Hanyar samarwa da tsari na ma'aunin ƙarfe mai zafi-birgima
Dabarar bango:
A cikin kasuwar rebar na yanzu, hrb400e yana lissafin ƙarin.Hanyar ƙarfafa microalloy ita ce babbar hanyar samar da hrb400e a duniya.Microalloy shine yafi vanadium alloy ko niobium alloy, wanda ke cinye albarkatun gami da yawa a kowace shekara.Saboda ƙayyadaddun albarkatun ma'adinai da ke ɗauke da vanadium da niobium, wadatar waɗannan abubuwan haɗin gwal yana da ƙarfi.Don haka, idan za a iya rage abubuwan da ke cikin gawa na hrb400e karfe mashaya, zai samar da babbar fa'ida ta tattalin arziki da zamantakewa.
A cikin fasahar da ake da ita, layin samar da wayoyi guda biyu ba tare da ragewa da girman injin mirgina gabaɗaya yana ɗaukar ƙarfin ƙarfin vanadium gami don samar da hrb400e, kuma yawan adadin adadin vanadium shine 0.035% zuwa 0.045%.
Lamba na kasar Sin cn104357741a ya bayyana wani nau'in hrb400e mai karfin girgizar kasa mai jure karfin karfe da hanyar samar da shi.Ta hanyar, ƙãre samfurin da aka samar da wani ragewa da kuma sizing mirgina niƙa, wanda zai iya tabbatar da cewa karewa yi birgima karfe da aka yi birgima a wani low zazzabi na 730 ~ 760 ℃ don samun Ga finer hatsi, wannan hanya ba dace da samar Lines. ba tare da rage girman masana'anta ba.Lamba na kasar Sin cn110184516a ya bayyana hanyar shiri na babban waya φ6mm ~ hrb400e coiled dunƙule.Tare da taimakon ƙarfin mirgina mai ƙarfi na kayan aiki, ƙananan zafin jiki yana farawa daga zafin jiki mai zafi, kuma ana samun samarwa ba tare da microalloying ba.Rashin hasara na wannan hanyar ita ce, Abubuwan da ake buƙata don ƙarfin da aikin motsa jiki na kayan aiki mai mahimmanci da matsakaici suna da tsayi sosai, musamman don layin samarwa na torsion rolling, wanda ya rage rayuwar gwaji na kayan aiki kuma yana ƙara ƙimar kulawa na kayan aiki. kayan aiki, da yawan amfanin ƙasa na babban waya φ6mm~hrb400e coil samar da wannan hanya ne ragi.Rashin isasshen yawa, yana da wahala a ba da garantin ƙimar cancantar aiki.
Abubuwan aiwatarwa na fasaha:
Ƙirƙirar da aka ƙirƙira a halin yanzu tana da nufin samar da hanyar samar da sandunan ƙarfe masu zafi na birgima, musamman hanyar samar da katantanwa masu zafi don babban waya φ8 ~ φ10mm ~ hrb400e, wanda ke shawo kan ƙarancin da aka ambata a sama na fasahar da ta gabata kuma ta rage samarwa. halin kaka.
Tsarin fasaha na ƙirƙira na yanzu:
Hanyar samar da kayan aiki na katako mai zafi mai zafi, ƙayyadaddun sandar ribbed karfe waya shine φ8 ~ φ10mm, kuma tsarin fasaha ya haɗa da dumama - billeting - m mirgina - matsakaici mirgina - sanyaya - pre-kammala - sanyaya - karewa - sanyaya - kadi - Teburin nadi mai sanyaya iska - tarin coil - sannu a hankali;Si = 0.40% ~ 0.50%, mn = 1.40% ~ 1.60%, p≤0.045%, s ≤0.045%, v=0.015% ~ 0.020% Sauran su ne Fe da abubuwan da ba za a iya kaucewa ba;da key tsari matakai sun hada da: da tanderun zafin jiki ne 1070 ~ 1130 ℃, da prefinishing mirgina zafin jiki ne 970 ~ 1000 ℃, da kuma karewa mirgina zafin jiki ne 840 ~ 1000 ℃.880 ℃;kwanciya zazzabi 845 ~ 875 ℃;zafin jiki na ƙarshe na mirgina yana ƙasa da yanayin recrystallization na yankin austenite;saurin sanyaya ta fan akan tebur mai sanyaya iska, ƙarar iska shine 100%;The zafin jiki na murfin ne 640 ~ 660 ℃, da zafin jiki na zafi adana cover ne 600 ~ 620 ℃, da kuma lokacin a cikin zafi adana murfin ne 45 ~ 55s.
