Izici Ezinomthelela We-500MPa Ibanga le-VN Microalloyed High-amandla Steel Bars Properties

Umphumela wokuqukethwe kwe-nitrogen ezakhiweni zemishini zebanga le-500MPa VN microalloyed high-amandla steel bars kwafundwa ngezivivinyo zokukhiqiza. Imiphumela ikhombise ukuthi okuqukethwe yi-nitrogen kukhuphukile kusuka ku-81PPM kuya ku-269PPM, usayizi wokusanhlamvu wemigoqo yensimbi awuzange ushintshe kakhulu, futhi amandla wokukhiqiza wemigoqo yensimbi akhuphukile kusuka ku-526MPa kuya ku-607MPa. Amandla wesivuno akhuphuke ngo-15.4%; amandla aqine akhuphukile esuka ku-678MPa aya ku-738MPa, futhi amandla aqine akhuphuke ngo-8.8%; isilinganiso sesivuno samandla sehle sisuka ku-1.29 saya ku-1.22. Umphumela wokuqiniswa kwe-nitrogen ku-VN microalloyed high-power steel bar ikakhulu ukuqinisa kwezulu, futhi ukuqinisa kwezulu kuyisizathu esikhulu sokwehla kwesilinganiso samandla-isivuno semigoqo yensimbi ye-VN.

Isingeniso

NgoJanuwari 2012, uMnyango wezeZindlu nokuThuthukiswa kwamaDolobha neziNdawo zasemaKhaya kanye noMnyango Wezimboni Nobuchwepheshe Bolwazi ngokuhlanganyela bakhipha umqulu, bephakamisa umhlahlandlela wokusheshisa ukusetshenziswa kwezinsimbi zensimbi ezinamandla amakhulu: ekupheleni kuka-2015, ukukhishwa imigoqo yensimbi yamandla ibalwa ngama-80% wokukhishwa okuphelele kwama-rebars. Okwezakhiwo ezinkulu eziphakeme kanye nezakhiwo zomphakathi ezinesikhala esikhulu, i-500MPa incanyelwa ukubuyiselwa kwebanga. Ngezidingo zokwakhiwa komnotho wezwe lami, isidingo samabha ensimbi aphezulu angama-500MP ezakhiweni zokwakha siyanda. Ngenxa yesivinini sokukhiqiza esisheshayo semigoqo yensimbi kanye nezinga lokushisa eliphakeme, izinga lokushisa lokugcina livame ukuba ngaphezu kuka-1000 ℃. Izici zayo zobuchwepheshe zinquma ukuthi ukwakheka kwengxubevange yamabha ensimbi kufanelekile ekusetshenzisweni kobuchwepheshe be-vanadium microalloying [1]. Ukwanda kwe-nitrogen kuzuza i-vanadium. Indlela eyinhloko yokuqinisa imigoqo yensimbi esetshenzisiwe ilungele ukwehlisa inani le-vanadium nokonga izinsiza ze-vanadium [2-4]. Ubuchwepheshe be-VN microalloying busetshenziswe kabanzi njengeteknoloji ejwayelekile yokukhiqiza yokuthuthukisa imigoqo yensimbi enamandla kakhulu ethandekayo ekhaya nakwamanye amazwe. Inani elikhulu lezifundo likhombisile [1-9] ukuthi ubuchwepheshe be-VN microalloying buxhomeke kakhulu ekwandiseni i-nitrogen ukukhuthaza imvula ye-vanadium ngesimo se-vanadium carbide, i-vanadium nitride noma i-vanadium carbonitride, eyenza izinhlayiya ezinhle ezihlakazekile zesigaba sesibili ukukhiqiza umphumela onamandla wokuqinisa imvula Ukukhulisa amandla wensimbi. Kodwa-ke, ukwanda ngokweqile kwe-nitrogen kuzodala okunye ukukhubazeka kokusebenza kwamabha ensimbi, ikakhulukazi inkomba yokusebenza kwensimbi yensimbi. Umphumela wokuqukethwe kwe-nitrogen kuzakhiwo zemishini ye-500MPa VN imigoqo yensimbi esetshenzisiwe ifundwa ngokuhlolwa kokukhiqiza. Ihlaziye indlela yokuqinisa i-nitrogen ku-VN imigoqo yensimbi esetshenzisiwe kanye nomthelela we-nitrogen emandleni nasekulinganisweni kwesilinganiso semigoqo yensimbi ye-VN microalloyed, okungukuthuthuka kwemigoqo yensimbi enamandla kakhulu ye-VN.

