Taw qhia rau Powder Metallurgy Friction Materials (saum toj no)
Cov khoom siv hlau thiab tsis yog xim hlau sib xyaw nrog cov coefficient ntawm kev sib txhuam thiab kev hnav siab ua los ntawm cov hmoov metallurgy. Feem ntau yog siv rau hauv kev tsim khoom ntawm ntau yam nres thiab kis tau tus mob. Xyoo 1930, Tebchaws Asmeskas Wellman (SK Wellman) tau tsim kev siv roj (ntub) tooj liab-raws li hmoov metallurgy kev sib txhuam cov ntaub ntawv, thiab siv rau kev tsim khoom.
Xyoo 1950, hlau hmoov metallurgical txhuam cov ntaub ntawv rau kev sib txhuam qhuav tshwm sim. Piv nrog rau kev siv cov khoom siv hlau sib txhuam, cov khoom siv no tuaj yeem tiv taus qhov kub ntawm qhov sib txhuam ntawm 500 txog 600 degree nce mus rau ntau tshaj 1000 degree. Tuam Tshoj cov hmoov metallurgy kev sib txhuam cov ntaub ntawv tshawb fawb tau pib thaum xyoo 1960, tau tsim ntau tshaj 10 hom tooj liab thiab hlau-raws li hmoov metallurgy kev sib txhuam cov khoom. Piv nrog cov ntaub ntawv tsis yog hmoov metallurgy kev sib txhuam (xws li cam khwb cia hlau thiab cam khwb cia hlau, resin-bonded asbestos thiab resin-bonded "hlau - non-metallic" hmoov sib tov, thiab lwm yam), hmoov metallurgy kev sib txhuam cov ntaub ntawv muaj qhov zoo hauv qab no: tuaj yeem ua tau sai. nqus kinetic zog, braking, kis ceev, hnav thiab tsim kua muag; muaj zog, siab kub thiab siab siab, zoo thermal conductivity, thiab txawm tias cov hmoov metallurgy kev sib txhuam cov ntaub ntawv tsis yog hmoov metallurgy kev sib txhuam cov ntaub ntawv, lawv muaj peev xwm nqus kinetic zog, nres, tsav ceev, thiab hnav me ntsis; siab zog, siab kub thiab siab siab, thiab zoo thermal conductivity. Lub zog muaj zog, siab kub thiab siab siab, zoo thermal conductivity, txawm nyob rau ntawm qhov kub thiab txias siab tuaj yeem tswj tau qhov coefficient ruaj khov ntawm kev sib txhuam; tsis yooj yim rau tom nrog cov khoom sib txhuam, corrosion kuj, coefficient ntawm kev sib txhuam los ntawm cov roj, noo noo, qhov cuam tshuam me me; tsis tshua muaj suab nrov, lub neej ua haujlwm ntev thiab lwm yam.
