Tus neeg sawv cev ntawm kev sib tsoo lub log

Tus neeg sawv cev khi ua lub luag haujlwm tseem ceeb hauv kev ruaj ntseg ntawm cov khoom sib tsoo, yog li ua kom ntseeg tau tias cov pob zeb sib tsoo muaj cov khoom siv tseem ceeb xws li lub zog, tawv, hnav tsis kam, thiab kub tsis kam. Nws kuj muab qhov tsim nyog tuav quab yuam rau abrasive thaum lub sij hawm sib tsoo. Muaj peb hom kev sib tsoo pob zeb sib tsoo: ceramic-based, hlau-based, thiab resin-based. Ceramic bonds tau sau tseg rau lawv cov khoom siv tshuaj lom neeg ruaj khov thiab tshwj xeeb kub ua haujlwm. Txawm li cas los xij, lawv cov brittleness thiab tsis zoo thermal conductivity ua rau lawv tsis tsim nyog rau cov kev mob hnyav ntawm kev sib tsoo tsheb ciav hlau, uas muaj kev kub ceev, hnyav loads, siab kub, thiab khaus vibrations. Tam sim no, tsis muaj cov ntaub ntawv tshaj tawm ntawm cov ntawv cog lus ceramic sib tsoo pob zeb siv hauv kev tsheb ciav hlau sib tsoo.

Cov khoom siv hlau sib txuas tuaj yeem ua kom muaj zog, siab thermal conductivity, thiab hnav tsis kam rau cov pob zeb sib tsoo. Jiang et al. npaj tooj liab-raws li [1] thiab hlau-raws li [2] hlau-bonded sib tsoo pob zeb siv hmoov metallurgy. Kev sib tsoo cov kev sim tau pom tias qhov sib tsoo ntawm cov hlau sib tsoo pob zeb yog kwv yees li 15 npaug siab dua li ntawm cov pob zeb sib tsoo pob zeb, nce mus txog 686. Txawm li cas los xij, lub zog siab ntawm cov hlau sib tsoo ua rau nws nyuaj rau daim ntawv cog lus hnav thaum lub sij hawm sib tsoo, yog li nthuav tawm cov abrasive thiab ua rau nws tus kheej tsis zoo ntawm cov pob zeb sib tsoo. Tsis tas li ntawd, txij li kev tsheb ciav hlau sib tsoo tsheb tsis muaj cov xwm txheej rau kev sib tsoo pob zeb ntse, cov hlau sib tsoo pob zeb tsis muaj qhov zoo dua hauv kev sib tsoo cov haujlwm. Tsis tas li ntawd, sintering kub ntawm cov hlau sib tsoo pob zeb yog siab, cov txheej txheem yog complex, cov nqi tsim khoom yog siab, thiab kev lag luam ntawm cov pob zeb sib tsoo tsis zoo. Tam sim no, tsis muaj ib qho piv txwv ntawm cov hlau sib tsoo pob zeb siv hauv kab sib tsoo. Nyob rau hauv lub neej yav tom ntej, kev tshawb fawb yuav tsom mus rau kev ntsuas lub zog thiab nws tus kheej-sharpening ntawm hlau-raws li kev sib tsoo pob zeb, nrhiav cov khoom siv qis qis, thiab ua kom cov txheej txheem tsim khoom. Resin binders, uas muaj lub zog siab, toughness, thiab cov khoom siv qis qis, nrog rau cov txheej txheem molding yooj yim, yog siv dav hauv kev tsim khoom. Tam sim no, cov pob zeb sib tsoo (kev sib tsoo thiab kev sib tsoo high-speed passive) tau nruab rau ntawm cov tsheb sib tsoo tsheb rau cov tsheb ciav hlau thauj mus los hauv tebchaws thiab thoob ntiaj teb yog tag nrho cov pob zeb sib tsoo pob zeb [3,4]. Rail sib tsoo tej yam kev mob hnyav, thiab sib tsoo kub yog siab nyob rau hauv lub qhuav sib tsoo lub xeev. Yog li ntawd, cov pob zeb sib tsoo feem ntau siv cov phenolic resins nrog kub tsis kam, zoo adhesion, thiab yooj yim molding, nrog rau cov tshiab hloov ntau yam xws li epoxy, polyvinyl chloride, polyamide, polyvinyl ether, bismaleimide, thiab lwm yam hloov phenolic resins [5]. Polyphenol ether resins thiab polyimide resins nrog cov cua sov siab dua thiab cov khoom siv kho tshuab kuj tseem siv tau [6]. Zhang et al. [4] tau kawm txog cov khoom sib tsoo ntawm plaub phenolic resin sib tsoo pob zeb thiab pom tias ua kom lub zog, toughness, thiab kub tsis kam ntawm cov resin ntawm qhov kub thiab txias yog qhov tseem ceeb rau kev npaj cov pob zeb ua haujlwm siab. Cov txiaj ntsig ntawm Zhang et al. [7] pom tias muaj zog tsawg (cov ntsiab lus tsis tshua muaj binder) sib tsoo pob zeb muaj qhov zoo ntawm nws tus kheej thiab tshem tawm cov khoom loj tab sis nws muaj qhov kub hnyiab ntawm txoj kev tsheb ciav hlau thiab muaj kev hnav tsis zoo. Hloov pauv, lub zog siab (cov ntsiab lus siab binder) sib tsoo pob zeb pom zoo hnav tsis kam thiab kev sib tsoo siab tab sis tsis zoo rau nws tus kheej. Zhang et al. [8] pom tias qhov debonding ntawm abrasive / binder interface yog thawj qhov laj thawj rau qhov ntxov ntxov ntawm cov xim av fused alumina sib tsoo pob zeb abrasive, ua rau muaj qhov sib tsoo tsawg thiab sib tsoo. Cov kev tshawb pom no qhia tau hais tias lub zog, toughness, kub tsis kam, thiab wettability ntawm cov resin nyob rau saum npoo ntawm cov ntaub ntawv heterogeneous (abrasives, fillers, thiab lwm yam) ncaj qha cuam tshuam rau cov khoom ntawm cov pob zeb sib tsoo. Yog li ntawd, nws yog ib qho tseem ceeb ntawm kev tshawb fawb los xaiv cov resins nrog lub zog siab, toughness, thermal decay resistance, thiab muaj zog wettability, thiab kom paub meej cov kev sib raug zoo mechanism ntawm resin / abrasive, resin / muab tub lim, thiab lwm yam heterogeneous interfaces nyob rau hauv lub sib tsoo pob zeb system.

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[2]SUN Daming, JIANG Xiaosong, SUN Hongliang, et al. Microstructure thiab Mechanical Properties ntawm Fe-ZTA Cermet Npaj los ntawm Nqus Kub-nias Sintering [J]. Cov ntaub ntawv tshawb fawb nthuav qhia, 2020, 7(2): 26518.

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[8] Zhang Wulin, LIU Changbao, YUAN Yongjie, et al. Kev soj ntsuam qhov cuam tshuam ntawm Abrasive Hnav ntawm Kev Sib Tsoo Kev Ua Haujlwm ntawm Rail Sib Tsoo Pob Zeb [J]. Phau ntawv Journal of Manufacturing Processes, 2021, 64: 493-507.