cold-roll process

[Salvatio]

Hello, does anyone know where to find easily accessible detail literature review of cold-roll process especially in pickling line in metallurgical terms? For example, how does different structure will influence the pickling time and acid concentration use?

Thank you.

 

[swall]

As a starting point, I would suggest U.S. Steel's book, "The Making, Shaping and Treating of Steel".Available from ASM International and also found in many technical libraries.

 

[stanweld]

Are you pickling hot rolled strip prior to cold rolling?

 

[Salvatio]

yes, stanweld. the steel strips have to be pickled before further process. The current cold-roll mill i'm working in 6 lines, which are pickling, tandam, elec' cleaning, annealing, temper mill, and recoiling. Since i'm not too fimiliar with cold-roll, i wish you guys could help out. i'm currently stationed in pickling line, using deep tank, HCl

 

[TVP]

Salvatio,

The book recommended by swall is probably the best single resource/reference on steel. The 10th edition is the most recent edition that still covers all topics. The new 11th edition only covers Ironmaking, Steelmaking & Refining, and Casting. This book and other useful references are available from AIST:

http://shop.aist.org/ironsteel/prod...scssid=2DRK8PSDFLTH2L4H00SPN409QJS13X51&name=

Some other books to consider include the following:

http://www.amazon.com/gp/product/sitb-next/082478894X/104-0968782-5627932

 

[stanweld]

Also take a look at the ASM Metals Handbook on Cleaning.

In terms of the pickling process, temperature, acid concentration, inhibitor concentration and Iron concentration must be monitored at least on an 8 hr. shift basis. In general, we did not change speed, temp. acid concentration, etc. with regard to grade of steel (AISI 1006 to 1010)although, we did decrease speed when pickling a specific low Chromium alloyed steel.

When parameters were within the pre-established range, the principal problem that we encountered was rolled in scale (found after cold rolling) due to worn rolls and poor descaling practice at the hot strip mill. Close monitoring of the surface condition of the strip after pickling was the only method that could be used to control the problem during the pickling process. Speed would then be decreased to enhance the pickling process. The hot strip mill would be notified when problems were uncovered and they would check the rolls and replace and check descaling sprays and correct.