Izinguquko Ezakhiweni Zomshini Zensimbi Eqediwe Ngesikhathi Sokushisa

• Izici zemishini zensimbi emnene ngemuva kokubila: Lapho kufuthwe ngaphansi kuka-200 ° C, amandla nobulukhuni ngeke kwehle kakhulu, futhi i-plasticity nokuqina kuzohlala kungashintshiwe. Lokhu kungenxa yokuhlukaniswa kwama-athomu ekhabhoni ngaphandle kwemvula kulokhu kushisa. Ukuqiniswa kwesixazululo esiqinile kuyenziwa kugcinwe lapho ukufuthelana ekushiseni okungaphezulu kuka-300 ° C, ubulukhuni buyancipha kakhulu futhi ipulasitiki iyanda. Lokhu kungenxa yokunyamalala kokuqiniswa kwezixazululo eziqinile, ukunqwabelana nokukhula kwama-carbides, nokubuyiselwa nokuvuselelwa kabusha kwesigaba se-α. Ukusebenza okuphelele akutholakali okungcono kunalokho ngemuva kwe-low-carbon martensite tempering emazingeni aphansi okushisa.
• Insimbi ephezulu yekhabhoni ivamise ukusebenzisa ukucisha okungaphelele, ukuze okuqukethwe kwekhabhoni ku-austenite kube cishe ngo-0.5%. Ngemuva kokucima, kufudumele ekushiseni okuphansi ukuthola ubulukhuni obuphakeme, futhi inani elikhulu lama-carbide ahlakazekile akhiqizwa ukuthuthukisa ukumelana kokugqoka nokucwenga izinhlamvu ze-austenite. Lapho izinga lokushisa liphakeme kune-300 ℃, ubulukhuni namandla azokwehla ngokusobala, i-plasticity izokwanda, futhi ukuqina komthelela kuzokwehla kuye kokuphansi kakhulu. Lokhu kungenxa yokuthi i-carbide e-flaky prec ingena phakathi kwamabha we-martensite futhi ikhula ngokuphelele, ngaleyo ndlela inciphise ukuqina komthelela, ngenkathi i-matrix yandisa ukwanda kwepulasitiki futhi inciphise amandla ngenxa yomphumela ohlangene wokubuyiselwa nokuvuselelwa kabusha. ubulukhuni buzokhula kancane, okungenxa yemvula yama-carbides ahlakazekile we-ε (η), abangela ukuqina kweminyaka.
• Izici zemishini zensimbi yensimbi emaphakathi ngemuva kokushisa: Lapho ukufuthelana kungaphansi kuka-200 ℃, inani elincane lama-carbide lizongena, umphumela wokuqina awukhulu, nobulukhuni bungagcinwa ngaphandle kokuncipha. Lapho ukufuthelana kuphakeme kune-300 ℃, ngokunyuka kwamazinga okushisa okushisa, ipulasitiki iyanda, futhi ukuqina kwe-KIC kukhula kakhulu. Yize amandla enqabile, asephakeme kakhulu kunalawo wensimbi yekhabhoni ephansi.
• I-tempering brittleness: Lapho amanye ama-steels enomoya omnene, njengoba izinga lokushisa lokushisa landa, ubunzima bethonya buyancipha esikhundleni. Ubulukhuni obudalwa ukufuthelana kuthiwa yi-temper brittleness.
• Lapho ufuthwe ngo-300 ° C, ubulukhuni buyancipha kancane. Ngakolunye uhlangothi, imvula eqhubekayo yekhabhoni izonciphisa ubunzima; ngakolunye uhlangothi, ukuguqulwa kwe-austenite egcinwe kakhulu ku-martensite ku-carbon steel ephezulu kuzodala ukuqina. Lokhu kudala ukuthi ubunzima buyehle ngobumnene, futhi kungahle kukhule. Isabhebheka ngemuva kokufuthelana.

Ukwenzeka ku-200 ~ 350 ℃ kubizwa ngokuthi uhlobo lokuqala lwe-brittleness; okwenzeka ku-450 ~ 650 ℃ kubizwa ngokuthi uhlobo lwesibili lwe-brittleness.

