Vim li cas cov kav hlau yuav tsum tau kho cua sov?

Kev ua haujlwm ntawm kev kho cua sov yog txhawm rau txhim kho cov khoom siv kho tshuab ntawm cov yeeb nkab steel, tshem tawm cov kev ntxhov siab seem thiab txhim kho nws cov kev ua tau zoo.

Raws li cov hom phiaj sib txawv ntawm kev kho cua sov, txheej txheem kev kho cua sov tuaj yeem muab faib ua ob pawg: kev kho cua sov ua ntej thiab kev kho cua sov kawg.

1. Kev kho cua sov ua ntej

Lub hom phiaj ntawm kev kho cua sov ua ntej yog txhawm rau txhim kho lub tshuab ua haujlwm, tshem tawm cov kev ntxhov siab sab hauv thiab npaj cov qauv zoo metallographic rau kev kho cua sov zaum kawg.Nws cov txheej txheem kho cua sov muaj xws li annealing, normalizing, laus, quenching thiab tempering, thiab lwm yam.

(1) Annealing thiab normalizing

Annealing thiab normalizing yog siv rau kub ua hauj lwm blanks.Rau cov pa roj carbon steel thiab alloy steel nrog cov ntsiab lus carbon ntau dua 0.5%, kev kho annealing feem ntau yog siv los txo nws cov hardness thiab yooj yim txiav;Rau cov pa roj carbon steel thiab alloy steel nrog cov ntsiab lus carbon tsawg dua 0.5%, normalizing kev kho mob yog saws nyob rau hauv thiaj li yuav tsis txhob lo rau lub cuab tam thaum txiav.Nws yog feem ntau npaj tom qab kev tsim khoom tsis muaj thiab ua ntej machining ntxhib.

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(2) Kev laus kev kho mob

Kev laus kev kho mob feem ntau yog siv los tshem tawm cov kev ntxhov siab sab hauv uas tsim los ntawm kev tsim khoom thiab machining.

Txhawm rau kom tsis txhob muaj kev thauj mus los ntau dhau, rau qhov chaw uas muaj qhov tseeb, kev kho kev laus tuaj yeem npaj ua ntej ua tiav.Txawm li cas los xij, rau qhov chaw uas yuav tsum tau muaj qhov tseeb, ob lossis ntau dua txheej txheem kev laus yuav tsum tau npaj.Kev laus kev kho mob feem ntau tsis tas yuav tsum tau rau qhov yooj yim.

(3) Kev kho cua sov

Quenching thiab tempering yog hais txog qhov kub thiab txias kev kho mob tom qab quenching.Nws tuaj yeem tau txais cov qauv zoo thiab zoo tempered sorbite thiab npaj rau kev txo qis deformation thaum lub sij hawm deg quenching thiab nitriding kev kho mob yav tom ntej.Yog li ntawd, quenching thiab tempering kuj siv tau raws li kev kho cua sov ua ntej.

2. Kev kho cua sov kawg

Lub hom phiaj ntawm kev kho cua sov zaum kawg yog los txhim kho cov khoom siv kho tshuab xws li hardness, hnav tsis kam thiab lub zog.

(1) Quenching

quenching muaj xws li nto quenching thiab ib qho quenching.Ntawm lawv, nto quenching yog dav siv vim nws me me deformation, oxidation thiab decarburization.Tsis tas li ntawd, nto quenching kuj muaj qhov zoo ntawm lub zog sab nraud, zoo hnav tsis kam, zoo sab hauv toughness thiab muaj zog cuam tshuam.

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(2) Carburizing quenching

Carburizing thiab quenching muaj feem xyuam rau cov hlau tsis tshua muaj carbon thiab cov hlau tsis tshua muaj hlau.Ua ntej, ua kom cov pa roj carbon ntsiab lus ntawm cov txheej txheej saum npoo ntawm cov khoom, thiab tau txais cov tawv tawv siab tom qab quenching, thaum cov tub ntxhais tseem tuav tau qee lub zog thiab siab toughness thiab plasticity.

(3) Kev kho Nitriding

Nitriding yog ib txoj kev kho mob kom cov nitrogen atoms nkag mus rau hauv cov hlau nto kom tau ib txheej ntawm nitrogen-muaj cov tebchaw.Nitriding txheej tuaj yeem txhim kho hardness, hnav tsis kam, qaug zog lub zog thiab corrosion kuj ntawm qhov chaw.Raws li qhov ntsuas kub ntawm nitriding yog qis, qhov deformation me me, thiab txheej nitriding yog nyias (feem ntau tsis ntau tshaj 0.6 ~ 0.7mm), cov txheej txheem nitriding yuav tsum tau teem caij lig li sai tau.Txhawm rau txo qhov deformation thaum lub sij hawm nitriding, qhov kub-kub tempering kom tshem tawm kev ntxhov siab feem ntau yuav tsum tau tom qab txiav.


Post lub sij hawm: Mar-04-2022