Taw qhia rau Carburizing txheej txheem

Carburizing yog ib qho kev siv cov txheej txheem deg hardening tsim los ua kom cov pa roj carbon monoxide nyob rau saum npoo ntawm cov khoom hlau, yog li txhim kho lawv cov tawv tawv, hnav tsis kam, thiab qaug zog. Cov txheej txheem no tshwj xeeb tshaj yog tsim rau cov khoom uas yuav tsum tau ua kom tawv tawv, xws li lub zog, bearings, thiab piston pins.

Cov kauj ruam yooj yim ntawm cov txheej txheem Carburizing

Kev kho mob ua ntej:

Ntxuav: Ntxuav lub ntsej muag ntawm cov khoom hlau kom tshem tawm cov oxides, roj, thiab lwm yam impurities los xyuas kom meej qhov ua tau zoo ntawm cov txheej txheem carburizing.

Cua sov: Ua kom sov cov khoom siv hlau mus rau qhov ntsuas kub uas tsim nyog, feem ntau ntawm 850 degree thiab 950 degree, kom cov pa roj carbon diffuse zoo rau hauv cov hlau.

Carburizing:

Cov pa roj carbon ntxiv: Muab cov khoom siv hlau tso rau hauv ib puag ncig uas muaj cov pa roj carbon. Cov pa roj carbon ntau muaj xws li cov pa roj carbon monoxide (piv txwv li, methane), cov khoom siv carbon (piv txwv li, carbon hmoov), thiab cov pa roj carbon kua (piv txwv li, calcium carbide). Cov pa roj carbon monoxide tso tawm cov pa roj carbon atom ntawm qhov kub thiab txias, uas cuam tshuam rau hauv cov hlau.

Diffusion: Thaum kub siab, carbon atoms diffuse rau hauv cov hlau nto thiab nkag mus rau hauv cov hlau, tsim cov pa roj carbon nplua nuj txheej.

Txias:

Quenching: Ceev ceev cov carburized hlau Cheebtsam kom hardness. Feem ntau, dej, roj, lossis cua yog siv los ua qhov nruab nrab quenching.

Tempering: Txhawm rau txo cov kev ntxhov siab sab hauv tsim thaum lub caij txias thiab ua kom zoo dua hardness thiab toughness, cov khoom siv hlau feem ntau raug tempering. Cov txheej txheem no suav nrog cua sov cov khoom kom qis dua (nyob ib puag ncig 150 degree txog 200 degree) thiab tom qab ntawd maj mam txias.

Cov yam ntxwv thiab qhov zoo ntawm cov txheej txheem Carburizing

Nce Nto Hardness: Carburizing ho nce qhov hardness ntawm cov hlau Cheebtsam, ua rau lawv ntau resistant rau hnav thiab corrosion.

Txhim kho Fatigue Resistance: Cov txheej txheem carburized txhim kho cov khoom tiv thaiv kev qaug zog nyob rau hauv cov xwm txheej siab.

Txhim kho Impact Resistance: Cheebtsam raug rau quenching thiab tempering kev kho mob pom zoo cuam tshuam tsis kam, haum rau high-kev cuam tshuam load daim ntaub ntawv.

Daim ntawv thov

Automotive Kev Lag Luam: Siv rau lub zog, crankshafts, camshafts, thiab lwm yam, los txhim kho lawv cov hnav tsis kam thiab ua haujlwm ntev.

Machinery Manufacturing: Siv rau cov khoom siv siab thiab kev sib txhuam, xws li cov kabmob, lub zog, thiab cov cuab yeej.

Aerospace Kev Lag Luam: Txhim kho deg hardness thiab qaug zog tiv thaiv ntawm cov khoom tiv thaiv kev ua haujlwm hnyav.

Carburizing zoo txhim kho kev ua haujlwm ntawm cov khoom siv hlau, ua rau lawv tsim nyog rau cov ntawv thov siab.

Tej yam tsis xws luag thiab kho hauv Carburizing

1. Loj lossis Networked Carbide Particles hauv Carburized Txheej

Ua rau: High deg carbon concentration.

Cov pa roj carbon ntau ntxiv hauv cov pa roj carburizing.

Tshaj-enrichment ntawm carbon nyob rau hauv tswj cua carburizing.

Cov ntsiab lus siab cyanide hauv cov kua carburizing da dej.

