Restoration of a working surface and shaft necks (calender rolls, calibration, tension, contact rolls, etc.)

The problems solved with the gas-thermal coatings:

• lack of drawing data on a worn-out part;
• long term of production;
• high cost of repair and purchase of a new calender shaft;
• originality of a product;
• import substitution;
• the high cost of shaft transportation on repair to the producer, including the customs duty.

Calender shafts are used in the following branches:

• Polygraphy.
• Light industry (the consumer goods from PVC, rubbers, plastics, etc.).
• Textile branch.
• Wood processing industry.
• Chemical industry.

Use of gas-thermal spraying technologies allows to:

• Increase a shafts working life by 3-4 times in comparison with galvanic chrome coated shafts.
• Lower costs of repair and purchase of import expensive accessories.
• Reduce equipment downtime terms under repair.
• Gain considerable economic effect.
• Refuse galvanic methods of coatings in favor of environmentally friendly gas-thermal spraying methods.

Gas-thermal coatings are:

• resource-saving;
• eco-friendly;
• economic;
• increasing parts working life by 3-4 times.
  

Increase in time of working life happens due to use of more solid coating material (carbides), than base shaft material (cast iron). Hardness of the received coating — more than 70 HRC, thickness of a finishing layer — 250-300 microns, adhesion — more than 70 MPas.