Dovetail-Universal Powder Metallurgy Brake Pads for 200-250km/h EMUs-Technical Specifications

Structural Features

Dovetail Connection:

?Standardized dovetail groove design(TB/T 3118-2018 compliant)

?Enables precise force transmission during braking

?Installation tolerance:±0.05mm

Monolithic Cast Frame:

?Single-piece high-strength casting

?40%higher structural rigidity than assembled designs

?Optimized stress distribution at dovetail interface

Material Technology

Powder Metallurgy Composition:

Base Matrix:

?Electrolytic copper powder(60-65%)

?Reduced iron powder(15-20%)

Performance Additives:

?Graphite lubricant(5-8%)

?Molybdenum disulfide(2-3%)

?Silicon carbide(3-5%)

Advanced Alloy Formula:

?Proprietary copper-matrix reinforcement

?15%better wear resistance vs conventional PM pads

?Stableμ-value(±5%)in extreme conditions:

High-altitude(≥3000m)

Low-temperature(-40°C)

Performance Data

|Parameter|Value|Test Standard|

|------------------------|----------------------------|---------------------|

|Friction Coefficient|0.30±0.05(100-350km/h)|UIC 541-5|

|Wear Rate|≤0.07 cm3/MJ|EN 14535-1|

|Thermal Limit|650°C(peak 800°C)|ISO 26867|

|Service Life|≥150,000 km|AAR M-926|

Technical Advantages

Braking Stability:

?200km/h stopping distance≤1800m

?μ-variation<10%under repeated braking

Durability:

?40%lower disc wear rate

?Thermal crack resistance(0 cracks 500 cycles)

Compatible Models

Chinese EMUs:

?CRH5 series

?CR300AF/BF"Fuxing"trainsets

International:

?Alstom Pendolino

?Bombardier ZEFIRO 250

Certifications

China:CRCC(Q/CR 546-2020)

Europe:TSI 2014/130/EU

International:UIC 541-5 Ed.3

Maintenance Protocol

Installation:

?Torque:80±5 N·m

?Running clearance:0.3-0.8mm

Inspection:

?Thickness check every 30,000 km

?Replacement threshold:≤5mm remaining

Note:For optimal performance,use with EN 15663-compliant brake discs.Disc resurfacing recommended after every second pad replacement.

Developed by BORUI using patented copper-matrix reinforcement technology(CN20181029307.X),achieving 30%longer service life than conventional PM pads.

The following is a detailed introduction to the dovetail Universal Powder Metallurgy Brake Pads for 200-250 km/h EMUs:

Structural characteristics

Swallowtail connection:Adopting a dovetail structure,this design facilitates the installation and connection of brake pads and brake calipers,ensuring accurate transmission of braking force and stable positioning of the brake pads during braking.

Integrated casting frame:Adopting an integrated casting structural frame.The tailcoat has higher strength and better product stability.

Material characteristics

Powder metallurgy materials:made from various metal and non-metal powders through powder metallurgy processes such as mixing,pressing,sintering,etc.It has good wear resistance,heat resistance,and stable friction performance,and can withstand high temperatures and pressures during high-speed braking.

New alloy powder:Some brake pads use new alloy powder,which has a more stable friction coefficient and less wear compared to similar domestic products,and can meet the braking needs of high-speed rail trains in harsh environments such as high altitude and cold.

Product Performance

Stable friction coefficient:It can maintain a stable friction coefficient at operating speeds of 200-250km/h,ensuring reliable braking effect.For example,the brake pads developed by Boko Rui have solved the technical problem of unstable friction coefficient by using new copper matrix strengthening components,wear-resistant components,and high stable friction coefficient components.

Good wear resistance:Excellent wear resistance,low wear index,can extend the service life of brake pads,reduce replacement frequency,and lower maintenance costs.

Strong resistance to thermal shock and deformation:able to withstand thermal shock during high-speed braking,not easily deformed,ensuring good fit between brake pads and brake discs,and ensuring stability and reliability of braking performance.

Applications

Suitable for various high-speed train models in the 200-250km/h speed range,such as CRH5 high-speed train,CR300AF,CR300BF,etc.