Ka'idar ƙirƙira: a cikin kewayon zafin jiki na 840-880 ℃, hatsi na Austenite suna elongated ta hanyar nakasawa, amma recrystallization baya faruwa.Duk da haka, ana haifar da nau'ikan nakasa a cikin hatsi na austenite, kuma ƙarshen maƙallan nakasar suna gaba ɗaya a kan iyakokin hatsi, kuma akwai kuma nau'ikan nakasa a cikin hatsi a matsayin iyakokin hatsi na fili don rarraba hatsin austenite mai tsawo.A lokacin canji daga austenite zuwa ferrite, duka iyakokin hatsi na austenite da aka bayyana a fili da yankin nakasar hatsi suna aiki azaman wuraren ɓoye don ferrite, wanda ke haifar da haɓakar ferrite bayan canji.Ƙananan zafin jiki na mirgina a cikin injin ƙarewa yana rage nauyin mirgina na roughing da tsaka-tsakin mirgina da kayan aikin riga-kafi kuma yana ƙara rayuwar sabis na kayan aiki.
Abubuwan da ke da fa'ida na ƙirƙira sune kamar haka: ta hanyar ƙara ƙaramin v don ƙarfafa microalloy, ana haɓaka ƙarfin yawan amfanin ƙasa, v da c suna samar da carbides, waɗanda aka haɓaka yayin aikin sanyaya bayan mirgina, kuma suna taka rawar ƙarfafa hazo. .Wurin da aka yi amfani da waya mai zafi na ƙirƙira yana da ƙarfin juzu'i na 600-700mpa, ƙarfin yawan amfanin ƙasa na 420-500mpa, matsakaicin ƙarfin yawan amfanin ƙasa na kusan 450mpa, da kuma agt> 10%, wanda ke tabbatar da isasshen iyaka.Ƙarfin yawan amfanin ƙasa yana da ƙarfi, kuma ƙimar cancantar aiki ya fi 99%.Ƙirƙirar ta hanyar fasaha ta warware matsalar cewa injin jujjuyawar yana da wuyar yin jujjuyawar zafi mai sauƙi, yana rage farashi akan yanayin tabbatar da cewa ba a rage ƙarfin samarwa ba, kuma yana haifar da fa'idodin tattalin arziƙi.
Cikakkun hanyoyin
Abubuwan da ke cikin ƙirƙira na yanzu an ƙara bayyana su a ƙasa tare da haɗin gwiwa.
Hanyar samar da ƙungiyar babbar waya φ8mm~φ10mmhrb400e naɗaɗɗen katantanwa.A mirgina tsari ne: zafin jiki mai fita: 1080 ~ 1120 ℃, shigar da pre-karewa mirgina 1030 ~ 1060 ℃, shigar da karewa mirgina zafin jiki: 850 ~ 870 ℃, kadi zazzabi: 850 ~ 870 ℃, fan iska girma 100%, shigar da insulation zafin jiki 640 ~ 660 ℃, 600 ~ 620 ℃ daga cikin zafi adana murfin, da lokaci a cikin zafi adana murfin ne 45 ~ 55s, kuma cools ta halitta.Ana nuna sinadarai na sandar waya na siffar abin da aka ƙirƙira a yanzu a cikin Table 1, kuma ana nuna kayan aikin injiniya na sandar waya na ƙirar ƙirar da aka ƙirƙira a cikin tebur 2.
