Hauv kev tshawb fawb thiab kev tsim kho thiab tsim cov hmoov hlau metallurgy, kev xaiv thiab kev tswj cov khoom siv raw feem ntau txiav txim siab qhov kev ruaj ntseg zoo thiab kev ua tau zoo ntawm cov khoom tiav. Xyoo ntawm kev lag luam xyaum tau pom tias kev paub thiab siv cov ntaub ntawv raw cov ntaub ntawv kev tshawb fawb tsis tuaj yeem txhim kho kev tsim khoom tab sis tseem ua kom cov khoom sib xws thiab kev ntseeg siab ntawm cov khoom ua tau zoo raws li kev ua haujlwm nyuaj.
Firstly, raw khoom characterization thiab batch tswj yog cov tseem ceeb ntawm qhov kev paub no. Cov khoom sib txawv ntawm cov hmoov hlau ua rau pom qhov sib txawv me me hauv qhov loj me me, morphology, thiab cov ntsiab lus oxygen, uas cuam tshuam ncaj qha rau nias ceev thiab sintering shrinkage. Hauv kev xyaum, tsim kom muaj kev tshuaj ntsuam xyuas tag nrho, suav nrog laser particle loj tsom xam, scanning electron microscopy morphology kev soj ntsuam, thiab tshuaj muaj pes tsawg leeg pov thawj, tuaj yeem txheeb xyuas qhov pheej hmoo ua ntej thiab zam cov khoom tsis xws luag los ntawm cov khoom siv raw khoom hloov pauv. Ib txhij, ntev - mus txog qhovtwg thiab sib piv cov ntaub ntawv raw los ntawm cov neeg muag khoom sib txawv pab xaiv pawg nrog ntau dua kev sib raug zoo nrog nws tus kheej cov txheej txheem, tsim kom muaj cov khoom lag luam ruaj khov.
Qhov thib ob, hmoov pretreatment kev paub cuam tshuam rau kev ua tau zoo ntawm cov txheej txheem tom ntej. Rau cov hmoov uas muaj agglomeration los yog muaj adsorbed gases, tsim kom qhuav, txo, los yog sieving kev kho mob yuav pab tau zoo flowability thiab bulk ntom, txhim khu kev sib xws ntawm nias thiab molding. Kev paub dhau los qhia tau hais tias ntxiv cov lej ntawm cov roj nplua nyeem lossis cov hloov kho saum npoo rau cov txheej txheem alloy tshwj xeeb tuaj yeem txo cov pwm coj thiab ua kom zoo zog ntsuab, uas yog qhov tseem ceeb tshwj xeeb hauv kev tsim cov khoom loj ntawm siab - qhov tseeb.
Qhov thib ob, nyob rau hauv cov hmoov sib tov thiab proportioning txheej txheem, kev paub qhia txog lub hauv paus ntsiab lus ntawm "khoom siv- tshwj xeeb formulation." Cov hmoov sib txawv ntawm cov khoom sib txawv sib txawv hauv qhov ntom ntom, hardness, thiab kev ua haujlwm sintering, thiab kev sib xyaw yooj yim homogeneous feem ntau tsis ua tiav qhov zoo sib xws. Siv kev sib xyaw ua ke los yog ua ntej- cov tswv yim sib xyaw tuaj yeem txhim kho qhov tseeb ntawm cov khoom faib tawm, yog li txhim kho cov khoom siv kho tshuab thiab qhov tseeb qhov tseeb ntawm cov khoom kawg. Rau ntau- cov tshuab ua ke, nws tseem yuav tsum tau ua tib zoo saib xyuas qhov kev coj tus cwj pwm interdiffusion ntawm txhua yam khoom thaum lub sij hawm sintering kom tsis txhob muaj kev sib cais hauv zos los yog nag lossis daus ntau dhau ntawm cov theem nkig.
Thaum kawg, kev rov ua dua tshiab yog qhov tseem ceeb sib npaug. Unsintered hmoov, tom qab kom zoo sieving thiab impurity tshem tawm, tuaj yeem rov qab siv dua hauv kev tsim khoom thaum ua kom zoo. Qhov no tsis yog tsuas yog txo cov nqi raw khoom tab sis kuj ua raws li cov qauv kev tsim khoom ntsuab. Txawm li cas los xij, ib qho kev txwv sab saud rau cov khoom siv rov ua dua tshiab yuav tsum tau teeb tsa raws li hom hmoov thiab qib ntawm cov kab mob sib kis kom tsis txhob cuam tshuam rau kev ua haujlwm ntawm cov khoom tiav.
Hauv cov ntsiab lus, kev ua tau zoo hauv cov hmoov metallurgy raw cov ntaub ntawv nthuav tawm tag nrho cov saw hlau, los ntawm kev xaiv cov khoom siv thiab pretreatment rau proportioning thiab recycling, ua tus choj tseem ceeb ntawm kev tsim theoretical thiab kev ua lag luam. Nruam accumulating thiab summarizing qhov kev paub no yuav muab kev txhawb zog rau kev lag luam los txhim kho zoo stability thiab kev sib tw.