1. Uhlobo lokuqala lwentukuthelo ukuthukuthela okungalungiseki.

Lapho kuvela uhlobo lokuqala lwentukuthelo, lungasuswa ngokushisa kufudumale izinga lokushisa; uma ukufudumala kuleli banga lokushisa, ukuqina okunjalo ngeke kuvele. Ngakho-ke, kubizwa ngokuthi brittleness yomoya ongalungiseki. Ezingxenyeni eziningi, uhlobo lokuqala lwe-brittleness lukhona. Lapho o-Mo, W, Ti, Al bakhona ensimbi, ubulukhuni bohlobo I bungase buthakathaka noma bucindezelwe.

Njengamanje, kunemibono eminingi ngembangela yohlobo lokuqala lwentukuthelo, futhi asikho isiphetho esiphelele. Kubukeka sengathi kungenzeka ukuthi kube ngumphumela ophelele wezizathu eziningi, futhi ngezinto ezahlukahlukene zensimbi, kungenzeka futhi ukuthi kudalwe yizizathu ezahlukahlukene.

Ekuqaleni, ngokususelwa ebangeni lokushisa lohlobo lokuqala lwentukuthelo eyenzekile yaqondana nokuguqulwa kwesibili kwensimbi yensimbi lapho kufutheliswa, okungukuthi, ibanga lokushisa lokuguqulwa okugcinwe kwe-austenite, uhlobo lokuqala lwentukuthelo lwaluthathwa njenge igcinwe i-austenite. Kubangelwa ukuguqulwa, isigaba seplastiki i-austenite sizonyamalala ngenxa yenguquko. Leli phuzu lokubuka lingachaza kahle lo mkhuba wokuthi izinto ezinjengoCr noSi zidudula uhlobo lokuqala lwentukuthelo ekushiseni okuphezulu futhi ukwanda kwenani le-austenite eligciniwe kungangena ohlotsheni lokuqala lwentukuthelo. Kepha kwamanye ama-steels, uhlobo lokuqala lwentukuthelo aluhambisani ngokuphelele nokuguqulwa kwe-austenite egciniwe. Ngakho-ke, i-austenite transformation theory egcinwe ayikwazi ukuchaza uhlobo lokuqala lwentukuthelo yezinsimbi ezahlukahlukene.

Ngemuva kwalokho, inkolelo-mbono yokugcinwa kwe-austenite eguqukile yaphinde yathathelwa indawo yi-carbide thin shell theory. Kuqinisekiswa yi-electron microscope ukuthi lapho uhlobo lokuqala lwentukuthelo lwenzeka, kwakhiwa igobolondo elincane le-carbide eceleni komngcele wokusanhlamvu. Ngokuya ngalokhu, kukholelwa ukuthi uhlobo lokuqala lwentukuthelo lubangelwa igobolondo elincane le-carbide. Kuyaziwa ukuthi ukwakheka kwezigaba ezi brittle eceleni kwemingcele yokusanhlamvu kungadala ukuqhekeka kwama-brittle intergranular. Umbuzo ukuthi amagobolondo amancane we-carbide abonwe akhiwa kanjani.

Njengoba kushiwo ngaphambili, ngemuva kokucima ama-carbon steels aphansi naphakathi, i-lath martensite kanye ne-shell-like egcinwe i-austenite enokuqukethwe kwekhabhoni ephezulu okusatshalaliswa emingceleni ye-lath kuyatholakala. Lapho ukufuthelana ekushiseni okuphansi, ukwahlukaniswa kwekhabhoni kuphela okwenzeka ku-lath martensite enokuqukethwe kwekhabhoni engaphansi kuka-0.2% ngaphandle kwezulu lama-carbides, kuyilapho i-martensite enokuqukethwe kwekhabhoni okungaphezulu kuka-0.2% ingahle ifane eMartensite Hlakazeka futhi inciphise ukuhlangana. ama-carbides wezinguquko.

Lapho izinga lokushisa lokushisa lidlula u-200 ° C, ama-carbide amahle afana nenaliti nawo angahle angene ku-carbon-martensite ephansi. Ngasikhathi sinye, i-θ-carbide nuclei izokwakhiwa emngceleni we-lath martensite bar futhi ikhule ibe yimichilo ye-θ-carbide. Ukwakheka kwale θ-carbide akuthembeli kuphela ekubola kwe-austenite egciniwe, kepha futhi kuncike ekuqothulweni kwe-carbides yesikhashana esatshalalisiwe kanye nenaliti efana ne-θ-carbide ebekiwe ku-martensite. Le strip-carbide emise okwesiqeshana i-carbide emincane emise okweqokobhe ebonwa ngaphansi kwemicroscope ye-electron. Kungabonakala ukuthi ngezinsimbi ezine-austenite enekhabhoni ephezulu egcinwe emngceleni we-lath, i-theustenite transformation theory egcinwe iyahambisana ne-carbide shell shell theory.

