Specifications
Train and Wagon Cast Iron Brake Block | |
According to customers` drawings, for train or wagon | |
Heavy Duty Truck.Train.Bus,Automobile,petroleum drilling machine. | |
Cast iron HT200 |
Composite material |
Refer to standard GB/T 9439-1988 |
1.rail way composite Brake shoe Material: Composite material, high friction composite brake shoe, low friction composite brake shoe 2.Advantage: --Composite friction material bearing high energy braking; --High coefficient of friction and stability, --small heat fade for coefficient of friction, --Temperature insensitiveness, --Develop according to the samples or drawings --Certification:ISO9001-2000 |
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4. The HGM - A high friction composition brake shoe steel back and friction body two parts.
Brake shoe shape size (mm) :
(1) the steel back of outer arc: R450
(2) brake shoe width: 820-1
(3) the thickness of the brake shoe: 45
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5. The steel back is made of Q235A steel manufacturing, steel plate performance shall comply with the provisions of GB/T700.
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6. Brake shoe is made up of steel back and friction.Friction main raw material for: phenolic resin, nitrile rubber, steel fiber,
reduced iron powder, graphite, etc.
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7. The friction performance component of the learning performance and friction wear performance of two parts.
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The mechanical properties shall comply with:
Table 1 physical and mechanical performance of the brake shoe
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Unit performance indicators
G/cm3 density less than nominal worth plus or minus 5%
The compression strength of 25 Mpa or greater
The impact strength acuity 2.0 kJ/m2
The compression modulus of Mpa to 1.3 * 103 or less
Rockwell hardness (HRR) 90 or less
Water absorption percentage < 1.5%
Oil absorption percentage < 1.5%
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Brake friction wear performance should be consistent with:
Table 2.The change of the instantaneous friction coefficient range (20 kn brake shoe pressure)
Speed (km/h) 0 10 20 30 to 40 50 to 60
The maximum 0.63 0.602 0.558 0.546 0.515 0.482 0.471
Standard 0.48 0.46 0.43 0.42 0.39 0.37 0.36
The minimum 0.42 0.40 0.40 0.36 0.33 0.32 0.37
Christmas Stockings/ Santa Sacks
Christmas Stockings, Santa Sacks,Personalized Christmas Stockings,Custom Christmas Stockings,Embroidered Christmas Stockings
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