Cov txheej txheem ntawm cov hmoov hlau txhaj tshuaj molding (MIM) cov khoom

Cov txheej txheem ntawm cov hmoov hlau txhaj tshuaj molding (MIM) cov khoom

Hmoov ntxiv binder → sib tov → granulation → txhaj tshuaj molding → degreasing (MIM degreasing rauv) → sintering (MIM sintering rauv) → tom qab kho → tsim khoom. Nyob rau hauv tus txheej txheem ntawm kev tsim MIM hard alloy qhov chaw, xaiv cov khoom siv tsis raug thiab kev tswj xyuas kev ua haujlwm ntawm txhua theem yuav ua rau muaj qhov tsis xws luag hauv qhov nyuaj alloy. Yog li yuav ua li cas kom tsis txhob muaj qhov tsis xws luag?

1. txheej txheem xaiv hmoov. Ntxiv rau qhov ua tau raws li qhov yuav tsum tau ua xws li particle loj faib thiab particle loj, MIM cemented carbide hmoov metallurgy kuj yuav tsum muaj siab purity ntawm cov hmoov, uas tsis tuaj yeem tov nrog impurities. Yog tias cov hmoov sib xyaw nrog sulfur, phosphorus, silicon thiab lwm yam khoom, cov tshuaj no yuav tsim cov pores hauv cov txheej txheem sintering, ua rau cov khoom tsis xws luag.

2. Cov txheej txheem ntau lawm ntawm kev pub mis. Thaum sib tov nyuaj alloy hmoov, tsim nyog binders yuav tsum tau. Thaum sib tov, cov hmoov hlau tawv tawv yuav tsum tau muab sib xyaw nrog cov ntawv khi. Cov txheej txheem sib tov yuav tsum nruj me ntsis tswj qhov kub thiab txias kom tsis txhob muaj qhov tsis sib xws thiab kev faib tawm tsis sib xws, kom cov sib tov muaj cov khoom zoo rheological thiab viscosity muaj nuj nqis tom qab noj, thiab kom tsis txhob muaj qhov tsis xws luag yav tom ntej.

3. Cov txheej txheem ntawm kev tsim ntsuab billets. Qhov no kuj yog qhov txuas tseem ceeb hauv kev tsim cov khoom siv tawv tawv. Txhawm rau kom tsis txhob muaj cov khoom tsis xws luag, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo saib xyuas qhov tsim nyog ntawm pwm qhov kub thiab txias, pub mis, txhaj tshuaj, tuav siab, tuav lub sijhawm, txhaj tshuaj ceev, thiab lwm yam thaum lub sijhawm txhaj tshuaj, uas tuaj yeem zam qhov tshwm sim ntawm qhov tsis xws luag. txhaj tshuaj ntsuab.

4. Degreasing txheej txheem. Thaum lub sij hawm degreasing txheej txheem ntawm hard alloy billets, yog hais tias tus kub nce tus nqi ntawm lub degreasing rauv yog ceev heev, nws yuav ua rau tawg thiab tsis xws luag nyob rau hauv hard alloy qhov chaw. Txoj kev maj mam nce kub tuaj yeem siv rau degreasing.

5. Sintering txheej txheem. Qhov ceev ntawm cov alloys nyuaj yog siab, thiab thaum lub sij hawm ua kua theem sintering, cov khoom yog nquag deformation vim lawv lub ntiajteb txawj nqus. Cov cuab yeej txhawb nqa tsim nyog tuaj yeem siv tau, thiab cov khoom siv nrog cov nqi shrinkage zoo sib xws tuaj yeem raug xaiv los ua cov ntawv txhawb nqa rau cov khoom loj. Tsis tas li ntawd, lub sijhawm ua kua theem sintering yuav tsum tau txo kom tsawg li ntau tau.