42CrMo chitoliro chachitsulo chosasunthikandi ya chitsulo cholimba kwambiri, chokhala ndi mphamvu zambiri komanso kulimba, kulimba kwabwino, palibe kukwiya kodziwikiratu, kutopa kwambiri komanso kukana kukhudzidwa kosiyanasiyana pambuyo pozimitsa ndi kutentha, komanso kulimba kwamphamvu kwa kutentha kochepa.
Chitsulo ndi choyenera kupanga nkhungu zazikulu ndi zazing'ono zapulasitiki zomwe zimafuna mphamvu ndi kulimba.Mtundu wake wofananira wa ISO: 42CrMo4 umagwirizana ndi mtundu waku Japan: scm440 imagwirizana ndi mtundu waku Germany: 42CrMo4 pafupifupi imagwirizana ndi mtundu waku America: mawonekedwe a 4140 ndi kuchuluka kwa ntchito: mphamvu yayikulu, kuuma kwakukulu, kulimba kwabwino, kupindika pang'ono panthawi yozimitsa, ndi mphamvu zokwawa zazikulu komanso kupirira mphamvu pa kutentha kwakukulu.Amagwiritsidwa ntchito popanga ma forging okhala ndi mphamvu zapamwamba komanso zazikulu zozimitsidwa komanso zotentha kwambiri kuposa zitsulo za 35CrMo, monga magiya akulu oyendetsa magalimoto, magiya otumizira ma supercharger, ma shaft akumbuyo, ndodo zolumikizira ndi zomata za masika zokhala ndi katundu wambiri, zolumikizira mapaipi ndi usodzi. zida za zitsime zakuya zamafuta pansi pa 2000m, ndi nkhungu zamakina opindika.
Chemical zikuchokera 42CrMo msoko zitsulo chitoliro: 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%
Udindo wa zinthu zosiyanasiyana mankhwala mu zitsulo mapaipi:
Mpweya (c):muzitsulo, mpweya wochuluka wa carbon, umakweza mphamvu ndi kuuma kwachitsulo, koma pulasitiki ndi kulimba zidzachepetsedwa;M'malo mwake, kutsika kwa mpweya wa carbon, kumapangitsa kuti pulasitiki ndi kulimba kwachitsulo zikhale zolimba, ndipo mphamvu zake ndi kuuma kwake zidzachepetsedwa.
Silikoni (SI):kuwonjezeredwa ku chitsulo wamba wamba ngati deoxidizer.Kuchuluka kwa silicon kumatha kupititsa patsogolo mphamvu yachitsulo popanda kuwononga kwambiri pulasitiki, kulimba kwamphamvu, kuzizira kopindika komanso kuwotcherera.Nthawi zambiri, silicon zomwe zili muzitsulo zophedwa ndi 0,10% - 0.30%, ndipo zochulukirapo (mpaka 1%) zidzachepetsa kulimba kwa pulasitiki, kulimba kwamphamvu, kukana dzimbiri komanso kutsekemera kwachitsulo.
Manganese (MN):ndi deoxidizer yofooka.Kuchuluka koyenera kwa manganese kumatha kusintha mphamvu ya chitsulo, kuthetsa chikoka cha sulfure ndi mpweya pa brittleness yotentha yachitsulo, kukonza magwiridwe antchito achitsulo, ndikuwongolera chizolowezi chozizira chachitsulo, popanda kuchepetsa kwambiri pulasitiki ndi zotsatira zake. kulimba kwachitsulo.Zomwe zili manganese muzitsulo za carbon zitsulo zili pafupi 0,3% - 0.8%.Kuchuluka kwambiri (mpaka 1.0% - 1.5%) kumapangitsa chitsulo kukhala cholimba komanso cholimba, ndipo chimachepetsa kukana kwa dzimbiri ndi kuwotcherera kwachitsulo.
Chromium (CR):imatha kusintha mphamvu ndi kuuma kwa chitsulo cha carbon mu dziko logudubuza.Kuchepetsa kutalika ndi kuchepetsa dera.Zomwe zili mu chromium zikadutsa 15%, mphamvu ndi kuuma kumachepa, ndipo kutalika ndi kuchepetsedwa kwa dera kumawonjezeka mofanana.Zigawo zomwe zili ndi chitsulo cha chromium ndizosavuta kupeza mawonekedwe apamwamba apamwamba pambuyo popera.
Ntchito yayikulu ya chromium muzitsulo zozimitsidwa komanso zotenthedwa ndikuwongolera kuuma.Pambuyo pozimitsa ndi kutentha, chitsulocho chimakhala ndi makina abwino kwambiri, ndipo chromium yomwe ili ndi carbides imatha kupangidwa muzitsulo zopangira carburized, kuti ipititse patsogolo kukana kwa zinthu zakuthupi.Chromium ndi imodzi mwazinthu zofunika kwambiri muzitsulo zosapanga dzimbiri, zomwe makamaka zimathandizira kupewa dzimbiri, kulimba komanso kukana kuvala kwachitsulo.
Molybdenum (MO):molybdenum imatha kuyeretsa njere yachitsulo, kukulitsa kuuma komanso kulimba kwamafuta, komanso kukhalabe ndi mphamvu zokwanira komanso kukana kukwawa pa kutentha kwakukulu (kupsinjika kwanthawi yayitali ndi kupunduka pakutentha kwambiri, komwe kumatchedwa kukwawa).Kuonjezera molybdenum kuzitsulo zomangika kungathandize kukonza makina.Ikhozanso kulepheretsa kuphulika kwachitsulo cha alloy chifukwa cha moto.
Sulphur:chinthu choyipa.Zidzayambitsa kutentha kwachitsulo ndikuchepetsa pulasitiki, kulimba kwamphamvu, mphamvu ya kutopa komanso kukana dzimbiri kwachitsulo.sulfure zili zitsulo zomanga wamba sayenera upambana 0.055%, ndipo si upambana 0.050% mu nyumba welded.Phosphorous: chinthu chovulaza.Ngakhale imatha kupititsa patsogolo mphamvu komanso kukana dzimbiri, imatha kuchepetsa kwambiri pulasitiki, kulimba kwamphamvu, kupindika kozizira komanso kutsekemera, makamaka kuzizira kozizira pa kutentha kochepa.Zomwe zili ziyenera kuyendetsedwa mosamalitsa, nthawi zambiri zisapitirire 0.050%, komanso zosaposa 0.045% m'mapangidwe owotcherera.Oxygen: chinthu chovulaza.Zipangitsa kutentha brittleness.Nthawi zambiri, zomwe zili mkati zimafunika kukhala zosakwana 0.05%.Nayitrogeni: imatha kulimbitsa chitsulo, koma imachepetsa kwambiri pulasitiki, kulimba, kutsekemera komanso kuzizira kwachitsulo, ndikuwonjezera chizolowezi chokalamba komanso kuzizira.Nthawi zambiri, zomwe zili mkati zimafunika kukhala zosakwana 0.008%.
Nthawi yotumiza: Aug-11-2022