Lapho i-high-carbon martensite ifuthwe ngaphansi kuka-200 ℃, ama-carbide wokuguqula aguqukayo ahlakazeka futhi ancipha ku-martensite ethambile, futhi lapho izinga lokushisa lokushisa lingaphezu kuka-200 ℃, imichilo izongena esibonakalayo sewele eline-carbon. Umumo χ no-θ-carbides. Ngasikhathi sinye, ama-θ-carbide akhulisiwe azophinda ancibilike. Imichilo ye-χ ne-θ- carbide esatshalaliswe kwi-interface efanayo yamawele izoxhunywa kumashidi e-carbide, ngakho-ke ukuphuka kungenzeka kwenzeke kuleyo ndawo, okwandisa ukuqina kwensimbi. Lapho izinga lokushisa lokushisa landa ngokwengeziwe, ama-carbide angenalutho ayaqhekeka, ahlanganiswe, futhi akhule abe yi-carbides ayimbudumbudu, ngakho-ke ukuqina kuyancipha futhi ukuqina komthelela kuyanda.

Umbono wesithathu umbono wokuhlukaniswa kwemingcele okusanhlamvu. Lokho okungukuthi, izinto zokungcola P, Sn, Sb, As, njll. Zizogxila emngceleni wezinhlamvu ngesikhathi sokusizwa. Ukuhlukaniswa kwezinto zokungcola kubangela ukuba buthaka kwemingcele yokusanhlamvu futhi kuholele ekuqhekekeni okulimazayo. Ukuhlukaniswa kwezinto ezingcolile emngceleni we-austenite okusanhlamvu kuqinisekiswe yi-Auger electron spectrometer ne-ion probe [43,44]. UMn, Si, Cr, Ni, V angakhuthaza ukwahlukaniswa kwezinto ezingcolile emngceleni we-austenite wokusanhlamvu, ngakho-ke kungakhuthaza ukuthuthukiswa kohlobo lokuqala lwe-brittleness yomoya. I-Mo, W, Ti, Al ingavimbela ukuhlukaniswa kwezinto ezingcolile emngceleni we-austenite wokusanhlamvu, ngakho-ke ingavimbela ukuthuthukiswa kohlobo lokuqala lwentukuthelo.

2. Uhlobo lwesibili lwentukuthelo ukuguquguquka komoya.

Okungukuthi, ngemuva kokuhlanganiswa, uma kufudunyezwa ngaphezulu kuka-650 ℃, bese ipholile masinyane ekamelweni lokushisa, i-embrittlement ingaqedwa. Ngemuva kokuthi ukukhishwa kwe-embrittlement sekuqediwe, ukuhlanganiswa kungaphinda kwenzeke, ngakho-ke kubizwa ngokuthi yi-reversible temper brittleness. Ukwakheka kwamakhemikhali kuyinto ethinta uhlobo lwesibili lwe-brittleness. Ngokwemisebenzi ehlukene, ihlukaniswe izigaba ezintathu:

• (1) Izici zokungcola P, Sn, Sb, As, B, S;
• (2) Ni, Cr, Mn, Si, C, ezikhuthaza uhlobo lwesibili lokuqina komoya;
• (3) Mo, W, V, Ti kanye nezinto ezingavamile zomhlaba La, Nb, Pr ezivimbela uhlobo lwesibili lokuqina komoya;

Izinto zokungcola kumele zihlangane nezakhi ezithuthukisa uhlobo lwesibili lokuqina komoya ukudala ukudinwa komoya.

