Ukuhlolwa Kokuqina Kwe-Rockwell Kwe-PEEK Polymer Composites

I-PEEK (i-polyetheretherketone) iyinto ehlanganisiwe esebenza kahle kakhulu eyenziwe ngokuhlanganisa i-PEEK resin nezinto zokuqinisa ezifana ne-carbon fiber, i-glass fiber, kanye ne-ceramics. Izinto ze-PEEK ezinobulukhuni obuphezulu zinokumelana okungcono nokuklwebheka nokuklwebheka, okwenza zifaneleke ukukhiqiza izingxenye nezingxenye ezingagugi ezidinga ukwesekwa okunamandla aphezulu. Ubulukhuni obuphezulu be-PEEK buyenza ikwazi ukugcina isimo sayo singashintshi ngisho nangemva kokubekezelela ukucindezeleka komshini kanye nokusetshenziswa isikhathi eside, okuvumela ukuthi isetshenziswe kabanzi emikhakheni efana nezindiza, izimoto, kanye nokunakekelwa kwezokwelapha.

Kwizinto ze-PEEK, ubulukhuni buyisibonakaliso esibalulekile sekhono lento yokumelana nokuguquguquka ngaphansi kwamandla angaphandle. Ubulukhuni bayo bunomthelela omkhulu ekusebenzeni nasekusetshenzisweni kwayo. Ubulukhuni buvame ukulinganiswa ngobulukhuni be-Rockwell, ikakhulukazi isikali se-HRR, esifanele amapulasitiki aqinile aphakathi nendawo. Ukuhlolwa kulula futhi akubangeli umonakalo omkhulu kule nto.

Ezindinganisweni zokuhlola ubulukhuni beRockwell zezinto ezihlanganisiwe ze-polymer zePeek, isikali se-R (HRR) kanye nesikali se-M (HRM) zisetshenziswa kabanzi, phakathi kwazo isikali se-R sisetshenziswa kakhulu.

Ezintweni eziningi ze-Peek ezihlanzekile ezingaqiniswanga noma eziqiniswa kancane (isb., okuqukethwe kwefayibha yengilazi ≤ 30%), isikali se-R ngokuvamile siyindlela ekhethwayo. Lokhu kungenxa yokuthi isikali se-R sifanele amapulasitiki athambile, ubulukhuni bezinto ze-Peek ezihlanzekile ngokuvamile busukela cishe ku-HRR110 kuya ku-HRR120, okuwela ngaphakathi kobubanzi bokulinganisa besikali se-R—okuvumela ukubonakaliswa okunembile kwamanani azo obulukhuni. Ngaphezu kwalokho, idatha evela kulesi sikali inobubanzi obuqinile embonini lapho kuhlolwa ubulukhuni bezinto ezinjalo.

Ukuze uthole izinto ezihlanganisiwe ze-Peek eziqiniswa kakhulu (isb., okuqukethwe kwe-fiber yengilazi/i-carbon fiber ≥ 30%), isikali se-M sivame ukusetshenziswa ngenxa yobunzima baso obuphezulu. Isikali se-M sisebenzisa amandla amakhulu okuhlola, anganciphisa umthelela wemicu yokuqinisa ekungeneni futhi kuholele kudatha yokuhlola eqinile kakhudlwana.

Ukuhlolwa kobulukhuni beRockwell kwama-PEEK polymer composites kufanele kuhambisane nezindinganiso ze-ASTM D785 noma ze-ISO 2039-2. Inqubo eyinhloko ihilela ukusebenzisa umthwalo othize nge-indenter yedayimane nokubala inani lobulukhuni ngokusekelwe ekujuleni kwe-indenter. Ngesikhathi senqubo yokuhlola, kufanele kunakwe ngokukhethekile ekulungiseleleni isampula kanye nendawo yokuhlola ukuqinisekisa ukunemba kwenani lemiphumela. Izinto ezimbili ezibalulekile kumele ziqashelwe ngesikhathi sokuhlola:

1. Izidingo Zesampula: Ubukhulu buzoba ngu-≥ 6 mm, kanti ubulukhuni bomphezulu (Ra) buzoba ngu-≤ 0.8 μm. Lokhu kugwema ukuphambuka kwedatha okubangelwa ukujiya okunganele noma ubuso obungalingani.

2. Ukulawulwa Kwemvelo: Kunconywa ukuthi ukuhlolwa kwenziwe endaweni enezinga lokushisa elingu-23±2℃ kanye nomswakama ohlobene ongu-50±5%. Ukushintshashintsha kwezinga lokushisa kungathinta kakhulu ukufundwa kobulukhuni bezinto ze-polymer ezifana ne-Peek.

Izindinganiso ezahlukene zinezinhlinzeko ezihlukile kancane zezinqubo zokuhlola, ngakho-ke isisekelo esingezansi okufanele silandelwe kumele sichazwe ngokucacile ekusebenzeni kwangempela.

Ubulukhuni bezinto ezithile ezihlanganisiwe ze-PEEK eziqinisiwe bungadlula ngisho ne-HRC 50. Kuyadingeka ukuhlola izakhiwo zazo zemishini ngokuhlola izinkomba ezifana namandla okudonsa, amandla okuguquguquka, kanye namandla okushaya. Ukuhlolwa okujwayelekile kufanele kwenziwe ngokuhambisana nezindinganiso zomhlaba wonke ezifana ne-ISO ne-ASTM ukuqinisekisa ukuzinza kwekhwalithi nokusebenza kwazo, kanye nokuqinisekisa ukuphepha nokuthembeka kwezicelo zazo emikhakheni efanele.