Qhov sib xyaw ntawm Cov Nres Nres Nkoj (cov khoom sib txhuam)
Muaj ntau hom kev sib txhuam cov ntaub ntawv. Cov ntaub ntawv sib txhuam rau tsheb nres tsheb thiabclutchesyog yuav luag tag nrho cov organic sib txhuam cov ntaub ntawv siv resin los yog roj hmab ua ib tug binder. Txog rau tam sim no, ze li ntawm 100 yam khoom siv ntuj tsim thiab hluavtaws uas tuaj yeem siv los tsim cov khoom sib txhuam organic tau pom. Ob peb lossis ib lub kaum os cov ntaub ntawv raug xaiv thiab sib xyaw hauv ib qho piv txwv los tsim cov khoom sib txhuam uas muaj cov yam ntxwv sib txawv. Kev xaiv thiab kev sib xyaw ntawm cov khoom siv raw yog hu ua formula. Formulation yog qhov tseem ceeb tshaj plaws hauv kev tsim cov khoom sib txhuam.
Cov mis yog varied thiab varied, tab sis nws yeej tsis hloov. Txhawm rau ua kom tiav, txhua tus qauv siv tau yog tsim los ntawm plaub yam hauv qab no ntawm cov ntaub ntawv yooj yim:
Adhesive: Kwv yees li 5 feem pua ~ 25 feem pua Reinforcer: Txog 20 feem pua ~ 50 feem pua Kev txhuam kev txhuam: li 30 feem pua ~ 60 feem pua Cov txheej txheem txias: li 0.5 feem pua ~ 1 feem pua
(1) Adhesives: xws li thermosetting resins thiab roj hmab. Lub luag hauj lwm ntawm lub binder yog sib txuas cov khoom ntawm cov formulation ua ke los tsim ib qho khoom ntawm lub zog txaus, zoo hardness, thiab siab kub thiab abrasion tsis kam raws li qhov ua tau. Qhov kub tsis kam ntawm cov nplaum yog qhov tseem ceeb cuam tshuam rau kev ua haujlwm ntawm cov khoom sib txhuam. Yog li ntawd, nws hom thiab tus nqi yog qhov kev txiav txim siab tseem ceeb hauv kev tsim qauv.
(2) Txhim kho cov fibers: xws li asbestos fibers, natural mineral fibers, man-made mineral fibers, organic fibers, plant fibers, plain fibers, carbon fibers. Cov fibers reinforcing yuav tsum muaj peev xwm muab lub zog txaus, muaj qhov kub zoo thiab hnav tsis kam, thiab yuav tsum tsis txhob khawb qhov dual.
(3) Friction performance modifiers: Muaj ntau ntau hom kev sib txhuam kev ua tau zoo, thiab lawv siv sib txawv. Nws yog ib qho tsim nyog yuav tsum ua kom muaj kev sib txawv ntawm cov khoom siv cob thiab fiber ntau, thiab tsim kom muaj cov txheej txheem tsim kom tau raws li kev siv sib txawv.
a\ tuaj yeem ua kom cov coefficient ntawm kev sib txhuam: cov khoom siv tsis yog hlau thiab lawv cov khoom siv feem ntau. Piv txwv li: barite (barium sulfate), wollastonite, alumina, alumina (corundum), hlau oxide liab (dub), coke hmoov, thiab lwm yam. Lub luag haujlwm tseem ceeb ntawm cov khoom siv raw yog ua kom covnres tshebmuaj kev sib txhuam coefficient txaus, uas tuaj yeem tsim kom muaj zog txaus braking tsis tsuas yog nyob rau hauv qhov kub thiab txias ntawm li 100 ° C, tab sis kuj nyob rau hauv qhov kub ntawm 400 txog 500 ° C.
b\ Kev sib txhuam coefficient ruaj khov: Cov khoom siv tseem ceeb yog graphite, molybdenum disulfide, mica, talc, hlau mos thiab lwm yam. Cov ntaub ntawv no muaj tsawg hardness thiab muab lubrication ntawm kev sib txhuam nto, uas stabilizes kev sib txhuam coefficient thiab yog siv los tiv thaiv kev sib txhuam khub.
c\ Organic kev sib txhuam kev ua tau zoo hloov kho: Feem ntau siv cov khoom siv roj hmab, cov roj hmab hmoov, thiab lwm yam. Cov khoom siv ntxiv no yuav pab txo qhov tawv thiab qhov ntom ntawm cov khoom, ua kom cov coefficient ntawm kev sib txhuam, thiab txo qhov hnav, tab sis kev siv ntau dhau tuaj yeem ua rau thermal lwj. .
d\ Hlau hmoov (chip): Nyob rau hauv ib co hnyav-lub luag hauj lwm nres pad formulations, kuj muaj ib co ntawm cov hlau hmoov los yog chips ntxiv. Feem ntau siv yog hlau hmoov, tooj liab hmoov (chip), txhuas hmoov thiab lwm yam. Cov hlau tivthaiv yog ntxiv feem ntau los txhim kho qhov kub thiab txias kev sib txhuam thiab hnav cov khoom ntawm cov khoom.
(4) Cov txheej txheem hloov pauv: xws li pwm tso cov neeg ua haujlwm (stearic acid thiab lwm yam ntsev, oleic acid, thiab lwm yam) thiab tshwj xeeb additives (coupling agents, nplaim retardants, thiab lwm yam). Lub luag haujlwm ntawm cov ntaub ntawv no yog txhawm rau txhim kho cov txheej txheem ntawm cov khoom thiab ua kom cov txiaj ntsig ntawm cov khoom.
Cov plaub hom raw khoom saum toj no tsis ua ib lub luag haujlwm hauv kev tsim. Lub subtlety ntawm cov qauv zoo heev yog tias lub peev xwm ntawm ntau yam khoom sib cuam tshuam yog txoj cai, kom nws ua tau raws li cov kev cai dav dav ntawm lub zog, hardness, thermal expansion, processing technology, nqi, thiab lwm yam, thaum xyuas kom meej tias cov khoom sib txhuam yog tsim nyob rau hauv. qhov ntsuas kub ua haujlwm. Kev sib txhuam ruaj khov kev ua tau zoo thiab hnav lub neej ntev.
