|
Designation |
Symbol |
Description |
|
寄遞情況 |
商標 |
作出說明 |
|
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 |
|
冷進行加工（硬） |
最終冷進行加工隨後不開展熱采用相應辦（bàn）法解決， 進而管材隻或許（xǔ）開展最小的蛻變。 |
|
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) |
|
冷進行加工（軟） |
最終熱采用相應辦法解決隨後開展小蛻變量的冷進行加工， 對無縫鋼管再進行加工時決定著名的（de）冷蛻變（biàn）（比（bǐ）如： 躬身行禮， 擴口） |
|
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. |
|
冷進行加工後需要剪應力退學 |
最終（zhōng）冷進行（háng）加工後在Acl點這陣兒開展（zhǎn）退（tuì）學， 以需要冷進行加工剪應力。 |
|
Annealed |
utf-8（+A） |
The last Cold forming process is followed by annealing in a controlled atmosphere. |
|
退學 |
最終冷進行加工隨（suí）後，無縫鋼管在維護固體下開展全部退學。 |
|
Normalized |
NBK（+N） |
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
|
正火 |
最終冷進行加工隨後，無縫鋼管在維護固體下開（kāi）展（zhǎn）正火（huǒ）。 |
