Menene kewayon aikin aiwatarwa a cikin ƙirƙira ƙirar ƙarfe tungsten?

① Yin jabu. GCr15 karfe yana da mafi kyau ƙirƙira yi da ƙirƙira zafin jiki kewayontungsten karfe moldyana da fadi. A jabu tsari dokokin ne kullum: dumama 1050 ~ 1100 ℃, na farko ƙirƙira zafin jiki 1020 ~ 1080 ℃, karshe ƙirƙira zafin jiki 850 ℃, da kuma iska sanyaya bayan ƙirƙira. Tsarin da aka ƙirƙira ya kamata ya zama jikin spheroidal flake mai kyau. Irin wannan tsarin za a iya spheroidized kuma annealed ba tare da al'ada.

② daidaita wutar. A normalizing dumama zafin jiki na GCr15 karfe ne kullum 900 ~ 920 ℃, da sanyaya kudi ba zai iya zama kasa da 40 ~ 50 ℃ / min. Ana iya kwantar da ƙananan sansanonin ƙira a cikin iska mai sanyi; za a iya sanyaya manyan sansanonin gyare-gyare ta hanyar fashewar iska ko fesa; Ana iya sanyaya manyan sansanonin gyare-gyare masu diamita fiye da 200mm a cikin mai mai zafi, kuma a fitar da su don sanyaya iska lokacin da zafin jiki ya kai kimanin 200 ° C. Danniya na ciki da aka kafa ta hanyar sanyaya ta ƙarshe na ƙirar ƙarfe tungsten yana da girma da sauƙi don fashe. Ya kamata a shafe shi nan da nan ko kuma a ƙara aikin kawar da damuwa.

③Spheroidizing annealing. A spheroidizing annealing tsari bayani dalla-dalla ga GCr15 karfe ne kullum: tungsten karfe mold dumama zafin jiki 770 ~ 790 ℃, rike da zazzabi 2 ~ 4h, isothermal zazzabi 690 ~ 720 ℃, isothermal lokaci 4 ~ 6h. Bayan annealing, tsarin yana da kyau kuma daidaitaccen pearlite mai siffar zobe tare da taurin 217 ~ 255HBS da kyakkyawan aikin yankewa. GCr15 karfe yana da kyau hardenability (mahimmancin hardening diamita ga man quenching ne 25mm), da kuma zurfin da taurare Layer samu karkashin man quenching shi ne kama da na carbon kayan aiki karfe ta hanyar ruwa quenching.