Samar da ingantaccen foda na ƙarfe shine mataki na farko mai mahimmanci a cikin kowace masana'antar ƙarfe ta foda-kuma mafi ƙarancin hanyar haɗin yanar gizo na iya daidaita kowane tsari na ƙasa. A QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Mun sarrafa a kan 12,000 kg na cobalt-nickel da bakin karfe foda ga na'ura mai aiki da karfin ruwa bawul jikin, famfo gidaje, da kuma AMS 5387-compliant nozzles tun 2021. Abin da muka koya ba a cikin farkon kashi 7. kasawa a cikin sassan Alloy T800; abun ciki na danshi sama da 0.08% ya haifar da rami mai zafi yayin latsawar isostatic mai zafi; da rashin tantance sawun mai ba da kaya ya jinkirta binciken abokin ciniki guda uku. Samar da foda na gaske na duniya yana buƙatar fiye da kayan aiki - yana buƙatar horo na ƙarfe, ka'idoji masu maimaitawa, da rashin haƙuri don canzawa.
Atomization: Inda Chemistry ya hadu da Kinematics
Atomization na iskar gas ya kasance hanyar mu zuwa ga abubuwan haɗin gwiwa na tushen cobalt kamar T800 da AMS 5387-musamman lokacin da kwanciyar hankali a ƙarƙashin nauyin hydraulic 200 MPa ba zai yiwu ba. Muna amfani da nitrogen a matsa lamba 7.2 MPa da kusurwar 45 ° narke-rafi don cimma D50 = 28-32 μm tare da <5% girma (>106 μm) barbashi. Atomization na ruwa yana aiki don foda na ƙarfe na tsari (misali, SS316L don tushen famfo), amma bayan tsauraran bayanan atomization annealing a 950 ° C a cikin hydrogen don rage abun ciki na oxygen a ƙasa 0.15 wt%. Mahimmanci, ba za mu taɓa tsallake gwajin watsawa na ultrasonic ba kafin sieving: idan barbashi sun sake haɓaka cikin daƙiƙa 90 a cikin barasa na isopropyl, muna ƙin ƙuri'a-ko da binciken sieve ya wuce. Wannan shi ne saboda agglomerates karaya ba tare da annabta ba a lokacin compaction, haifar da yawa gradients cewa fara micro-cracks a lokacin sintering.
Tsarin Rotary Electrode: Don Lokacin da Ba za ku Iya Samun Oxides ba
Don nozzles na cobalt-nickel da ke aiki sama da 650 ° C a cikin kayan aikin mai da iskar gas, haɗaɗɗun oxide bala'i ne. Anan, sarrafa lantarki na rotary (REP) yana ba da abin da iskar gas ba zai iya ba: oxygen kusa da sifili (<0.02 wt%), ilimin halittar jiki, da sarrafa girman girman (D10–D90 tazara <1.8). Muna juyar da lantarki AMS 5387 a 12,500 rpm a cikin ɗakunan injin da aka gudanar a 1 × 10-2 mbar. Sakamakon foda yana gudana a 22 s / 50g (Hall Flowmeter), fakitoci zuwa 62% ƙarancin bayyane, da sinters zuwa> 99.2% ƙarancin ka'idar ba tare da HIP ba. Amma REP ba na duniya ba ne - muna guje wa shi don simintin ƙarfe da ke buƙatar rukunin yanar gizo na graphite. Madadin haka, muna amfani da ruwa-atomized Fe-2.5C foda tare da sarrafa carbon segregation, sa'an nan ƙara 0.8% flake graphite a lokacin hadawa don tabbatar da uniform graphite nodules bayan sinter-anneal.
Ƙofofi masu inganci: Babu Foda Bar Ba tare da Wucewa Duk Hudu ba
Muna tilasta wuraren bincike guda huɗu waɗanda ba za a iya sasantawa ba kafin kowane foda ya motsa zuwa gaurayawa:
- Tabbatar da sinadarai: ICP-OES a kan takaddun shaida (CRM NIST SRM 1262a don Co, CRM NIST SRM 3125a don Ni); sabawa> 0.15% yana haifar da cikakken gwaji
- Girman barbashi & siffa: Diffraction Laser (Malvern Mastersizer 3000) + Hoton SEM; rabon al'amari> 1.8 ko madauwari <0.7 ya hana
- Yawo & yawa: Hall Flowmeter + Scott Volumeter; Yawan kwararar ruwa dole ne ya zama 18-24 s/50g, yawan yawa 2.8-3.1 g/cm³
- Binciken gurɓatawa: Ferrography don tarkace lalacewa; Binciken XRF don Cr, Mo, ko Ti burbushi daga abubuwan da suka gabata
Muna shigar da kowane sakamako a cikin tsarinmu na ISO 9001-certified MES-tare da cikakken binciken abu zuwa lambar zafi mai ƙarancin kuzari. Idan rukuni ya gaza ko da kofa ɗaya, an narkar da shi-ba a rage daraja ba.
Me yasa "Mai inganci" yana nufin Bambancin Sarrafa, Ba Gudu ba
Wasu masana'antu suna bin ton a kowace awa. Muna bin daidaitattun sabani. A mu foda samar a foda metallurgy factory ayyuka, yadda ya dace yana nufin rike D50 bambancin zuwa ± 0.9 μm a cikin batches 10 a jere-ba yanke lokacin atomization da 12%. Me yasa? Saboda piston famfo Silinda gidaje machined daga foda tare da ± 3.2 μm D50 Bambance-bambancen ya nuna 22% mafi girman yawan ɗigogi a gwajin matsa lamba a mashaya 350. Muna saka hannun jari a cikin sa ido kan yanayin zafi na plasma na ainihi, sarrafa matsi mai rufaffiyar gas, da daidaita madaidaicin shaker mai sarrafa kansa kowane awa 4. ROI ba fitarwa cikin sauri ba - yana kawar da sake yin aiki akan kujerun bawul ɗin cobalt alloy $ 4,200.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. yana bi da foda ba a matsayin albarkatun kasa ba amma a matsayin tushen DNA na kowane bangare. Samar da foda a cikin masana'antar aikin ƙarfe na ƙarfe yana farawa tare da ingantaccen sinadarai na gami, yana ci gaba ta hanyar ingantaccen atomization, kuma yana ƙarewa kawai bayan ƙofofin inganci huɗu masu zaman kansu sun tabbatar da maimaitawa-ba sau ɗaya kawai ba, amma a cikin kowane kilogiram a cikin yawa. Wannan shine yadda bawul ɗin matsa lamba ke tsira rayuwar sabis na sa'o'i 15,000 a cikin famfunan ruwa na cikin teku. Wannan shine yadda winch center shaft rollers ke kula da gudu a ƙarƙashin 8 μm bayan zagayowar thermal 500. Nan gaba na masu samar da foda ne waɗanda ke auna nasara ba a cikin kilogiram a kowace motsi ba-amma a cikin microstructures a kowace micrometer.
