Molten salt composition for use in manufacturing laminated rings
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsHitoshi Imai, Katsuyuki Nakajima
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Abstract
A laminated ring for use as a belt in transmitting power in a continuously variable transmission is produced by welding opposite ends of a sheet of maraging steel to produce a plurality of rings, and rolling said rings to a predetermined length. The rings are nitrided in a salt-bath nitriding process by dipping the rings in a molten salt containing 38-46% of CNO− and 1-2% of CN− and heated to a temperature in the range from 480 to 530° C., for a period of time ranging from 10 to 25 minutes. The nitrided rings are finally stacked into a laminated ring.
Claims4
A molten salt composition for use in a process of salt-bath-nitriding a laminated ring for use as a belt in transmitting power in a continuously variable transmission, the laminated ring being produced by welding opposite ends of a sheet of maraging steel to produce a plurality of rings, rolling said rings to a predetermined length, and stacking the rings, said molten salt comprising 3-4 wt % of a cyanide, 89-91 wt % of a cyanate, and the remainder wt % of a carbonate, and
- heated to a temperature in the range from 480 to 530° C. in the process of salt-bath-nitriding the ring for a period of time ranging from 10 to 25 minutes so that a nitride layer formed in a surface of each of the rings has a thickness ranging from 20 to 40%.
Dependencies are inferred from the claim text.