Nikeza ngesisekelo sokukhiqizwa.

Izinto zokuhlola nezindlela

Ukuze kuthuthukiswe imigoqo yensimbi enamandla aphakeme angama-500MPa ngokusebenza okuzinzile, isitshalo senkampani ye-steelmaking silandelele ngokulandelana izinhlobo ezintathu zezinsimbi ezisebenza nge-VN ezinokuqukethwe okune-nitrogen ehlukile, futhi sasebenzisa inqubo efanayo yokukhiqiza kabusha (ukupholisa kwemvelo ngemuva kokugingqika) ukuhlola ukukhiqizwa ka 500MPa grade steel imigoqo. Izinsimbi ezintathu zibizwa ngo-1 #, 2 #, 3 #, futhi izingxenye zazo eziyinhloko zamakhemikhali zikhonjisiwe kuThebula 1.

Ukucwenga izinhlobo ezintathu zensimbi ngokuqukethwe okune-nitrogen okuhlukile futhi ngokuqhubekayo kufakwa kuma-billets ngezincazelo ze-150mm × 150mm × 6000mm, kuzithumela esitshalweni sebha yenkampani yeqembu ukuthi sizigoqele emigoqweni yensimbi ngokucaciswa kwe- Φ25mm, nokwelula amasampula wensimbi engu-1 # , 2 #, no-3 # Esivivinyweni, amandla esivuno namandla we-tensile wezinsimbi ezintathu ahlolwe ngokulandelana, isilinganiso samandla okukhiqiza amandla esingu-1 #, 2 #, no-3 # amabha ensimbi abaliwe, kanye nesakhiwo se-metallographic izinsimbi ezintathu zabonwa.

Ngokwemiphumela yokuhlolwa kokuqina kwe-1 #, 2 #, kanye ne-3 # steel bar, ijika liyakhonjiswa ku-Figure 1. khuphuka ngokulandelana. Amandla wesivuno se-bar # yensimbi engu-1MPa futhi amandla aqine angama-1MPa; amandla isivuno 526 # steel bar 678MPa futhi amandla eqine 2MPa; amandla isivuno 553 # steel bar 698MPa futhi amandla eqine 3MPa. Okuqukethwe kwe-nitrogen kukhuphukile kusuka ku-607PPM kuya ku-738PPM, amandla okuvuna emigoqo yensimbi akhuphukile kusuka ku-81MPa kuya ku-269MPa, ukwanda kwe-526MPa, namandla okuvuna akhuphuke ngo-607%; ngasikhathi sinye, amandla aqine akhuphukile esuka ku-81MPa aya ku-15.4MPa, ngokunyuka kwe-678MPa, futhi ukwanda kwamandla okuqina kwaba ngu-738%.

Ngokuya ngamandla wesivuno namandla aqine ka-1 #, 2 #, no-3 # steel bars, ama-energy-yield ratios of the three abalwa ngokulandelana futhi adonselwa kwijika eliboniswe ku-Figure 2. Ijika eliku-Figure 2 kukhombisa ukuthi njengoba okuqukethwe kwe-nitrogen kukhuphuka, isilinganiso samandla kuya kokuvunwayo semigoqo yensimbi sincipha ngokulandelana. Phakathi kwazo, izilinganiso zokukhiqiza amandla ezi-1 #, 2 #, kanye no-3 # imigoqo yensimbi zingu-1.29, 1.26, no-1.22 ngokulandelana.

