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Railway Fastener Composite Brake Shoe

Suzhou Zhongyue Railway Material Co.,Ltd.
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Suzhou Zhongyue Railway Material Co.,Ltd.
Province/State: Jiangsu
Country/Region: China

Railway Fastener Composite Brake Shoe

Brand Name : ZHONGYUE
Model Number : Brake Shoe
Certification : ISO9001:2008
Place of Origin : China
MOQ : 1000pcs
Price : negotiation
Supply Ability : 30,000pcs per month
Delivery Time : 10 working days after received your payment
Packaging Details : Plastic bags and wooden pallets or according to clients' requirement
Product Name : Brake Shoe
Application : Heavy Duty Truck.Train.Bus,Automobile,petroleum drilling machine
Type : According to customers’ drawings, for train or wagon
Material : Cast iron HT200, Composite material
Surface : Plain (oiled), Colored
Standard : Refer to standard GB/T 9439-1988
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Railway Fastener Composite Brake Shoe

Specifications:

Our cast iron brake block enjoys many advantages including hardness, impact strength and so on. It

consists of two parts, the cast iron and the steel support. Both the surface and core of the cast iron have

the hardness within the range of 197< HB< 255.


When facing subsequent impacts to the brake block or brake shoe, the steel support must remain intact

and attached to the iron places. The connection bridge may possibly become detached but should not

show any soundness defects. Separated from the brake shoe, the support must be able to withstand the

bend test with cracking or breaking.


Chemical compositions of cast iron
Carbon: 3.0-3.5%
Phosphorus: 1.3-1.5%
Silicon: 1.5-2.0%
Sulphur: 0.1-0.15%
Manganese: 0.5-0.8%

Chemical compositions of steel support
C % < 0.13%,
S % < 0.062%,
P % < 0.062%.


composite brake block


Function
Our composite brake block is an ideal replacement of the metallic (gray cast iron) brake block. Composite

brake block features motion to the wheel and well fitness between the brake block and brake block shoe

(brake holder).


Physical and mechanical properties of composite

Characteristic

Unit

Value

Testing Method

Specific Gravity

gr/cm3

1,7 – 2,4

ASTM D792

Coefficient of Friction


0,14 – 0,22

ASTM D1894

Hardness

HRR

70 – 105

ASTM D785

Crush Strength

N/cm2

Minimum 2500

ASTM D695

Bending Strength

N/cm2

2400 – 4000

ASTM D790

Tensile Strength

N/cm2

480 – 1500

ASTM D3039

Shear Strength

N/cm2

1500 - 3500

ASTM D732

Heat Resistance: 250ºC
Result: Does not melt and burn for continuous use.
≥ 400ºC
Result: May burn but does not cause the flame.

Operational heat
Our composite brake block won't melt or burn and continues to work at a temperature of 250℃
It may burn but causes no flame at a temperature of ≥ 400℃.

Materials
A. The materials of composite brake block consist of 3 main substances including reinforcing fiber,

organic/inorganic filler and resin bound.
B. It has a high level of uniformity.
C. It can be separated from the backing plate.
D. It contains no asbestos, lead, zinc or other mixtures.
E. It also contains no toxic materials.
F. The hardness of the material is lower than the wheel's.
G. It causes no strong smell in friction.

Backing plate
Backing plate for a trains' composite brake block must meet the following criteria. Firstly, it is made of

ST-41 steel plate, and is constructed to transmit the braking force to the composite material. Secondly,

there should be a binding structure between the composite material and backing plate, thus forming

into a integrated unit and ensuring sufficient bending strength and stiffness.

Performance
A. Excessive wear won't be caused on the surface of the wheel and the composite brake block.
B. The composite brake block will not cause the wheel porous or cracked.
C. It won't stick at the wheel during braking therefore won't cause uneven wheel surface.
D. It won't cause wheel slipping during full braking in wet conditions.

Test procedure
A. Vernier caliper or other methods are used to test the dimension of the brake block.
B. Laboratory test
Specific gravity test: standard ASTM D 792 or equivalent method
Coefficient of friction test: Standard ASTM D 1894 or equivalent method
Hardness test: standard ASTM D 785 or equivalent method
Shear resistance test: standard ASTM D 732 or equivalent method
Press test: Standard ASTM D 695 or equivalent method
Bending test: Standard ASTM D 790 or equivalent method
Thermal properties test: standard ASTM D 177 or equivalent method




Product Tags:

composite brake block

      

railway brake shoe

      
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