Lokacin da tsarin rufewa ke aiki ƙarƙashin matsananciyar matsa lamba, matsanancin zafi, ko bayyanar sinadarai mai tsauri, daidaitattun elastomers da bakin karfe suna kasawa da sauri. Injiniyoyin injiniyoyi a cikin na'ura mai aiki da karfin ruwa, mai & gas, da aikace-aikacen famfo mai nauyi suna ƙara juyowa Haynes 25 kayan hatimi factory abokan haɗin gwiwa-ba don gaskets-kan-shelf ba, amma don mahimmin manufa, hatimin injiniyoyi na al'ada waɗanda ke riƙe mutunci inda wasu ke fashe, oxidize, ko rarrafe.
Mun kawo kayan aikin hatimi na Haynes 25 (UNS R30025) tun daga 2018 - na farko don sake fasalin bawul na karkashin teku na Arewacin Amurka, sannan don tsarin winch abin hawa na injiniyan Turai yana gudana 24/7 a cikin yanayin yashi-hamada. Abin da muka koya ba na ka'ida ba ne: Haynes 25 ba kawai "lalata ba ne." Cobalt-nickel-chromium-molybdenum tushe yana bayarwa lokaci guda juriya ga sulfidation, carburization, da thermal gajiya-yayin da kiyaye yawan amfanin ƙasa sama da 690 MPa a 700 ° C. Wannan shine dalilin da ya sa ya maye gurbin Inconel 625 ko Waspaloy a cikin ɗakunan hatimi masu ƙarfi inda hawan keken zafi ya wuce hawan keke 300 a kowane motsi.
Amma ƙayyadaddun ƙayyadaddun kayan aiki suna nufin kaɗan ba tare da sarrafawa ba. Haynes 25 yana aiki da ƙarfi yayin aikin injin. Yanke guda ɗaya da aka katse na iya haifar da ƙaramar fashewa a cikin shimfidar ƙasa. Mun ga wannan da idon basira akan oda na cobalt alloy na AMS 5387-inda karkacewar saman 0.8 µm Ra kawai ya haifar da zubar da wuri a cikin babban injin gwajin famfo piston. Gyaran? Ba tighter tolerances. Yana canzawa daga juyi na al'ada zuwa ƙananan-RPM, babban madaidaicin CNC milling tare da sanyaya nitrogen na cryogenic-da kuma tabbatar da kowane bangare tare da aikin ƙarfe-tsalle-tsalle. Wannan shine bambanci tsakanin faɗin takamaiman takarda da kuma isar da amincin aiki.
- Ana fara gano kayan abu kafin yin simintin gyare-gyare: Kowane billet Haynes 25 yana ɗaukar cikakkun rahotannin da aka tabbatar da zafi a kowane ASTM B572, gami da girman hatsi (ASTM E112), gwajin lalata intergranular (ASTM A262 Practice A), da ingantaccen ingantaccen hangen nesa na walƙiya.
- Machining ba za a iya sasantawa baMuna amfani da injunan 5-axis DMG MORI tare da riƙon kayan aiki, lubrication tilastawa, da damping na ainihin lokaci - babu alamun zance, babu recast layers.
- Ana rufe maganin zafi a cikin tsari: Magani annealing a 1175°C ±10°C, bi da sauri ruwa quenching, ana yin a cikin gida a karkashin NADCAP-accredited tanderu — ba a taba fitar da waje.
- Geometry na hatimi yana bayyana aiki: Don hatimin fuska, mu injin tsangwama ya dace da ± 2.5 µm; don hatimin lebe na radial, muna sarrafa juriyar juriyar ƙasa zuwa ± 0.02 mm a cikin diamita na 300 mm.
Wasu suna ɗaukan hatiman Haynes 25 “tsada masu tsada ne kawai na Inconel 718.” Ba su ba. Inconel 718 ya yi fice a cikin ƙarfin juzu'i-amma ya gaza cikin bala'i wajen rage mahalli sulfur gama gari a haƙar iskar gas mai tsami. Abubuwan da ke cikin chromium na Haynes 25 (20-22%) da molybdenum (8-10%) suna haifar da barga, Layer oxide mai warkarwa da kansa wanda ke tsayayya da rami ko da a cikin adadin H₂ da ya wuce 100,000 ppm. Mun inganta wannan wurin tare da abokin ciniki na Kudu maso Gabashin Asiya: taron hatiminsu na baya na Inconel 625 ya dau tsawon sa'o'i 4,200 na aiki kafin gano ƙananan leak. Daidaitan Haynes 25 sun wuce sa'o'i 12,800 - tare da sifili mai girma wanda aka auna ta hanyar sake duba CMM bayan dawowar filin.
Wannan matakin amincewa ya fito ne daga haɗin kai tsaye-ba da'awar talla ba. Kayan aikin mu na Qingdao yana yin simintin gyare-gyare, injina, maganin zafi, da kuma bincika kowane ɓangaren hatimi na Haynes 25 a ƙarƙashin ISO 9001: 2015 da IATF 16949 mai tabbatar da rufin. Babu handoffs. Babu rashin daidaituwa. Lokacin da abokin ciniki ya aika GD&T-zane-zane masu nauyi don tsagi mara daidaitaccen silinda na ƙarshen hatimin hatimi, injiniyoyinmu ba kawai bincika haƙuri ba. Suna kwaikwayi rashin daidaituwar haɓakawar thermal tsakanin saka Haynes 25 da mahalli na ƙarfe na iyaye-sannan su daidaita tsangwama daidai daidai. Wannan shine yadda muke hana walda sanyi yayin taro kuma mu guje wa lalata-lalata yayin tashin hankali.
Farashin ya kasance abin damuwa na gaske-kuma haka ne daidai. Haynes 25 albarkatun kasa yana gudanar da 3.2 × farashin bakin 316. Amma farashin rayuwa yana ba da labari daban. Ɗaya daga cikin famfo OEM na Turai ya ƙididdige yawan kuɗin mallakar sama da shekaru biyar: $ 18,400 kowace hatimi da aka saita don daidaitattun allo (ciki har da lokacin raguwa, aiki, da sakewa), tare da $ 29,700 don Haynes 25. ROI su? An cim ma a cikin watanni 14-wanda kashi 92% ya haifar da ƙarancin rufewar da ba a shirya ba da da'awar garantin sifili da ke da alaƙa da gazawar hatimi. Wannan lissafin yana aiki ne kawai lokacin da naka Haynes 25 kayan hatimi factory yana ɗaukar ƙarfe a matsayin aikin injiniya-ba saye ba.
Neman gaba, buƙatu na canzawa daga madaidaitan hatimin flange zuwa ɗorawa mai ƙarfi, ɗimbin majalissar kayan masarufi-kamar zoben hatimi na Haynes 25 waɗanda aka haɗe da masu ɗaukar yumbu mai rufin yumbu don fafuna na tsakiya mai tsayi mai tsayi. Muna faɗaɗa R&D ɗin mu akan sigogin haɗin gwiwar watsawa da haɓaka ka'idojin wucewa na mallakar mallaka waɗanda ke tsawaita rayuwar sabis fiye da iyakokin Sashe na VIII na ASME BPVC na yanzu. Domin rufewa ba don dakatar da zubewa ba ne. Yana da game da ba da tabbacin ci gaba-lokacin da matsa lamba, hauhawar zafin jiki, ko sunadarai suka zama maƙiya. Kuma wannan yana farawa da sanin ainihin abin da ke faruwa da Haynes 25 a matakin micron, a ƙarƙashin kaya, a ainihin lokacin.
