SU517266A3 - Cast iron - Google Patents

Description

(54) CAST IRON

one

The invention relates to the field of finding iron-based cast alloys, possessing high wear resistance, used to manufacture parts operating under high frictional loads that are hazardous from the standpoint of fire, such as shoe brakes.

Known chutut the following chemical composition, wt.%:

glerod 2.8-3.4

Silicon1.5-2.0

Manganese 0.3-0.5

Phosphorus less than 0.8

Iron. The rest

The proposed cast iron differs from the known high content of phosphorus, which prevents sparking during dry friction interaction of the braking system. Cast iron has the following chemical composition, wt.%:

Carbon2.8-3.41

Silicon1.5-2.0

Manganese 0.3-0.5

Phosphorus - 2.0-4.0

Iron. Rest

Cast iron has the following properties:

Tensile strength, kg / mm

14.6-15.3 Durability at splitting, kg / mm 25.2-30.1 Compressive strength, kg / mm 81.2-85.0 Brinell hardness, kg / mm

212-255 Static friction coefficient

(polished surfaces).

0.4 0.69 Static coefficient (damaged surface) The proposed cast iron does not pose a serious danger to the occurrence of a fire when used on railway locomotives, since friction creates a very small amount of sparks with a long path.

Claims (1)

Invention Formula Cast iron containing carbon, silicon, manganese, phosphorus and iron, characterized in that, in order to prevent sparking during a dry friction interaction of the braking system, its components are taken as follows, with respect to weight, in wt.%: Carbon2.8-3.4 Silicon1,5--2,0 Manganese 0.3-0.5 Phosphorus: 2.0-4.0 IronErest