Sicela ugcine umthombo nekheli lale ndatshana ukuze uphinde uprintwe:Izinguquko Ezakhiweni Zomshini Zensimbi Eqediwe Ngesikhathi Sokushisa

UMinghe Inkampani yeDie Casting anikezelwe ekukhiqizeni nasekuhlinzekeni ikhwalithi nokusebenza okuphezulu Izingxenye Zokulingisa (izingxenye zensimbi zensimbi zokufa zisebenza ikakhulukazi zibandakanya I-Thin-Wall Die Casting,I-Hot Chamber Die Casting,Cold Chamber die Casting), Insizakalo Eyindilinga (Insiza Yokulingisa,ICnc Machining,Ukwenza Okubandayo, Surface Treatment) .Noma ikuphi ukusakazwa kwe-Aluminium die, i-magnesium noma i-Zamak / zinc die casting nezinye izidingo zokuphosa zamukelekile ukuxhumana nathi.

Ngaphansi kokulawulwa kwe-ISO9001 ne-TS 16949, Zonke izinqubo zenziwa ngamakhulu emishini esezingeni eliphakeme yokufa, imishini ye-5-axis, nezinye izikhungo, ezisukela kuma-blasters kuya kumishini yokuwasha ye-Ultra Sonic.Minghe akagcinanga ngemishini esezingeni eliphezulu kepha futhi unobuchwepheshe iqembu lonjiniyela abanolwazi, ama-opharetha nabahloli ukwenza ukwakheka kwekhasimende kugcwaliseke.

Umenzi wenkontileka yokufa kwabasikiwe. Amandla afaka izingxenye ezibandayo ze-aluminium die casting ezivela ku-0.15 lbs. kuye ku-6 lbs., Ukusetha ushintsho olusheshayo, nemishini. Izinsizakalo ezingezwe ngenani zifaka phakathi ukupholisha, ukudlidliza, ukuphazamisa, ukuqhumisa ngokudubula, ukupenda, ukuhlobisa, ukumboza, ukuhlangana nokusetshenziswa kwamathuluzi. Izinto zokusebenza ezisetshenzisiwe zifaka ama-alloys afana no-360, 380, 383, no-413.

I-Zinc die casting design usizo / izinsizakalo zobunjiniyela ezihambisanayo. Umenzi wangokwezifiso we-precision zinc die castings. Ukusakazwa okuncane, ukukhishwa kwengcindezi ephezulu, ukusikeka kwesikhunta esiningi, ukujikijelwa kwesikhunta okuvamile, ukufefa kwamayunithi kanye nokuzimela okuzimele kanye nokuvalwa okuvaliwe komgodi kungenziwa. Ama-Castings angenziwa ngobude nobubanzi obufinyelela ku-24 in. Ku +/- 0.0005 in. Ukubekezelelana.  

I-ISO 9001: Umkhiqizi oqinisekisiwe ka-2015 we-die cast magnesium, Amandla afaka i-high-pressure magnesium die casting up to 200 ton chamber hot & 3000 ton cold chamber, designing designing, polishing, molding, machining, powder & liquid paint, QA full with CMM amakhono , inhlangano, ukupakisha nokulethwa.

Kuqinisekiswe i-ITAF16949. Insiza Eyengeziwe Yokulingisa Faka ukukhipha utshalomali,ukuphonsa kwesihlabathi,Ukuphonswa kwamandla, Lost Foam Ekubunjweni,I-Centrifugal Casting,Ukuphoswa Kokuqothula,Permanent Isikhunta Ukulingisa, Amakhono afaka i-EDI, usizo lobunjiniyela, ukumodeliswa okuqinile nokucutshungulwa kwesibili.

Izimboni Zokulingisa Izingxenye Zamacala Ezifundo Zezimoto: Izimoto, Amabhayisikili, Izindiza, Izinsimbi Zomculo, I-Watercraft, Amadivayisi we-Optical, Izinzwa, Amamodeli, Amadivayisi we-elekthronikhi, Ukuvaleka, Amawashi, Imishini, Izinjini, Ifenisha, Ubucwebe, AmaJig, Telecom, Ukukhanyisa, Amadivayisi Wezokwelapha, amadivayisi wezithombe, Amarobhothi, okubaziwe, okokusebenza komsindo, okwezemidlalo, i-Tooling, Amathoyizi nokuningi. 

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By Umkhiqizi weMinghe Die Casting | Izigaba: Izindatshana Eziwusizo |Material Omaka: I-Aluminium Casting, Zinc Ukulingisa, Ukulingiswa kweMagnesium, I-Titanium Casting, Insimbi Engagqwali, Brass Ekubunjweni,Ukulingiswa kweBronze,Isakaza ividiyo,Umlando wenkampani,I-Aluminium Die Casting | Amazwana Off