Simintin ƙarfe na ƙarfe yana ba da juriya mara misaltuwa, ƙarfin zafin jiki, da kwanciyar hankali mai girma-idan an yi daidai. Amma injiniyoyi da yawa sun gano latti cewa ba duk simintin ƙarfe ba ne ke yin daidai da matsi, lalacewa, ko kayan zafi na keke. Mun ga gidaje na bawul na hydraulic suna fashe a mashaya 280 bayan zagayowar 12,000 - ba daga kurakuran ƙira ba, amma daga tazarar dendritic mara daidaituwa a cikin simintin simintin gyare-gyare. Wasu kuma suna kokawa tare da ingantattun injina akan jikin bututun silinda na AISI 316, inda ragowar damuwa daga rashin daidaituwar sanyaya ke haifar da murdiya yayin niƙa ta ƙarshe. Waɗannan ba haɗari ba ne na ka'idar. Sune gazawar da za a iya maimaita su da suka samo asali a cikin gibin sarrafa tsari: rarrabuwar gami, bambancin danshi, ko rashin isassun jiyya mai zafi bayan jefar.
Me Yasa Bakin Karfe Ya Bukaci Fiye da Narkewa da Zubawa kawai
Bakin karfe ba abu ɗaya ba ne - dangi ne da ke faɗin austenitic (304, 316), duplex (2205, 2507), martensitic (410, 420), da hazo-hardening maki (17-4PH). Kowannensu yana nuna hali daban yayin ƙarfafawa. Austenitic karfe suna ciyar da kyau amma suna raguwa a hankali; Duplex maki suna da ƙarfi a matakai biyu, suna buƙatar daidaitattun ƙimar sanyaya don guje wa ɓarna lokacin sigma. Bambancin 0.3% a cikin chromium ko abun ciki na nickel na iya canza ma'auni na ferrite-austenite-da kuma daidaita walƙiya ko juriya a cikin mahallin chloride.
Binciken gazawar duniya na ainihi yana nuna tushen tushe guda uku masu maimaitawa: Na farko, rashin isassun iskar gas yana haifar da microporosity ƙarƙashin saman injina-musamman mai matsala a jikin bawul ɗin matsa lamba na bakin ciki inda matsa lamba dole ne ya wuce mashaya 400. Na biyu, bazuwar ƙera yashi yana haifar da ɗaukar carbon a fatar simintin, yana rage juriyar lalata gida a cikin sassa 316 da aka fallasa ga gas mai tsami. Na uku, rashin daidaituwa tsakanin dendritic tazara yana ƙara mai sauƙi ga yage mai zafi yayin ƙarfafawa, musamman a cikin hadaddun geometries kamar gidaje na piston famfo Silinda tare da haɗaɗɗun tashoshi masu sanyaya.
Muna inganta kowane tsari ta amfani da bincike-bincike kafin zubawa da sashe na ƙarfe bayan simintin. Don sassa masu mahimmanci-kamar AMS 5387 cobalt-alloy pump housings-muna bin tazarar hannun dendrite (DAS) ta hanyar hoto na SEM. DAS a ƙarƙashin 35 µm yana daidaita kai tsaye tare da tsawan rayuwar gajiya fiye da zagayowar 10⁷. Wannan matakin sarrafawa yana raba simintin gyare-gyaren aiki daga masu mahimmancin manufa.
Daga Foundry Floor zuwa Ayyukan Aiki: Matakan Tsari mara Sassauta
Yawancin ƙayyadaddun bayanai suna tsayawa a haɗar sinadarai da ƙarfin ɗaure. Amma aikin yana dogara ne akan abin da ke faruwa tsakanin waɗannan wuraren binciken. Ga abin da muke tilasta wa kowane oda na simintin bakin karfe:
- Raw kayan ganowa: Tabbataccen zafi kawai-babu gauraye tarkace. Kowane kuri'a yana ɗaukar cikakkun rahotannin gwajin niƙa tare da girman hatsi, ƙimar haɗawa (ASTM E45), da ma'aunin delta-ferrite.
- Sarrafa daidaitaccen iko: Yashi molds kiyaye a ≤2.5% danshi; An tabbatar da kauri harsashi na saka hannun jari tare da ma'auni na yanzu kafin dewaxing.
- Ƙaddamar da kai tsaye: Mold daidaitawa da kuma ɗorawa saitin da aka inganta ta amfani da simintin MAGMASOFT® don kawar da raguwar layin tsakiya a cikin sassa masu kauri.
