Simintin gyare-gyaren ƙarfe mai launin toka yana isar da ɗorewa mara misaltuwa da ƙimar farashi don abubuwan masana'antu masu tsananin damuwa-musamman inda girgiza girgiza, juriya, da kwanciyar hankali na zafi suka fi mahimmanci. A QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Mun samar da sama da 12,000 launin toka simintin raka'a don na'ura mai aiki da karfin ruwa bawul bawul, famfo gidaje, da injiniyoyin abin hawa birki tun 2020. Kowane bangare ya hadu da ASTM A48 Class 30B m tensile ƙarfi (207ite sarrafa flake), tare da 207 MPa. A247-saboda rarraba flake mara daidaituwa yana haifar da fashe gajiya da wuri a cikin masu layin Silinda ƙarƙashin matsin lamba.
Me yasa Iron Grey Har yanzu Yayi Nasara A Inda Yake Kidaya
Wasu injiniyoyi suna ɗaukar baƙin ƙarfe ko ƙarfe dole ne su maye gurbin ƙarfe mai launin toka a aikace-aikace masu buƙata. Amma bayanai na zahiri suna ba da labari daban. A cikin binciken filin kwanan nan na gidaje 475 na piston famfo na silinda a ko'ina cikin jiragen ruwa na filin mai na Arewacin Amurka, nau'ikan ƙarfe mai launin toka sun daɗe da kashi 18% fiye da daidaitattun sassan ƙarfe a ƙarƙashin nauyin 3,000-psi iri ɗaya. Me yasa? Filayen graphite suna aiki azaman ginanniyar tafki mai lubrication yayin yanayin iyakoki-kuma suna ɗaukar kuzarin girgiza wanda in ba haka ba zai yaɗu zuwa maƙallan hawa da hatimi.
Muna ganin wannan kullun a cikin layin simintin yashi: lokacin da abokan ciniki suka canza daga ductile baƙin ƙarfe zuwa ASTM A159 G3000 baƙin ƙarfe mai launin toka don winch center shaft rollers, lokacin machining ya ragu da 22% saboda ƙananan taurin (187-229 HBW vs. 241-269 HBW) da kuma mafi girman halayen ɓarna. Wannan ba ka'ida ba ne - an auna shi akan Okuma MULTUS U3000 CNCs masu yawan axis yayin kammala aikin juyawa. Babu yunwa mai sanyi. Babu magana da kayan aiki. Daidaitaccen saman ya ƙare a Ra 1.6 µm.
Ƙarfin launin toka kuma yana magance matsalolin kula da zafi da sauran kayan ba za su iya ba. Tushen famfo da aka fallasa ga matsananciyar ruwan zafi (misali, 60°C zuwa 120°C a cikin zagayowar dakika 90) yana nuna 40% ƙarancin murdiya tare da baƙin ƙarfe mai launin toka tare da simintin ƙarfe 316. Dalili? Haɓaka haɓakar thermal mafi girma (50 W / m · K vs. 16 W / m · K) da ƙananan haɓakar haɓakar thermal (10.4 × 10⁻⁶ / ° C vs. 16 × 10⁻⁶ / ° C). Muna tabbatar da wannan ta amfani da infrared thermography yayin gwajin aiki-babu zato.
Ƙimar Ƙirar Ƙarfe na "Mai Rahusa" Grey Iron Castings
Ba duk baƙin ƙarfe mai launin toka ba ne ke yin iri ɗaya. Mun bincika maganganun masu ba da kayayyaki 31 don ASTM A48 Class 25 launin toka mai launin toka - kuma mun sami 68% gazawar ƙididdigar ƙarfe na asali. Batutuwa gama gari sun haɗa da wuce gona da iri na phosphorus (> 0.12%), abun cikin pearlite mara sarrafawa (<80% a cikin yankuna masu ɗaukar kaya), da sauran abubuwan ɗaukar magnesium daga zubowar baƙin ƙarfe na baya. Waɗannan kurakuran suna haifar da karyewar ƙarfi a farawa mai sanyi ko juzu'i bayan hawan zafi.
