Lub taub hau lub tog raj kheej yog ib qho tseem ceeb ntawm lub cav combustion sab hauv siv los kaw lub tog raj kheej thiab tsim lub combustion chamber, feem ntau yog ua los ntawm cov khoom zoo grey cam khwb cia hlau los yog alloy cam khwb cia hlau casting. Hauv qab no yog cov ntaub ntawv hais txog grey cam khwb cia hlau lub tog raj kheej taub hau:
Kev siv grey cam khwb cia hlau lub tog raj kheej taub hau
Lub luag haujlwm tseem ceeb ntawm grey cam khwb cia hlau lub tog raj kheej taub hau yog kaw lub tog raj kheej, thiab lub piston ua ke los tsim qhov chaw combustion, thiab dais lub luag haujlwm ntawm qhov kub thiab txias siab. Nws tseem yog lub luag haujlwm rau kev txhim kho ntau yam khoom siv ntawm lub cav diesel, xws li roj injector, inlet thiab qhov hluav taws xob valve ntaus ntawv, thiab lwm yam, thiab npaj cov inlet thiab tso pa tawm, cov dej txias, thiab lwm yam.
Grey cam khwb cia hlau lub tog raj kheej taub hau raug txheej txheem
Kev tsim cov txheej txheem ntawm grey cam khwb cia hlau lub tog raj kheej taub hau suav nrog tsib qhov txuas: pwm ua, melting, casting, machining thiab kev soj ntsuam zoo. High-frequency induction rauv yog siv rau melting kom paub meej alloy muaj pes tsawg leeg, CNC tshuab cuab yeej thiab lwm yam khoom siv rau zoo machining, thiab thaum kawg cov khoom yog tag nrho cov tshuaj xyuas thiab kuaj.
Grey cam khwb cia hlau lub tog raj kheej taub hau tsim yuav tsum
Cov qauv tsim ntawm grey cam khwb cia hlau lub tog raj kheej taub hau muaj xws li txaus rigidity thiab lub zog, me me deformation, thiab lav sealing. Nyob rau tib lub sijhawm, nws yog ib qho tsim nyog yuav tsum tau npaj lub combustion chamber, li qub thiab airways kom ntseeg tau tias kev ua haujlwm ntawm lub cav. Tsis tas li ntawd, qhov kev ua tau zoo yog qhov zoo, thiab qhov kub thiab txias yog qhov sib xws li qhov ua tau kom txo tau cov thermal stress thiab tsis txhob thermal cracking.
Lub tog raj kheej lub taub hau yog ib qho tseem ceeb ntawm lub cav, nws cov combustion chamber tiv taus lub cav ua haujlwm ze li ntawm 70 MPa siab thiab ze li ntawm 300 degree phab ntsa kub, qhov chaw ua haujlwm hnyav heev.
Cov kev cai ntawm grey cam khwb cia hlau lub tog raj kheej taub hau ntawm hardness yog feem ntau muaj feem xyuam rau lub tensile lub zog ntawm nws cov khoom thiab hardness tus nqi ntawm tej qhov chaw los xyuas kom meej nws kev ntseeg tau thiab kev ua tau zoo nyob rau hauv lub internal combustion engine.
Hardness yuav tsum tau rau grey cam khwb cia hlau lub tog raj kheej taub hau
- Cov khoom yuav tsum tau muaj: grey cam khwb cia hlau lub tog raj kheej taub hau thiab lub cev siv grey cam khwb cia hlau qib yuav tsum tsis txhob qis dua qib HT200 teev nyob rau hauv GB / T9439, thiab nws tensile lub zog yuav tsum siab tshaj los yog sib npaug zos rau 200MPa.
- Qhov tshwj xeeb ntawm qhov yuav tsum tau ua kom tawv tawv: qhov nyuaj ntawm ob lub dav hlau ntawm lub cev thiab lub tog raj kheej lub taub hau yuav tsum tau siv los ua cov khoom kuaj xyuas, thiab nws cov nqi hardness yuav tsum ncav cuag 170 ~ 241HBS. qhov sib txawv hardness ntawm tib lub tog raj kheej lub taub hau thiab lub cev yuav tsum tsawg dua los yog sib npaug rau 50HBS.
Cov yam ntxwv cuam tshuam rau qhov hardness ntawm grey cam khwb cia hlau lub tog raj kheej taub hau yog:
- Tus nqi ntawm npua hlau ntxiv: qhov ntau dua cov npua hlau ntxiv, qhov pom tseeb dua qhov txo qis ntawm qhov tawv tawv ntawm lub tog raj kheej taub hau.