Umphumela wokuqukethwe kwe-nitrogen ngosayizi wokusanhlamvu wemigoqo yensimbi

Umdwebo 3 ukhombisa ukwakheka kwensimbi ye-metallographic ye-1 #, 2 #, kanye ne-3 # imigoqo yensimbi. Imininingwane eningiliziwe yezakhi ezintathu ze-metallographic iyakhonjiswa kuThebula 2. Ithebula 2 libala ukwakheka kwesigaba nosayizi wenhlamvu ka-1 #, 2 #, 3 # steel bars. Lezi zakhiwo ezintathu zensimbi ziyi-ferrite + pearlite, kanti usayizi we-1 # steel bar ferrite okusanhlamvu ucishe ube ibanga le-9 -9.5, 2 # rebar usayizi we-ferrite okusanhlamvu cishe u-9.5 grade, 3 # rebar usayizi we-ferrite okusanhlamvu ucishe ube 9-9.5 grade. Idatha ekuThebula 2 ikhombisa ukuthi ngokwanda kokuqukethwe kwe-nitrogen, usayizi wokusanhlamvu webha yensimbi awuguquki kakhulu, noma ukuthi ukwanda kwe-nitrogen akunamthelela omkhulu ekwakhiweni kwezinto ezincane zensimbi ye-VN.

Ukuhlaziywa nengxoxo

Ukuhlaziywa kwendlela yokuqinisa i-nitrogen ku-500MPa grade VN insimbi esetshenzisiwe

Imiphumela yokuhlolwa kule ndatshana ikhombisa ukuthi okuqukethwe yi-nitrogen ebangeni le-500MPa grade VN microalloyed steel linyukile lisuka ku-81PPM laya ku-269PPM, nosayizi wokusanhlamvu wemigoqo yensimbi uzungeze u-9-9.5. Lokho wukuthi, ukwanda kwe-nitrogen akunamphumela osobala ekwakhiweni kwemigoqo yensimbi ye-VN. Ngasikhathi sinye, amandla wokuvuna namandla we-tensile amabha wensimbi akhuphukile aya kumazinga ahlukahlukene, ngamandla wesivuno akhula nge-81MPa kanye namandla we-tensile akhula nge-60MPa. Njengamanje, imibono eyinhloko yokuqinisa izinto zensimbi ifaka ukuqiniswa kwezixazululo eziqinile, ukuqiniswa okusanhlamvu okuhle, ukuqiniswa kokuguqulwa kwesigaba, nokuqiniswa kwesigaba sesibili. Ngokusobala, imiphumela yokuhlolwa kule ndatshana iwucacisa ngokusobala umphumela wokuqiniswa kokudla okusanhlamvu okuhle, kuyilapho ukuqiniswa kwesisombululo esiqinile nokuguqulwa kwesigaba Imiphumela yokuqinisa efana nokuqinisa ngokufanayo iyafana nezinsimbi ezintathu ezivivinywe kule ndatshana, ngaphandle kokuqiniswa kwesibili isigaba. Inani elikhulu lezifundo kanye nemikhuba yezinkolelo zikhombisile ukuthi i-nitrogen ilungiswa yi-vanadium kuzinsimbi eziqukethe i-vanadium ezinezinsimbi ezincanyana ukuze zenze i-vanadium nitride Noma imikhiqizo yezinhlayiyana zesigaba sesibili njenge-vanadium carbonitride, izinhlayiya zesigaba sesibili ezisensimbi zandisa kakhulu amandla insimbi ngokusebenzisa indlela yokuxhumana nokusabalalisa okuhambisa, okungukuthi, umphumela wokuqinisa imvula.

