Lokacin da injiniyoyi suka bayyana a Steelcasting Fondry factory, Ba wai kawai suna yin odar karfe ba - suna ƙaddamar da kwanciyar hankali a ƙarƙashin mashaya 300, amincin microstructure bayan hawan keke na zafi, da rashin haƙuri ga porosity a cikin manyan wuraren sawa. Mun ga jinkirin ayyuka da yawa saboda masu samar da simintin gyare-gyare sun ɗauki ƙarfe a matsayin "wani gami kawai." Ba haka ba ne. Ƙarƙashin ƙarfe mai ƙarancin ƙarfi yana fashe a ƙarƙashin saurin kashewa. Marasa maki kamar CF8M keɓance idan ƙima mai sanyaya ƙima ta ±5°C. Kuma sassan famfo na tushen cobalt-musamman AMS 5387 ko T800-suna buƙatar ci gaba da ƙarfe a kowane zafi, ba kawai yarda da takaddun takamaiman ba.
Me Yasa Karfe Ya Kasa Kasawa Kafin Mashin Ya Fara
Yawancin gazawar sun samo asali ne zuwa gibin da za a iya gujewa guda uku: Samar da kayan aiki ba tare da takaddun shaida ba, ƙirar ƙera yashi wanda ke yin watsi da ƙaƙƙarfan jagora a cikin gidaje masu kauri, da jadawalin maganin zafi waɗanda aka sake su daga ainihin juzu'i. A wurin aikinmu na Qingdao, muna gwada masu shigowa 316L Billlets don abun ciki na ferrite *kafin* zuba-ba bayan haka ba. Muna yin taswirar ma'aunin zafi a cikin ƙera yashi ta amfani da ma'aunin zafi da sanyio yayin zubar gwaji. Kuma ba za mu taɓa yin amfani da yanayin zafin rai ɗaya zuwa gidan famfo piston mai nauyin kilogiram 45 da jikin bawul ɗin matsa lamba mai nauyin kilogiram 2.3. Girma ɗaya bai dace da komai ba a daidaitaccen simintin ƙarfe.
Shi ya sa muke haɗa tsara tsarin simintin gyare-gyare kai tsaye cikin nazarin GD&T. Lokacin da abokin ciniki ya aika da zane don mahalli na bakin karfe na Silinda tare da ± 0.05 mm juriya na matsayi akan ramukan hawa shida, ba kawai mu faɗi machining ba. Muna tambaya: Ina gating yake shiga? Wadanne kwafin kwafi ne za su canza yayin shakeout? Nawa ne murdiya bayan simintin simintin gyaran kafa ke faruwa a 650°C? Waɗannan ba tambayoyin ka'ida ba ne. Ana auna su-akan simintin gyare-gyare na ainihi, tare da bayanan CMM da aka shigar akan saman CAD na asali.
Haɗin Kai Tsaye Wanda A Haƙiƙa yake Sarrafa Bambance-bambance
Fitar da fitar da simintin gyare-gyare, sannan injina, sannan gamawa yana haifar da ɓangarorin hannu guda uku-da dama guda uku don kuskuren tarawa. Mu Steelcasting Fondry factory yana gudanar da saka hannun jari da simintin yashi *a cikin ginin da aka tabbatar da ingancin ISO* inda cibiyoyin CNC ke aiki. Filogi na cobalt-nickel da aka jefa a 1,420°C yana motsawa kai tsaye zuwa kawar da damuwa, sannan zuwa milling-axis biyar-duk cikin awanni 48. Babu sufuri tsakanin kayan aiki. Babu sake gyarawa. Babu asarar bayanan datum.
Wannan ba dadi ba ne - sarrafa ilimin lissafi ne. Bambance-bambancen faɗaɗa zafin zafi tsakanin yashi mai ƙura, narkakkar ƙarfe, da faranti na injina an rage su lokacin da duk matakan ke faruwa a ƙarƙashin rufin ɗaya tare da sa ido kan muhalli. Muna bin yanayin zafi da zafin jiki na yanayi a kowane sa'a-ba don yana da "kyakkyawan aiki ba," amma saboda mun auna yadda 3% RH lilo ke canza lokacin bushewa don canza yanayin rashin ƙarfi akan fuskoki masu mahimmanci.
