Laser Cleaning Cold Steel Bar
A cold steel bar often carries mill scale, rust, and shop dirt on the rolled face. How even the scale is, whether the bar will be welded or painted next, and whether the beam leaves a heat tint that has to be cleaned again decide how the pass is run.
What This Video Shows
Short FqfW9CiKLCA shows pulsed laser clearing rust and mill scale from a cold steel bar in 34 seconds without grit.
Questions this footage answers
What does this Short show about cleaning a cold steel bar?
The clip is a 34-second pulsed-fiber demo on one cold-rolled steel bar. You see rust, mill scale, and surface oxidation leave the face while the bar stays in frame end to end. It is footage proof that contactless cleaning can clear oxide on cold steel stock, not a timed quote for every bar diameter or rust thickness.
Why avoid grit blast or acid pickle on cold steel bar stock?
Cold-drawn and cold-rolled bars often carry tight dimensional budgets, so any method that bites the metal is hard to reverse. Media blast profiles the surface and pickling can embrittle high-strength grades. The Short shows the laser path clearing soil while the bar outline stays readable, which is the goal when the stock itself must stay on size.
Can I copy this traveler straight onto another cold steel bar?
Use the Short to see the cleaning sequence and the oxide leaving the part, then coupon the next bar before production. A copied recipe can mark soft faces when rust is thinner than the demo piece. Match scrap of the same steel family first, especially ahead of weld prep or coating work.
What energy band keeps steel safe in this kind of pass?
Stay under the steel injury band on coupon scrap before you trust production stock, and stop once soil stops leaving the face. Published ns 1064 nm work on carbon steel puts rust clearing near 1.42–4.26 J/cm² and metal injury near 5.7–15 J/cm².