Nyob rau hauv lub tshav pob valve tsim thiab kev tsim khoom, cov txheej txheem deg hardening yog qhov tseem ceeb ntawm cov khoom lag luam lifespan thiab kev ua haujlwm. Tau ntsib nrog cov thev naus laus zis tseem ceeb xws li Carburizing, Nitriding, Carbonitriding, thiab QPQ, yuav ua li cas xaiv cov txheej txheem tsim nyog raws li kev ua haujlwm tshwj xeeb? Kev xaiv tsis raug tuaj yeem ua rau tsis yog rau cov nqi tsis zoo xwb tab sis kuj ua rau kev ua haujlwm tsis zoo.
Cov hauv qab no yog ib qho kev ntsuam xyuas thiab kev xaiv cov lus qhia rau plaub qhov tseem ceeb ntawm cov txheej txheem hardening.
Carburizing: Qhov Kev Xaiv Zoo Tshaj Plaws rau Hnyav - Lub luag haujlwm cuam tshuam rau lub luag haujlwm
Raws li kev siv thev naus laus zis saum npoo tawv tawv tshaj plaws, carburizing suav nrog diffusing carbon atoms rau hauv cov khoom siv saum npoo, ua raws li quenching los ua ib qho siab -hardness martensitic qauv. Cov txheej txheem no zoo kawg nkaus daws qhov tsis sib haum xeeb ntawm qhov chaw hnav tsis kam thiab cov tub ntxhais toughness, ua rau nws qhov kev daws teeb meem zoo tshaj plaws rau cov khoom raug hnyav thiab cuam tshuam loj heev.
Core Advantages:Sib sib zog nqus txheej, siab load-cov kabmob muaj peev xwm, thiab kev cuam tshuam zoo heev.
Key Parameters:Kev ua haujlwm kub yog qhov siab; Cov ntaub ntawv qhov tob ntawm 0.5-2.0mm; deg hardness yog kwv yees li 58-64 HRC; distortion yog qhov tseem ceeb, yuav tsum tau nyob twj ywm machining nyiaj.
Khoom siv:Tsawg carbon steels, qis carbon alloy steels, alloy steels, thiab hmoov metallurgy qhov chaw.
Cov ntawv thov raug:Automotive kis tau tus mob, hnyav- lub luag haujlwm tsav shafts, txuas rods, thiab siab -load valve Cheebtsam.
Nitriding: Qhov Zoo Tshaj Plaws rau Precision Siab - Hnav Cov Cheebtsam
Nitriding siv nitrogen atoms kom diffuse rau hauv txheej txheej. Nws qhov txiaj ntsig tseem ceeb yog nyob rau hauv qis -kev ua haujlwm kub thiab qhov sib txawv tsawg. Txij li thaum quenching tsis tas yuav tsum tau, qhov kev ua haujlwm kub tsuas yog 500-580 degree, kom ntseeg tau tias qhov kev ruaj ntseg siab. Qhov no ua rau nws qhov kev daws teeb meem zoo tshaj plaws rau cov khoom precision thiab cov khoom siv siab hnav.
Core Advantages:Tsis pom zoo distortion, superior hnav tsis kam, thiab zoo heev qaug zog zog.
Key Parameters:Ua haujlwm kub yog 500-580 degree; zoo nitriding txheej qhov tob yog ntiav, feem ntau 0.1-0.6mm; nto hardness yog ntsuas nyob rau hauv Vickers hardness, nrog cov nitride txheej ncav cuag 700-800 HV los yog siab dua.
Khoom siv:Tshwj xeeb nitriding steels, nrog rau cov cuab yeej hlau thiab stainless hlau.
Cov ntawv thov raug:Precision sib tsoo tshuab spindles, siab - precision iav, ntsuas cov cuab yeej, thiab txhaj tshuaj molding tshuab screws.
Carbonitriding: Tus nqi -Kev xaiv zoo rau nruab nrab-Load Cheebtsam
Carbonitriding yog txheej txheem hybrid sib xyaw ua ke carburizing thiab nitriding, qhov twg carbon thiab nitrogen atoms diffuse ib txhij. Nws khaws cov ntaub ntawv tob tob ntawm carburizing thaum nqus cov hnav tsis kam thiab tiv thaiv -scuffing zog ntawm nitriding, ua kom muaj kev sib npaug ntawm kev ua tau zoo thiab tus nqi.
