SU850719A1 - Cast iron - Google Patents

Description

The invention relates to chemistry, in particular to the search for new ones operating under conditions of abrasive wear. Known cast iron 13, following the composition, weight,%; 2.5-3.2 Carbon Up to 0.8 Silicon 2-4 Manganese 12-18 0.5-1.5 Molybdenum 0.1-0.5 Up to 0.1 Up to 0.1 Phosphorus IronOther The disadvantage of this is found in the fact that it contains the component molybdenum, which is closest to the proposed essence and the dumm effect is of the Ducca composition, wt.%: 2.7-3.5 Carbon 0.4-1.4 Silicon 0, 4-1.4 Map Ghanaian 18.5-23., 0 0.2-2.0 0.01-0.1 Zirconium Rest Iron Deficiency. The specified cast iron is enclosed in low hardenability of the wear resistance of castings with a thickness in excess of 100 mm. The purpose of the invention is to increase the hardenability and wear resistance after quenching castings with a thickness of more than 100 mm. The goal is achieved by the fact that the proposed cast iron containing carbon, chromium, manganese, silicon, zirconium, additionally contains boron in the following ratio of components, wt.%: Carbon2.4-3.5 Silicon0.4-1.4 Manganese3,2- 5.0 Chromium 16.0-24.0 Zirconium 0.05-0.1 Bor0.05-0.2 S Ferrous Others From the proposed cast iron, it is possible to harden in plate air with dimensions 350x400x1400 mm, while the cast iron has high hardness and wear resistance. Example. The cast iron is melted in an ICT-0.16 induction furnace. Hardenability is determined by thermal modeling, and wear resistance by cup grinding.

The coefficient of relative durability, determined by the formula

.V .et.Iobr.

.. bt

fc-de b et, yC, JT. Model L et Cobra. Respectively, loss of volume, mass and specific gravity of the standard and the test sample.

As a reference, normalized steel 20 is used, for which K is taken equal to 1.

Table 1 shows the compositions of the known and proposed cast iron. In tab. 2 presents the results of determining the hardenability of the proposed n known chu5 guna.

When, the recorded data show that the wear resistance of the proposed cast iron in castings of 350x o x1400x1400 mm is more than 2 times greater than the known, on hardenability it also significantly exceeds the known one.

Table 1

Famous;

Table 585071 of the invention. Cast iron containing carbon, silicon-III, manganese, chromium, zirconium, but eso, characterized in that. that, in order to improve the hardenable, wear resistance after quenching of castings with a thickness of 100 mm, it additionally contains boron in the ratio of components, wt.%: .10 Carbon 2.4-3.5 K remiy 0.4-1.4 96 Manganese 3.2-5.0 Chromium 16.0-24.0 Zirconium 0.05-0.1 Boron 0.05-0.2 Iron Else Sources of information taken into account during the examination of the USSR Copyright Certificate 292682, cl. C 22 C 37/00, 1971. USSR Copyright Certificate No. 2616036/02, cl. From 22 to 37/06, 1978.

Claims (1)

Claim Cast iron containing carbon, silicon, manganese, chromium, zirconium, iron, characterized in that, in order to increase the hardenability of wear resistance after quenching of castings with a thickness of 100 mm, it additionally contains boron in the following ratio of components, wt.%: Carbon 2.4-3.5 Silicon 0.4-1.4 Manganese 3.2-5.0 Chromium 16.0-24.0 Zirconium 0.05-0.1 Boron 0.05-0, 2 Iron Rest