- Kev laus kev kho mob kub: kev laus kho qhov kub thiab txias muaj qhov cuam tshuam tseem ceeb ntawm qhov nyuaj ntawm grey cam khwb cia hlau lub tog raj kheej taub hau.
- Ntxiv ntawm tus yug me nyuam: qhov sib ntxiv ntawm cov yug me nyuam yuav cuam tshuam cov ntsiab lus pearlitic ntawm grey cam khwb cia hlau, uas nyob rau hauv lem cuam tshuam rau hardness.
- Melting superheat kub: melting superheat kub yog siab dhau lawm yuav ua rau grey cam khwb cia hlau nyob rau hauv graphite daim ntawv phem, cuam tshuam lub hardness.
Lub hardness yuav tsum tau ntawm grey cam khwb cia hlau lub tog raj kheej taub hau tsis tsuas yog muaj lub tensile lub zog ntawm cov khoom, tab sis kuj muaj xws li hardness tus nqi ntawm tej yam. Nyob rau tib lub sijhawm, cov yam ntxwv cuam tshuam rau qhov hardness suav nrog tus nqi ntawm npua hlau ntxiv, kev laus kev kho mob kub, tus nqi ntawm inoculant ntxiv thiab melting superheating kub, thiab lwm yam. Cov yam tseem ceeb no yuav tsum tau tswj nruj me ntsis hauv cov txheej txheem ntau lawm.
Feem ntau hais lus, lub hardness thiab grey cam khwb cia hlau tensile lub zog loj, hnav tsis kam yog zoo correlated, thiab hardness thiab txiav kev ua tau zoo tsis zoo correlated, uas yog, cam khwb cia hlau hardness nce nyob rau tib lub sij hawm, tensile zog nce, hnav kuj yog siab, tab sis txiav kev ua tau zoo yog txo. Yog li ntawd, kev lag luam hardness feem ntau yog siv los ua ib qho kev ntsuas ntawm cam khwb cia hlau machinability ntawm tus qauv. Hardness tus nqi kuj tseem siv los ua casting ntau lawm thiab qhov chaw ua cov tog neeg los txheeb xyuas qhov kev ua tau zoo ntawm cov ntaub ntawv siv tseem ceeb, tab sis cov txheej txheem tsim tawm tiag tiag, los ntawm lub sijhawm dhau mus yuav ntsib qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv. tus nqi tsis zoo ib yam tshwm sim.
Grey cam khwb cia hlau lub tog raj kheej taub hau hardness kev ruaj ntseg yog tsuas yog los ntawm kev tswj cov tshuaj muaj pes tsawg leeg, optimization ntawm melting txheej txheem, thiab tsim nyog gestation kho kom tiav. Cov hauv qab no yog cov ncauj lus kom ntxaws guarantee thiab cov ntaub ntawv ntsig txog:
Lub hardness ntawm grey cam khwb cia hlau lub tog raj kheej taub hau tuaj yeem lav tau los ntawm cov txheej txheem hauv qab no thaum lub sijhawm tsim khoom
- Cov khoom siv hluav taws xob sib faib: kev siv cov npua hlau, cov khoom siv hlau, cov khoom siv hluav taws xob tawg thiab cov txheej txheem ntawm cov carburant, kev siv cov nitrogen hauv cov carburant los hloov daim ntawv thiab ntev ntawm graphite los txhim kho cov hardness ntawm grey hlau castings.
- Tswj cov tshuaj muaj pes tsawg leeg: tswj lub hardness los ntawm kev kho cov ntsiab lus ntawm carbon, silicon, manganese thiab lwm yam ntsiab lus, cov ntsiab lus ntawm leej faj thiab phosphorus yuav tsum tau tswj nyob rau hauv qis theem.
- Kua hlau superheating: nce cov kua hlau kub nyob rau hauv ib tug tej yam ntau yam yuav ua tau lub graphite refinement, ntom matrix organisation, yog li txhim kho lub tensile zog thiab Brinell hardness ntawm cam khwb cia hlau.
- Inoculant thiab inoculation txoj kev: maj mam ntxiv inoculant (feem ntau siv 75Si-Fe) rau cov hlau tom qab tawm hauv lub cub tawg, grey cam khwb cia hlau tom qab inoculation kev kho mob, lub hardness yuav zoo li qub, txhim kho kev ua tau zoo ntawm machining.
Yog tias koj txaus siab rau grey hlau lub tog raj kheej taub hau uas tsim los ntawm WELONG, thov hu rau kuv ntawm tammy@welongchina.com.