Composite material
AssigneeKolon Industries, Inc.
InventorsGeun Sang Cho, Choongnyun Paul Kim, Kwan Min Choi
Life of this patent
Estimating the term…
Abstract
A brake body according to the present disclosure has a coating layer which contains an iron-based amorphous alloy and is formed on a contact surface at which a friction means rubs against the brake body to generate braking force which the brake body is rotated. The coating layer has a low friction coefficient and thus generates less dust during braking. The coating layer also has high corrosion resistance and wear resistance and may thus guarantee high performance and good price competitiveness when applied to a brake base material produced at low cost.
Claims13
A brake body for a brake device, the brake body comprising:
- a coupling part which is to be connected to a drive shaft;
- and
- a brake part comprising a rotor connected to an outer peripheral surface of the coupling part, and a coating layer provided on a surface of the rotor,
- wherein the coating layer comprises an amorphous alloy and has a thermal expansion coefficient 1.0 times to 1.4 times a thermal expansion coefficient of the rotor,
- wherein the amorphous alloy comprises:
- Fe;
- a first component comprising at least one selected from the group consisting of Cr, Mo, and Co;
- a second component comprising at one selected from the group consisting of B, C, Si, and Nb, and
- wherein the amorphous alloy includes the first component in an amount of 30 to 140 parts by weight and the second component in an amount of 4 to 20 parts by weight, based on 100 parts by weight of Fe included in the amorphous alloy.
A brake device for braking a machine which includes a drive shaft and is driven, the brake device comprising:
- a brake body that comprises a coupling part coupled to the drive shaft and rotated when driven, and a brake part connected to an outer peripheral surface of the coupling part;
- and
- a friction means that is displaced toward the brake body, brought into contact with the brake body, and contacted with the brake part for braking,
- wherein the brake part comprises a rotor connected to the coupling part and a coating layer provided on a surface of the rotor,
- wherein a thermal expansion coefficient of the coating layer is 1.0 times to 1.4 times a thermal expansion coefficient of the rotor, and the coating layer comprises an amorphous alloy,
- wherein the amorphous alloy comprises:
- Fe;
- a first component comprising at least one selected from the group consisting of Cr, Mo, and Co;
- and
- a second component comprising at least one selected from the group consisting of B, C, Si, and Nb, and
- wherein the amorphous alloy includes the first component in an amount of 30 to 140 parts by weight and the second component in an amount of 4 to 20 parts by weight based on 100 parts by weight of Fe included in the amorphous alloy.
Dependencies are inferred from the claim text.