Overview
Specification / Application
Package
Inquiry
Surface treatment of piston rings
Chromium plating
The Vickers hardness of metallic chromium reaches 800-1000, and its melting point is 1800 degrees Celsius. Therefore, the piston rings treated with chromium plating have a very high resistance to abrasive wear and adhesive wear, and excellent wear resistance. It is currently one of the most widely used surface treatments for piston rings. At present, we have developed a chromium-based ceramic composite chromium plating technology of international level and have taken the lead in establishing a composite chromium plating production line in China to meet the demands of various advanced models.
2. Plasma spraying
The melting point of the molybdenum layer is 2600 degrees Celsius, and its surface and substrate are porous. The piston rings treated with molybdenum spraying have a strong anti-adhesive wear ability. Therefore, the piston rings treated with molybdenum spraying are widely used in various high-strength and high-load engines. We have also developed the ceramic spray plating technology for piston rings. The feature of this technology is that the ceramic coating is thick and has excellent wear resistance, which can be applied to various high-speed and high-load engines.
3. Nitriding
Nitriding is generally applied to steel piston rings. Compared with the chromium layer, the nitrided layer has higher hardness and a smaller coefficient of friction, thus the nitrided ring has higher wear resistance. In addition, since nitriding is formed by ion penetration and iron-based bonding, there is no problem of peeling or chipping due to poor bonding force. At present, we have not only established gas nitriding and salt bath nitriding production lines for steel rings, but also developed the world's leading glow ion nitriding production line for alloy cast iron rings, which is used to meet the demands of various models.
4. Infiltration of pottery
Through plasma chemical vapor deposition, ceramic materials penetrate the surface layer of metals, undergo bidirectional diffusion, and form metal-ceramic composite films with coexisting networks and ultrafine particles. Its characteristics are high hardness and toughness, low friction coefficient, small thermal conductivity, and firm combination. It can significantly reduce the wear of cylinder liners and piston rings, the consumption of engine oil, and improve fuel economy.
5. Chromium-based ceramic composite electroplating
By using a multi-electrode system, the hard chromium base layer is first electrodeposited - the hard chromium mesh pattern is processed - ceramic particles are embedded into the mesh pattern - the ceramic particles are fixed and the mesh pattern is sealed to form a unit composite layer. Then, through automatic circulation, the unit layers are superimposed to form a layered chromium-based ceramic composite material. The two major problems, namely the difficulty in recombining ceramic particles with chromium-based materials and the brittleness caused by the dispersion of ceramic particles at the grain boundaries of chromium-based materials, have been solved. A chromium-based ceramic composite material with a unique layered structure has been successfully developed. The ceramic particles are distributed in the original network and pores of hard chromium, and the ceramic recombination amount can reach up to 2-10%.
The models we strongly recommend：MAK281, MAK453, MAK551
.jpg)
.jpg)
.jpg)
.jpg)
.jpg)