Ucwaningo oluhambisanayo lukhombisile ukuthi ukwanda kwe-nitrogen kuyazuzisa emvuleni ye-vanadium. Lokho kusho ukuthi, i-nitrogen ikhuthaza imvula ye-vanadium futhi inyuse ingxenyana yevolumu yezinhlayiya zesigaba sesibili. Imiphumela yocwaningo engaguquguquki ikhombisa ukuthi amandla ensimbi ayalingana nengxenyana yesilinganiso senhlayiya yesigaba sesibili sohafu. Ngakho-ke, lapho okuqukethwe kwe-vanadium sekwanele, ukwanda kwe-nitrogen ku-VN insimbi esebenza ngogesi empeleni Ingxenyana yevolumu yezinhlayiya zesigaba sesibili (i-vanadium nitride, i-vanadium carbonitride) engxenyeni yensimbi iyanda, ukuze umphumela wokuqiniswa kwezulu ube namandla. Imiphumela yokuhlolwa kuleli phepha ibonisa ukuthi ngokwanda kokuqukethwe kwe-nitrogen, amandla okuvuna namandla we-tensile we-500MPa grade VN steel bar anda ngokulandelana. Ngokusobala, imiphumela yokuhlolwa kuleli phepha iyahambisana nemiphumela yezifundo zethiyori ezihlobene.

Ukuhlaziywa kwethonya le-nitrogen kusilinganiso sokukhiqizwa kwamandla se-500MPa grade VN imigoqo yensimbi esetshenzisiwe

Imiphumela yokuhlolwa kuleli phepha ikhombisa ukuthi ngokwanda kokuqukethwe kwe-nitrogen, amandla okuvuna namandla we-tensile we-VN microalloyed steel bars akhuphuki esilinganisweni esifanayo. Ukwanda kwamandla okuvuna ngu-15.4%, kanti ukwanda kwamandla okuqina ngu-8.8%. Kungenxa yokuthi ukwanda kwamandla okuvuna kukhulu kunokukhuphuka kwamandla okuqina, isimanga sokuthi isilinganiso sokuqina kwamandla emigoqo yensimbi siyancipha.

Amandla esivuno sezinto zensimbi kanye nendlela yokulawula ngemicroscopic yamandla eqine ngokusobala ahlukile. Isivuno silawulwa kakhulu ukushibilika okukhulu kokuqhekeka kokuqukethwe, kuyilapho ukuphuka kulawulwa kakhulu ukuqala nokusabalalisa kwama-microcracks kulokho. . Ngakho-ke, ukutadisha isivuno sezinto ezibonakalayo ikakhulu kubheka ukungaziphathi kahle kokuqukethwe, ngenkathi ukutadishwa kokuqhekeka kwempahla kubheka kakhulu ukusebenza kwama-microcracks kulokho. Amandla wokukhiqiza wezinto zensimbi abhekisa emandleni lapho kwenziwa khona ukwenziwa kokusebenza kokuqukethwe futhi isibalo esikhulu sokususwa okungahambeki, okubangela ukuthi okokusebenza kuveze noma kukhiqize izinga elithile lokuguquguquka kwepulasitiki. Indlela yokuqinisa imvula yezinhlayiya zesigaba sesibili iyindlela yokuxhumana phakathi kwezinhlayiya zesigaba sesibili kanye nokwehlukaniswa okuslayidayo. Le ndlela yokuxhumana ihlukaniswe yaba yindlela yokusika kanye nendlela ye-Orowan, noma ngabe iyindlela yokusika noma indlela ye-Orowan, okwesibili Imvula yezinhlayiya zesigaba izovimba ukushibilika kokuhlukaniswa, ngaleyo ndlela ithuthukise kakhulu amandla wesivuno insimbi. Ngokuphathelene namandla aqine wezinto zensimbi, ihlobene kakhulu nokwakheka nokusakazwa kwama-microcracks ensimbi. Ukwakhiwa kwama-microcracks kuhilela isithiyo sokuhamba kwama-microdislocations, okuzokuvimbela ukwakheka nokusakazwa kwama-microcracks Expension, ngaleyo ndlela kuthuthukiswe ukuqina kwensimbi ngezinga elithile. Ngakho-ke, ngenkathi amandla esivuno sensimbi athuthukiswa, amandla awo okuqina nawo athuthukiswa ngezinga elithile.

