51吃瓜

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Qb/Mpa ??? ????? ????????? ??????? Q195//315-390A1 ?? ????? ??? ??? ?? ????? ???? ???? ???? ????? ???? ???? ???? ???? ????? ???? ????? ???? ???? ??? ???? ???? ?? ??? ??????? ??? ???? ??. Q215A335-410A2 ?? ?????? ?? ??? ??????? ??? ???? ??? ????? ???? ???????? ????? ???????? ????? ??? ????? ???? ?? ???? BC2Q235A375-460A3A ??? B ??? ???? ??????? ?????? ?? ????? ?? ??? ??????? ??? ???? ???? ??????? ?? ???????????? ?????? ?? ??? ?? ??? ?? ???? ?? ????? ?? ???? ?? ???? ???? ?????? ????? ???? ???? ??? ?????? ?? ???? ??????? ??? ???? ???? ?? ?? ???? ?? ????? ??? ??????? ????? ?? ??? ??????? ??? ???? ??. BB3C//D//Q255A410-510A4 ?? ???? ?? ???? ?? ????? ?????? ????? ?? ??? ??????? ??? ???? ??? ???? ????? ????????? ???? ????? ???? ????? ???? ??? ??? ??? ?? ???? ?????? ???? ???? ???? ??. BC4Q275//490-610C5 ???? ???? ?? ???? ?? ???? ?????? ????? ?? ??? ??????? ??? ???? ?? ???? ???? ???????? ??? ??? ????

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????? ???? ???? ????? ??? ????? ?? ???? ???? (), ???? ???????? ??? ???? ???? ????? ?????? 15 ??? ?????? 148 ?????????? ??? ????; Both welding performance and cold pressing performance are excellent, but the strength is low. It is used to manufacture parts, fasteners, stamped parts with low stress and high difficulty requirements, as well as low load parts that do not require heat treatment, such as bolts, screws, braces, flanges, etc. 99-143 ?????? ?????? ????? ?? ????? 20 ???? ?? ??? ?? 156 ?????? ????? ?? ????? ???? ?? ??? ??????? ??? ???? ??? ?? ???? ????? ?? ?????? ???? ????? ???? ???? ???? ?? ????? ???? ???? ???? ?????? ????? ????? ???? ?????? ?? ???? ??? ????? ???? ?? ???? ?? ?? ??????? ??? ??????? ????? ?? ??? ?? ?? ???? ??? ???? ??? ????? ??? ??? ???? ?? ???? ???? Normalization tempering 103-15645 Normalization 197-241 is used to manufacture parts that require high strength and moderate hardness. It is usually used in quenched and tempered, normalized states, with a quencing hardness of 40-50 HRC, such as gears, racks, sprockets, shafts, keys, pins, compressor and pump parts, and shaft rollers. ?? ???????? ????? ?? ??? ??????? ???? ???? ?????? ???? ??? ???? ??? ???? ?? ?? ??? ????? ???? ?????? ?? ???? ??? ??????? ?? ????? ??????? ?? ????? ??. ????????? 156-217217-25560229-255 ?? ????? ??? ????? ????? ???? ??? ??????? ??? ???? ?????? ?? ???? ??? ???? ??. ??? ????? ????? ?????? ?? ???? ???? ??? ???? ???? ???? ??? ?????? ?? ??? ??????? ??? ???? ??. ?? ?? ??? ????? ????? ????? ???? ??? ???? ????? ?? ??? ??????? ??? ???? ??? ????? ?????? ?? ??? ?? ??????????. 20Mn ?? 197 ????? ?? ???? ????? ?? ?????? ?? ???? ???? ??? ?? ?? ??? ?? ???? ?? ???? ??????? ????? ?? ?? ????????? ???? ??????? ????? ???? ???? ??? ???? ?? ??? ??????? ?? ???? ??. ?? ?? ????? ????? ??? ??? ????? ?????? ????? ???? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ????? ???? ?????? ?? 45 ????? 0.5% ?? ????? ???? ??? ?? ????? ???? ??? 60Mn ????? 0.6% ?? ??????? ???? ??? ?? ????? ???? ??? ??? manganese ??? ????? 0.7% ~1%.