Maganin masana'antar bakin karfe na Austenitic dole ne su isar da fiye da yarda da kayan kawai - dole ne su ba da garantin juriya na lalata da ke tsira da sabis na duniya: babban faɗuwar chloride a cikin injinan ruwa na teku, kekuna na thermal a cikin gidajen famfo, ko tuntuɓar slurry a cikin tsarin injin abin hawa. A QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Mun machined sama da 12,000 austenitic bakin karfe sassa don matsa lamba bawuloli da piston famfo Silinda gidaje tun 2019-kuma kowane gazawar bincike koya mana abu daya: lalata juriya ba a gasa a cikin sa. An ƙirƙira shi a cikin sarrafa tsari.
Juriya na Lalata Ya Fara Kafin Kera-Ba Bayan
Yawancin masu siye suna ɗaukar ASTM A351 CF8M ko UNS S31603 ta atomatik daidai "lalata-hujja." Suna kuskure. Mun ga simintin gyare-gyare iri ɗaya sun gaza a cikin yanayin ruwan teku iri ɗaya - wanda ya wuce gwajin fesa gishiri na sa'o'i 2,000; wani rami a cikin sa'o'i 72. Tushen dalili? Ba karkatacciyar sinadarai ba-amma rashin daidaituwar ƙarfi yayin simintin yashi. Microsegregation na gida ya ƙirƙiri yankunan chromium-depleted tare da iyakokin interdendritic. Gyaran ba a sake gwadawa ba. Yana sake fasalin tsarin gating, yana ƙara faranti mai sanyi, da kuma riƙe zafin ƙarfe na ruwa a cikin ± 5°C yayin zuba. Wannan shine yadda muke riƙe lambar ferrite tsakanin 5-8 FN a cikin kowane simintin CF8M - wanda aka tabbatar ta hanyar binciken maganadisu * kafin * maganin zafi, ba bayan ba.
Ba mu fitar da kayan ƙarfe ba. Rubutun albarkatun mu na gano kowane zafi zuwa rahoton gwajin niƙa (MTRs) yana nuna ainihin abun ciki na Cr, Mo, Ni, da N - ba kawai "ya dace da ƙayyadaddun bayanai ba." Don aikace-aikace masu mahimmanci kamar AMS 5387 cobalt alloy famfo sassan da ke aiki tare da gidaje austenitic, muna tabbatar da dacewa ta galvanic ta hanyar ma'auni mai yuwuwar buɗewa a cikin simulators na sabis. Idan m bambanci ya wuce 50 mV, mu daidaita surface passivation sigogi-ko da tushe gami ne "daidai."
Inda Yawancin Da'awar Masana'antar Bakin Karfe Na Austenitic Ya Rushe
Wasu masu ba da kayayyaki suna ba da kayan aikin “shaidar ISO” yayin amfani da calipers na hannu don binciken ƙarshe na mujallolin shaft ɗin juriya na 0.005 mm. Ba mu. Kowane ɓangaren bakin karfe na austenitic da ke barin cibiyarmu ta Qingdao tana fuskantar gwaje-gwaje uku marasa daidaituwa:
- Tabbatar da ingancin saman: Farar-haske interferometry akan fuskokin rufewa, ba kawai roughness (Ra) dabi'u ba-saboda santsi mai laushi tare da tsagewar ƙasa yana kiran lalatawar ɓarna.
- Tabbatar da Layer m: Electrochemical impedance spectroscopy (EIS), ba kawai nitric acid dip tests — don haka muna auna kauri oxide da ƙarancin lahani, ba kawai canjin launi ba.
- Ragowar taswirar damuwa: Diffraction X-ray a wurare 5 masu mahimmanci a kowane bangare, musamman kusa da fillet da zaren - tun lokacin da damuwa mai ƙarfi a sama da 200 MPa yana haɓaka SCC a cikin yanayin chloride.
Ɗaya daga cikin OEM na'ura mai aiki da karfin ruwa OEM ya ƙi jigilar mu na farko na tushen famfo S31603 - ba don kuskuren girma ba, amma don raguwar damuwa kusa da ramuka masu hawa. Mun amsa tare da cikakkun taswirorin damuwa, sannan muka sake tsara kayan aikin matsawa kuma mun ƙara tsufa-tsufawar girgiza kafin yin aikin ƙarshe. Isarwa ya ragu makonni biyu. Rayuwar lalata ta tsawaita daga watanni 18 zuwa 47 a gwaje-gwajen filin. Wannan shine cinikin-kashe babu bayanan da ya nuna.
Ayyukan Duniya na Gaskiya yana buƙatar Ƙarshen Duniya na Gaskiya
Machining marks al'amarin. Ƙarshen 0.8 µm Ra na iya saduwa da ƙayyadaddun bayanai - amma idan waɗannan alamun suna tafiya daidai da hanyar gudana a cikin jikin bawul, sun zama wuraren farawa na lalata. Muna daidaita hanyoyin kayan aiki don dacewa da lodin sabis: kewayawa don jujjuya ramummuka, axial don matsuguni masu tsayi, da radiyo masu gauraya a tsakani. Don abubuwan da ke tushen cobalt na T800 waɗanda aka haɗa su cikin majalissar austenitic, muna amfani da electropolishing *bayan* walda — ba kafin—don cire oxides da zafi ya shafa ba tare da yanke yatsan walda ba.
Haɓaka da aka fi nema? Passivation tare da citric acid + sodium nitrate maimakon nitric acid na gargajiya. Me yasa? Domin citric acid yana cire baƙin ƙarfe kyauta ba tare da narkar da chromium ba-mahimmanci lokacin sarrafa sassan nau'ikan nau'ikan duplex-austenitic. Muna inganta sakamako tare da gwajin sulfate na jan karfe * da * ferroxyl bayani mai nuna alama, duba duka tsaftar saman da daidaiton fim ɗin. Abokan ciniki suna ba da rahoton ƙarancin gazawar filin 3.2 × a cikin shigarwar bakin teku bayan sauyawa.
Zaɓan Kamfanin Austenitic Bakin Karfe Factory yana nufin zabar Abokin Tsari
Idan aikace-aikacenku ya ƙunshi matsi na cyclic, haɓakar zafin jiki, ko haɗin kayan abu mai gauraya, matakin abu mataki ɗaya ne kawai. Mataki na biyu shine tabbatar da yadda mai siyarwa ke sarrafa rarrabuwar kawuna, damuwa, da yanayin ƙasa a cikin batches. Mataki na uku yana tabbatar da cewa QA ɗin su baya tsayawa a daidaitaccen tsari - yana auna halayen lantarki, daidaituwar microstructural, da tsawon aiki.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. yana aiki azaman ƙari na ƙungiyar injiniyoyinku - ba mai siyar da sassan ba. Muna sake nazarin kiran GD&T don tasirin masana'anta akan juriyar lalata. Muna ba da alama ga ma'auratan galvanic kafin a fara simintin gyare-gyare. Muna riƙe cikakken abin ganowa har zuwa lambar ladle da log ɗin zagayowar zafi. Kuma lokacin da lalata ta bayyana a cikin sabis, ba mu aika da canji-muna aika rahoton tushen tushen tare da sassan giciye na ƙarfe da ka'idojin gyarawa.
Amintaccen juriya na lalata ba ta da garantin ƙima. An samo shi a cikin tushe, an tabbatar da shi a cikin lab, kuma an tabbatar da shi a cikin filin. Wannan shine ma'aunin kowane masana'antar bakin karfe austenitic yakamata ya hadu - amma kaɗan a zahiri suke yi.
