SU1357458A1 - Steel - Google Patents

Abstract

The invention relates to the field of ferrous metallurgy and mechanical engineering and can be used in the manufacture of wear-resistant material for cast parts operating under conditions of contact dynamic loading with an abrasive effect, for example track tracks. The purpose of the invention is to increase durability under cyclic contact impact loading and impact abrasive wear and impact toughness at lower temperatures. This is achieved by the addition of chromium and antimony to the alloy. Steel contains components in the following ratio, wt.%: Carbon 1,19-1,43; manganese 8.25-11.00; chromium 0,, 10; silicon 0.2-0.8; vanadium 0.01-0.08; sulfur 0.01-0.05; phosphorus 0.02-0.12; antimony 0.001-0.008; iron is the rest, and the ratio of the basic alloying elements must satisfy the Formula (% Mn-10, 25) + (10 x% C- 13.9) 4. Impact viscosity at –40 s 1.6–1.7 MJ / m; abrasive wear resistance 1.3-1.7 rel. units, impact-abrasive wear resistance f, 1.2-1.35 rel. units The coefficient of segregation Mp 1,03-1,08 rel. 2 tab. with to (L has eaten .4 ate 00

Description

one

The invention relates to ferrous metallurgy and mechanical engineering and can be used in the manufacture of wear-resistant material for cast parts operating under conditions of tact-dynamic loading with an abrasive effect, such as track machines, an excavator bucket tooth, and the like.

The purpose of the invention is to increase durability under cyclic contact-impact loading and impact-abrasive wear and impact strength at lower temperatures. Example The melting of the proposed steel is carried out in an open induction 50 kg furnace and poured into ingots weighing 10 kg. The chemical composition of the known and proposed steel is given in table. one.

Samples are cut out of the ingots for impact strength tests and abrasive and impact abrasive wear. The relative wear resistance is estimated from the mass loss of the samples during the test. The structure of the samples of all steels after quenching from 1100 ° C into the water is pure auste-

Itna. Austenite grain size Art. 1- to lower temperatures, it will add 2-3 points. Art. 9 1 point. The hardness of steels in the hardened state of 20 - 25 HEC.

The test results for abrasive and impact-abrasive wear resistance, impact strength and manganese liquation coefficient in castings are given in Table. 2

The test results (Table 2) show that the proposed steels have toughness values at a low temperature (-40 s) sufficient for the parts to be able to

35

40

contains chromium and antimony in the following ratio, wt.%

Carbon1,19-1,43

Manganese8.25-11.00

Chrom0.4-1.10

Silicon 0.2-0.8

Vanadium 0.01-0.08

Sulfur0.01-0.05

Phosphorus 0.02-0.12

Antimony .0.001-0.008

IronErest

at the same time (% of manganese - 10.25) + + (10% carbon - 13.9) 4.

Known

one

Offered 2

1.02 9.25 - 0.62 0.050 0.05 0.10 88, 9100 14.69

1.39 10.25 0.40 0.20 0.080 0.01 0.02 0.0080 87.6420 About 1.43 11.00 1.1Q 0.80 0.050 0.05 0.05 0.0010 85, 5190 0.7225

ten

57458 - 2

It is necessary to work in harsh operating conditions, and at the same time it is 1.2-1.35 times better known for abrasive and impact-abrasive wear resistance. Known steel has unsatisfactory toughness at low temperatures (1.6 times lower than required) and low wear resistance. The degree of manganese segregation in economically doped steels x is lower (and in steels x with antimony is even lower) than in steel 110G13L (basic) and the structure of these steels is more finely grained, i.e. the quality of the cast steel offered

while maintaining the standard technology is higher than the base.

Thus, the proposed steel, being economically alloyed manganese

2Q cement, has high performance properties.

Claims (1)

Invention Steel made of carbon, manganese, silicon, vanadium, sulfur, phosphorus, iron, characterized by 25 in order to increase durability under cyclic contact-impact loading and impact-abrasive wear and impact toughness with five 0 contains chromium and antimony in the following ratio, wt.% Carbon1,19-1,43 Manganese8.25-11.00 Chrom0.4-1.10 Silicon 0.2-0.8 Vanadium 0.01-0.08 Sulfur0.01-0.05 Phosphorus 0.02-0.12 Antimony .0.001-0.008 IronErest at the same time (% of manganese - 10.25) + + (10% carbon - 13.9) 4. Table 1 88,9100 14,69 4 5 1.19 10.25 1.00 0.70 0.01 0.04 0.05 0.0070 86.7530 4 1.39 8.25 0.90 0.73 0.060 0.04 0.12 0.0070 88, 5030 4 Known 1 Offered 0.50 Compiled by I. Nikishkina Editor N. Rogulich Tehred M. Khodanych Proofreader A. Obruchar 5972/25 Circulation 605 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Continuation of table 1 table 2 1.00 1.08 1.18