Kev kho cua sov txheej txheem ntawm hmoov hlau metallurgy

Kev kho cua sov txheej txheem ntawm hmoov hlau metallurgy

Kev kho cua sov ntawm cov hmoov metallurgy cov ntaub ntawv yuav tsum tau txiav txim siab raws li lawv cov tshuaj muaj pes tsawg leeg thiab cov nplej loj, thiab qhov muaj nyob ntawm qhov pores yog qhov tseem ceeb. Nyob rau hauv cov txheej txheem ntawm nias thiab sintering, pores khiav los ntawm tag nrho ib feem, thiab lub hav zoov ntawm pores cuam tshuam rau txoj kev thiab cov nyhuv ntawm kev kho cua sov. Yog li, dab tsi yog cov txheej txheem kev kho cua sov ntawm cov hmoov hlau metallurgy? Zhugwei precision hmoov metallurgy ua cov kws tshaj lij cov lus teb:

1. Chav kho mob

   
   

Kev kho chav dej yog txhawm rau oxidize qhov saum npoo ntawm cov ntaub ntawv los ntawm cua sov chav, tsim oxide zaj duab xis rau ntawm cov khoom siv, yog li txhim kho kev ua haujlwm ntawm cov khoom siv hmoov hlau. Tshwj xeeb tshaj yog rau kev tiv thaiv corrosion ntawm qhov chaw ntawm cov ntaub ntawv hlau metallurgy, nws lub sijhawm siv tau yog qhov pom tseeb dua li kev kho bluing, thiab hardness thiab hnav tsis kam ntawm cov khoom siv kho mob tau nce ntxiv.

2. Kev kho cua sov tshwj xeeb

Cov txheej txheem kev kho cua sov tshwj xeeb yog cov khoom lag luam ntawm kev tshawb fawb thiab thev naus laus zis hauv xyoo tas los no, suav nrog induction cua sov quenching, laser nto hardening, thiab lwm yam. Induction cua sov quenching yog nyob rau hauv lub zog ntawm high-frequency electromagnetic induction eddy tam sim no, cov cua kub kub nce sai, uas. muaj qhov cuam tshuam tseem ceeb ntawm qhov nce ntawm qhov tawv tawv, tab sis nws yog qhov yooj yim kom pom cov pob muag muag. Feem ntau, cov cua sov tsis sib xws tuaj yeem siv los txuas ntxiv lub sijhawm austenitizing; Laser nto hardening txheej txheem siv laser raws li lub tshav kub qhov chaw kom sai sai thiab txias cov hlau nto, thiaj li hais tias lub substructure nyob rau hauv lub austenite grain yuav tsis tau zoo tu qab tso thiab recrystallized kom tau ultra-zoo qauv.

Hmoov metallurgy ua

3. Kev kho cua sov txheej txheem

Vim tias muaj qhov pores, qhov kub hloov pauv ntawm cov hmoov hlau metallurgy yog qis dua li cov ntaub ntawv compact, yog li lub hardenability kuj tsis zoo thaum lub sij hawm quenching. Tsis tas li ntawd, qhov sintering ceev ntawm cov khoom siv hmoov yog proportional rau thermal conductivity ntawm cov khoom thaum quenching; Vim tias qhov sib txawv ntawm cov txheej txheem sintering thiab cov ntaub ntawv ntom ntom, qhov homogeneity ntawm cov khoom siv hauv cov hmoov hlau metallurgy zoo dua li cov ntaub ntawv ntom ntom, tab sis muaj qhov sib txawv me me hauv micro cheeb tsam. Yog li ntawd, lub sij hawm ua tiav austenitizing yog 50 feem pua ​​​​ntev ntev dua li ntawm cov khoom sib txuas. Thaum cov ntsiab lus alloy ntxiv, qhov ua tiav austenitizing kub yuav siab dua thiab lub sijhawm yuav ntev dua.

