SU1025750A1 - Cast iron - Google Patents

Abstract

CAST IRON containing carbon, silicon, manganese, chromium, nickel, vanadium, nitrogen and iron, characterized in that, in order to increase strength, heat resistance and resistance to the formation of cracks in the casting, it additionally contains copper, molyb) aen and calcium at the following ratio components weight. %: 2.7-3.9 Carbon 0.35-2.0 Silicon, 2 Manganese. Chromium O, O5-2, O 0.05-3.6 Nickel Vanadium O, OZ-0.5 0, O05- O, 035 Nitrogen "Copper 0.02-2.0 Molybdenum O, O1-O, 6 0, OO01-0, O1 Calcium Rest Iron

Description

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SP

The invention relates to metallurgy and moque steel to be used for casting large diameter cast iron rolls.

The material is known for your wa0.kov flj g of the following chemical composition, weight ..%:

Carbon1.0-3.5

. Silicon0,2-0,6

MarganenO, 8

Chrome 11- L9

Molybdenum 0.1-1.0

Vanadium0,2-0,8

Nitro0.95-0.3

 CeriO, OB-0.3

The alloy has sufficient strength and hardness, but when it comes to mass castings, it is unsuitable because of its high stability against cracking in the casting.

The closest to the proposed technical essence and the achieved effect is., 2, contained, weight. %:

Uperod2.8-3.8

Kremshy0,35-2,0

Manganese 0.20-1.2

Chromium, 0.56-2.5

Nickel 0.80-3.6

Vanadium 0.08-0.15

Nitrogen: 0.015-0.04

Iron Else,

Cast iron is characterized by increased hardness and wear resistance, however, it is not strong enough and is not resistant to resist the formation of a high-angle grid on the working surface of the rolls.

The purpose of the invention is to increase the strength, heat resistance and resistance to cracking in castings.

The goal is achieved by the fact that nyi-YH containing carbon, silicon, manganese, chromium, w-psea, vanadium nitrogen and iron, additionally copper, molybdenum, and calysus at cl, the ratio KoivmoHeJTDD, weight. %:

Carbon 2.7-3.9

Silicon0.35-2.0

Manganek0.20-1.2

Chrome 0.05-2, about

Nickel0.05-3.6

Vanadium, OZ-0.5

Nitrogen, OO5-0, O35.

Copper0.02-2.0

Pray, bdev0,01-0,6

KaldiOO, OOO1-1,01

IronSupply

Chemical coagulation and properties of cast iron in the gabli.ts.

510257506

The higher thermal resistance of the iron that is allowed does not change as compared to

It makes use of the proposed cast iron known. The economic effect of

for casting rolled rollers, working rolls made according to

quietly in the universal cages of rolling the invention instead of the known, will be

Mills, Technology offerings - 1279, 1 thousand rubles per year.

Claims (1)

No. 428031, class C 22 C 37/00, 1974. (54) (57) CAST IRON containing carbon, silicon, manganese, chromium, nickel, van di, nitrogen and iron, oh t l and h a y sh shy- with I heme that, in order to improve heat resistance and resistance cracking in cast, he db fully contains copper molybdenum and cal FD at the following ratio of comp Nengs, weight. %: Carbon 2.7-3.9 Silicon . 0.35-2.0 Manganese 00.2-1.2 . Chromium 0.05 L, O Nickel 0.05-3.6 Vanadium 0.03-0.5 Nitrogen 0.005-0.035 S Copper 0.02-2.0 1 Molybdenum 0.01-0.6 If Calcium 0.0001-0.01 C Iron Rest •at