Isuzuma ry'Ubukomere bwa Rockwell ku binyabutabire bya PEEK Polymer Composites

PEEK (polyetheretherketone) ni ibikoresho bivanze bikozwe mu buryo bworoshye kandi bukozwe mu guhuza resin ya PEEK n'ibikoresho bikomeza imbaraga nka fibre ya karuboni, fibre y'ibirahure, na ceramic. Ibikoresho bya PEEK bifite ubukana bwinshi bifite ubukana bwo gushwanyagurika no gushwanyagurika, bigatuma biba byiza mu gukora ibice n'ibice bidashobora kwangirika bisaba inkunga ikomeye. Ubukana bwinshi bwa PEEK butuma igumana imiterere yayo idahinduka nubwo yakwihanganira imbaraga za mekanike no gukoreshwa igihe kirekire, ibi bikaba bituma ikoreshwa cyane mu nzego nko mu kirere, mu modoka, no mu buvuzi.

Ku bikoresho bya PEEK, ubukana ni ikimenyetso cy'ingenzi cy'ubushobozi bw'ibikoresho bwo kurwanya ubukana bw'ingufu zo hanze. Ubukana bwabyo bugira ingaruka zikomeye ku mikorere yabyo no ku mikoreshereze yabyo. Ubukana busanzwe bupimirwa ku bukana bwa Rockwell, cyane cyane igipimo cya HRR, gikwiriye pulasitiki iciriritse. Ikizamini ni cyoroshye kandi nticyangiza cyane ibikoresho.

Mu bipimo ngenderwaho byo gupima ubukana bwa Rockwell ku bikoresho bya Peek polymer, igipimo cya R (HRR) na M (HRM) ni byo bikoreshwa cyane, muri byo igipimo cya R kikaba gikoreshwa cyane.

Ku bikoresho byinshi bya Peek bidakomejwe cyangwa bidakomejwe cyane (urugero, ingano y'ibirahuri ≤ 30%), igipimo cya R akenshi ni cyo gikunze kuba cyiza. Ibi biterwa nuko igipimo cya R gikwiriye pulasitiki yoroshye, ubukana bw'ibikoresho bya Peek muri rusange buri hagati ya HRR110 na HRR120, biri mu rugero rwo gupima igipimo cya R—bituma agaciro kabyo k'ubukana kagaragara neza. Byongeye kandi, amakuru ava muri iki gipimo afite akamaro kanini mu nganda iyo zigerageza ubukana bw'ibikoresho nk'ibyo.

Ku bikoresho bya Peek bikomezwa cyane (urugero, fibre y'ikirahure/fibre ya karuboni ≥ 30%), igipimo cya M gikunze gukoreshwa bitewe n'ubukana bwabyo bwinshi. Igipimo cya M gikoresha imbaraga nyinshi zo gupima, zishobora kugabanya ingaruka z'imigozi yo gushimangira ku miterere y'ibice kandi bigatanga amakuru ahamye yo gupima.

Isuzuma ry’ubukana bwa Rockwell rya PEEK polymer composite rigomba kubahiriza amahame ya ASTM D785 cyangwa ISO 2039-2. Inzira y’ingenzi ikubiyemo gushyira umutwaro runaka binyuze mu gice cy’inyuma cya diyama no kubara agaciro k’ubukana hashingiwe ku burebure bw’inyuma. Mu gihe cyo gupima, hagomba kwitabwaho cyane itegurwa ry’icyitegererezo n’aho isuzuma ribera kugira ngo hamenyekane neza ko igipimo cy’umusaruro ari ukuri. Ibintu bibiri by’ingenzi bigomba kwitabwaho mu gihe cyo gupima:

1. Ibisabwa mu rugero: Ubunini bugomba kuba ≥ 6 mm, naho ubukana bw'ubuso (Ra) bugomba kuba ≤ 0.8 μm. Ibi birinda kwangirika kw'amakuru guterwa n'ubunini budahagije cyangwa ubuso budahuje.

2. Kugenzura ibidukikije: Isuzuma risabwa gukorwa ahantu hari ubushyuhe bwa 23±2℃ n'ubushyuhe bwa 50±5%. Ihindagurika ry'ubushyuhe rishobora kugira ingaruka zikomeye ku buryo ibikoresho bya polymer nka Peek bikomera.

Amabwiriza atandukanye afite ingingo zitandukanye gato ku buryo bwo gupima, bityo ishingiro rigomba gukurikizwa rigomba gusobanurwa neza mu bikorwa nyabyo.

Ubukana bw'ibikoresho bimwe na bimwe bya PEEK byuzuyemo imbaraga bushobora no kurenza HRC 50. Ni ngombwa gupima imiterere yabyo mu buryo bwa mekanike hasuzumwa ibimenyetso nk'imbaraga zo gukurura, imbaraga zo gukurura, n'imbaraga z'ingaruka. Ibizamini bisanzwe bigomba gukorwa hakurikijwe amahame mpuzamahanga nka ISO na ASTM kugira ngo harebwe ko ubuziranenge n'imikorere yabyo bihamye, ndetse no kwemeza umutekano n'ubwizerwe bw'ikoreshwa ryabyo mu nzego zibishinzwe.