Koj paub ntau npaum li cas txog cov khoom siv semi-metallic nres?
Semi-metallic brake pads yog ib hom tshiab ntawm cov khoom sib txhuam tsim los ntawm cov khoom siv sib txhuam organic thiab cov khoom siv tshuaj txhuam cov hmoov metallurgy. Nws siv cov hlau fibers tsis yog asbestos fibers. Nws yog cov khoom siv tsis yog asbestos kev sib txhuam tsim los ntawm Bendis Company ntawm Tebchaws Meskas thaum xyoo 1970s.
"Semi-hlau" hybrid nres ncoo (Semi-met) feem ntau yog siv cov ntaub plaub hlau ntxhib los ua cov fiber ntau thiab cov khoom tseem ceeb. Asbestos thiab non-asbestos organic brake pads (NAO) tuaj yeem yooj yim sib txawv ntawm cov tsos (zoo fibers thiab hais), thiab lawv kuj muaj qee yam khoom sib nqus.
Semi-metallic sib txhuam cov ntaub ntawv muaj cov yam ntxwv tseem ceeb hauv qab no:
(l) ruaj khov heev hauv qab coefficient ntawm kev sib txhuam. Tsis muaj cua sov lwj tshwm sim. Zoo thermal stability;
(2) Zoo hnav tsis kam. Lub neej ua haujlwm yog 3-5 npaug ntawm cov ntaub ntawv sib txhuam asbestos;
(3) Nws muaj kev sib txhuam zoo thiab kev sib txhuam coefficient ruaj khov nyob rau hauv qhov hnyav hnyav;
(4) Zoo thermal conductivity. Qhov kub gradient me me. Tshwj xeeb tshaj yog tsim rau disc nres nrog me me;
(5) Braking nrov yog me me.
Tebchaws Asmeskas, Tebchaws Europe, Nyiv thiab lwm lub tebchaws tau pib txhawb thiab siv nws ntawm qhov loj hauv xyoo 1960s. Qhov hnav tsis kam ntawm cov ntawv semi-hlau yog ntau dua 25 feem pua siab dua li ntawm daim ntawv asbestos. Tam sim no, nws tuav txoj haujlwm tseem ceeb hauv kev lag luam nres tsheb hauv kuv lub tebchaws. Thiab feem ntau cov tsheb hauv Tebchaws Meskas. Tshwj xeeb yog tsheb thiab vans. Semi-metallic brake linings twb account rau ntau tshaj 80 feem pua.
Txawm li cas los xij, cov khoom lag luam tseem muaj qhov tsis zoo hauv qab no: ①Steel fiber ntau yooj yim rau xeb, thiab nws yooj yim rau lo los yog ua rau cov khub tom qab xeb, thiab lub zog ntawm cov khoom txo qis tom qab xeb, thiab hnav yog nce; ② Lub thermal conductivity yog siab, thiab nws yog ib qho yooj yim ua rau huab cua tsis kam nyob rau hauv lub braking system ntawm high kub Cov kev sib txhuam disc txheej yog sib cais los ntawm cov hlau phaj: ③ Lub hardness yog siab, uas yuav ua rau lub dual cov ntaub ntawv uas yuav ua rau chatter thiab tsawg- zaus braking nrov; ④ Qhov ceev yog siab.
Txawm hais tias semi-metallic brake pads muaj ntau qhov tsis zoo, lawv tseem yog cov khoom siv rau cov tsheb nres tsheb vim lawv cov khoom ruaj khov thiab cov nqi qis.
