Mayeso a Rockwell a kuuma kwa PEEK polymer composites

PEEK (polyetheretherketone) ndi chinthu chopangidwa ndi zinthu zambiri zopangidwa ndi utomoni wa PEEK pogwiritsa ntchito zinthu zolimbitsa monga ulusi wa kaboni, ulusi wagalasi, ndi ziwiya zadothi. Zinthu za PEEK zolimba kwambiri zimakhala zolimba kwambiri ku mikwingwirima ndi kusweka, ndipo ndizoyenera kupanga zinthu zosawonongeka zomwe zimafuna thandizo lamphamvu kwambiri. Kulimba kwambiri kwa PEEK kumaithandiza kuti isunge mawonekedwe ake ngakhale itakhala ndi mphamvu yamakina komanso ikugwiritsidwa ntchito kwa nthawi yayitali, zomwe zimapangitsa kuti igwiritsidwe ntchito kwambiri mumlengalenga, magalimoto, zamankhwala ndi zina.

Pa zinthu zopangidwa ndi PEEK polymer, kuuma kwa Rockwell ndi chimodzi mwa zizindikiro zofunika kwambiri poyesa momwe zimagwirira ntchito. Mfundo yoyesera ya kuuma kwa Rockwell imachokera ku njira yodziyimira, yomwe imatsimikiza kuuma kwa chinthucho poyesa kuzama kwa kudziyimira komwe kumapangidwa ndi indenter inayake yomwe imakanikiza pamwamba pa chinthucho pansi pa mphamvu yoyesera inayake. Kuphatikiza apo, ndikofunikiranso kuyesa mawonekedwe ake amakina poyesa mphamvu yake yolimba, mphamvu yopindika, mphamvu yokhudza, ndi zina zotero, ndikutsatira miyezo yapadziko lonse lapansi kapena yapadziko lonse monga ISO, ASTM, ndi zina zotero kuti tichite mayeso okhazikika kuti tiwonetsetse kukhazikika kwa khalidwe lake ndi magwiridwe antchito ake, ndikuwonetsetsa kuti chitetezo ndi kudalirika kwa kugwiritsidwa ntchito kwake m'magawo enaake.

Zotsatira za mayeso a kuuma kwa Rockwell zitha kuwonetsa mwachindunji kuthekera kwa zinthu zopangidwa ndi polymer za PEEK kuti zisawonongeke ndi kusintha kwa pulasitiki. Kuuma kwa Rockwell kwakukulu kumatanthauza kuti zinthuzo zimakhala ndi kukana kwambiri komanso kutopa, zomwe ndizofunikira kwambiri popanga ziwalo m'munda wa ndege, kuonetsetsa kuti ziwalozo zitha kugwira ntchito mokhazikika komanso kwanthawi yayitali m'malo ovuta amakina komanso m'mikhalidwe yovuta kwambiri; zikagwiritsidwa ntchito m'munda wamagalimoto kupanga ziwalo za injini ndi ziwalo zamagalimoto, zinthu zopangidwa ndi PEEK zolimba kwambiri zimatha kusintha moyo wautumiki ndi kudalirika kwa ziwalo; m'munda wazachipatala, zikagwiritsidwa ntchito popanga zida zopangira opaleshoni kapena zoyikamo, kuuma koyenera sikungotsimikizira magwiridwe antchito a chipangizocho, komanso kukwaniritsa kugwirizana kwa makina pakati pa choyikamo ndi minofu ya anthu. Nthawi yomweyo, zotsatira za mayeso a kuuma kwa Rockwell zingagwiritsidwenso ntchito ngati maziko ofunikira pakulamulira khalidwe, kugwiritsidwa ntchito kuyang'anira kukhazikika kwa magwiridwe antchito a zinthu za PEEK panthawi yopanga, komanso kupeza mwachangu mavuto abwino omwe amabwera chifukwa cha kusintha kwa zinthu zopangira, ukadaulo wokonza ndi zina.

Poyesa kuuma kwa Rockwell kwa zinthu za PEEK, mtundu wa indenter ndi mphamvu yoyesera ziyenera kusankhidwa moyenera malinga ndi mawonekedwe a zinthuzo komanso mtundu wa kuuma komwe kungatheke. Masikelo omwe amagwiritsidwa ntchito kwambiri ndi awa: HRA, HRB, HRC, HRE, HRR, HRL, HRM, ndi zina zotero.

Musanayambe mayeso ovomerezeka, onetsetsani kuti pamwamba pa mayeso a PEEK ndi pathyathyathya, posalala, komanso popanda mafuta, oxide layer kapena zonyansa zina kuti muwonetsetse kuti zotsatira za mayeso ndi zolondola. Ikani chitsanzocho mwamphamvu pa benchi yogwirira ntchito ya hardness tester kuti muwonetsetse kuti chitsanzocho sichikuyenda panthawi yoyeserera. Nthawi iliyonse mayeso akachitika, njira zogwirira ntchito za hardness tester ziyenera kutsatiridwa mosamala, ndipo hardness tester iyenera kugwiritsidwa ntchito pang'onopang'ono kuti mupewe kukhudzidwa. Pambuyo poti hardness yakhazikika kwa nthawi yomwe yatchulidwa, werengani ndikulemba mtengo wa hardness wa Rockwell wogwirizana ndi kuya kwa indentation. Kuti mupeze zambiri zoyimira, miyeso yambiri nthawi zambiri imachitika m'malo osiyanasiyana, monga kusankha malo 5 kapena kuposerapo osiyana oyesera, kenako zotsatira za muyeso zimasanthulidwa kuti ziwerengere magawo monga avereji ya mtengo ndi kupotoka kokhazikika.