A bicycle disc brake rotor basically has an outer portion, an inner portion and an intermediate portion. The outer portion is made of a first material. The inner portion is made of the first material. The intermediate portion is disposed between the outer portion and the inner portion. The intermedi
A bicycle disc brake rotor basically has an outer portion, an inner portion and an intermediate portion. The outer portion is made of a first material. The inner portion is made of the first material. The intermediate portion is disposed between the outer portion and the inner portion. The intermediate portion is made of the first material. The intermediate portion is at least partially laminated by a layer made of a second material. The second material is different from the first material. The layer has a contour tracing a contour of the intermediate portion.
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1. A bicycle disc brake rotor comprising: an outer portion made of a first material, and including at least one recess formed in at least one of a pair of friction braking surfaces formed by the outer portion;an inner portion made of the first material; andan intermediate portion disposed between th
1. A bicycle disc brake rotor comprising: an outer portion made of a first material, and including at least one recess formed in at least one of a pair of friction braking surfaces formed by the outer portion;an inner portion made of the first material; andan intermediate portion disposed between the outer portion and the inner portion, the intermediate portion being made of the first material;the intermediate portion being at least partially laminated by a layer made of a second material, the second material being different front the first material, the layer extending from the at least one recess and having a contour tracing a contour of the intermediate portion. 2. The bicycle disc brake rotor according to claim 1, wherein the layer includes a thermally sprayed layer provided by a thermally spray on the intermediate portion. 3. The bicycle disc brake rotor according to claim 1, wherein the layer is recessed within the at least one recess with respect to the at least one of the friction braking surfaces that includes the at least one recess. 4. The bicycle disc brake rotor according to claim 2, wherein the layer extends along opposite axial faces of the intermediate portion. 5. The bicycle disc brake rotor according to claim 2, wherein the outer portion includes at least one recess formed in each one of a pair of friction braking surface formed by oppositely facing sides of the outer portion, the recesses including the layer disposed therein. 6. The bicycle disc brake rotor according to claim 5, wherein the layer is recessed within the recesses with respect to a corresponding one of the friction braking surfaces that includes a corresponding one of the recesses. 7. The bicycle disc brake rotor according to claim 2, wherein the contour of the intermediate portion includes a recess with the layer disposed therein. 8. The bicycle disc brake rotor according to claim 2, wherein the intermediate portion includes a plurality of connecting arms, and the layer extends along at least one axial face of at least one of the connecting arms. 9. The bicycle disc brake rotor according to claim 8, wherein the layer extends along the at least one axial face of all of the connecting arms. 10. The bicycle disc brake rotor according to claim 8, wherein the at least one of the connecting arms includes a recess with the layer disposed therein. 11. The bicycle disc brake rotor according to claim 1, wherein the layer is a copper layer that is bonded to the at least one of the intermediate portion by a cold spraying process. 12. The bicycle disc brake rotor according to claim 1, wherein the outer portion and the intermediate portion are integrally formed as a one-piece member of the first material. 13. The bicycle disc brake rotor according to claim 12, wherein the inner portion is a separate member that is fixed to the inner end of the intermediate portion. 14. The bicycle disc brake rotor according to claim 1, wherein the outer portion, the intermediate portion and the inner portion are integrally formed as a one-piece member of the first material. 15. The bicycle disc brake rotor according to claim 1, wherein the intermediate portion has opposite axial faces that are each completely laminated by the layer of the second material. 16. The bicycle disc brake rotor according to claim 1, wherein the intermediate portion includes an annular disc that extends between the outer portion and the inner portion, and the layer of the second material extends along at least one axial face of the annular disc. 17. The bicycle disc brake rotor according to claim 1, wherein the intermediate portion includes an annular disc that extends between the outer portion and the inner portion, and the layer of the second material extends along both opposite axial faces of the annular disc. 18. The bicycle disc brake rotor according to claim 1, wherein the intermediate portion includes at least one cooling projection that is covered by the layer of the second material. 19. A bicycle disc brake rotor comprising: an outer portion made of a first material, the outer portion including at least one recess formed in at least one of a pair of friction braking surface formed by the outer portion;an inner portion made of the first material; andan intermediate portion disposed between the outer portion and the inner portion, the intermediate portion being made of the first material, the intermediate portion being at least partially laminated by a copper layer, the copper layer being a different material than the first material, the copper layer having a contour tracing a contour of the intermediate portion,the copper layer being provided by a thermally spray process, and extending from the at least one recess. 20. The bicycle disc brake rotor according to claim 19, wherein the copper layer is provided to the intermediate portion.
Morgun Vladimir V. (Zaporozhie SUX) Lebedenko Sergei S. (Zaporozhie SUX) Kravchun Stepan I. (Zaporozhie SUX) Khupovka Viktor P. (Zaporozhie SUX) Boguslaev Vyacheslav A. (Zaporozhie SUX), Friction element of friction pair.
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