Abubuwan sinadaran (wt%) na sandar waya na misalin tebur
Tebur 2 Kayan aikin injiniya na misali sandunan waya
Ƙarfin yawan amfanin ƙasa na babban waya φ8mm ~ φ10mmhrb400e coiled katantanwa da aka samar ta hanyar hanyar ƙirƙira yana cikin kewayon 420 ~ 500mpa, agt yana sama da 10%, ƙarfin yawan amfanin ƙasa yana sama da 1.35, kuma tsarin metallographic shine yafi ferrite. da pearlite., barga yi, isasshen yawan amfanin ƙasa ƙarfi da agt gefe, nasarar wannan tsari yana da matukar muhimmanci ga rage samar da farashin da kuma kara riba ga dual-line torsion mirgina samar Lines tare da in mun gwada da tsohon kayan aiki.
Fasalolin Fasaha:
1. Hanyar samar da kayan aiki na katako mai zafi mai zafi, ƙayyadaddun igiyoyin waya shine φ8mm ~ φ10mm, kuma tsarin fasaha ya haɗa da dumama - billeting - m mirgina - matsakaici mirgina - sanyaya - pre-kammala - sanyaya - kammala - sanyaya - kadi. - iska Cold tebur - tattara nada - sannu a hankali sanyaya, halin da cewa: da sinadaran abun da ke ciki taro kashi na karfe ne c = 0.20% ~ 0.25%, si = 0.40% ~ 0.50%, mn = 1.40% ~ 1.60%, p≤ 0.045%, s≤0.045%, v=0.015%~0.020%, sauran su ne fe da abubuwan da ba za a iya gujewa ba;Makullin aiwatar da matakan sun haɗa da: zafin jiki na tapping shine 1070 ~ 1130 ° C, zafin da aka rigaya ya ƙare shine 970 ~ 1000 ° C, kuma ana aiwatar da juyawa.Zazzabi shine 840 ~ 880 ℃;da kadi zafin jiki ne 845 ~ 875 ℃;zafin jiki na ƙarshe na mirgina yana ƙasa da zazzabi recrystallization na yankin austenite;yana da sauri sanyaya ta fan akan teburin abin nadi mai sanyaya iska, kuma ƙarar iska shine 100%;da abin nadi tebur da aka makaran ta rufe rufi cover, da zazzabi na shigar da rufi cover ne 640 ~ 660 ℃, da kuma yawan zafin jiki na exiting da rufi cover ne 600 ~ 620 ℃, da kuma lokaci a cikin rufi cover ne 45 ~ 55s.
Takaitaccen bayanin fasaha
A samar Hanyar zafi-birgima ribbed karfe mashaya, da spring karfe zafi-birgima waya sanda takamaiman ne Φ8mm ~ Φ10mm, da sinadaran abun da ke ciki taro kashi abun ciki na karfe ne C = 0.20% ~ 0.25%, Si = 0.40% ~ 0.50% , Mn = 1.40% ~ 1.60%, P≤0.045%, S≤0.045%, V = 0.015% ~ 0.020%, sauran su ne Fe da abubuwan da ba za a iya kaucewa ba;da mirgina tsari ne: tanderun zafin jiki ne 1070 ~ 1130 ℃, da pre-karewa ne da za'ayi.The mirgina zafin jiki ne 970 ~ 1000 ℃, da karewa mirgina zafin jiki ne 840 ~ 880 ℃;da kadi zafin jiki ne 845 ~ 875 ℃;zafin jiki na ƙarshe na mirgina yana ƙasa da zazzabi recrystallization na yankin austenite;%;Bayan rufe rufi cover na abin nadi, da yawan zafin jiki na shigar da rufi cover ne 640 ~ 660 ℃, da kuma yawan zafin jiki na exiting da rufi cover ne 600 ~ 620 ℃, da kuma lokaci a cikin rufi cover ne 45 ~ 55s.Ta hanyar ƙara ƙaramin adadin V alloy da kammala mirgina a ƙananan zafin jiki, ƙirƙira ba wai kawai tabbatar da ingantaccen aiki na kayan aiki ba, har ma yana rage abun ciki na gami da farashi.
Lokacin aikawa: Agusta-30-2022