???? ???? ???? ???? ????, ????? ??? ????, ??? ???, ???, ??????? ?????? ?????. ????? ???? ????? ??????? ????? ??????? ???????? ?????? ????? ????? ????? ??????? ???? ?????. ??? ????? ???? ???? ?????? ???? ????? ??????? ????? ?? ???? ?? ????? ??? WC-Co. ????? ??? WC-Co ??? ????? (??????? ?????) ??? ???? ??? ???? ??? ??? ????? ??? ????? (?????). ?????, ?????? ????? ????? ??? ??????? ?????. ??? ?? ???? ???? ?? ??? ?????? ???? ??? ????, ???? ??? ?? ????? ?????. ??? ??????? ??????? ?????? ?? ????? ?????? ?? ?????, ???? ??? ????? ???? ???? ????????? ???? ?? ???? ???, ?? ?????? ??????? ?????? ????. ?? ????? ?? ???? ?? ???? ?????, ?????? embrittlement ???? ??????? ?????. ????? ?? ????? ?? ?????? ?????. ?????????? ??????, ?????? ?? ??????? ????? ????? ??????. ???? ????????? ????? 600 ℃, ?????? ?? ????? ctungsten ????? ????? ??? ????? ??????? ????? ?????? ???????? ???. ???? ??? ??? ????? ???? ???? ???? ?????? ?? ????? ?????? ??? ???, ??? ?? ?? ??????? ???? ?? ?????? ???????. ?????? ????? ?????? ?? ????? ??? ???? ?? ??? ??????? ?????? ??? ????? ????? ???? ?? ????. ???????? ??? ?? ?????? ??????? ?? ??????? ???? ?? ???? ??????.
????? ?? ??????? ????? ?????? ???? ????? ??????? ?????, ???? ????? ???? ???? ?? ????. ?????, ????? ????? ???? ????? ??????? ?????, ??? ????? ???? ????? ??????, ???? ?????? ????? ?? ?????? ?????, ????? ???? ?? ????? ????? ?? ????, ?????? ??????? ?? ??????? ?????:
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2. ????? ?????? ????? ????? ????, ????? ???? ???? ????? ????.
3. ????? ?? ???? ????? ????? ?????? ????? ????? ????? ????? ????, ????? ?????, ???? ??? ???? ? -0.5 ?????.
????? ???? ?????? ??????? ?????, ????? ?????, ????? ?????? ????? ?? ???? ???? ???? ????? ??????? ?????, ????? ??? ???? ??? ?????. ???????, ???? ????? ??????? ????? ????? ?????? ????? ???? ????? ???????, ?? ?? ??? ????? ??????. ????? ???? ?????? ??????? ????? ????? ????, ??????, ????? ???????????? ????? ?? ????? ???? ???? ???? ????? ???? ??.
???? ???? Tube ??? ?????? ???? ????, ????? ?????, ????? ?????? ????? ????? ??? ????? ??????? ?? ????? ??? ?? ??????? ??????? ????? ???? ???????, ???? ?? ????? ???? ??????? ?????, ?????, ????? ????? ??????? ?? ???? ???????, ???? ???? ???? ????????? ?????? ????? ?? ???? ????? ??????. ???? ????? ?????? ?? ???? ??????, ??? ?????? ??? ?? ?????.
?????? ????????? ??????? ?? ?? ???? ?????? ????? ????? ????? ?????, ?????? ?????, ?????, ???? ???? ????? ?? ??????.?????? ?????, ??? ?????? ?????? ???? ????? ????, ???? ??????? ?????, ??? ??? ?????? ?????, ???? ????? ???? (???? YG15, YG20). ?? ??????? ????? ????? ???, ????? ?????? ?????, ??????? ?????, ???????? ?????, ?????? ???? ???????, ????? ???? ??????? ?????? ??????? ???, ?? ????? ?? ?????? ???????? ??????? ?? ????? ??.
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