Cobalt gami ba sa tanƙwara don buƙata-suna ayyana shi. Lokacin da famfunan ruwa na ruwa suna gudana a mashaya 400, lokacin da bawul ɗin ƙasa suna fuskantar 250 ° C da H₂S, ko kuma lokacin da shafts ɗin winch ke ɗaukar nauyin girgiza mai maimaitawa a cikin motocin injiniya na Arctic, daidaitaccen kayan gajiya. Rashin gazawa ba a hankali ba; suna da kwatsam, masu tsada, kuma suna da mahimmancin manufa. Mun ga gidaje guda uku na AMS 5387 cobalt alloy famfo gidaje sun fashe a cikin sa'o'in aiki 800 - ba daga kuskuren ƙira ba, amma daga rashin daidaituwar maganin zafi a cikin simintin simintin. Shi ya sa "6 cobalt alloy part" ba kawai kalmar bincike ba ne. Yana da ƙayyadaddun injiniyoyin gajerun hannu da ke amfani da shi lokacin da ba za a iya yin lahani ga kwanciyar hankali mai girma, daidaitaccen tsarin microstructural, da juriya ba.
Me Ya sa Shida-Ba Daya, Ba Goma ba—Sassan Alloy na Cobalt Suna Isar da Dogarorin Duniya na Gaskiya
Ƙungiyarmu ta ƙirƙira, gwadawa, da kuma tabbatar da filin akan abubuwan haɗin cobalt-nickel 17,000 tun daga 2018-mafi yawa AMS 5387 da T800 - don abokan ciniki a cikin ayyukan filayen mai, na'urorin lantarki na ruwa, da kuma matsa lamba na gwaji. Ba mu isa ga saiti guda shida ta hanyar haɗari ba. Kowannensu yana warware yanayin gazawar da muka gani a cikin dubban rahotannin sabis, bincike-binciken tushen tushen, da kuma nazarin faifai. Waɗannan ba mafita ba ne. An taurare su ta hanyar hawan keke na matsa lamba, gwajin girgizar zafi, da bayyanar lalata ta zahiri a cikin mahalli mai tsami.
- Cobalt alloy nozzles - An ƙera shi don allurar slurry mai lalata a cikin ɓangarorin da yawa. Madaidaitan nau'ikan bakin karfe sun lalata 3.2× cikin sauri a cikin gwaje-gwajen abrasion na lab (ASTM G65). Nozzles ɗin mu na T800 sun riƙe ± 0.015 mm juriyar juzu'i bayan zagayowar 12,000 a saurin gudu 15 m/s.
- Cobalt gami matosai - An yi amfani da shi azaman abin saka flange makafi a cikin kwas ɗin sarrafa teku. Inconel 718 da aka maye gurbin lokacin da abokan ciniki suka ba da rahoton gamuwa yayin tashin hankali a -1°C yanayin ruwan teku. Ƙarƙashin ƙima na Cobalt na juzu'i ya rage ƙarfin sakawa da kashi 41% ba tare da sadaukar da amincin hatimi ba.
- AMS 5387 cobalt alloy 6 famfo sassa - Maganin matakin-tsari: toshe silinda, farantin bawul, siliki, swashplate bushing, farantin tashar jiragen ruwa, da zobe mai riƙewa-duk daga zafin da aka tabbatar. Yana kawar da banbance-banbancen haɓakar zafi tsakanin filayen mating. Bayanan filin yana nuna 2.8 × tsawon ma'ana tsakanin gyare-gyare da gauran majalisu.
- Piston famfo Silinda gidaje - Ba kawai simintin gyaran kafa mai kauri ba. Waɗannan sun haɗa daidaitattun tashoshi masu sanyaya injina da flanges masu ɗaukar damuwa. Muna ɗaukar haƙurin GD&T mai ƙarfi fiye da ISO 2768-mK akan haɓakar haɓaka (≤0.008 mm sama da tsayin mm 320) saboda rashin daidaituwa kai tsaye yana haifar da sawar takalmin piston.
- Bawul ɗin matsa lamba tare da haɗaɗɗen kujerun cobalt - Taurin wurin zama ≥45 HRC, rashin ƙarfi na saman Ra ≤0.4 µm, da sifili porosity da aka tabbatar ta hanyar duban micro-CT. Ya ƙi kashi 98.3% na ɗanyen billet masu shigowa waɗanda suka gaza binciken ultrasonic—babu dama na biyu lokacin rufe hydrogen a mashaya 700.