- CNC-machined karfe simintin gyare-gyare: ≤0.015 mm siffan sabawa a kan 300 mm spans
- Sand-cast carbon karfe (WCB): bambancin ƙarfin ƙarfi <± 8 MPa a fadin zafafan 10 a jere
- Bakin Simintin Zuba Jari (CF3M): Ra ≤1.6 µm as-simintin simintin gyare-gyare a kan filaye masu kwarara-babu niƙa na biyu da ake buƙata.
- AMS 5387 cobalt alloy: Cikakken yanayin zafi-zuwa-zafi, gami da narke log, nazarin yanayin, da tabbatar da girman hatsi ta ASTM E112
Ayyukan Duniya na Gaskiya, Ba Yarda da Takarda Kawai ba
Wasu masu ba da kaya suna jigilar simintin ƙarfe tare da "ISO 9001 bokan" wanda aka buga akan jerin tattarawa-amma ba za su iya samar da rahoton gwaji guda ɗaya wanda ke nuna bayanan taurin kai a kan tushen famfo mai kauri 120mm ba. Muna yi. Kowane jigilar kaya ya haɗa da rahoton gwajin kayan abu (MTR) tare da juzu'i, yawan amfanin ƙasa, haɓakawa, da ƙimar tasiri-wanda aka auna daga yanke takarda * daga simintin guda ɗaya *, ba daga wani shingen gwaji daban ba.
Mun kuma inganta aikin aiki kafin aikawa. Ba a bincika abin nadi na tsakiya na winch don diamita ba. Yana jujjuyawa a 1,200 rpm akan kayan aikin mu na ɗora-dynamometer yayin da ma'aunin ma'auni ke lura da jujjuyawar a wurare uku na radial. Gidajen bawul ɗin matsa lamba baya wuce gwajin hydrostatic a matsa lamba na 1.5 ×. Yana zagayawa sau 5,000 tare da simulated thermal shock-200°C zuwa 25°C a ƙasa da daƙiƙa 90—sannan ana duban rini-mai shiga. Idan ya tsage, muna sake tsara tsarin hawan-ba tsarin NDT ba.
Abin da za ku nema Daga Abokin Cinikin Karfe na ku
Kada ku daidaita don "mun jefa karfe." Tambayi maimakon:
- Shin za ku iya nuna mani rajistan ayyukan zafi guda uku na ƙarshe don wadatar ku ta ASTM A216 Grade WCB-kuma ku tabbatar da cewa an samo su daga injin niƙa na farko?
- Kuna kwaikwayi ƙarfi a cikin MAGMAsoft ko makamancin haka kafin amincewa da ƙirar ƙira?
- Ana yin bincikenku na ƙarshe akan na'urar CMM-ko tare da mitoci masu riƙe da hannu da go/no-go gages?
- Lokacin da simintin gyare-gyare ya kasa duban gani, shin kuna goge shi-ko yin bincike-binciken tushen tushen akan nau'in haɗawa, rarraba porosity gas, da tazarar hannu na dendrite?
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. amsa eh ga duka hudun. Ba kamar da'awar tallace-tallace ba-amma azaman matakan matakan aiki da aka rubuta, bayyane a cikin bayanan samarwa da kuma tabbatarwa yayin binciken abokin ciniki. Muna gina simintin gyare-gyaren karfe don tsarin injin ruwa wanda ke tafiyar da awoyi 18,000 ba tare da maye gurbin hatimi ba. Don famfunan mai da ke sarrafa ruwa mai ɗauke da H₂ a 120°C. Don injiniyoyin kayan aikin injiniya suna ɗaga nauyin ton 8.5 a cikin yanayin ƙananan sifili. Amincewa ba manufa ba ce. Yana da fitowar hanyoyin sarrafawa - aunawa, maimaitawa, tabbatarwa.
Idan tsarin simintin ƙarfe na gaba na ku yana buƙatar fiye da daidaituwar ƙima-idan yana buƙatar tsinkayar tsari, daidaiton ƙarfe, da ingantaccen aiki-fara da bayyananniyar tsari. Ba kasidu ba. Ba takaddun shaida kadai ba. Amma samun damar yin rajista na lokaci-lokaci, jadawalin maganin zafi, da rahotannin CMM. Haka a Steelcasting Fondry factory yana samun matsayinsa a cikin sarƙoƙi masu mahimmancin manufa.
