Gwajin Taurin Rockwell na Haɗaɗɗun Polymer na PEEK

PEEK (polyetheretherketone) wani abu ne mai inganci wanda aka ƙera ta hanyar haɗa resin PEEK tare da kayan ƙarfafawa kamar carbon fiber, gilashin fiber, da yumbu. Kayan PEEK masu ƙarfi suna da juriya ga karce da gogewa, wanda hakan ya sa suka dace da ƙera sassa masu jure lalacewa da abubuwan da ke buƙatar tallafi mai ƙarfi. Babban taurin PEEK yana ba shi damar kiyaye siffarsa ba tare da canzawa ba ko da bayan ya jure matsin lamba na injiniya da amfani na dogon lokaci, wanda hakan ke ba shi damar amfani da shi sosai a fannoni kamar su sararin samaniya, motoci, da kula da lafiya.

Ga kayan PEEK, taurin abu muhimmin alama ne na ikon kayan na juriya ga nakasa a ƙarƙashin ƙarfin waje. Taurinsa yana da tasiri mai mahimmanci akan aikinsu da aikace-aikacensu. Yawanci ana auna taurin ta hanyar taurin Rockwell, musamman ma'aunin HRR, wanda ya dace da robobi masu matsakaicin tauri. Gwajin yana da sauƙi kuma ba ya haifar da lahani ga kayan.

A cikin ka'idojin gwajin tauri na Rockwell don kayan haɗin polymer na Peek, ana amfani da sikelin R (HRR) da sikelin M (HRM) sosai, daga cikinsu ana amfani da sikelin R sosai.

Ga mafi yawan kayan Peek tsarkakakku marasa ƙarfi ko waɗanda ba su da ƙarfi sosai (misali, yawan zare na gilashi ≤ 30%), sikelin R yawanci shine zaɓin da aka fi so. Wannan saboda sikelin R ya dace da robobi masu laushi, taurin kayan Peek tsarkakakku gabaɗaya yana tsakanin kimanin HRR110 zuwa HRR120, wanda ke cikin kewayon aunawa na sikelin R - wanda ke ba da damar yin tunani daidai game da ƙimar taurin su. Bugu da ƙari, bayanai daga wannan sikelin suna da ƙarfi a cikin masana'antar lokacin gwada taurin irin waɗannan kayan.

Ga kayan haɗin Peek masu ƙarfi (misali, fiber na gilashi/fiber na carbon ≥ 30%), ana amfani da sikelin M sau da yawa saboda ƙarfinsu. Sikelin M yana amfani da ƙarfin gwaji mafi girma, wanda zai iya rage tasirin ƙarfafa zaruruwa akan ƙofofin shiga da kuma haifar da ƙarin daidaiton bayanai na gwaji.

Gwajin taurin Rockwell na mahaɗan polymer na PEEK zai bi ƙa'idodin ASTM D785 ko ISO 2039-2. Tsarin aikin ya ƙunshi amfani da takamaiman kaya ta hanyar shigar da lu'u-lu'u da kuma ƙididdige ƙimar taurin bisa ga zurfin shigar. A lokacin gwajin, dole ne a ba da kulawa ta musamman ga sarrafa shirye-shiryen samfurin da yanayin gwaji don tabbatar da daidaiton ƙimar sakamakon. Dole ne a lura da muhimman sharuɗɗa guda biyu yayin gwaji:

1. Bukatun Samfura: Kauri zai kasance ≥ 6 mm, kuma kauri na saman (Ra) zai kasance ≤ 0.8 μm. Wannan yana hana gurɓatar bayanai da rashin kauri ko saman da bai daidaita ba ke haifarwa.

2. Kula da Muhalli: Ana ba da shawarar yin gwaji a cikin yanayi mai zafin jiki na 23±2℃ da kuma ɗanɗanon da ya kai 50±5%. Sauye-sauyen zafin jiki na iya yin tasiri sosai ga karatun taurin kayan polymer kamar Peek.

Ma'auni daban-daban suna da ɗan bambanci kaɗan ga hanyoyin gwaji, don haka dole ne a bayyana ƙasa da za a bi a sarari a cikin ainihin ayyukan.

Taurin wasu kayan haɗin PEEK masu ƙarfi na iya ma wuce HRC 50. Ya zama dole a gwada halayen injinan su ta hanyar bincika alamomi kamar ƙarfin tauri, ƙarfin lanƙwasawa, da ƙarfin tasiri. Ya kamata a gudanar da gwaje-gwajen da aka daidaita bisa ga ƙa'idodin ƙasa da ƙasa kamar ISO da ASTM don tabbatar da daidaiton inganci da aikinsu, da kuma tabbatar da aminci da amincin aikace-aikacen su a fannoni masu dacewa.