A QINGDAO QIANGSENYUAN, kowane baƙin ƙarfe narke mai launin toka yana farawa da ƙwararriyar ƙarfe mai ƙarancin fosphorus (≤0.05% P) da matatun hatsi na ferrosilicon. Muna riƙe daidai da carbon (CE) tsakanin 3.7-4.1 don daidaita ruwa da ƙarfi-ba mu taɓa bin matsakaicin lambobi masu ƙarfi ba a cikin kuɗin injina. Tanderun mu yana bin diddigin sulfur, manganese, da adadin sanyaya a ainihin lokacin. Idan CE ta wuce ± 0.05, za mu kawar da zafi-ba mu rage shi ba.
Wannan horo yana biya. Abokan ciniki sun ba da rahoton gazawar filin sifili akan sassan famfo na ƙarfe na ƙarfe na AMS 5387 masu jituwa sama da watanni 42 na ci gaba da aiki a dandamalin tekun kudu maso gabashin Asiya. Juriya na lalata ba ta atomatik ba-amma ƙananan tsarin mu na sarrafawa yana tsayayya da fashewar damuwa na sulfide fiye da nau'ikan tushe na gama-gari.
Lokacin Zaɓan Iron Grey akan Madadin
Zaɓi simintin ƙarfe mai launin toka lokacin da aikace-aikacenku ya buƙaci:
- Damping vibration - mahimmanci ga sansanonin kwampreso, gidaje masu rage kayan aiki, da firam ɗin gwaji
- Fuskokin lalacewa masu shafan kai - manufa don ganguna, faranti, da kuma hanyoyin jagora na zamiya
- Kwanciyar kwanciyar hankali a ƙarƙashin hawan keken zafi - an tabbatar da shi a cikin tubalan injuna, manyan abubuwan shaye-shaye, da muryoyin musayar zafi
- Samar da matsakaicin girma mai ƙima - farashin kayan aiki na baƙin ƙarfe yana gudana 30-50% ƙasa da simintin saka hannun jari don sassa> 5 kg
Guji baƙin ƙarfe mai launin toka kawai lokacin da ake buƙatar ƙarfin tasiri na ƙarshe (misali, haƙoran haƙoran hako) ko lokacin da fallasa ya wuce 500°C ci gaba. Don komai - gami da bawul ɗin matsa lamba da aka ƙididdige su zuwa 10,000 psi, gidajen silinda na silinda na piston tare da juriya na 0.025 mm, da injin injin injin abin hawa mai ɗaukar nauyi mai nauyin ton 80- ƙarfe mai launin toka ya kasance zaɓin injiniya.
Haɗin kai na Haƙiƙa yana farawa da Haɗin Kan Abu
Zaɓin simintin ƙarfe mai launin toka bai kamata ya zama zaɓi tsakanin farashi da aiki ba. A QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., muna ɗaukar zaɓin abu azaman aikin injiniya na haɗin gwiwa-ba siyayya ba. Ƙungiyarmu ta sake duba kiran GD&T kafin a faɗi, tana ba da tutoci yuwuwar haɗarin raguwa a cikin sassan bangon bakin ciki, kuma tana tabbatar da kwatancen kwatancen ƙira a kan ainihin gwajin zub da jini. Ba mu kawai jigilar simintin gyare-gyare ba—muna isar da ingantattun ƙayyadaddun ƙayyadaddun ƙayyadaddun bayanai, daftarin ganowa zuwa lambar zafi, da rahotanni masu girma da masu sa ido na CMM suka sa hannu.
Ga abokan cinikin da ke ƙayyadadden simintin ƙarfe na baƙin ƙarfe, muna ba da shawarar farawa da tambayoyi uku: Menene babban yanayin rashin nasara a ƙirar ku ta yanzu? Wadanne filaye ne ke ɗaukar nauyi da waɗanda ke buƙatar hatimi? Kuma ta yaya thermal gradients za su rarraba a ko'ina cikin sashin yayin aiki? Amsa waɗannan-kuma za mu daidaita ku da madaidaicin maki, hanyar sarrafawa, da ka'idar dubawa.
Simintin gyare-gyaren ƙarfe ba fasaha ce ta gado ba. Su ne ainihin ingantattun ingantattun hanyoyin da aka tace sama da shekaru 150-kuma har yanzu suna ci gaba. A wurin mu na yarda da ISO a cikin Qingdao, kowane zube yana ci gaba da wannan juyin halitta. Domin dorewa ba kawai game da ƙarfi ba ne. Yana da game da tsinkaya. Daidaitawa. Sarrafa.
