①Ukubumba. Intsimbi ye-GCr15 inomsebenzi ongcono wokubumba kunye noluhlu lobushushu bokubumbatungsten intsimbi ngundoibanzi. Imimiselo yenkqubo yokubumba ngokubanzi: ukufudumeza i-1050 ~ 1100 ℃, ubushushu bokuqala bokubumba i-1020 ~ 1080 ℃, ubushushu bokugqibela bokubumba buyi-850 ℃, kunye nokupholisa umoya emva kokubumba. Ulwakhiwo olubunjiweyo kufuneka lube ngumzimba ococekileyo we-spheroidal. Ulwakhiwo olunjalo lunokuthi lube ne-spheroidized kwaye lufakwe ngaphandle kokuqhelekileyo.
②Umlilo uqhelekile. Ubushushu obuqhelekileyo bokufudumala kwe-GCr15 yentsimbi ngokuqhelekileyo yi-900 ~ 920 ℃, kwaye izinga lokupholisa alikwazi ukuba ngaphantsi kwe-40 ~ 50 ℃ / min. Iziseko zokungunda ezincinci zinokupholiswa kumoya ongashukumiyo; iziseko zokungunda ezinkulu zinokupholiswa ngokuqhushumba komoya okanye ngesitshizi; iziseko zokungunda ezinkulu ezinobubanzi obungaphezulu kwe-200mm zinokupholiswa kwi-oyile eshushu, kwaye zikhutshelwe ukupholisa umoya xa ubushushu bomphezulu bumalunga nama-200°C. Uxinzelelo lwangaphakathi olwenziwe yindlela yokupholisa yokugqibela ye-tungsten yensimbi yokubumba inkulu kwaye kulula ukuyiqhekeza. Kufuneka ifakwe i-spheroidized annealed ngokukhawuleza okanye inkqubo yokunciphisa uxinzelelo kufuneka yongezwe.
③I-Spheroidizing annealing. Inkqubo yokufakwa kwe-spheroidizing annealing ye-GCr15 yentsimbi ngokubanzi: i-tungsten steel mold yokufudumeza ubushushu 770 ~ 790 ℃, ibambe ubushushu be-2 ~ 4h, ubushushu be-isothermal 690 ~ 720 ℃, ixesha le-isothermal 4 ~ 6h. Emva kwe-annealing, isakhiwo silungile kwaye i-pearlite efanayo ye-spherical kunye nobunzima be-217 ~ 255HBS kunye nokusebenza kakuhle kokusika. Intsimbi ye-GCr15 inokuqina okulungileyo (idayamitha yokuqina ebalulekileyo yokucima i-oyile yi-25mm), kwaye ubunzulu bomaleko oqinileyo ofunyenwe phantsi kokucinywa kwe-oyile bufana nobo bentsimbi yesixhobo sekhabhoni ngokucinywa kwamanzi.
Ixesha lokuposa: Aug-23-2024
