Kev Ntsuas Rockwell Hardness ntawm PEEK Polymer Composites

PEEK (polyetheretherketone) yog cov khoom siv sib xyaw ua ke zoo uas ua los ntawm kev sib xyaw PEEK resin nrog cov khoom siv txhawb nqa xws li carbon fiber, iav fiber, thiab ceramics. Cov ntaub ntawv PEEK uas muaj qhov nyuaj dua muaj kev tiv thaiv zoo dua rau kev khawb thiab kev sib txhuam, ua rau lawv tsim nyog rau kev tsim cov khoom siv uas tsis yooj yim hnav thiab cov khoom siv uas xav tau kev txhawb nqa muaj zog. Qhov nyuaj siab ntawm PEEK ua rau nws khaws nws cov duab tsis hloov pauv txawm tias tom qab tiv taus kev ntxhov siab thiab kev siv ntev, uas tso cai rau nws siv dav hauv cov teb xws li aerospace, automotive, thiab kev kho mob.

Rau cov ntaub ntawv PEEK, qhov nyuaj yog qhov qhia tseem ceeb ntawm cov khoom siv lub peev xwm los tiv taus kev hloov pauv hauv qab lub zog sab nraud. Nws qhov nyuaj muaj qhov cuam tshuam loj rau lawv cov kev ua tau zoo thiab kev siv. Qhov nyuaj feem ntau ntsuas los ntawm Rockwell hardness, tshwj xeeb tshaj yog HRR nplai, uas haum rau cov yas nruab nrab-tawv. Qhov kev sim yooj yim thiab ua rau muaj kev puas tsuaj me ntsis rau cov khoom siv.

Hauv cov qauv ntsuas Rockwell hardness rau Peek polymer composite cov ntaub ntawv, R scale (HRR) thiab M scale (HRM) yog siv dav, ntawm cov R scale feem ntau siv.

Rau feem ntau cov khoom siv Peek ntshiab uas tsis muaj zog lossis tsis muaj zog (piv txwv li, cov iav fiber ntau ≤ 30%), qhov ntsuas R feem ntau yog qhov kev xaiv zoo tshaj plaws. Qhov no yog vim tias qhov ntsuas R yog qhov tsim nyog rau cov yas mos, qhov nyuaj ntawm cov khoom siv Peek ntshiab feem ntau yog li ntawm HRR110 txog HRR120, uas poob rau hauv qhov ntsuas ntawm qhov ntsuas R - tso cai rau kev cuam tshuam tseeb ntawm lawv cov nqi nyuaj. Tsis tas li ntawd, cov ntaub ntawv los ntawm qhov ntsuas no muaj kev sib txawv ntau dua hauv kev lag luam thaum sim qhov nyuaj ntawm cov khoom siv zoo li no.

Rau cov ntaub ntawv Peek composite uas muaj zog siab (piv txwv li, cov iav fiber/carbon fiber uas muaj ≥ 30%), feem ntau siv M scale vim lawv qhov nyuaj dua. M scale siv lub zog sim loj dua, uas tuaj yeem txo qhov cuam tshuam ntawm cov fibers reinforcing rau ntawm qhov indentations thiab ua rau cov ntaub ntawv sim ruaj khov dua.

Kev kuaj Rockwell hardness ntawm PEEK polymer composites yuav tsum ua raws li ASTM D785 lossis ISO 2039-2 cov qauv. Cov txheej txheem tseem ceeb suav nrog kev siv ib qho kev thauj khoom tshwj xeeb los ntawm lub pob zeb diamond indenter thiab xam qhov nyuaj raws li qhov tob ntawm qhov indentation. Thaum lub sijhawm kuaj, yuav tsum tau them sai sai rau kev tswj hwm kev npaj qauv thiab qhov chaw kuaj kom ntseeg tau tias qhov tseeb ntawm qhov txiaj ntsig. Ob qho tseem ceeb yuav tsum tau sau tseg thaum lub sijhawm kuaj:

1. Cov Qauv Yuav Tsum Tau Ua: Lub thickness yuav tsum yog ≥ 6 hli, thiab qhov roughness ntawm qhov chaw (Ra) yuav tsum yog ≤ 0.8 μm. Qhov no zam kev cuam tshuam cov ntaub ntawv los ntawm qhov tuab tsis txaus lossis qhov chaw tsis sib xws.

2. Kev Tswj Xyuas Ib Puag Ncig: Kev sim raug pom zoo kom ua nyob rau hauv ib puag ncig uas muaj qhov kub ntawm 23 ± 2 ℃ thiab qhov av noo ntawm 50 ± 5%. Kev hloov pauv ntawm qhov kub thiab txias tuaj yeem cuam tshuam rau qhov nyeem ntawv nyuaj ntawm cov ntaub ntawv polymer xws li Peek.

Cov qauv sib txawv muaj cov kev cai sib txawv me ntsis rau cov txheej txheem sim, yog li cov hauv qab no yuav tsum tau ua raws li yuav tsum tau txhais meej meej hauv kev ua haujlwm tiag tiag.

Qhov nyuaj ntawm qee cov khoom siv PEEK sib xyaw ua ke tuaj yeem tshaj HRC 50. Nws yog ib qho tsim nyog los sim lawv cov khoom siv kho tshuab los ntawm kev tshuaj xyuas cov ntsuas xws li lub zog tensile, lub zog flexural, thiab lub zog cuam tshuam. Cov kev ntsuam xyuas tus qauv yuav tsum tau ua raws li cov qauv thoob ntiaj teb xws li ISO thiab ASTM kom ntseeg tau tias lawv qhov zoo thiab kev ua tau zoo ruaj khov, nrog rau kev lav phib xaub kev nyab xeeb thiab kev ntseeg siab ntawm lawv cov ntawv thov hauv cov teb cuam tshuam.