Kev tshuaj xyuas qhov tsis xws luag ntawm cov hlau hmoov txhaj tshuaj molding

Hlau hmoov txhaj tshuaj molding (MIM) yog ib hom molding txheej txheem uas txhaj cov yas sib tov tau los ntawm kev sib xyaw binder thiab hlau hmoov rau hauv cov pwm tshwj xeeb. Nws yog lub tshuab moulding tshiab tsim los ntawm kev sib txuas cov hmoov metallurgy nrog polymer txhaj tshuaj molding. Nws yog tshwj xeeb tshaj yog haum rau loj zus tau tej cov me me hlau cov khoom uas complex zoo thiab loj noj, tshwj xeeb tshaj yog precision hlau qhov chaw nrog complex qauv, me me ntim thiab tshwj xeeb yuav tsum tau. Nws yog ib qho nyuaj rau txheej txheem nrog cov txheej txheem ua ib txwm ua thiab cov nqi ua haujlwm siab. Hlau hmoov txhaj molding tuaj yeem txo cov nqi ua haujlwm.

Cov txheej txheem ntawm cov hmoov hlau txhaj tshuaj molding (MIM) cov khoom yog: hmoov ntxiv rau cov khoom sib xyaw granulation txhaj tshuaj molding degreasing (MIM degreasing rauv) sintering (MIM sintering rauv) tom qab ua cov khoom tsim. Nyob rau hauv cov txheej txheem ntawm kev tsim MIM cemented carbide qhov chaw, xaiv cov khoom tsis raug thiab kev tswj xyuas kev ua haujlwm ntawm txhua qhov txuas yuav ua rau muaj qhov tsis xws luag hauv cemented carbide qhov chaw. Yuav ua li cas kom tsis txhob muaj qhov tsis xws luag?

1. Kev xaiv hmoov. Ntxiv nrog rau kev ua kom tau raws li qhov yuav tsum tau ua ntawm particle loj tis thiab particle loj, hmoov metallurgy ntawm MIM cemented carbide kuj yuav tsum tau siab purity ntawm cov hmoov, thiab cov hmoov nrog impurities tsis tuaj yeem xaiv. Yog tias cov hmoov sib xyaw nrog sulfur, phosphorus, silicon thiab lwm yam khoom, cov tshuaj no yuav tsim cov pores thaum lub sij hawm sintering, ua rau cov khoom tsis xws luag.

2. Pub ntau lawm txuas. Cov cemented carbide hmoov xav tau ib txoj hlua khi kom haum thaum sib tov. Thaum sib tov, cov cemented carbide hmoov thiab cov binder yuav tsum tau tov tag nrho. Thaum sib tov, qhov kub thiab txias yuav tsum tau nruj me ntsis tswj kom tsis txhob muaj qhov tsis sib xws thiab kev faib tawm tsis sib xws ntawm cov ntawv khi, kom cov sib tov muaj cov khoom zoo rheological thiab viscosity tus nqi tom qab tau ua rau hauv cov khoom noj, thiab kom tsis txhob muaj qhov tsis xws luag hauv cov kev sib txuas tom ntej.

3. Cov txheej txheem ntawm kev tsim ntsuab billet. Qhov no tseem yog qhov txuas tseem ceeb hauv kev tsim cov cemented carbide qhov chaw. Txhawm rau kom tsis txhob muaj cov khoom tsis xws luag, kev saib xyuas yuav tsum tau them rau qhov tsim nyog ntawm kev tswj pwm kub, pub mis, txhaj tshuaj, tuav lub sijhawm, kev txhaj tshuaj ceev, thiab lwm yam thaum lub sijhawm txhaj tshuaj, uas tuaj yeem zam qhov tsis xws luag hauv kev txhaj tshuaj ntsuab. .

4. Degreasing txuas. Nyob rau hauv tus txheej txheem ntawm degreasing, yog hais tias lub degreasing rauv heats sai heev, nws yuav ua rau tawg nyob rau hauv cov cemented carbide qhov chaw. Cov txheej txheem ntawm qhov kub nce ib qib zuj zus tuaj yeem siv los degrease.

5. Sintering txuas. Vim lub siab ceev ntawm cemented carbide, nws cov khoom yog ib qho yooj yim rau deform vim nws lub ntiajteb txawj nqus thaum lub sij hawm ua kua theem sintering. Cov cuab yeej txhawb nqa tsim nyog tuaj yeem siv tau. Rau cov khoom loj, cov ntaub ntawv nrog qhov sib npaug shrinkage tuaj yeem xaiv los ua cov ntawv txhawb nqa. Tsis tas li ntawd, cov kua theem sintering lub sij hawm yuav tsum tau luv kom ntau li ntau tau.

