42CrMo bututun ƙarfe mara nauyinasa ne na ultra-high ƙarfi karfe, tare da babban ƙarfi da tauri, mai kyau hardenability, babu bayyananne tempering brittleness, high gajiya iyaka da Multi tasiri juriya bayan quenching da tempering, kuma mai kyau low-zazzabi tasiri tauri.
Karfe ya dace da kera manyan gyare-gyaren filastik masu girma da matsakaici waɗanda ke buƙatar takamaiman ƙarfi da ƙarfi.Its daidai ISO iri: 42CrMo4 yayi dace da Jafananci iri: scm440 yayi dace da Jamus iri: 42CrMo4 kusan yayi dace da American iri: 4140 halaye da ikon yinsa, babban ƙarfi, high hardenability, mai kyau tauri, kananan nakasawa a lokacin quenching, da kuma high creep ƙarfi ƙarfin juriya a babban zafin jiki.Ana amfani da shi don kera ƙirƙira tare da ƙarfi mafi girma kuma mafi girma quenched da yanayin giciye fiye da 35CrMo karfe, kamar manyan gears don gogayya na locomotive, supercharger watsa kayan aiki, ramukan baya, sanduna masu haɗawa da shirye-shiryen bazara tare da babban kaya, rawar bututu da kamun kifi. kayan aikin rijiyoyin mai da ke ƙasa da 2000m, da kuma kayan aikin injin lankwasa.
Chemical abun da ke ciki na 42CrMo m karfe bututu: c: 0.38% - 0.45%, si: 0.17% - 0.37%, mn: 0.50% - 0.80%, cr: 0.90% - 1.20%, mo: 0.15% - 0.25%, Ni 0.25% 0.030%, P ≤ 0.030%, s ≤ 0.030%
Matsayin abubuwa daban-daban na sinadarai a cikin bututun ƙarfe:
Carbon (c):a cikin karfe, mafi girman abin da ke cikin carbon, mafi girma ƙarfi da taurin karfe, amma filastik da taurin kuma za a rage;Akasin haka, ƙananan abubuwan da ke cikin carbon, mafi girman filastik da taurin karfe, kuma ƙarfinsa da taurinsa kuma za a rage su.
Silicon (SI):kara zuwa talakawa carbon karfe a matsayin deoxidizer.Daidaitaccen adadin siliki zai iya inganta ƙarfin ƙarfe ba tare da tasiri mai tasiri akan filastik ba, tasiri mai ƙarfi, aikin lankwasa sanyi da walƙiya.Gabaɗaya, abun ciki na siliki na ƙarfe da aka kashe shine 0.10% - 0.30%, kuma babban abun ciki (har zuwa 1%) zai rage filastik, ƙarfin tasiri, juriya na tsatsa da weldability na ƙarfe.
Manganese (MN):shi ne mai rauni deoxidizer.Adadin da ya dace na manganese zai iya inganta ƙarfin ƙarfe yadda ya kamata, kawar da tasirin sulfur da oxygen a kan zafi mai zafi na karfe, inganta aikin aiki mai zafi na karfe, da inganta yanayin sanyi na karfe, ba tare da rage girman filastik da tasiri ba. taurin karfe.A abun ciki na manganese a cikin talakawa carbon karfe ne game da 0.3% - 0.8%.Maɗaukakin abun ciki (har zuwa 1.0% - 1.5%) yana sa ƙarfe ya lalace kuma yana da ƙarfi, kuma yana rage juriyar tsatsa da waldawar ƙarfe.
Chromium (CR):zai iya inganta ƙarfi da taurin carbon karfe a cikin yanayin mirgina.Rage elongation da rage yanki.Lokacin da abun ciki na chromium ya wuce 15%, ƙarfi da taurin za su ragu, kuma tsawo da raguwar yanki zai karu daidai.Sassan da ke dauke da karfe chromium suna da sauƙin samun ingancin sarrafa saman saman bayan niƙa.
Babban aikin chromium a cikin quenched da tempered tsarin karfe ne don inganta taurin.Bayan quenching da tempering, da karfe yana da mafi m inji Properties, da chromium dauke da carbide za a iya kafa a cikin carburized karfe, don inganta lalacewa juriya na abu surface.Chromium yana daya daga cikin muhimman abubuwa a cikin bakin karfe, wanda galibi yana inganta rigakafin tsatsa, taurin kai da juriya na karfe.
Molybdenum (MO):molybdenum na iya tace hatsin ƙarfe, inganta ƙarfin ƙarfi da ƙarfin zafi, da kuma kula da isasshen ƙarfi da juriya mai zafi a babban zafin jiki (danniya na dogon lokaci da nakasar a babban zafin jiki, wanda ake kira creep).Ƙara molybdenum zuwa ƙarfe na tsari na iya inganta kayan aikin injiniya.Hakanan yana iya hana gaɓar ƙarfen da wuta ke haifarwa.
Sulfur:cutarwa kashi.Zai haifar da zafi mai zafi na karfe da kuma rage filastik, tasirin tasiri, ƙarfin gajiya da juriya na tsatsa na karfe.Abubuwan da ke cikin sulfur na karfe don ginin gabaɗaya ba zai wuce 0.055% ba, kuma ba zai wuce 0.050% a cikin tsarin walda ba.Phosphorus: abubuwa masu cutarwa.Ko da yake zai iya inganta ƙarfi da tsatsa juriya, yana iya da gaske rage filastik, tasiri tauri, sanyi lankwasawa da weldability, musamman sanyi embrittlement a low zazzabi.Ya kamata a sarrafa abun ciki sosai, gabaɗaya bai wuce 0.050% ba, kuma bai wuce 0.045% ba a cikin tsarin walda.Oxygen: illa mai cutarwa.Sanadin tashin hankali mai zafi.Gabaɗaya, ana buƙatar abun ciki ya zama ƙasa da 0.05%.Nitrogen: yana iya ƙarfafa ƙarfe, amma rage girman filastik, tauri, weldability da kaddarorin lankwasa sanyi na ƙarfe, da haɓaka haɓakar tsufa da ƙarancin sanyi.Gabaɗaya, ana buƙatar abun ciki ya zama ƙasa da 0.008%.
Lokacin aikawa: Agusta-11-2022