Core Advantages:Ua ke hnav tsis kam nrog kev tiv thaiv -galling zog; kev ua haujlwm ntau dua li carburizing nrog tsawg distortion.
Key Parameters:Ua haujlwm kub yog 820-880℃(qis dua carburizing); cov ntaub ntawv zoo qhov tob yog nruab nrab, xws li 0.2-0.8mm; deg hardness yog 58-64 HRC, me ntsis siab dua carburizing ib leeg.
Khoom siv:Cov pa roj carbon tsawg thiab cov hlau tsis tshua muaj carbon hlau (xws li 20, 45, 40Cr).
Cov ntawv thov raug:Cov iav me me mus rau nruab nrab, qag, thiab cov cams ua rau hauv cov khoom siv rau kev siv tsheb thiab tshuab cuab yeej.
QPQ: Qhov Kev Xaiv Zoo Tshaj Plaws rau Dual Wear thiab Corrosion Resistance
QPQ (Salt Bath Nitrocarburizing + Salt Bath Oxidation) yog cov txheej txheem kev kho deg sib xyaw. Nws tsis tsuas yog imparts siab heev saum npoo hardness tab sis kuj muab corrosion kuj los ntawm ib tug ntom oxide zaj duab xis nyob rau saum npoo, ua tiav ib tug dual breakthrough nyob rau hauv hnav tsis kam thiab xeb tiv thaiv.
Core Advantages:Kev tiv thaiv corrosion zoo heev, hnav siab thiab tiv thaiv -kev ua haujlwm siab, thiab kev cuam tshuam tsawg heev vim qis- ua haujlwm kub.
Key Parameters:Nitriding theem ntawm 520-580 degree, oxidation theem ntawm 350-430 degree; compound txheej thickness ntawm 10-25μm, diffusion txheej tob ntawm 0.1-0.5mm; Kev tsim ntawm Fe₃O₄ oxide zaj duab xis muab cov ntsev tsuag muaj zog tiv thaiv corrosion.
Khoom siv:Muaj feem xyuam rau nruab nrab / qis carbon steels thiab alloy steels; tshwj xeeb tshaj yog zoo rau stainless hlau.
Cov ntawv thov raug:High- lub zog fasteners, precision shafts, pwm, hydraulic rods, thiab hnav-cov khoom tiv thaiv kev ua haujlwm nyob rau hauv ib puag ncig corrosive.
Summary and Selection Logic
Txhawm rau pab txhawb kev sib piv, peb tau sau cov ntsiab lus tseem ceeb ntawm plaub txheej txheem hauv qab no.
Kev sib piv kev ntsuas ntawm qhov ntsuas
Ua Haujlwm Kub:Carburizing (930-950 degree) > Carbonitriding (820-880 degree) > Nitriding (500-580 degree) ≈ QPQ (520-580 degree)
Case Qhov tob:Carburizing (Deepest) > Carbonitriding (Moderate) > Nitriding / QPQ (dhau)
Nto Hardness:QPQ Txheej Txheej & Carburizing> Carbonitriding & Nitriding
Qib Distortion:Carburizing (High) > Carbonitriding (Moderate) > Nitriding / QPQ (tsawg kawg)
Corrosion Resistance:QPQ (Zoo heev) > Nitriding > Carbonitriding > Carburizing
Engineer's Selection Guide
Heavy load, siab cuam tshuam, sib sib zog nqus hardening yuav tsum tau:Xaiv Carburizing yam tsis muaj hesitation.
Precision qhov chaw, siab hnav tsis kam, xoom distortion:Nitriding yog koj qhov kev xaiv zoo tshaj plaws.
Nruab nrab load, loj ntau lawm, tus nqi -zoo:Ua ntej Carbonitriding.
Yuav tsum tau hnav thiab corrosion kuj nrog complex geometry:QPQ yog qhov kev daws teeb meem zoo tshaj plaws.
Yog tias koj muaj lus nug txog kev tshaj lij, thov hu rau NSV.
