HEROLL – Prevention of hydrogen embrittlement of cold rolling rolls by improved work roll material and lubricant configuration

Situation:

• Increasing number of cold rolling work rolls failures, induced through hydrogen.
• Damages and/or failures can also cause dangerous explosions of the work roll bodies (spalling; safety aspect).
• One reason is the increased mechanical loads during processing.
• The difficulties will even increase as the production rates of materials are rising and the protective plating materials are supposed to be banned.

Solution:

• Evaluation of process data and work roll history of selected cold rolling processes
• Description / Simulation of failure mechanism
• Development of suitable tribological testing device(s) for material and lubricant testing
• Targeted lubricant and material development
• Intensive tribological testing and identification of potential critical control parameter / suitable control devices
• Industrial implementation

Operational benefit:

• Increase of service capability of cold rolling work rolls
• Decrease / prevention of work roll material failure
• Clarification of failure mechanism and sources
• Optimisation of work roll material and lubricant configuration

• Cold Rolling
• Cold Rolling Mill
• Cr-VI Plating
• Delayed Cracking
• Electro less nickel coating
• Hydrogen Embrittlement
• Lubricants
• Roll materials
• Safety
• Stress corrosion
• Working Rolls