Rolls and Shafts Plasma Spray Coating for Dimensional Restoration

Application fields:

Paper and printing machine rolls, steel mill rolls and rolls journals, pump and motor shafts, gearbox shafts, hydraulic piston rods, and sealing surfaces of rotating equipment.

Technical principles and processes:

The part is degreased, masked and grit blasted, then pre-machined where the wear is deep. Coating is applied by atmospheric plasma spray (APS) with powder selected for the duty, alternatively HVOF for carbide layers. The part is finish ground and polished on a cylindrical grinder, with roundness, hardness and coating thickness recorded.

Coating performance:

Restores dimension from a few hundredths up to several millimetres
Coating options: alumina and chrome oxide ceramic, WC carbide, Ni-based alloys
Finish ground and polished, Ra 0.4 or better where required
Micro-hardness from 700 HV (ceramic) to 1400 HV (carbide)
Dimensional and hardness report supplied with every part

辊类与轴类等离子喷涂修复：针对磨损、拉伤、腐蚀导致的尺寸超差，用等离子喷涂恢复尺寸并附加陶瓷或碳化钨耐磨层，磨削至图纸公差。

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