Nyob rau hauv kev kho cua sov ntawm hmoov metallurgy cov ntaub ntawv, txhawm rau txhim kho hardenability, qee cov hlau alloy xws li npib tsib xee, molybdenum, manganese, chromium, vanadium, thiab lwm yam. Lawv lub luag haujlwm yog tib yam li cov khoom siv ntom ntom, thiab lawv tuaj yeem pom tseeb ua kom cov nplej. Thaum lawv yaj hauv austenite, qhov kev ruaj ntseg ntawm undercooled austenite yuav nce, thiab kev hloov pauv ntawm austenite thaum lub sij hawm quenching yuav tsum tau ua kom tiav, yog li ntawd lub hardness ntawm cov khoom tom qab quenching thiab hardening qhov tob kuj yuav nce. Ntxiv mus, tag nrho cov ntaub ntawv P / M yuav tsum tau tempered tom qab quenching. Kev tswj qhov kub thiab txias ntawm kev kho cua sov muaj qhov cuam tshuam zoo rau kev ua haujlwm ntawm P / M cov ntaub ntawv. Yog li ntawd, qhov kub thiab txias yuav tsum tau txiav txim siab raws li cov yam ntxwv ntawm cov khoom sib txawv kom txo tau qhov cuam tshuam ntawm tempering brittleness. Feem ntau, cov ntaub ntawv tuaj yeem tempered rau {{0}} 5-1.0h hauv huab cua lossis roj ntawm 175-250 degree .

4. Cov txheej txheem kev kho cua sov

Kev kho cua sov feem ntau suav nrog peb cov txheej txheem yooj yim: decomposition, absorption thiab diffusion. Piv txwv li, cov tshuaj tiv thaiv ntawm carburizing kev kho cua sov yog raws li nram no:

2CO ≈ [C] ntxiv rau CO2 (exothermic cov tshuaj tiv thaiv)

CH4 ≈ [C] ntxiv rau 2H2 (endothermic cov tshuaj tiv thaiv)

Tom qab cov carbon yog decomposed, nws yog absorbed los ntawm cov hlau nto thiab maj diffuses rau sab hauv. Tom qab tau txais cov pa roj carbon ntau txaus rau ntawm cov khoom siv saum npoo, quenching thiab tempering yuav txhim kho qhov tawv tawv thiab hardening qhov tob ntawm hmoov metallurgy cov ntaub ntawv. Vim muaj cov pores nyob rau hauv cov hmoov metallurgy cov ntaub ntawv, activated carbon atoms infiltrate los ntawm lub nto mus rau hauv lub sab hauv kom tiav cov txheej txheem ntawm tshuaj kho cua sov. Txawm li cas los xij, cov khoom siv ntom ntom ntom ntom ntom, tus qaug zog lub pore nyhuv, thiab qhov pom tseeb tsawg ntawm kev kho cua sov. Yog li ntawd, ib qho kev txo qis cua uas muaj peev xwm ntau dua yuav tsum tau siv los tiv thaiv. Raws li lub pore yam ntxwv ntawm cov hmoov hlau metallurgy cov ntaub ntawv, cov cua kub thiab txias ceev yog qis dua cov ntaub ntawv compact, yog li lub sij hawm tuav thiab cua sov yuav tsum tau ncua thaum lub sij hawm cua sov.

Kev kho cua sov tshuaj ntawm cov hmoov hlau metallurgy cov ntaub ntawv suav nrog carburizing, nitriding, sulfurizing thiab ntau cov ntsiab lus nkag. Hauv kev kho cua sov tshuaj, qhov tob hardening feem ntau cuam tshuam nrog qhov ntom ntawm cov ntaub ntawv. Yog li ntawd, cov kev ntsuas sib raug tuaj yeem raug coj mus rau hauv cov txheej txheem kev kho cua sov, piv txwv li, thaum carburizing, lub sijhawm tuaj yeem tsim nyog txuas ntxiv thaum cov khoom siv ntom ntom ntau dua 7g / cm3. Kev puas tsuaj ntawm cov ntaub ntawv tuaj yeem txhim kho los ntawm kev kho cua sov. Cov txheej txheem tsis yog austenitic carburizing txheej txheem ntawm hmoov metallurgy cov ntaub ntawv ua rau cov pa roj carbon ntsiab lus nyob rau saum npoo ntawm carburized txheej ntawm cov ntaub ntawv kho mob ncav cuag ntau tshaj 2 feem pua, thiab cov carbides sib npaug faib rau saum npoo ntawm carburized txheej, uas tuaj yeem txhim kho tau zoo. lub hardness thiab abrasion kuj.

Cov saum toj no yog hais txog kev kho cua sov txheej txheem ntawm hmoov metallurgy ntawm Zhongwei Precision. Cov txheej txheem kev kho cua sov ntawm cov hmoov hlau metallurgy yog cov txheej txheem nyuaj. Kev kho cua sov ntawm cov hmoov metallurgy cov ntaub ntawv suav nrog cov txheej txheem saum toj no quenching tshav kub kev kho mob, tshuaj kho cua sov, chav kho mob thiab kev kho cua sov tshwj xeeb.