Sanin abin da ya faru na fashe baki na pickling babu sumul bututu

Yin jifa a cikin lanƙwasa ko daidaitawa kuma zai haifar da matsalar tsagewar gefen yayin lalacewar tsintsiyarbututu maras kyau.

0Cr15mm9Cu2nin da 0Cr17Mm6ni4Cu2N bakin karfe suna cikin jerin austenitic bakin karfe 200, wanda ya bambanta da jerin 200 na gargajiya da jerin austenitic 300bakin karfe.Irin wannan200bakin karfe square tubeyana da haɗari ga ɓarke ​​​​gefe, fashewar ƙasa, Matsalar ƙarancin gyare-gyaren ƙarancin lalacewa.A cikin ainihin samar da mirgina mai zafi, nau'ikan ƙarfe guda biyu suna ɗaukar matakan dumama 200, kuma ana sarrafa zafin tanderu a 1215-1230C.Tsarin zafinta yana aiwatar da samfurin kwamfuta na mataki na biyu "Rough Rolling Regulations" da "Gama Ka'idojin Rolling".800-1020C.Magana game da ainihin aikin birgima mai zafi na pickling biyubututu maras kyau, tsara tsarin dumama da nakasar zafin wannan hanyar gwajin, sannan mu aiwatar da gwajin mirgina mai zafi mai zafi akan na'urar gwajin mirgina mai zafi da kanmu ƙera da ƙera.Bayanin yau na ƙungiyar bututu mai murabba'i: ta amfani da tsarin tacewa AOD + LF don samar da 0Cr15Mm9Cu2Nn da 0Cr17I6ni4Cu2N pickling marasa jijiyoyin jini ci gaba da simintin simintin gyare-gyare mara kyau ta hanyar lankwasawa ci gaba da yin simintin simintin gyare-gyare, girman giciye na ci gaba da yin simintin mara kyau shine 220m1260m.An nuna juzu'in yawan % a cikin tebur.Microstructure na mummunan harsashi a zurfin daban-daban na 0Cr15m9Cu2Nn acid-wanke ci gaba da simintin gyare-gyaren da ba na jini ba, kamar yadda aka nuna a cikin adadi, yayi daidai da zurfin simintin mugun harsashi.Lokacin da wani yanayi mara kyau ya faru kuma zafin gefen simintin ya kasa faɗuwa zuwa kewayon ƙarancin zafin jiki.Microstructure na 15 da 25m.Siffar ƙananan ƙirar da girman hatsi na bututun tukunyar jirgi mai matsa lamba 20g zai ƙaru tare da zurfin harsashi.Canje-canje, amma nuna wani bambanci.A cikin zurfin harsashi d0m, ƙananan tsarin tsarin dendrite na nau'in kwarangwal ne, kuma tazarar dendrite na farko da na sakandare kadan ne.A d5mm, galibi tsarin dendrite ne.

Tazarar Dendrite babba ne.A d>15mn, dendrites suna kama da tsutsotsi, amma a d25m, galibin lu'ulu'u ne na salula.Karamin tsari na Cr17Im6ni4Cu2N murabba'in bututu ci gaba da yin simintin simintin simintin gyare-gyare a cikin siffa 1 yana nuna cewa ci gaba da zubar da mummunan harsashi shine ainihin tsarin dendrite.Ko da yake akwai wasu bambance-bambance a cikin ilimin halittar dendrite, tsarinsa ya ƙunshi babban matrix austenite mai launin toka, da baƙar fata ferrite.Kamar bututun murabba'in 0Cr15Mn9Cu2Nin, yayin da zurfin harsashi ya karu, tazarar dendrite na farko da na sakandare a hankali yana ƙaruwa, kuma siffar dendrite tana canzawa daga kwarangwal zuwa tsutsa., Da filastik hali a cikin aiwatar da martensitic lokaci canji a lalacewa-resistant hada karfe bututu da aka experimentally nazari, da austenite size size da austenite hatsi girma doka, martensite fuskantarwa, lokaci canji plasticity, Effects na danniya da ilmin halitta a kan inji Properties. na bututun ƙarfe mai hade da lalacewa-resistant.A karkashin yanayin zafin jiki 1010 austenitization 15mir, farkon zafin jiki batu s da ƙarshen zafin jiki batu ㎡ na martensitic canji ya karu tare da karuwa da austenitization zafin jiki, da kuma sigogi a cikin lokaci canji roba model na lalacewa-resistant hada karfe bututu canji tare da karuwa da ƙara daidai damuwa.Lokacin da yawan zafin jiki na ingantawa ya kasance ƙasa da 1050C, haɓakar hatsi yana nuna tsarin ci gaban al'ada.Tare da haɓaka lokacin haɓakawa, zagaye karfe s yana ƙaruwa.-3500 thermal na'urar kwaikwayo, da roba hali na lalacewa-resistant hadaddun karfe bututu a lokacin martensitic canji tsari da aka gwaji gwajin, da kuma austenite size size da kuma ta austenite na'urar girma dokar da aka yi nazarin, da martensite Effects na fuskantarwa, lokaci canji plasticity, danniya da ilimin halittar jiki a kan inji Properties na lalacewa-resistant hadadden karfe bututu.A karkashin yanayin 1010 austenitization na minti 15, farkon zafin jiki batu s da ƙarshen zafin jiki batu ㎡ na martensitic canji ya karu tare da karuwa da austenitization zafin jiki, da kuma siga K a cikin zamani canji plasticity model na lalacewa-resistant hada karfe bututu yana ƙaruwa tare da daidai da danniya.Lokacin da zafin jiki na austenitizing ya kasance ƙasa da 1050C, haɓakar hatsi yana nuna tsarin ci gaban al'ada.Yayin da lokacin austenitizing ya karu, Shin yana ƙaruwa, kuma an raba canjin lokaci-B zuwa iyakokin hatsi.Ƙaddamarwa da haɓakar matakai kuma Akwai matakai biyu na nucleation da girma na Widmanite a.lokaci.Lokacin da yawan sanyaya ya karu daga 0.1C/s zuwa 150C/s, tsarin canji na lokaci na B+a daHatsin da ke cikin bututun ƙarfe mai jure lalacewa na iya kasancewa iri ɗaya da ƙanana, kuma martensite Fine madaidaicin hadaddun carbides sun haɗe a saman.Yin amfani da microscope na watsawa na lantarki, duban microscope na lantarki, x-ray diffractometer da hanyoyin electrochemical don nazarin microstructure da kaddarorin electrochemical na gami da bututun ƙarfe mai jure lalacewa a cikin jihohi daban-daban kamar yanayin simintin, yanayin kamanni, da yanayin abin hawa, da kuma binciken lantarki EPM The ilimin halittar jiki da abun da ke ciki na babban hazo a cikin bututun ƙarfe mai jure lalacewa wanda aka yi a 150-300C an bincika ta hanyar nazarin bakan makamashi.