Coil Spring Bolster Bogie Suspension Spring Bogie Damper Device 60Si2CrVAT

Category： Bogie Parts
Application: Spring for bolster damper
Material options: 60Si2CrVAT/60Si2CrVA/50CrV4/ SUP 9
Production process: rolling
Standard: AAR, EN, TB
INQUIRY EMAIL

Coil Spring Bolster Bogie Suspension Spring Bogie Damper Device 60Si2CrVAT

1. Brief introduction:

As the core component of railway freight car bogies, the bolster spring absorbs wheel rail vibration impact through vertical elastic deformation and undertakes the function of vehicle load transmission. Its structure often adopts a combination of double coil circular springs, and millimeter level precision detection and sorting are achieved through an intelligent selection system.

2. The two main functions of bolster springs are:

When the locomotive and vehicle pass through the uneven line or vibration and impact occur due to wheel set defects, it can alleviate the impact and attenuate the vibration;
Make the weight distribution between the wheel sets of the same bogie appropriate, so that the wheel load of each wheel set will not vary too much under various line conditions.

3. Main features of bolster springs:

Materials	60Si2CrVAT/60Si2CrVA/50CrV4/ SUP 9
Standard	AAR, EN, or TB standards
Manufacture process	Rolling
Spring types	Inner Spring, Outer Spring, Wedge Spring
Application	Spring for railway freight cars, passenger cars, locomotive cars

4. Chemical composition of spring materials:

Material	C	Si	Mn	S	P	Cr	Ni	Cu	V
60Si2CrVAT	0.56～0.64	1.40～1.80	0.40～0.70	≤0.020	≤0.020	0.90～1.20	≤0.35	≤0.20	0.10～0.20
60Si2CrVA	0.56～0.64	1.40～1.80	0.40～0.70	≤0.030	≤0.030	0.90～1.20	≤0.35	≤0.25	0.10～0.20
50CrV4	0.46～0.54	0.17～0.37	0.50～0.80	≤0.030	≤0.030	0.80～1.10	≤0.35	≤0.25	0.10～0.20
SUP 9		0.17～0.37		≤0.030		0.65～0.95	≤0.35	≤0.25	0.10～0.20

5. Mechanical properties of spring materials:

Material	Tensile strength σb (MPa)	Yield strength σs (MPa)	Elongation δ5 (%)	Reduction of area ψ (%)
60Si2CrVAT	≥1665	≥1860	≥8	≥20
60Si2CrVA	≥1862(190)	≥1666(170)	≥6	≥20
50CrV4	≥1274(130)	≥1127(115)	≥10	≥40
SUP 9	≥1225(125)	≥1080(110)	≥9	≥20