Sintering na foda karafa ayyukan masana'anta ba mataki na karshe-yana da yin-ko-karya lokacin ga sashe mutunci, girma girma, da kuma dogon lokaci yi a high-danniya aikace-aikace. A QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Mun sintered a kan 12,000 batches na cobalt-nickel gami compacts tun 2018-mafi yawa AMS 5387 da T800-sa kayan ƙaddara ga na'ura mai aiki da karfin ruwa famfo gidaje, matsa lamba bawul wuraren shaft, da winch. Abin da muka koya bai kasance a cikin littattafan karatu ba. Ya fito ne daga rajistan ayyukan tanderu, sikanin microstructure, da maimaita binciken tushen tushen lokacin da yawa ya ragu da kashi 0.3% a 1,185°C ko girmar hatsi da aka tsiro yayin sanyayawar nitrogen-diluted.
Sarrafa Bayanan Bayanin Zazzabi Ba Ne Tattaunawa ba-Musamman na Superalloys
Yawancin gazawar da aka samu a cikin layukan masana'anta na foda na ƙarfe na ƙarfe suna komawa zuwa lagwar thermal - ba iyakokin kayan aiki ba. Bambancin 15°C a cikin mafi girman lokacin yana canza AMS 5387's intergranular lokaci rarraba isa don yanke rayuwar gajiya da kashi 37% a cikin gidajen silinda na piston famfo. Muna amfani da tanderu mai zafi na molybdenum mai yanki biyu tare da ra'ayoyin thermocouple na ainihi a wurare radial uku a kowane kaya. Hankali mai mahimmanci: ƙimar hawan ƙasa da ƙasa 3°C/min ƙasa da 600°C yana hana fashewar fashewar ɗaure; sama da 900°C, muna riƙe na mintuna 45-ba 60 ba—don guje wa yawan yaɗuwar cobalt yayin da muke riƙe ≥98.2% ƙimar ƙa'idar. Wannan ba ka'idar ba ce. Bayanin bayanan martaba ne wanda ya wuce ingancin tensile na ASTM B243 akan kuri'a 92 a jere.
Tsaftar Yanayi Kai tsaye Yana Ƙarfafa Mutuncin Sama-da Machinability
Abubuwan da ke cikin hydrogen sun fi yawan kwararar iskar gas. Muna saka idanu akan raɓar H₂ ci gaba-ba kawai maida hankali ba. Cobalt gami nozzles na abokin ciniki ɗaya ya nuna ƙaramin rami bayan maganin zafi. Bincike ya nuna mai shigar da hydrogen a 99.99% tsarki - amma maki a -42 ° C ya gabatar da tururin ruwa wanda ya haifar da iyakokin hatsi na nickel yayin sintering. Magani: ƙara tarko na cryogenic da matsananciyar raɓa zuwa -65 ° C. Sakamako: Rashin ƙarfi (Ra) ya ragu daga 1.8 µm zuwa 0.6 µm pre-machining, yanke lokacin sake zagayowar CNC da 22%. Don simintin gyare-gyaren ƙarfe da kayan aikin bakin karfe, muna canzawa zuwa ammoniya da ba ta da alaƙa da ita <5 ppm O₂ - an tabbatar da shi kowane awa ta hanyar firikwensin zirconia. Babu ware.
Load Geometry da Green Density Dole ne a Daidaita—Ba Maƙasudi ba
Mafi girma koren yawa yana sauti mafi kyau - har sai murdiya ta kama. Muna ɗaukar nauyin kore a 62-65% don sassan tushen T800 fiye da 120 mm. Me yasa? Saboda rashin daidaituwa a tsakanin hadaddun kwantena-kamar waɗanda ke cikin ƙwanƙolin abin hawa na injiniya - yana haifar da baka 0.18 mm a cikin tsayin mm 300 idan ƙarancin kore ya wuce 66%. Gyaran mu: tirelolin lodi masu rarrafe tare da filaye masu goyan baya. Sassan bakin ciki suna zaune a kan matakan yumbu masu ƙarancin juriya; sansanonin kauri suna hutawa akan fatun siliki carbide masu ƙarfi. Bambancin raguwa ya ragu daga ± 0.32% zuwa ± 0.07%. Bonus: Abubuwan da aka samar da wutar lantarki ya karu da kashi 18% saboda mun kawar da daidaitawar bayan-sinter.
Sa Ido na Gaskiya Yana Buga Binciken Bayan Tsari Kowane Lokaci
Mun dakatar da dogaro da gwajin ƙima na tushen samfur bayan rukunin bawul ɗin matsa lamba sun gaza gwajin hydrostatic a mashaya 410-duk da wucewar binciken CMM. Tushen tushen: ƙayyadaddun porosity kusa da radiyoyin ciki da aka rasa ta ma'aunin Archimedes mai aya ɗaya. Yanzu kowane gudu na sintering yana ciyar da bayanai cikin tsarin SinterTrack na mallakarmu: ma'aunin thermocouple log maki 120 kowace kaya; Na'urori masu asara yawan jama'a suna gano ƙarshen ƙonawa a cikin ± 0.8 seconds; kyamarorin infrared taswirar sauye-sauyen isar da saƙon da ke nuni da gaɓar ƙwayar hatsi da wuri. Faɗakarwa suna haifar da riƙe-da-bita ta atomatik idan kowane siga ya ɓata fiye da ingantattun iyakoki na ƙididdiga - ƙididdige kowane darajar abu, ba ta tanderu ba. Wannan ya rage kuri'a marasa daidaituwa daga 1.4% zuwa 0.23% a cikin watanni 18.
Ingantawa Ba Game da Siga ɗaya ba ne—Game da Hukunce-hukuncen Cuta
Cire nasarar masana'antar ƙarfe ta foda ya dogara ne akan yadda yanayi, zafin jiki, lokaci, da ɓangaren lissafi ke hulɗa da juna-ba yadda kowanne ke yin shi kaɗai ba. Matsakaicin zafin jiki na 5°C yana inganta yawa amma yana daɗaɗa iskar oxygen da iska sai dai idan tsaftar hydrogen ta ƙarfafa lokaci guda. Saurin sanyaya yana inganta taurin amma yana gayyatar microcracks sai dai idan yawan kore ya faɗi kaɗan. A QINGDAO QIANGSENYUAN, muna bi da sintering a matsayin tsarin rufaffiyar madauki: bayanan foda mai shigowa mai yawa (girman barbashi D50, abun ciki na oxygen, ƙimar kwarara) kai tsaye yana daidaita madaidaicin tanderun kafin kaya. Muna raba wannan dabaru - ba kawai sakamako ba - tare da abokan ciniki yayin nazarin GD&T. Domin lokacin da gidan famfo dole ne ya tsira 20,000 hawan keke a mashaya 350, sintering ba masana'anta bane. Cika kwangilar ƙarfe ne.
