This metallurgical inspection was carried out because this wheel has been broken in a very short time, just a couple of working shifts after beeing installed. A material failure has been revealed during metallurgical inspection. The material of wrong wheel contains very big quantity of sulfur in small balls spotted all over evenly.

Broken Wheel
Broken Wheel

Broken Wheel

Broken Wheel
Broken Wheel

Broken Wheel

Broken Wheel
Broken Wheel

Broken Wheel

Broken Wheel
Broken Wheel

Broken Wheel

Material of Good Wheel 50x
Material of Good Wheel 50x

Material of Good Wheel 50x

Material of Good Wheel  500x
Material of Good Wheel 500x

Material of Good Wheel 500x

Material of Wrong Wheel 500x
Material of Wrong Wheel 500x

Material of Wrong Wheel 500x

Material of Wrong Wheel  1000x
Material of Wrong Wheel 1000x

Material of Wrong Wheel 1000x