Material for components of disk brake

FIELD: metallurgy.

SUBSTANCE: invention relates to structural powder metallurgy, particularly to powder frictional material. It can be used for manufacturing of components of disk brakes, particularly, lining of disk brakes. Material contains, wt %: tin 1.8-3, iron 7-20, graphite 7-20, fused alumina 1.5-2, ferromolybdenum 0.5-2 and copper-the rest.

EFFECT: material provides high frictional thermal stability and strength of components of disk brakes, and also high wear resistance of lining of disk brakes.

1 ex

 

The invention relates to construction materials made by powder metallurgy of metallic and non-metallic powders and intended for the manufacture of disc brake parts, namely, pads disc brakes.

Pad disc brake has a steel base with pressed and pripojenym metal-ceramic friction layer. These pads are used for brake systems of machines, plants, including for installation on rolling stock of Railways and ensure the operation of disc brakes at maximum pressure up to 0.7 MPa (7.0 kg/cm), the sliding speed of not more than 50 m/s in conditions of dry friction with the brake disk.

Known friction plate, in which the friction material is used, a metal composition comprising (in weight%): the 40-50 copper, tin 3-9, iron 9-15, graphite 10-20, lead 3-10 and oxide 4-15. ("The friction pad with a metal layer of copper-based" - THAT 1479-002-49123292-2005).

When using the known pads on the surface of the disk brakes are marked local Navara of the friction material pads (navrachana"), having in its composition of solid constituents. Material transfer plates on the disk contributes significantly to the high temperature close to the temperature of the reservoir is economic strain, and the presence in the structure of the low-melting components.

Known material has a structure that consists of a mechanical mixture of metals (Cu, Fe, Sn) and graphite in a free state, and compounds based on them. The Brinell hardness of the cermet layer lining 40-60 HB.

The technical result that can be obtained from the use of the invention is to increase frictional heat resistance and strength of the disc brake parts, as well as increasing the wear pads of the disk brake.

Material based on copper, according to the invention provides high frictional resistance and strength of the disc brake parts, contains (in weight%): tin 1,8-3, iron 7-20, graphite 7-20%, the oxide of 1.5-2, ferromolybdenum 0.5 to 2 and the copper - rest.

The proposed structure is different from the known material that further comprises ferromolybdenum.

Example of receipt.

Material intended for the manufacture of linings disc brakes, made by powder metallurgy of metallic and non-metallic powders, such as: copper, tin, iron, graphite, abrasive powder of oxide and ferromolybdenum. The plate is a steel base with pressed and pripojenym metal-ceramic friction layer (wt.%):

Cu - 77,5; Sn - 2,5; Fe - 6,0; - 11,0; Al2O 3- 1,5; FeMo - 1,5.

The resulting material provides high frictional resistance and strength of the disc brake parts:

- Brinell hardness cermet
ply lining15-50 NV
- the maximum permissible specific pressure
on the cermet layerup to 6 MPa (60 kg/cm2)
- maximum allowable sliding speedup to 50 m/s
- coefficient of friction depending on speed0,28-0,45
- working area of the two plates is not less than342 cm2

The data presented show that the proposed composition of the material provides a high frictional resistance, durability disc brake parts, as well as increased wear and strength characteristics of overlays.

Material for disc brake parts containing copper, tin, iron, graphite, aluminium oxide, characterized in that it additionally contains what it ferromolybdenum in the following ratio of components, wt.%:

tin1,8-3
iron7-20
graphite7-20
oxide1,5-2
ferromolybdenum0,5-2
copperrest



 

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1 tbl

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9 cl, 3 tbl, 1 ex

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