Isesengura ryibintu bifatika bya plaque ya Carbide

Isahani ya sima ya sima, igizwe nicyiciro gikomeye cya karbide (nka tungsten karbide) hamwe nicyuma cyuma (mubisanzwe cobalt), gikoreshwa cyane mugutunganya, gucukura amabuye y'agaciro, no mubwubatsi kubera imiterere myiza yumubiri. Isesengura rirambuye kumiterere yingenzi yumubiri ningirakamaro mugusobanukirwa urwego rwimikorere nibyiza byo gukora.

1. Ubucucike

Ubucucike ni umutungo wibanze wibiti bya sima ya sima, mubisanzwe kuva kuri 12.0 kugeza 15.0 g / cm³. Ubucucike buri hejuru buturuka ku buremere buke bwa atome bwa tungsten muri karbide ya tungsten (igice nyamukuru). Ubucucike buri hejuru butanga amasahani hamwe nuburinganire bwiza - ntibakunze guhinduka bitewe nimbaraga zo hanze cyangwa ihinduka ryubushyuhe, ibyo bikaba ari ingenzi kubikoresho byo gutunganya neza bisaba kugenzura ingano nini. Byongeye kandi, ubucucike buri hejuru bwongera imbaraga zo guhangana n’isahani ku rugero runaka, kubera ko imiterere yuzuye ishobora gukurura no gukwirakwiza ingufu z’ingaruka zo hanze.

2. Gukomera no Kwambara Kurwanya

Gukomera ni kimwe mu bintu bigaragara cyane bya plaque ya karbide. Ubukomezi bwabo bwa Vickers muri rusange burenga HV 1500, burenze kure ubw'ibyuma byihuta cyane nibindi bikoresho bisanzwe. Uku gukomera gukomeye kwitirirwa ibyiciro bya karbide, bigizwe na skeleton ikomeye. Bifitanye isano cyane no gukomera ni ukurwanya kwambara - gukomera cyane bivuze ko amasahani ashobora kurwanya gushushanya, gukuramo, no gufatira ibintu mugihe cyo gukoresha. Kurugero, mugukata ibyuma, plaque ya karbide isima ikomeza impande zogukata igihe kirekire utarinze kwambarwa nibikoresho byakazi, byongerera cyane umurimo wibikoresho. Nyamara, ubukana bwamasahani burashobora guhinduka muguhindura ibiri mubyuma: kongera ibinini bya cobalt bigabanya ubukana buke ariko bikanoza ubukana, mugihe kugabanya ibirimo cobalt byongera ubukana no kwambara birwanya.

3. Imbaraga no gukomera

Nubwo isahani ya karbide isima irakomeye cyane, imbaraga zabo nubukomezi nabyo ni ibimenyetso byingenzi byerekana imikorere ifatika. Imbaraga zabo zo guturika (TRS) mubusanzwe ziri hagati ya 1500 na 3000 MPa, zibafasha guhangana ningufu zunamye mugihe cyo gutunganya cyangwa gucukura amabuye y'agaciro. Gukomera, bivuga ubushobozi bwo kurwanya kuvunika kwatewe, bigenwa ahanini nicyuma gihuza. Igikoresho cya cobalt kigizwe nicyiciro gihindagurika hagati yintete zikomeye za karbide, bikarinda ibice gukwirakwira vuba mugihe isahani yibasiwe. Uku kuringaniza imbaraga nyinshi hamwe no gukomera birinze birinda ikibazo cyubugome bwibasira ibikoresho bimwe na bimwe bikabije, bigatuma plaque ya karbide ya sima ikwiranye nakazi gakomeye kandi gakunda gukora.

4. Coefficient yo Kwagura Ubushyuhe hamwe nubushyuhe bwumuriro

Coefficente yo kwagura ubushyuhe bwa plaque ya karbide ya sima iri hasi cyane, mubisanzwe hagati ya 5 × 10⁻⁶ / ° C na 7 × 10⁻⁶ / ° C. Uku kwaguka k'ubushyuhe buke kwemeza ko amasahani adafite ihinduka rikomeye mugihe ihuye nihindagurika ryubushyuhe (urugero, mugihe cyo guca umuvuduko mwinshi, aho guterana bitanga ubushyuhe). Uku gushikama ningirakamaro mugukomeza gutunganya neza, kuko ihindagurika ryumuriro ryaganisha ku gutandukana mubikorwa byakazi. Kubijyanye nubushyuhe bwumuriro, plaque ya karbide ya sima ifite ubushyuhe buringaniye (100-150 W / (m · K)), ibemerera kohereza ubushyuhe bwihuse kubikoresho cyangwa sisitemu yo gukonjesha. Ubu bushobozi bwo gukwirakwiza ubushyuhe burinda ubushyuhe bwaho, bushobora koroshya icyiciro cya binder no kugabanya ubukana bwamasahani no kwihanganira kwambara.

Muri make, ibintu bifatika bya plaque ya karbide ya sima - ubucucike bwinshi, ubukana buhebuje no kwihanganira kwambara, imbaraga zingana nimbaraga, hamwe nubushyuhe buhamye bwumuriro - hamwe byerekana imikorere yabo myiza mubikorwa bitandukanye byinganda. Gusobanukirwa niyi mico bifasha mugutezimbere guhitamo no gukoresha plaque ya karbide ya sima, kugwiza agaciro kayo.