Ukuhlaziywa Kwezakhiwo Zomzimba Zamapuleti E-Cemented Carbide

Amapuleti e-carbide anosimende, ahlanganiswe nezigaba ze-carbide eqinile (njenge-tungsten carbide) kanye nezibophezelo zensimbi (imvamisa i-cobalt), asetshenziswa kakhulu ekwenzeni imishini, izimayini, nobunjiniyela ngenxa yezakhiwo zabo ezinhle kakhulu zomzimba. Ukuhlaziywa okuningiliziwe kwezakhiwo zabo ezibalulekile zomzimba kubalulekile ukuze uqonde ububanzi bohlelo lwabo lokusebenza kanye nezinzuzo zokusebenza.

1. Ukuminyana

Ukuminyana kuyisisekelo esiyisisekelo samapuleti e-carbide kasimende, ngokuvamile asukela ku-12.0 kuya ku-15.0 g/cm³. Lokhu kuminyana okuphezulu ngokuyinhloko kubangelwa isisindo se-athomu esiphezulu se-tungsten ku-tungsten carbide (ingxenye eyinhloko). Ukuminyana okuphezulu kunikeza amapuleti ukuqina okuhle kwe-dimensional—awathambekele kangako ekuguquguqukeni ngaphansi kwamandla angaphandle noma ukushintsha kwezinga lokushisa, okubalulekile kumathuluzi wokwenza imishini adinga ukulawulwa okuqinile kosayizi. Ukwengeza, ukuminyana okuphezulu kuthuthukisa ukumelana komthelela wamapuleti ngezinga elithile, njengoba ukwakheka okuminyene kungamunca kangcono futhi kuhlakaze amandla omthelela wangaphandle.

2. Ubulukhuni kanye nokumelana nokugqoka

Ukuqina kungenye yezinto ezigqame kakhulu zamapuleti e-carbide anosimende. Ubulukhuni babo be-Vickers ngokuvamile budlula i-1500 HV, buphakeme kakhulu kunobensimbi yesivinini esikhulu nezinye izinto ezisetshenziswayo ezivamile. Lobu bunzima obuphakeme bubangelwa izigaba ze-carbide eziqinile, ezakha isakhiwo samathambo esiqinile. Okuhlobene eduze nobulukhuni ukumelana nokugqoka-ukuqina okuphezulu kusho ukuthi amapuleti angakwazi ukumelana nokunwaya, ukuhuzuka, nokunamathela kwezinto ngesikhathi sokusetshenziswa. Isibonelo, ekusikeni kwensimbi, amapuleti e-carbide anosimende agcina imiphetho ebukhali isikhathi eside ngaphandle kokugqokwa yi-workpiece material, enweba kakhulu impilo yesevisi yamathuluzi. Kodwa-ke, ukuqina kwamapuleti kungalungiswa ngokushintsha okuqukethwe kwe-binder yensimbi: ukwandisa okuqukethwe kwe-cobalt kunciphisa ubulukhuni kancane kodwa kuthuthukisa ukuqina, kuyilapho ukwehla kokuqukethwe kwe-cobalt kuthuthukisa ubulukhuni nokumelana nokugqoka.

3. Amandla Nokuqina

Nakuba amapuleti e-carbide anosimende eqinile kakhulu, amandla awo nokuqina kwawo kuyizinkomba ezibalulekile zokusebenza okungokoqobo. Amandla abo okuqhekeka okuguquguqukayo (TRS) ngokuvamile aqala ku-1500 kuya ku-3000 MPa, okubenza bakwazi ukumelana namandla aphezulu okugoba ngesikhathi somshini noma sokumba izimayini. Ukuqina, okubhekisela emandleni okumelana nokuphuka ngaphansi komthelela, ikakhulukazi kunqunywa isibopho sensimbi. Isibopho se-cobalt sakha isigaba se-ductile phakathi kwezinhlamvu ze-carbide eqinile, ukuvimbela imifantu ukuthi ingasakazeki ngokushesha lapho ipuleti lingaphansi komthelela. Le bhalansi yamandla aphezulu kanye nokuqina okumaphakathi igwema inkinga yokuba brittleness ehlupha ezinye izinto eziqinile kakhulu, okwenza amapuleti e-carbide anosimende afanele kokubili izimo zokusebenza ezinomthwalo ophezulu kanye nomthelela.

4. I-Thermal Expansion Coefficient kanye ne-Thermal Conductivity

I-thermal expansion coefficient yamapuleti e-carbide ayi-cemented iphansi kakhulu, ngokuvamile iphakathi kuka-5×10⁻⁶/°C kanye no-7×10⁻⁶/°C. Lokhu kunwebeka okuphansi kwe-thermal kuqinisekisa ukuthi amapuleti awaboni izinguquko ezibalulekile zobukhulu lapho evezwe ekushintshashintsheni kwezinga lokushisa (isb., phakathi nokusika ngesivinini esikhulu, lapho ukungqubuzana kukhiqiza ukushisa). Lokhu kuzinza kubalulekile ukuze kugcinwe ukunemba komshini, njengoba ukuguqulwa kwe-thermal kungaholela ekuphambukeni kobukhulu bengcezu yokusebenza. Mayelana ne-thermal conductivity, amapuleti e-carbide anosimende ane-conductivity yokushisa emaphakathi (100-150 W/(m·K)), okubavumela ukuthi badlulisele ukushisa okukhiqizwa ngokushesha kumphathi wamathuluzi noma ohlelweni lokupholisa. Leli khono lokukhipha ukushisa livimbela ukushisa okweqile kwendawo, okungathambisa isigaba sokuhlanganisa futhi kunciphise ubulukhuni bamapuleti nokumelana nokuguga.

Kafushane, izici ezingokomzimba zamapuleti e-carbide anosimende-ukuphakama okuphezulu, ukuqina okuhle kakhulu nokumelana nokugqoka, amandla alinganiselayo nokuqina, nokusebenza okuzinzile kokushisa-kuhlanganisa ukunquma ukusebenza kwabo okuphezulu emisebenzini ehlukahlukene yezimboni. Ukuqonda lezi zakhiwo kusiza ekukhetheni nasekusetshenzisweni kwamapuleti e-carbide enosimende, kukhuphule inani lawo elisebenzayo.