Kuyavezwa ukuthi lapho ubukhulu besigaba sesibili sincane kakhulu, umphumela wokuqinisa kwezulu ekuqiniseni amandla esivuno sensimbi mkhulu kunomthelela wokwandisa amandla wensimbi aqine. Imiphumela yokuhlolwa kule ndatshana ikhombisa ukuthi umnikelo wokuqinisa kwezulu kumandla wokukhiqiza yi-81MPa, Inani lomnikelo lamandla aqine ngu-60MPa. Imiphumela yaleli phepha ifakazela ukuthi umnikelo wokuqinisa kwezulu kumandla wesivuno mkhulu kunowamandla eqine. Ngaphezu kwalokho, noma ngabe amandla esivuno namandla we-tensile wensimbi enyuswa ngezinga elifanayo, isilinganiso sesivuno sensimbi sizokwehla. Sekukonke, umphumela wokuqinisa kwezulu wezinhlayiya zesigaba sesibili ekugcineni uzokwehlisa isilinganiso sesivuno sensimbi. Ngakho-ke, ngokwanda kokuqukethwe kwe-nitrogen, uma uqina kakhulu ukuqinisa kwezulu umugqa wensimbi we-VN, kwehla isilinganiso sesivuno samandla sensimbi.

Ukukhanyiselwa kwemiphumela yocwaningo kuthuthukiswa kokuqiniswa kokuzamazama komhlaba okungama-500MPa

Emiphumeleni yokuhlolwa kwalesi sihloko, okuqukethwe yi-nitrogen yebha yensimbi engu-500MPa grade VN yensimbi engu-81PPM, 136PPM, 269PPM, kanye namandla afanayo ensimbi kanye nezilinganiso zokukhiqiza yi-1.29, 1.26, 1.22, okungukuthi, isilinganiso samandla nesivuno se Imigoqo yensimbi esebenza nge-VN iyahlukahluka Njengoba okuqukethwe kwe-nitrogen kukhuphuka futhi kuncipha, ukuhlaziywa okuningiliziwe kwezizathu sekuvele kwenziwe. Njengamanje, inkomba enkulu yokusebenza kokuzamazama komhlaba kwamabha ensimbi aphikisana namandla okuzamazama komhlaba adingeka ukuthi angabi ngaphansi kuka-1.25. Ngakho-ke, kusuka emiphumeleni yocwaningo yalesi sihloko, ekwakhiweni kwesigaba se-500MPa VN esinezinsimbi ezinamandla amakhulu zokulwa nokuzamazama komhlaba, ukuze kuqinisekiswe ukuthi inkomba eyinhloko yokusebenza kwenyikima inamandla Uma isilinganiso sesivuno sifanelekile, i-nitrogen okuqukethwe kufanele kulawulwe ngokuqinile ngokwenziwa kwamakhemikhali. Kuyinto efanelekile ukulawula okuqukethwe kwe-nitrogen ngaphakathi kwe-130PPM.

Isiphetho

• 1) Njengoba okuqukethwe kwe-nitrogen kukhuphuka, usayizi wokusanhlamvu we-VN osebenzise amandla amakhulu insimbi ayishintshi kakhulu.
• 2) Amandla wesivuno namandla e-TN amandla we-VN asebenzise amandla amakhulu amabha wensimbi akhula ngokwanda kokuqukethwe kwe-nitrogen, kepha isilinganiso sesivuno samandla sincipha ngokwanda kokuqukethwe kwe-nitrogen.
• I-3) Umphumela wokuqinisa we-nitrogen ku-VN imigoqo yensimbi ephezulu enamandla amakhulu ikakhulukazi ukuqiniswa kwezulu, nokuqiniswa kwemvula yisizathu esikhulu sokwehla kwesilinganiso sokukhiqiza amandla semigoqo yensimbi ye-VN.
• I-4) Ngokwakhiwa kwebanga le-500MPa grade VN microalloyed high-nguvu seismic steel bar, okuqukethwe kwe-nitrogen ensimbi kufanele kulawulwe ngaphakathi kwe-130PPM.

Sicela ugcine umthombo nekheli lale ndatshana ukuze uphinde uprintwe: Izici Ezinomthelela We-500MPa Ibanga le-VN Microalloyed High-amandla Steel Bars Properties

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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