Antifriction bearing layer plating process

Antifriction bearing layer plating process
Antifriction bearing layer plating process: If the direct plating on the lining of metal friction coating, the coating of the tin easily spread to the lining, making the bush working for some time, the tin coating decreased to less than 6% ( quality). And whether it is copper alloy or aluminum alloy liner lining, which contains a certain amount of copper, spread to the lining of tin with copper in the formation of brittle intermetallic compounds (Cu3Sn). This will not only decrease the mechanical properties of the coating, and destruction of the lining of the structure, to make the bearing of the overall mechanical performance. Solve the problem is in the lining of the underlying friction between the material and a layer of nickel or nickel-plated alloy barrier layer (also known as gate or barrier layer), the lining of tin to inhibit proliferation.
1, protective layer of tin or tin-lead alloy corrosion in addition has a certain role, in the bush during the proliferation of ways you can add friction layer of tin content, so the content of each component in a relatively stable state. In addition, because this layer of protection layer does not containslide bearing copper, relatively soft, so bearing in the early stages of the work will be able to achieve a good run-in requirements. This paper mainly on the bearing friction layer plating process.
2, the development process: anti-friction coating in the early start of the study abroad. 1920 by Grove Off (J. Grooff) pewter plating made the first patent, and torpedoes for the Navy plating the inner surface of cylinders, the forties of the twentieth century began for bearing plating. 1952 Schultz (Schults) made of aluminum and Al-Si in (AlSi) alloy substrate plating tin copper Alloy patent. 1953 Stanishev (Schoefe) has published tin bearing copper alloy with a review. In 1976, Jong-SangKim, Su-ιι Pyun and Hyo-Geun Lee issued a "tin plating of copper crystal orientation and morphology," the paper [7]. 1980, Beebe (Beebe) made of copper 2 to 3% (mass), tin 9 to 12% (mass), the rest of the copper production process of ternary alloy plating, coating thickness of 15μm. 1982 Waterman (Waterman) and others on the ternary alloy plating bath of copper ions (Cu2 +) put forward a replacement solution.