Ukuhlelwa kunyeSfundaIzixhobo zokusika iCarbide eneCemented

Icandelo lokuqala

Isixhobo sisixhobo esiyimfuneko ekusikeni ukucutshungulwa, nokuba sisixhobo somatshini esiqhelekileyo, okanye isixhobo somatshini wolawulo lwamanani aphezulu (NC), iziko lomatshini (MC) kunye nenkqubo yokuvelisa eguquguqukayo (FMC), kufuneka ixhomekeke kwisixhobo ukugqiba ukusika. inkqubo. Ukuphuhliswa kwezixhobo kunempembelelo ngqo ekuphuculeni imveliso kunye nomgangatho wokucubungula. Izinto eziphathekayo, ulwakhiwo kunye nejometri zizinto ezintathu ezichaza ukusebenza kokusika kwesixhobo, apho ukusebenza kwesixhobo kudlala indima ebalulekileyo.

Njengenxalenye ebalulekileyo yezixhobo zesixhobo, i-carbide ene-cemented idlala indima engenakuthathelwa indawo ekusetyenzweni kwanamhlanje. I-Cemented carbide bubunzima obuphezulu, i-refractory metal carbide (WC, i-TiC, njl.) -isantya sentsimbi, ubushushu obuvumelekileyo bokusika ukuya kuthi ga kwi-800 ~ 1000 ℃, ubunzima obuqhelekileyo bobushushu be-HRC89 ~ 93, 760 ℃ ukuqina kwe-HRC77 ~ 85, ukusika isantya ukuya kuthi ga kwi-100 ~ 300m / min, ngaphezulu kwensimbi enesantya esiphezulu, Ubomi buphindwe kaninzi ukuya kumaxesha amaninzi entsimbi enesantya esiphezulu, kodwa amandla kunye nokuqina yi-1/30 ~ 1/8 yentsimbi enesantya esiphezulu, ukukwazi ukumelana nomothuko kunye nefuthe. Ngoku ibe yenye yezinto eziphambili zesixhobo.

I-International Organisation for Standardization (ISO) yahlula i-carbide yezixhobo zokusika zibe ziindidi ezintandathu:

1. Uhlobo P

Iqulunqwe WC, Co kunye 5% ~ 30% TiC, eyaziwa ngokuba tungsten titanium cobalt carbide, ibakala YT5, YT14, YT15, YT30, apho umxholo TiC 5%, 14%, 15%, 30%, ehambelanayo. Umxholo we-Co yi-10%, 8%, 6%, 4%, ubunzima HRA91.5 ~ 92.5. Tamandla okugoba ngama-900 ~ 1400MPa. Umxholo we-TiC unyukile, umxholo we-Co wehla, ubulukhuni kunye nokumelana nokunxiba kwanda, kodwa ukuqina kwempembelelo yehla kakhulu. Olu hlobo lwe-alloy lunobulukhuni obuphezulu kunye nokumelana nokunxiba, ukubambelela kakuhle kunye nokumelana nokusabalalisa kunye nokumelana ne-oxidation. Kodwa amandla okugoba, ukusebenza kokusila kunye nokuncipha kwe-thermal conductivity, ubushushu obuphantsi be-brittleness, ukuqina akubi. Ifanelekile kwimpahla yensimbi yokusika isantya esiphezulu. Ukuphakama komxholo we-Co we-alloy, ngcono amandla okugoba kunye nokuqina kwempembelelo, ilungele ukugoba. Umxholo we-Co uyancitshiswa, ubunzima, ukuxhatshazwa kokugqoka kunye nokuchasana nokushisa kwanda, kwaye kulungele ukugqiba. Ubudlelwane phakathi kwe-Ti element kwi-alloy kunye ne-Ti element kwi-umsebenzi-isiqwengaiya kuvelisa into enzulu yokuncamathela isixhobo, esiya kwandisa isixhobo sokunxiba kwimeko yokusika ubushushu obuphezulu kunye ne-friction factor enkulu, kwaye ayifanelekanga ukusetyenzwa kwensimbi engenasici kunye ne-titanium alloy.

2. Uhlobo K

Idityaniswe WC kunye Co, eyaziwa ngokuba tungsten cobalt tungsten carbide, amabanga asetyenziswa ngokuqhelekileyo YG6, YG8, YG3X, YG6X, equlathe Co of 6%, 8%, 3%, 6%. Ubunzima HRA89 ~ 91.5, ukugoba amandla 1100 ~ 1500GPa. Ulwakhiwo lwahlulwe lwaba luziinkozo ezirhabaxa, iinkozo eziphakathi kunye neenkozo ezicolekileyo. Ngokubanzi (ezifana ne-YG6, YG8) yesakhiwo sengqolowa ephakathi, i-carbide ecocekileyo (efana ne-YG3X, YG6X) equlethe inani elifanayo le-Co kunobunzima obuphakathi kweenkozo,yayoukunxiba ukumelana phezulu kancinci, ukugoba amandla kwayeubunzimazingaphantsi kancinci. Olu hlobo lokuqina kwe-alloy, ukugaya, ukuhanjiswa kwe-thermal kulungile, kukulungele ukusetyenzwa kwezinto ezinqabileyo..

3. Uhlobo M

Kwisiseko se-WC, i-TiC kunye ne-Co, i-TaC (okanye i-NbC) yongezwa ekubunjweni, ukongeza i-TaC (NbC) kwi-YT inokuphucula amandla ayo okugoba, amandla okukhathala, ukuqina kwempembelelo, ubunzima obuphezulu bokushisa, amandla kunye nokumelana ne-oxidation, ukunxiba. ukuchasa njalo njalo. Amabanga aqhele ukusetyenziswa YW1 kunye neYW2. Ingasetyenziselwa ukusetyenzwa kwesinyithi, iintsimbi ezingezizo i-ferrous kunye nentsimbi, kodwa inokuphinda isebenze i-alloy yobushushu obuphezulu, intsimbi engatyiwa kunye nezinye ezinzima.-to-inkqubo izixhobo.

4. Uhlobo H

Ikakhulu isetyenziselwa ukusika izinto eziphezulu eziqinileyo, ezifana nentsimbi eqinile, intsimbi epholileyo epholileyo njalo njalo. I-Cubic boron nitride PCBN idweliswe kwiKlasi H.

5.Uhlobo S

Isetyenziselwa ukusika izinto ezikwazi ukumelana nobushushu,super-alloys, njl.

6.Uhlobo H

Isetyenziselwa ukusika iintsimbi ezingenayo i-ferrous. I-PCD yedayimani yePolycrystalline ibandakanyiwe kwiklasi ye-N.

Kweli nqaku, ndikhankanye iintlobo ezintandathu ze-carbide enesamente ngokuhlela izixhobo zokusika, inxalenye elandelayo, kuya kubakho iintlobo ezintsha ze-carbide ene-cemented ukugqiba, nceda don.’t ulibale ukujonga isiqingatha esilandelayo ukuba unomdla.

I-ZZBETTER ivelisa iimveliso ze-TC / WC ezineminyaka engaphezu kwe-10 yamava, qhagamshelana nathi ukuba unayo nayiphi na imfuneko malunga nezixhobo ze-tungsten carbide okanye iimveliso ezinobunzima. Lindela umbuzo wakho, ngokuqinisekileyo sithembekile.