Cold Drawing: Hot Rolled bar is descaled, pulled through Tungsten Carbide or High Speed Steel die, straightened & cut-to-length. Improves dimensional tolerance and shape, straightness, surface finish, strength and machinability. The bars and tubes are thus Cold Drawn Steel Bright Bars (CD Bars) or Cold Drawn Tubes & Pipes (CDW / CDS). Similar process is used to make Wires from Wire Rods or Wire Rod Coils (WRC).
Turning and Polishing: Remove bar surface of Hot Rolled bars with revolving cutting tool, rotate bar through rolls to straighten and polish, then cut-to-length. Improved dimensional tolerances and removes surface defects and decarburization.
Grinding: Abrasive wheel grinds off surface metal. Improves surface finish and achieves very close dimensional tolerances.
Cold Rolling: Descale, pass through series of rolling stands, strengthening and cut-to-length. Improves dimensional tolerance and shape, surface finish and strength.
All of the cold finishing processes have a few common features and they are -
- These is a high degree of control on the cross sectional dimensions
- The surface finish in each of the case is very good
- The surface is relatively clean
There are some other related processes w.r.t bright bars.
Bright Bars have significant advantages and benefits over Hot Rolled Bars or Black Bars. Some of the most common areas of application of Bright Bars are listed here. Bright Bars can be offered in various conditions.
