Uhlalutyo lweePropati zoMzimba kwiiPlati zeCarbide eziQiniweyo

Amacwecwe e-carbide enziwe ngesamente, ahlanganiswe nezigaba ze-carbide ezinzima (ezifana ne-tungsten carbide) kunye nezibophelelo zetsimbi (ngokuqhelekileyo i-cobalt), zisetyenziswa ngokubanzi kwi-machining, imigodi, kunye nobunjineli ngenxa yeempawu zabo ezintle zomzimba. Uhlalutyo olucacileyo lweempawu zabo eziphambili zomzimba zibalulekile ekuqondeni umda wesicelo sabo kunye neenzuzo zokusebenza.

1. Ubuninzi

Uxinaniso yipropathi esisiseko yeepleyiti zekhabhide ezenziwe ngesamente, ezidla ngokuqala ukusuka kwi-12.0 ukuya kwi-15.0 g/cm³. Olu xinaniso luphezulu lusuka ikakhulu kubunzima beathom obuphezulu betungsten kwitungsten carbide (elona candelo liphambili). Uxinaniso oluphezulu lunika iiplate ngokuzinza okuhle kwe-dimensional-zincinci kakhulu kwi-deformation phantsi kwemikhosi yangaphandle okanye utshintsho lweqondo lokushisa, olubaluleke kakhulu kwizixhobo ezichanekileyo zokwenza izixhobo ezifuna ukulawulwa kobukhulu obungqongqo. Ukongeza, uxinaniso oluphezulu luphakamisa ukuxhathisa impembelelo yeepleyiti ukuya kumlinganiselo othile, njengoko isakhiwo esixineneyo sinokufunxa ngcono kwaye sisasaze amandla empembelelo yangaphandle.

2. Ubulukhuni kunye noKuthwala ukuNxina

Ukuqina yenye yezona zinto zibalaseleyo kwiipleyiti ze-carbide zesamente. Ubulukhuni babo beVickers ngokubanzi budlula i-1500 HV, buphezulu kakhulu kunobo bentsimbi enesantya esiphezulu kunye nezinye izixhobo eziqhelekileyo. Ubulukhuni obuphezulu bubangelwa izigaba ze-carbide ezinzima, ezenza isakhiwo esiqinileyo samathambo. Okunxulumene ngokusondeleyo nobunzima kukumelana nokunxiba-ubunzima obuphezulu buthetha ukuba iipleyiti zinokuxhathisa ukukrwela, ukuqhawuka, kunye nokubambelela kwizinto eziphathekayo ngexesha lokusetyenziswa. Ngokomzekelo, ekusikeni kwesinyithi, iipleyiti ze-carbide eziqiniweyo zigcina imiphetho ebukhali ixesha elide ngaphandle kokugqithwa phantsi kwezinto zokusebenza, ukwandisa kakhulu ubomi benkonzo yezixhobo. Nangona kunjalo, ubunzima bamacwecwe bunokutshintshwa ngokuguqula umxholo we-binder yensimbi: ukwandisa umxholo we-cobalt kunciphisa ukuqina kancinci kodwa kuphucula ukuqina, ngelixa ukunciphisa umxholo we-cobalt kwandisa ubunzima kunye nokuxhatshazwa kokugqoka.

3. Amandla kunye nokuqina

Ngelixa iipleyiti ze-carbide ezifakwe ngesamente zinzima kakhulu, amandla kunye nokuqina kwazo zikwayimiqondiso ebalulekileyo yokusebenza okusebenzayo. Amandla abo okuqhekeka okunqamlezayo (TRS) ngokuqhelekileyo aqala ukusuka kwi-1500 ukuya kwi-3000 MPa, ebenza bakwazi ukumelana nemikhosi ephezulu yokugoba ngexesha lomatshini okanye imisebenzi yemigodi. Ukuqina, okubhekiselele kwisakhono sokumelana nokuqhekeka phantsi kwempembelelo, ikakhulu kunqunywe yi-binder yensimbi. I-cobalt binder yenza isigaba se-ductile phakathi kweenkozo ze-carbide ezinzima, ukuthintela ukuqhekeka ukuba kusasazeke ngokukhawuleza xa iplate iphantsi kwempembelelo. Olu lungelelwaniso lwamandla aphezulu kunye nokuqina okuphakathi kuthintela ingxaki yobunzima obubetha ezinye izinto ezilukhuni, ukwenza iiplate ze-carbide ezifakwe ngesamente zilungele zombini umthwalo ophezulu kunye neemeko zokusebenza ezinempembelelo.

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

I-coefficient yokwandisa i-thermal ye-cemented carbide plates iphantsi, ngokuqhelekileyo phakathi kwe-5 × 10⁻⁶ / ° C kunye ne-7 × 10⁻⁶ / ° C. Oku kwandiswa kwe-thermal ephantsi kuqinisekisa ukuba iipleyiti azifumani utshintsho olubalulekileyo lwe-dimensional xa lubonakaliswe ekutshintsheni kweqondo lokushisa (umzekelo, ngexesha lokusika i-high-speed cut, apho i-friction ivelisa ukushisa). Olu zinzo lubalulekile ekugcineni ukuchaneka koomatshini, njengoko ukuguqulwa kwe-thermal kunokukhokelela ekuphambukeni kwimilinganiselo ye-workpiece. Ngokubhekiselele kwi-thermal conductivity, iipleyiti ze-carbide ze-cemented zine-moderate conductivity thermal conductivity (100-150 W / (m·K)), ezivumela ukuba zidlulisele ubushushu obuveliswe ngokukhawuleza kumphathi wesixhobo okanye inkqubo yokupholisa. Esi sixhobo sokulahla ubushushu sithintela ukufudumeza kwendawo, okunokuthi kuthambe isigaba se-binder kunye nokunciphisa ubulukhuni beepleyiti kunye nokumelana nokunxiba.

Isishwankathelo, iipropathi ezibonakalayo ze-carbide plates-ubuninzi obuphezulu, ubunzima obugqwesileyo kunye nokuxhatshazwa kokugqoka, amandla alinganayo kunye nokuqina, kunye nokusebenza okuzinzile kwe-thermal-ngokudibeneyo kugqiba ukusebenza kwabo okuphezulu kwizicelo ezahlukeneyo zoshishino. Ukuqonda ezi zakhiwo kunceda ekulungiseleleni ukhetho kunye nokusetyenziswa kweeplate ze-carbide eziqiniweyo, ukwandisa ixabiso labo elisebenzayo.