???????? 40Cr ?? 42CrMo ????? ??????? ??? ????? ???????? ????? ?? ???? ???????? ????????? ?????? ??????? ???????? ?????????? ??????? ??? ??????? ????????? ?????? ?????? ??????? ????????? ??????? ??? ????? ?????? ?? ????????? ????? ????? ??????? ?? HRC58-HRC62? ??????? ?????? ???? ??? ???????? ???????? ????.

????? ?????? ?????? ?? ??????? ??? ??????? ????????? ?????????? ???????? ?? ?????: ??? ??????? ???????? ???? ????? ??????? ??? ??? ??? ?????? ???? ?????? ??????? ????????? ??? ?????? ???? ??????? ????????? ???????? ???? ??????? ????????? ???????? ???? ??????? ???????.

???? ?????? ??? ????? ???????? ????? ????? ?? ??????? ???????? ????????? ????? ???????? ???????? ????? ???? ????? ??????? ???????? ??????? ???????? ????????? ?????????.