Semi-metallic sib txhuam cov khoom
Semi-metallic friction khoom yog ib yam tshiab ntawm tsheb nres cov khoom tsim nyob rau hauv 1970s. Nws yog hu ua semi-metallic kev sib txhuam cov khoom tseem ceeb vim tias nws cov mis feem ntau muaj li ntawm 20% mus rau 45% ntawm cov hlau hlau (xws li steel fiber, txo cov hmoov hlau, lossis hlau oxide hmoov, thiab lwm yam), los ntawm kev ntxiv cov khoom ntawm cov khoom no. tau zoo thermal stability, zoo thermal conductivity, kom kov yeej cov asbestos kev sib txhuam cov khoom thaum ntxov kub thermal poob, kev sib txhuam nto yooj yim rau tawg thiab lwm yam shortcomings.
Tam sim no, feem ntau siv hauv Suav teb tseem yog cov khoom siv sib txhuam semi-hlau, thiab qee lub tuam txhab tseem tsim cov ntaub ntawv sib txhuam asbestos, tab sis raws li tau hais los saum no, cov khoom no tsis zoo tag nrho hauv cov txheej txheem siv, tab sis kuj muaj nws qhov tsis xws luag. , qhov teeb meem tseem ceeb yog cov hlau fibers yooj yim rau xeb, xeb yog ib qho yooj yim los lo rau lub dual thiab muaj kev puas tsuaj ntau dua rau nws. Nws txo lub zog ntawm cov khoom sib txhuam thiab ua kom lub zog hnyav, thaum lub zog ntawm cov hlau fiber ntau yog siab, thiab qhov sib txawv hardness ntawm cov hlau fiber ntau thiab dual yog qhov loj heev, uas yooj yim rau kev puas tsuaj rau dual thiab nrawm dual hnav. . Rau qhov xwm txheej no, cov teb chaws txawv teb chaws tau siv txoj hauv kev ntxiv zinc lossis zinc compounds los ua kom muaj kev tiv thaiv xeb.
