SU503930A1 - Cast iron - Google Patents

Description

one

The invention relates to metallurgy, in particular, to the search for special foundry cast irons, e tt.IX for parts, for example gears, worms, bearing shells, etc.

Of the natural cast iron, the following chemical composition, Bec.% I:

2.8-3.6 2.0-3.2 0.5-1.2 0.3-1.2 0.3-1.2 0.02-0.07

0.005-0.1

Calcium Rare-earth 0, 005-0,15 metals 0.1-0.6 Molybdenum Chromium 0.07-0.5 0.01-0.8 Barium the rest Iron As cast iron, impregnated iron contains (0.01-0.1 wt.%) and sulfur (0, O01o, 02 wt.%).

The properties of cast iron after normalization and isothermal hardening are given in .table. one.

Table 1.

The known cast iron has low plasticity, strength and wear resistance, which does not ensure the durability and reliability of machine parts operating in aggressive media, at high specific pressures and high speeds, accompanied by impacts.

The proposed cast iron, carbon, silicon, manganese, nickel, copper, magnesium, calcium, rare earth metals to iron, differs from the well-known fact that, in order to increase the strength, ductility, wear resistance, it additionally contains aluminum and lithium in the following ratio components

weight.%:

Carbon 2.6-3.6

ten

As impurities, pig iron sotsert phosphorus 0.03-1.1 wt.%, Sulfur O, 01-0.1 wt.%.

The mechanical properties of cast iron are given in tdbl. 2

Table 2.

The corrosion rate of the proposed cast iron in 1% sulfuric acid does not exceed 1 mm / year.

V

Claims (1)

Invention Formula Cast iron containing carbon, silicon, manganese, nickel, copper, magnesium, calcium, rare earth metals and iron, characterized in that in order to increase strength, ductility, wear resistance, it additionally contains I..I aluminum and lithium in the following ratio of components, wt.%: Carbon 2.6-3.6 Silicon0.1-2.2 Manganese 0.2-2-2.0 Nickel0.05-2.0 Copper1, O-8.0 Magnesium0.01-0.03 Calcium0.001-0.1 Rare Earth Metals0.001-0.05 Aluminum0.2-4.0 Lithium0.001-0.01 L-iron