Cov kua theem Sintering li cas?
Ntau cov sintering system tsim cov theem ua kua thaum lub sijhawm Sinteringing. Feem ntau, cov khoom ntxiv lossis cov sib txuas ua ke tsis hnov qab nrog lossis yaj hauv matrix, thiab tej zaum tseem yuav ua kua thaum sintering. Lawv tsis ntub cov khoom loj, xws li coj ua tooj dag lossis mns hauv cov hlau stainless. Cov theem ua kua no tsis txhawb nqa lossis cuam tshuam rau cov txheej txheem Sintering; Hloov chaw, nws muaj nyob rau hauv matrix raws li cov tee dej, thiab tag nrho cov kab ke yog sterpined los ntawm cov khoom {}} lub xeev diffusion.
Tsis tas li ntawd, thaum cov theem ua kua nrog txwv tsis pub ua rau lub sijhawm ua kua dej ntawm cov kua dej ua kua yog ntau dua li cov theem khoom. Yog li ntawd, tswj cov theem ua kua cov ntsiab lus tau txais txiaj ntsig rau cov txheej txheem Sintering, raws li cov nrawm dua hloov pauv ntawm cov ntu. Cov theem ua kua muaj peev xwm muaj nyob hauv ob daim ntawv: ib qho yog thaum cov theem ua kua nyob thoob plaws hauv tag nrho cov sintering tuav, hu ua ib theem txuas ntxiv; Lwm tus yog thaum cov theem ua kua solorifies thaum lub sijhawm Sintering, hu ua theem hloov pauv.
Nruam kua theem Sintering tau muab faib ua ob hom: Thawj hom cuam tshuam nrog cua sov cov hmoov nplej ua kom sib xyaw ua kua. Ib qho piv txwv yog cov alloys hnyav, xws li w- ni al ... 3}} ni, uas w muaj kev txwv solubility; lossis Wc {- co alloys, uas wc}} {{{10} {{10} {{10} {{10} {{{10} {{10} {{ Ni {{{13 {}} fe - w alloy matrix. Thaum sintering, fe - ni melts rau theem ua kua thiab yaj tawm, ua rau kev sib tw ntawm lub tungsten hais. Tshaj dhau tungsten ntau tshaj nws solubility nyob rau hauv cov kua, ib tus kheej ntawm kev sib cais-ua kua thaum lub sijhawm sintering.
(Muaj ntawm cov tungsten nplej hauv Ni -}}}}} recrecipitation thaum theem sintering.)
Qhov thib ob hom yog suptersolid - Kab Kua Ua Kua Theem Sintering (SLPS). Thaum pre {-} Alloy alloy alloy alloed hmoov nyob rau saum npoo thiab sab hauv cov kua yaj, uas ua rau supersolid- Kab Kua Ua Kua Theem Sintering. Lub tiam ntawm cov dej no ua kom yooj yim ua kom tiav kev ua kom sai. Ib qho piv txwv ntawm kev siv SLPS yog M2 hom cuab yeej hlau. Daim duab 7.10 qhia tias ib qho supintructed microstructure ntawm M2 hom cuab yeej hlau. Daim duab qhia cov roj carbide me me hauv cov pob zeb thiab ntau qhov ntau ntawm cov roj carbide nyob nrog qee cov qoob loo.
(Muaj ib qho me me ntawm carbide theem sab hauv cov nplej thiab ntau npaum li cas ntawm cov theem carbide ntawm qee cov qoob loo cov ciaj ciam.)
Muaj ob hom kev hloov pauv ua kua theem Sintering: uas tshwm sim thaum lub caij A thiab Breating B form ib qho, tso cua sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov thiab ua kom sov siab Nial yog xws li piv txwv. Qhov thib ob yog thaum cov kua roj av theem ploj vim yog qhov sib txawv ntawm ib qho kev daws teeb meem los ua cov tshuaj khov kho. Piv txwv li, carbon ua ntaub ntawv eutectic nrog hlau thiab chromium. Thaum cov pa roj carbon diffuses mus rau hauv matrix, nws ua cov tshuaj khov kho, thiab theem kua theem ua tau.