①Ukukhohlisa. Insimbi ye-GCr15 inokusebenza okungcono kakhulu kokusebenza kanye nezinga lokushisa lokukhanga leisikhunta sensimbi ye-tungstenibanzi. Imithethonqubo yenqubo yokubumba ngokuvamile yile: ukushisa okungu-1050 ~ 1100 ℃, izinga lokushisa lokuqala lokuqamba elingu-1020~1080℃, izinga lokushisa lokugcina elingu-850 ℃, nokupholisa komoya ngemva kokufoja. Isakhiwo esibunjiwe kufanele sibe umzimba omuhle we-spheroidal flake. Isakhiwo esinjalo singaba yi-spheroidized futhi sifakwe ngaphandle kokujwayelekile.
②Yenza umlilo ube ojwayelekile. Izinga lokushisa elijwayelekile lokushisisa lensimbi ye-GCr15 ngokuvamile liyi-900~920℃, futhi izinga lokupholisa alikwazi ukuba ngaphansi kuka-40~50℃/min. Izisekelo zesikhunta ezincane zingapholiswa emoyeni onganyakazi; izisekelo zesikhunta ezinkulu zingapholiswa ngokuqhunyiswa komoya noma isifutho; izisekelo ezinkulu zesikhunta ezinobubanzi obungaphezu kuka-200mm zingapholiswa emafutheni ashisayo, futhi zikhishwe ukuze zipholise umoya lapho izinga lokushisa elingaphezulu lingaba ngu-200°C. Ukucindezeleka kwangaphakathi okwakhiwa indlela yokugcina yokupholisa yesikhunta sensimbi ye-tungsten kukhulu futhi kulula ukuqhekeka. Kufanele i-spheroidized annealed ngokushesha noma inqubo yokunciphisa ingcindezi kufanele yengezwe.
③I-Spheroidizing annealing. Ukucaciswa kwenqubo ye-spheroidizing annealing yensimbi ye-GCr15 ngokuvamile yilezi: izinga lokushisa le-tungsten steel isikhunta sokushisisa 770~790℃, izinga lokushisa elibamba 2~4h, izinga lokushisa le-isothermal 690~720 ℃, isikhathi se-isothermal 4~6h. Ngemuva kokufakwa kwe-anneal, isakhiwo silungile futhi i-pearlite eyindilinga efanayo enobunzima obungu-217 ~ 255HBS kanye nokusebenza okuhle kokusika. Insimbi ye-GCr15 inokuqina okuhle (ububanzi obuqinile bokuqina bokucisha uwoyela bungama-25mm), futhi ukujula kongqimba oluqinile olutholwe ngaphansi kokucisha uwoyela kuyafana nalokho kwensimbi yensimbi ye-carbon ngokucisha amanzi.
Isikhathi sokuthumela: Aug-23-2024