Feem ntau qhov tsis xws ntawm cov hmoov hlau txhaj tshuaj molded qhov chaw yog raws li hauv qab no.

1. Kev txhaj tshuaj: Kev txhaj tshuaj yog hais txog cov khoom txhaj tshuaj tsis tiav los ntawm qhov tsis txaus ntawm lub tshuab txhaj tshuaj molding siv los yog cov dej tsis zoo ntawm cov ntaub ntawv txhaj tshuaj siv thiab lwm yam thaum cov ntaub ntawv tsis ua tiav tag nrho cov pwm kab noj hniav. Cov laj thawj rau kev txhaj tshuaj yog cov khoom siv tsis zoo, cov phab ntsa me me dhau ntawm cov khoom, pwm kub tsis dhau thiab lub sijhawm txhaj tshuaj luv luv. Kev ntsuas xws li kev txhim kho cov khoom fluidity lossis hloov cov ntaub ntawv, ua kom cov phab ntsa tuab, nce pwm kub, nce kev txhaj tshuaj thiab ncua sij hawm txhaj tshuaj tuaj yeem siv los daws qhov teeb meem.

2. Weld kab: Thaum lub sij hawm txhaj tshuaj, cov ntaub ntawv muab faib ua ob peb kwj hauv pwm kab noj hniav thiab ces converged. Tej zaum yuav muaj cov kab tawm ntawm qhov sib txuas, uas yog cov kab sib txuas thiab cuam tshuam rau cov tsos zoo thiab txawm tias lub zog ntawm cov khoom. Cov laj thawj ntawm kev tsim cov kab vuam yog vim qhov kev txhaj tshuaj siab dhau lawm, kev txhaj tshuaj nrawm dhau lawm, cov khoom siv kub thiab pwm kub tsawg dhau, thiab muaj ntau cov ntaub ntawv ntws. Kev ntsuas xws li nce qhov kev txhaj tshuaj siab, ua kom nrawm nrawm nrawm, nce cov khoom kub thiab pwm kub, thiab tsim nyog txo qhov kev sib cais tuaj yeem coj los daws qhov teeb meem.

3. Cua hnab ris. Thaum lub sij hawm txhaj tshuaj, huab cua hauv pwm kab noj hniav tsis tuaj yeem tawm hauv lub sijhawm. Nws yog qhwv los ntawm cov ntaub ntawv los yog compressed rau sab hauv phab ntsa ntawm pwm los ua cavitation, uas ua rau tsis muaj kev txhaj tshuaj rau ntawm qhov chaw ntawm cov khoom thiab cuam tshuam rau cov tsos zoo thiab txawm lub zog ntawm cov khoom. Thawj qhov ua rau cavitation yog cov pa tawm tsis zoo, qhov chaw tsis zoo ntawm lub qhov rooj, kev txhaj tshuaj nrawm dhau thiab kev hloov pauv loj ntawm cov khoom tuab. Kev ntsuas xws li ntxiv qhov qhov cua los yog qhov tob tob hauv qhov chaw, hloov lub rooj vag txoj hauj lwm, tsim nyog rau kev txhaj tshuaj nrawm, ncua lub sij hawm tuav lub zog thiab tsis txhob hloov cov khoom tuab tuab tuaj yeem coj los daws qhov teeb meem.

4. Deformation. Deformation yog hais txog kev khoov lossis sib tw ntawm cov khoom tsim tom qab txias, uas cuam tshuam ncaj qha rau cov tsos thiab qhov tseeb ntawm cov khoom, thiab tseem ua rau cov khoom tawg. Qhov ua rau deformation yog qhov tsis sib xws ntawm cov khoom, kub dhau thiab ntxov ntxov jacking ntawm cov khoom, nyias nyias thiab cov qauv tsis tsim nyog ntawm cov khoom, thiab kev ntxhov siab nyob hauv cov khoom. Kev ntsuas xws li kev ua kom txias ntawm cov pwm channel, txuas ntxiv lub sijhawm tuav lub sijhawm, jacking raws sijhawm ntawm cov khoom, txhim kho phab ntsa tuab thiab cov qauv tsim ntawm cov khoom, thiab kev txhim kho cov pwm pwm tuaj yeem siv los daws qhov teeb meem.

Hlau hmoov txhaj tshuaj molding (MIM) tuaj yeem tsim cov khoom siv cemented carbide nrog cov duab nyuaj. Nrog rau kev daws teeb meem ntawm kev tswj cov teeb meem thiab kev txhim kho ntawm MIM thev naus laus zis, cov ntawv thov ntawm cemented carbide maj mam nthuav dav, uas txhawb kev loj hlob ntawm tag nrho cov cemented carbide kev lag luam.