Txias qeeb tom qab carburizing.

Kev kho mob:

Txo cov pa roj carbon concentration ntawm qhov chaw, tswj cov pa roj carbon ntxiv thaum lub sij hawm diffusion, thiab kho cov av noo.

Txo cov pa roj carbon additives hauv cov khoom carburizing.

Txo cov ntsiab lus cyanide hauv cov kua carburizing.

Ua kom txias txias tom qab carburizing lossis nce quenching kub thiab sijhawm.

Siv ntau yam quenching los yog normalize ua ntej quenching, ua raws li high-temperature tempering.

2. Ntau dhau Austenite Residual

Ua rau:

ruaj khov austenite nrog siab carbon thiab alloy ntsiab.

Tsis txaus tempering, ua rau austenite ruaj khov.

Maj mam txias tom qab tempering.

Kev kho mob:

Ua kom zoo ntawm qhov chaw carbon concentration.

Txo lub quenching kub los yog reheat rau quenching.

Temper ntawm qhov kub qis tom qab los ntawm kev ua kom txias sai.

Rov ua dua thiab quench dua lossis ua kom kub kub kub ua raws li quenching.

3. Nto Decarburization

Ua rau:

Tsawg carbon muaj peev xwm nyob rau hauv cov pa thaum lub sij hawm tom qab theem ntawm cov pa carburizing.

Ua kom txias qeeb tom qab cov khoom carburizing.

Ntxiv cua txias lub sij hawm tom qab carburizing.

Tsis muaj kev tiv thaiv thaum lub sij hawm txias los yog cua tsis zoo nyob rau hauv cov cua rauv taws.

Kev kho mob:

Ntxiv carburizing nrog cov peev xwm carbon tsim nyog.

Ua kev txhaj tshuaj peening tom qab quenching.

Tso cai rau kev sib tsoo nyiaj rau ntawm qhov loj.

4. Dub Bainite tsim tom qab quenching

Ua rau: Cov ntsiab lus oxygen siab hauv carburizing nruab nrab, ua rau tsim cov oxides.

Kev kho mob:

Tswj cov pa oxygen nyob rau hauv lub qhov cub cua.

Siv txhaj tshuaj peening ua ib qho kev kho mob.

Txhim khu lub peev xwm txias ntawm qhov nruab nrab quenching.

5. Tshaj Ferrite nyob rau hauv cov tub ntxhais, ua rau tsawg hardness

Ua rau:

Tsawg quenching kub.

Tsis txaus tuav lub sij hawm thiab txias npaum li cas thaum reheat quenching.

Muaj cov khoom tsis muaj ferrite lossis austenite decomposition khoom hauv cov tub ntxhais.

Kev kho mob:

Reheat thiab quench raws li tus txheej txheem txheej txheem.

Ua kom quenching kub thiab tuav lub sij hawm.

6. Tsis txaus Carburizing qhov tob

Ua rau:

Qhov kub ntawm lub cub tawg qis thiab tuav lub sijhawm luv.

Tsawg carbon cov ntsiab lus ntawm carburizing agents.

Gas to hauv qhov cub.

Tsis muaj qhov sib xyaw ntawm ntsev da dej lossis kev thauj khoom ntau dhau hauv qhov cub.

Deg oxidation los yog carbon tsub zuj zuj.

Kev kho mob:

Kho cov carburizing kub, lub sij hawm, thiab tus neeg saib xyuas tus nqi raws li xav tau.

Tsis tu ncua tshuaj xyuas thiab tswj cov cua sov tej yam kev mob.

Xyuas kom cov khoom huv si ua ntej carburizing.

Ntxiv carburizing yog tias txheej nyias dhau.

7. Tsis sib xws Carburizing qhov tob

Ua rau:

Lub qhov cub kub tsis sib xws.

Cov huab cua tsis zoo nyob hauv qhov cub.

Carbon dub tsub zuj zuj ntawm qhov chaw.

Qhov kub thiab txias sib txawv hauv cov thawv carburizing khoom lossis cov pa roj carbon tsis sib xws.

Nto xeb los yog roj stains.

Qhov tsis sib xws ntawm qhov roughness lossis qhov sib nrug.

Kev kho mob:

Ua tib zoo ntxuav qhov chaw ua ntej carburizing.

