The technology is based on the use of high-speed friction energy. In the zone of frictional contact between the workpiece and the special strengthening tool, intensive heating of the surface layers of the workpiece occurs with simultaneous plastic deformation and rapid cooling. Such conditions make it possible to disperse the structure and saturate the near-surface layers with various alloying elements from technological media, which are fed to the processing zone. The depth and microhardness of the hardened near-surface layer, as well as the surface roughness, can be changed by processing modes. The obtained surface nanocrystalline structures have a reduced coefficient of sliding friction in comparison with hardened steel.
- heating of the near-surface layers of the part at a rate of 100,000-1,000,000 K / s;
- the thickness of the hardened layer on steels reaches 100-800 microns;
- microhardness 6-12 GPa;
- the roughness of the reinforced surface Ra = 0.4-3.0 microns;
- sliding friction coefficient 0.02-0.04.
The technology is easy to implement on lathes, circular and surface grinders, slightly modernizing them without large capital investments. The technology makes it possible to form specific fine-crystalline structures on the working surfaces of machine parts without changing the structure of the matrix material.
The technology makes it possible to form specific fine-crystalline structures on the working surfaces of machine parts without changing the structure of the matrix material. The use of technology increases the service life of machine parts.
The technology can be used at food, machine-building, coal and oil and gas industries to reinforce pump bushings and shafts, hydraulic cylinder rods, conveyor pins and compressors, end surfaces of gears and unloading rings of hydraulic pumps, working surfaces of paper cutting and woodworking knives and other cylindrical and flat-cut surfaces.
TECHNICAL AND ECONOMIC EFFECT:
The use of technology increases the service life of machine parts by 2-3 times with an increase in labor intensity by 20-30%.
The economic effect is obtained due to:
- increasing the resource of work;
- reduction of material and energy costs and repair costs.
Ready for implementation.
Introduced into production.
Realization of finished products.
2 patents of Ukraine.