42CrMo seamless steel yeeb nkabbelongs rau ultra-siab zog steel, nrog siab zog thiab toughness, zoo hardenability, tsis pom tseeb tempering brittleness, siab qaug zog txwv thiab ntau yam cuam tshuam tsis kam tom qab quenching thiab tempering, thiab zoo low-temperature cuam tshuam toughness.
Cov hlau yog tsim rau kev tsim cov yas pwm loj thiab nruab nrab uas xav tau qee lub zog thiab toughness.Nws cov khoom lag luam ISO: 42CrMo4 sib haum rau Japanese hom: scm440 sib haum rau German hom: 42CrMo4 kwv yees sib haum rau Asmeskas hom: 4140 tus yam ntxwv thiab cov peev txheej ntawm daim ntawv thov: siab zog, siab hardenability, zoo toughness, me deformation thaum quenching, thiab siab creep zog thiab endurance lub zog ntawm qhov kub thiab txias.Nws yog siv los tsim cov forgings nrog lub zog siab dua thiab loj dua quenched thiab tempered cross-section tshaj 35CrMo steel, xws li lub zog loj rau locomotive traction, supercharger transmission gears, rear shafts, txuas rods thiab caij nplooj ntoos hlav clips nrog zoo load, laum yeeb nkab txuas thiab nuv ntses. cov cuab yeej rau cov roj sib sib zog nqus qhov dej hauv qab 2000m, thiab pwm rau cov tshuab khoov.
Cov tshuaj muaj pes tsawg leeg ntawm 42CrMo seamless steel yeeb nkab: 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 ≤ 0.030%, P ≤ 0.030%, s ≤ 0.030%
Lub luag haujlwm ntawm ntau yam tshuaj lom neeg hauv cov kav dej steel:
Cov pa roj carbon (c):nyob rau hauv cov hlau, qhov siab dua cov ntsiab lus carbon, lub zog thiab hardness ntawm steel ntau dua, tab sis cov yas thiab toughness kuj yuav raug txo;Ntawm qhov tsis sib xws, qhov qis dua cov ntsiab lus carbon, qhov siab dua cov yas thiab toughness ntawm steel, thiab nws lub zog thiab hardness kuj yuav raug txo.
Silicon (SI):ntxiv rau cov pa roj carbon zoo tib yam li deoxidizer.Tus nqi ntawm silicon tuaj yeem txhim kho lub zog ntawm cov hlau tsis muaj qhov cuam tshuam loj rau plasticity, cuam tshuam toughness, txias dabtsi yog khoov kev ua tau zoo thiab weldability.Feem ntau, cov ntsiab lus ntawm silicon ntawm cov hlau tua yog 0.10% - 0.30%, thiab cov ntsiab lus siab dhau (txog 1%) yuav txo tau cov yas, cuam tshuam toughness, xeb kuj thiab weldability ntawm hlau.
Manganese (MN):nws yog ib tug tsis muaj zog deoxidizer.Tus nqi tsim nyog ntawm manganese tuaj yeem txhim kho lub zog ntawm cov hlau, tshem tawm cov tshuaj sulfur thiab oxygen ntawm kub brittleness ntawm hlau, txhim kho cov kub ua haujlwm ntawm cov hlau, thiab txhim kho qhov txias brittleness ntawm cov hlau, tsis tas yuav txo cov plasticity thiab cuam tshuam. toughness ntawm steel.Cov ntsiab lus ntawm manganese hauv cov pa roj carbon zoo tib yam yog li 0.3% - 0.8%.Cov ntsiab lus siab dhau (txog 1.0% - 1.5%) ua rau cov hlau nkig thiab tawv, thiab txo cov xeb tiv thaiv thiab weldability ntawm cov hlau.
Chromium (CR):nws tuaj yeem txhim kho lub zog thiab hardness ntawm carbon steel hauv dov lub xeev.Txo elongation thiab txo qhov chaw.Thaum cov ntsiab lus chromium tshaj 15%, lub zog thiab hardness yuav txo, thiab elongation thiab txo ntawm cheeb tsam yuav nce ntxiv.Cov khoom uas muaj chromium hlau yog ib qho yooj yim kom tau txais kev ua haujlwm zoo tom qab sib tsoo.
Lub luag haujlwm tseem ceeb ntawm chromium hauv quenched thiab tempered structural steel yog los txhim kho hardenability.Tom qab quenching thiab tempering, cov hlau muaj cov khoom siv zoo dua qub, thiab chromium uas muaj carbides tuaj yeem tsim hauv cov hlau carburized, thiaj li txhim kho qhov hnav tsis kam ntawm cov khoom nto.Chromium yog ib qho tseem ceeb ntawm cov hlau tsis muaj steel, uas feem ntau txhim kho kev tiv thaiv xeb, hardness thiab hnav tsis kam ntawm cov hlau.
Molybdenum (MO):molybdenum tuaj yeem kho cov nplej ntawm cov hlau, txhim kho hardenability thiab thermal zog, thiab tswj kom muaj zog txaus thiab nkag mus rau ntawm qhov kub thiab txias (kev ntxhov siab ntev thiab deformation ntawm qhov kub siab, hu ua creep).Ntxiv molybdenum rau cov qauv hlau tuaj yeem txhim kho cov khoom siv kho tshuab.Nws tseem tuaj yeem cuam tshuam qhov brittleness ntawm alloy steel los ntawm hluav taws.
Sulfur:teeb meem keeb.Nws yuav ua rau kub embrittlement steel thiab txo cov plasticity, cuam tshuam toughness, qaug zog thiab xeb kuj ntawm steel.Cov ntsiab lus sulfur ntawm cov hlau rau kev tsim kho dav dav yuav tsum tsis pub tshaj 0.055%, thiab nws yuav tsum tsis pub tshaj 0.050% hauv cov qauv welded.Phosphorus: yam tsis zoo.Txawm hais tias nws tuaj yeem txhim kho lub zog thiab xeb tsis kam, nws tuaj yeem txo qis plasticity, cuam tshuam toughness, txias dabtsi yog khoov kev ua tau zoo thiab weldability, tshwj xeeb tshaj yog txias embrittlement ntawm qhov kub thiab txias.Cov ntsiab lus yuav tsum nruj me ntsis tswj, feem ntau tsis ntau tshaj 0.050%, thiab tsis ntau tshaj 0.045% nyob rau hauv welded lug.Oxygen: yam teeb meem.Ua rau kub brittleness.Feem ntau, cov ntsiab lus yuav tsum tsawg dua 0.05%.Nitrogen: nws tuaj yeem ntxiv dag zog rau cov hlau, tab sis txo qis plasticity, toughness, weldability thiab txias dabtsi yog khoov zog ntawm cov hlau, thiab ua rau cov laus nyiam thiab txias brittleness.Feem ntau, cov ntsiab lus yuav tsum tsawg dua 0.008%.
Post lub sij hawm: Aug-11-2022