Hmoov metallurgy sintering yog cov txheej txheem kev kho cua sov tshwj xeeb uas txhim kho lub zog thiab cov yam ntxwv ntawm kev cog lus los yog xoob hmoov. Nws plays lub luag haujlwm tseem ceeb hauv cov txheej txheem hmoov metallurgy. Los ntawm sintering, cov hmoov hmoov tau dhau los ntawm ntau lub cev thiab tshuaj phenomena, xws li kev sib nrig sib ntws, diffusion, melting, thiab recrystallization. Cov txheej txheem no ua rau muaj qhov ntom ntom ntawm cov hmoov lub cev thiab tshem tawm cov pores uas twb muaj lawm. Nov yog qee qhov kev ua haujlwm sintering feem ntau:
▅Solid-state sintering: Txoj kev no suav nrog kev muab cov hmoov lub cev rau qhov kub thiab txias hauv qab lub melting point ntawm nws tus kheej cov khoom, feem ntau nyob ib ncig ntawm 0.7 mus rau 0.8 npaug ntawm qhov tseeb melting point (Tm) ntsuas hauv Kelvin.
▅ Kua-lub xeev sintering: Thaum cov hmoov compact muaj ntau yam, sintering tuaj yeem tshwm sim saum lub melting point ntawm ib qho kev sib xyaw, uas ua rau tsim ib qho me me ntawm cov kua theem nyob rau hauv lub compact thaum lub sij hawm sintering txheej txheem.
▅Pressure sintering: Nyob rau hauv txoj kev no, lub siab yog siv rau cov hmoov lub cev thaum sintering los pab densification. Lub siab sintering yog qee zaum hu ua kub nias, uas sib txuas cov hmoov sib sau thiab sintering ncaj qha kom tau txais cov khoom tiav.
▅ Kev ua kom sintering: Qee yam kev siv lub cev lossis tshuaj lom neeg tau ua haujlwm thaum lub sijhawm sintering kom txo tau qhov kub thiab lub sijhawm, uas ua rau muaj kev ua tau zoo ntawm lub cev sintered.
▅ EDM sintering: Thaum lub sij hawm tsim thiab nias theem, cov hluav taws xob ncaj qha tam sim no thiab cov hluav taws xob hluav taws xob tau siv rau lub cev hmoov, tsim cov arcs ntawm cov hmoov hmoov rau sintering. Lub siab yog maj mam siv thaum lub sij hawm sintering, combining cov txheej txheem thiab sintering.
▅Infiltration sintering: Txoj kev no suav nrog kev sib cuag cov ntxeem tau nrog cov kua hlau lossis hlau uas muaj peev xwm ntub nws cov khoom ntawm qhov kub thiab txias. Capillary rog pab txhawb kev sau cov pores hauv qhov khoob nrog cov kua hlau. Infiltration sintering yog tsim rau kev tsim ntau yam ntaub ntawv alloy los yog cov khoom xws li tungsten nyiaj, tungsten tooj liab, thiab hlau tooj liab, aiming los txhim kho lawv lub zog thiab lwm yam khoom.
