▁area ▁in ▁China ▁is ▁the ▁same ▁as ▁that ▁in ▁Sweden ▁Sand vik ▁Um par g ▁which ▁is ▁the ▁leader ▁of ▁c ement ed ▁car b ide ▁industry ▁in ▁the ▁world . ▁At ▁the ▁same ▁time , ▁research ers ▁are ▁trying ▁to ▁improve ▁the ▁performance ▁of ▁c ement ed ▁car b ide ▁by ▁adding ▁rare ▁metal ▁car b ides . ▁For ▁example , ▁research ers ▁in ▁T ian jin ▁C ement ed ▁Car b ide ▁Research ▁Institute ▁add ▁ 1 % ▁Ta C ▁into ▁c ement ed ▁car b ide ▁drawing ▁dies ▁to ▁in hib it ▁gra in ▁growth ▁and ▁ref ine ▁gra in ▁size ▁in ▁the ▁s inter ing ▁process . ▁In ▁result , ▁the ▁service ▁life ▁of ▁this ▁kind ▁of ▁drawing ▁dies ▁is ▁greatly ▁longer ▁than ▁the ▁general ▁grade ▁Y G 8 . ▁In ▁Shang hai ▁Material ▁Factory , ▁the ▁Cob alt ▁content ▁is ▁decl ined ▁to ▁ 6 % ▁and ▁a ▁few ▁Ta C ▁are ▁added ▁into ▁c ement ed ▁car b ide ▁drawing ▁dies ▁in ▁the ▁s inter ing ▁process ▁so ▁that ▁the ▁production ▁volume ▁is ▁two ▁times ▁of ▁that ▁of ▁general ▁grade ▁when ▁stretch ing ▁A 3 ▁steel , ▁Y IF ▁steel , ▁co pper , ▁etc . ▁ ▁Str ucture ▁ ▁En tr ance ▁area : ▁the ▁region ▁from ▁the ▁entrance ▁area ▁to ▁the ▁working ▁area ▁is ▁generally ▁circular ▁arc ▁which ▁plays ▁a ▁transition ▁role ▁in ▁facil it ating ▁drawing ▁materials ▁into ▁the ▁working ▁area ▁so ▁that ▁the ▁materials ▁would ▁not ▁be ▁scratch ed ▁by ▁the ▁sh utt