- Kan jirgin winch cibiyar shaft rollers - Carburized T800 tare da zurfin akwati 1.2-1.5 mm, ainihin tauri> 85 J a -40 ° C. Ya tsira da juyar da lodi 15,000+ a cikin hanzarin gwajin fesa gishiri inda 42CrMo4 ya gaza a zagayowar 3,200.
Daidaiton Abun da Ba a Tattaunawa ba-Ga Yadda Muka Bamu Lamuni
Wasu masu samar da kayayyaki suna ɗaukar alloy ɗin cobalt a matsayin “wani ƙarfe ne kawai.” Muna ɗaukar shi azaman tsarin ƙarfe. AMS 5387 ba a siffanta shi ta hanyar ilmin sunadarai kaɗai ba - yana buƙatar kulawa mai ƙarfi akan rarraba girman hatsi, ilimin halittar carbide, da sauran yanayin damuwa bayan aikin injin. Muna samo asali ne kawai daga masana'anta tare da cikakken binciken ladle kuma muna buƙatar rahoton gwajin niƙa don kowane jigilar kaya. Kowane zafi yana jurewa tantancewar yanayi, gwajin juzu'i a kowane ASTM E8, da bita na ƙarfe kafin fara simintin gyare-gyare. Idan tari na carbide ya wuce kashi 5% na yanki a cikin simintin simintin simintin gyare-gyaren da aka yi amfani da shi, za mu kawar da duk kuri'a-ko da ilimin sunadarai ya wuce. Domin fashewar cikin sabis yana farawa daga can, ba a cikin taron ƙarshe ba.
Machining Ba Kawai Yanke Ba—Yana Sarrafa Zafi da Jijjiga
Cobalt alloys cire a 1/5 adadin 316 bakin karfe. Amma ainihin ƙalubalen ba gudu ba ne - kula da zafi ne. A 300 ° C, ƙarfin amfanin cobalt ya ragu kawai 12%. Wannan yana nufin yankan kayan aikin ya daɗe yana ɗaukar nauyi, yana haifar da ƙarin zafi, wanda ke sassauta kayan aikin a cikin gida kuma yana haɓaka lalacewa na kayan aiki. Muna amfani da cryogenic nitrogen sanyaya-ba hazo-a lokacin gama juya bawul kujeru. Rayuwar kayan aiki tana haɓaka 3.7 ×. Mutuncin saman yana inganta: babu samuwar farar-Layer, babu ƙananan microcracks da aka gano ta hanyar FIB-SEM. Kowane wuri mai mahimmanci yana samun ingantacciyar CMM * kafin * da * bayan * maganin zafi, saboda murdiya ba a iya tsinkaya ba - ana iya aunawa. Kuma muna rubuta shi.
Sashin Alloy ɗin ku na 6 na gaba yana farawa da Nazarin Zane-Ba Quote ba
Ba mu ba da RFQs don abubuwan haɗin cobalt ba. Mun fara da fassarar GD&T. Muna ba da alama masu yuwuwar damuwa a cikin canjin fillet. Muna ba da shawarar ƙananan tweaks na geometry-kamar canza wurin chamfer da 0.3 mm-wanda ke rage lokacin injina da kashi 22% ba tare da shafar aikin ba. Muna inganta kwararar abu a cikin simintin saka hannun jari ta amfani da simintin gyare-gyare, ba zato ba. Wannan ba a kan gaba ba ne. Yana da rigakafin haɗari. Abokan ciniki waɗanda suka tsallake wannan matakin matsakaicin 3.4 injiniyoyi suna canza umarni kowane aiki. Wadanda suka fara jigilar kayan aikin farko a cikin kwanaki 14, ba 38 ba.
Idan kuna ƙididdige ɓangaren cobalt alloy 6-ko kimanta ɗaya- kuna warware tsawon rayuwa a ƙarƙashin matsananci. Ba dacewa ba. Ba tsada kadai. Ba jagora lokacin kadai ba. Kuna buƙatar amincin juzu'i a zafin jiki, juriya na lalata a cikin kafofin watsa labarai masu tsauri, da tsinkayen tsari bayan dubunnan zagayowar. Wannan shine inda kwarewa ta hadu da kisa. Shi ya sa injiniyoyi ke ƙayyade cobalt-da kuma dalilin da ya sa suka amince da tsarin da ke bayansa.