- Gudanar da thermal bayan simintin gyare-gyare: Maganin annealing da aka gudanar a cikin ± 5 ° C na ƙayyadaddun zafin jiki, tare da lokacin jiƙa da aka ƙididdige kowane kauri na sashe-ba kowane nauyin sashi ba.
- Tsayawa mai girma: Rage damuwa kafin yin aiki mai tsauri, sannan tabbatarwar CMM a yanayin 20°C tare da kunna ramuwar zafi.
Tsallake kowane mataki yana haifar da haɗari a sakamakon ƙasa. Abokin ciniki ɗaya ya rage gazawar filin a cikin tushe na famfo na teku da kashi 92% bayan mun ƙara warware matsalar tilas - duk da cewa ainihin ƙayyadaddun bayanansu sun tsallake. Bambancin? Matakan damuwa na saura sun ragu daga 210 MPa zuwa ƙasa da 35 MPa.
Lokacin da Casting ya Haɗu da Injin: Me yasa Haɗin Kai tsaye Yana Canza Komai
Bakin karfe simintin gyare-gyare da kyar ke jigilar kai tsaye daga benen shakeout. Yawancin suna buƙatar fasalulluka masu juriya: bawul ɗin kujera tare da ≤0.015 mm cylindricity, fuskokin flange tare da Ra ≤0.8 µm, ko daidaitawa tsakanin ɗaukar mujallu da saman saman. Cimma wannan yana buƙatar haɗin kai babu mai siyar da ke waje da zai iya bada garantin.
Muna injin kowane simintin bakin karfe a cikin gida ta amfani da cibiyoyi 5-axis CNC sanye take da kayan aiki mai rai da bincike cikin tsari. Ana tabbatar da ma'auni masu mahimmanci a tsakiyar tsari-ba kawai a lokacin dubawa na ƙarshe ba. Misali, matsugunin famfo na silinda na piston suna fuskantar ƙarewa yayin da har yanzu suna cikin tsari iri ɗaya da ake amfani da su don niƙa fuska. Wannan yana kawar da kurakurai na sake gyarawa kuma yana riƙe da hankali tsakanin bututun silinda da flange mai hawa zuwa 0.02 mm - ya fi ISO IT6.
Wannan haɗin kai kuma yana ba da damar dabarun masana'antar haɗaɗɗun. A kan T800 cobalt na tushen winch shaft rollers, muna jefa sifofi kusa-net tare da izinin injinan mm 2.5, sannan mu shafa juzu'i maimakon niƙa. Sakamako: Mutuncin saman yana inganta (babu ƙonewa), lokacin sake zagayowar ya faɗi 40%, kuma ragowar matsananciyar damuwa yana ƙaruwa da 120 MPa- kai tsaye yana faɗaɗa rayuwar sabis a cikin mahalli na ruwa.
Zabar Abokin Hulɗa Da Ya dace yana nufin yin Tambayoyi masu dacewa
Tambayi mai kawo kaya: Shin sun mallaki duka biyun simintin gyare-gyare da injina? Za su iya samar da cikakken abin ganowa zuwa lambar zafi? Shin suna kwaikwayi ƙarfafawa kafin fara zuba-ko kuma sun dogara da tsarin tarihi? Idan amsar ita ce "a'a" ga kowa, kuna fitar da sarrafa tsari.
A QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Bakin karfe simintin gyare-gyare ba sabis ne na kashin kai ba-ƙulli ɗaya ne a cikin tsarin rufaffiyar madauki da ke haɗa ƙarfe, ƙwaƙƙwaran kimiyya, ƙirar ƙira, da ingantaccen aiki. Mun isar da sama da 14,000 bakin karfe da simintin gyare-gyare ga abokan ciniki a duk faɗin Arewacin Amurka, Turai, da Kudu maso Gabashin Asiya-kowanne yana ɗauke da cikakkun bayanan dubawa, yanayin zafi, da rahotanni masu dacewa da GD&T. Mayar da hankalinmu ya kasance kunkuntar: abubuwan masana'antu waɗanda dole ne su rayu - bawul ɗin matsa lamba, gidajen famfo, ramukan abin hawa na injiniya-inda gazawar ba zaɓi bane.
Ƙarshe na gaba na simintin bakin karfe ba zai fito daga manyan tanderu ba ko kuma zub da sauri. Zai fito ne daga ƙaƙƙarfan haɗin kai tsakanin masana'anta da kantin injin, zurfin fahimtar mahaɗan microstructure-aiki, da sadaukar da kai ga rubuce-rubucen sarrafa tsari. Daga nan ne ainihin abin dogara ya fara.