Tshem cov pa roj carbon dub los ntawm lub qhov cub.

Xyuas kom meej txawm tias qhov sib nrug thiab qhov clamping kom raug.

Tsis tu ncua xyuas qhov kub thiab txias uniformity thiab cua sov tej yam kev mob.

8. Tsawg Deg Hardness

Ua rau:

Cov pa roj carbon concentration tsawg.

Siab residual austenite.

Tsim cov qauv bainitic.

Cov kub quenching siab ua rau ntau dhau austenite lossis qis kub quenching.

High tempering kub.

Kev kho mob:

Ntxiv carbon yog tias qhov concentration tsawg.

Reheat thiab quench yog tias muaj ntau dhau ntawm austenite.

Rov ua dua thiab tua dua yog tias muaj bainite.

Ua raws li cov txheej txheem kho cua sov kom raug.

9. Nto Corrosion thiab Oxidation

Ua rau:

Impurities nyob rau hauv carburizing cov neeg ua hauj, xws li dej los yog sulfur.

Gas to los yog paug hauv cov khoom carburizing.

Kev tiv thaiv tsis txaus thaum lub caij txias txias.

Tsis tiav deoxidation nyob rau hauv ntsev da dej los yog tsis muaj kev tiv thaiv cua sov nyob rau hauv cov cua rauv taws.

Qhov chaw qias neeg.

Kev kho mob:

Tswj cov muaj pes tsawg leeg ntawm carburizing cov neeg ua hauj thiab ntsev.

Tsis tu ncua xyuas cov khoom foob thiab kev huv.

Ntxuav cov khoom tam sim ntawd thiab ua raws li cov txheej txheem kev qhuab qhia.

10. Cracking ntawm Carburized Parts

Ua rau:

Kev txias qeeb ua rau cov theem tsis sib xws.

Khaws austenite hloov mus rau hauv martensite, ua rau muaj kev ntxhov siab.

Cov cua txias ntau dhau los yog cov duab sib txawv thaum pib quenching.

High alloy cov ntsiab lus nrog cov ntsiab lus txhawb hardenability.

Kev kho mob:

Ua kom txias txias tom qab carburizing kom ntseeg tau tias kev hloov pauv tiav.

Ua kom ceev cov cua txias tom qab quenching kom tau martensite thiab residual austenite.

Optimize quenching tej yam kev mob thiab kev kho cua sov txheej txheem.

Lub tshuab ua ntej cov khoom siv ntau dhau kom tsis txhob deformation ntau dhau.

11. Hydrogen Embrittlement nyob rau hauv High-Alloy Steels

Ua rau:

High hydrogen ntsiab lus nyob rau hauv lub cub tawg cua.

Tshaj carburizing kub uas txhawb nqa hydrogen diffusion.

Direct quenching tsis cia hydrogen diffuse tawm.

Kev kho mob:

Ua kom txias tom qab carburizing.

Ceev tempering saum 250 degree tom qab quenching.

Nres carburizing mov ua ntej tshem cov khoom ntawm lub qhov cub thiab yaug nrog nitrogen.

12. Tsawg Carbon Concentration hauv Carburizing Txheej

Ua rau:

Tsawg carbon peev xwm nyob rau hauv lub cub tawg, qhov kub thiab txias, thiab tsis txaus carbon ntxiv.

Cov pa roj carbon dub npog lossis kev thauj khoom ntau dhau.

Cov cua kub tsis sib xws thiab cua sov siab siab.

Tsis txaus sib nrug ntawm qhov chaw.

Decarburization thaum txias.

Kev kho mob:

Tsis tu ncua xyuas qhov kub thiab txias ntawm lub cub tawg.

Xyuas kom muaj cua sov zoo thiab lub siab.

Tiv thaiv kom tsis txhob xau thiab tswj cov cua kom zoo.

Xyuas kom muaj qhov sib nrug txaus ntawm qhov chaw.

13. Tshaj Carburizing Txheej Thickness

Ua rau:

High carburizing kub thiab tuav lub sij hawm ntev.

Cov pa roj carbon ntau ntxiv.

Kev kuaj tsis raug.

Kev kho mob:

Kho cov txheej txheem tsis pub dhau lub thickness.

Yog tias thickness tshaj qhov specifications, kev txiav txim yuav tsum tau.