen famfo bayan awanni 48 na gwajin fesa gishiri saboda cire burbushin sulfur na hagu.
Bakin karfe MIM yana aiki ne kawai lokacin da yanayi guda uku suka daidaita: Na farko, albarkatun ƙasa dole ne su zama foda mai-atomized tare da O₂ ≤ 150 ppm da ilimin halittar jiki> 95% - ba gauraye-ɓoye na ruwa-atomized da aka siyar da su azaman "MIM-grade." Na biyu, ƙaddamarwa dole ne ya bi bayanin martabar yanayin zafi mai matakai da yawa wanda aka daidaita kowace kuri'a, ba ƙayyadadden jadawalin tanda ba. Na uku, sintering yana buƙatar vacuum ko tsaftataccen yanayi hydrogen tare da raɓa ≤ -60°C. Tsallake ɗaya, kuma kuna samun sassan da suka wuce cak na CMM amma karyewa a kashi 72% na ƙimar fashewa.
Shi ya sa muke ɗaukar kowane odar MIM ta bakin ƙarfe azaman kwangilar ƙarfe-ba aikin samarwa ba. Muna farawa da ingantattun foda har zuwa lambar batch ɗin narke, ingantacciyar ƙonawar ɗaure ta amfani da muryoyin TGA-DSC, da saka idanu yanayin tanderu a ainihin lokacin tare da ƙididdigar taro na quadrupole. Babu ware.
Inda Daidaitaccen Injiniya Ya Haɗu da Gaskiyar Masana'antu
Yawancin masana'antun MIM bakin karfe sun yi fice a lokuta na agogo ko kayan aikin hakori - sassan da ke ƙarƙashin 50g, ƙarancin damuwa, babu hatimin aiki. Amma aikace-aikacen masana'antu suna buƙatar ƙarin: bawul ɗin matsa lamba da ke aiki a mashaya 420, gidajen silinda tare da ± 5 µm mai da hankali a kan tsayin 200 mm, winch cibiyar shaft rollers dauke da 12-ton mai ƙarfi lodi. Waɗannan ba ƙalubalen lissafi ba ne. Su ne matsalolin halayen kayan aiki.
Mun isar da abubuwan haɗin MIM na bakin ƙarfe sama da 18,000 don tsarin na'ura mai ba da hanya tsakanin hanyoyin sadarwa inda zubar da ruwa ke nufin rufewar tsarin - kuma inda guda ɗaya da ya gaza AMS 5387 cobalt-alloy plug ya jawo $240k a cikin raguwar lokaci. Maganin mu? Haɓaka aiki. Muna gyare-gyaren hadaddun ginshiƙi na lissafi, sannan CNC-na'ura mai mahimmancin rufewa saman zuwa Ra 0.2 µm da latsa-daidaitattarar hannayen riga mai ɗaukar nauyi. Wannan ba sulhu ba ne - yana da madaidaicin shimfidawa.
Kayan aikin mu na yarda da ISO yana gudanar da sadaukar da layin MIM don 17-4PH, 420 bakin karfe, da maki biyu na al'ada-kowanne tare da sarrafa foda daban-daban, ajiyar kayan aiki, da murhun wuta. Babu cutarwa ta giciye. Babu masu ɗaure da aka raba. Kowane kuri'a yana samun cikakken tabbacin sinadarai ta hanyar OES, ma'aunin yawa, da gwajin juzu'i akan samfuran shaida waɗanda aka ja daga tire iri ɗaya kamar sassan samarwa.
Abin da Ka Samu A Haƙiƙa—Ba Abin da Aka Yi Alkawari kaɗai ba
- Abun ganowa: Takaddun shaida na foda, fayilolin log ɗin sintering, da rahotannin CMM da ke da alaƙa da ID ɗin kowane bangare ba kawai lambobi ba.
- Babu jurewa "misali".: Mun ambaci GD&T callouts a kowane fasali-misali, haƙurin matsayi na Ø0.05 mm don ramuka masu hawa, shimfidar 0.015 mm don rufe fuskokin-dangane da nazarin iya aiki na ainihi, ba tebur ɗin kasida ba.
- An haɗa ingantaccen aiki: Kowane oda yana jigilar kaya tare da bayanan gwajin hydrostatic (don sassan da ke ɗauke da matsi) da taswirorin tarkace-babu ƙarin caji
- Bayanin ƙira-don-MIM a cikin sa'o'i 48: Ba wai kawai “wannan bangon yayi sirari sosai ba”—amma ainihin ƙaramin kauri don ƙayyadaddun darajar ku, taswirar ɓoyayyiyar ɓarna, da wurin da aka ba da shawarar wurin ƙofa don guje wa layukan walda a cikin mahimman hanyoyin kwarara.
Ba mu bayar da sabis na "MIM-kawai" ko "machining-kawai". Muna bayarwa aiki-farko masana'antu. Idan bakin karfen ku yana buƙatar nau'ikan siffa-kusa-net da ingantattun kayan aikin injin, muna haɗa duka biyun-ba tare da ɓata lokaci ba, ba tare da asarar bayanai ba, ba tare da zargin ɗayan tsarin lokacin da wani abu ya ɓace ba.
Zabar Bayan Littafin
Tambayi kowane yuwuwar bakin karfe allura gyare-gyare factory wadannan tambayoyi guda uku-kuma kalli yadda suka amsa:
- "Nuna mani katakon tanderu uku na ƙarshe na 17-4PH. A ina aka sami karuwar iskar oxygen, kuma wane mataki aka ɗauka?"
- "Ku bi ni ta hanyar ƙa'idar cire ɗaurin ku don gidaje masu kauri mai kauri 3.2mm. Menene matsakaicin adadin dumama da kuka ƙyale ƙasa da 350°C-kuma me yasa?"
- "Idan zanenmu ya yi kira ga HRC 42-44 akan wurin zama marar bakin karfe 420, shin kuna cimma ta ta hanyar tsufa - ko kuna daidaita bayanin martaba kuma ku dogara ga hazo mai taurin kai kadai?"
Idan amsar ta kasance m, gama gari, ko nassoshi "matakan masana'antu" ba tare da ambaton ASTM B964 ko MPIF Standard 35 ba, ci gaba da dubawa. Madaidaicin bakin karfe MIM ba shi da daki don zato.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. yana gina sassan da ke rufe a 200°C, suna jujjuya ba tare da ɓata lokaci ba a 1500 RPM, kuma suna tsira da zagayowar matsa lamba 10,000 ba tare da ƙaddamar da microcrack ba. Muna yin ta ta hanyar kula da kowane gram na bakin ƙarfe foda a matsayin canjin ƙarfe-ba kayayyaki ba. Ziyarci https://www.tsingtaocnc.com don bitar takaddun fasaha, zazzage takaddun shaida, ko ƙaddamar da daidaitaccen ɓangaren ƙarfe na gaba don nazarin ƙira.
