Designation |
Symbol |
Description |
交貨狀態(tài) |
代號 |
說明 |
Cold finished (hard) |
BK(+C) |
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation |
冷加工(硬) |
最后冷加工之后不進(jìn)行熱處理, 從而管子只可能進(jìn)行很小的變形。 |
Cold finished (Soft) |
BKW (+LC) |
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding) |
冷加工(軟) |
最后熱處理之后進(jìn)行小變形量的冷加工, 對鋼管再加工時允許有限的冷變形(例如: 彎曲, 擴(kuò)口) |
Cold finished and stress-relieved |
BKS(+SR) |
Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree. |
冷加工后消除應(yīng)力退火 |
最后冷加工后在Acl點(diǎn)以下進(jìn)行退火, 以消除冷加工應(yīng)力。 |
Annealed |
GBK(+A) |
The last Cold forming process is followed by annealing in a controlled atmosphere. |
退火 |
最后冷加工之后,鋼管在保護(hù)氣體下進(jìn)行完全退火。 |
Normalized |
NBK(+N) |
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
正火 |
最后冷加工之后,鋼管在保護(hù)氣體下進(jìn)行正火。 |