SU1027269A1 - Steel - Google Patents

Description

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The invention relates to metallurgy and can be applied} for the production of critical castings with high strength, wear resistance and resistance to brittle fracture at low temperatures,

known steel 11, containing, wt.%:

Carbon 0.12-0.25

Manganese 0.7-1.6

Silicon 0.3-0.7

Chrom0.2-0.35

Vanadium 0.04-0.20

Titanium 0,015-0,04

Copper 0.15-0.45

Nickel 0.15-0.45

Alc 4ini 0,015-a, 08

Iron Else

This steel has low strength and weldability.

Closest to the proposed technical essence and the achieved effect is steel 12, containing, wt.%:

Carbon 0.12-0.22

Manganese 1.2-2.0

Silicon 0.2-0.6

Vanadium 0.05-0.15 Chemical Compositions Si I Cr V Mn-Si Cr V

Nitrogen 0,01-0,03 i Alukshny 0,002-0,050

Copper 0.01-0.5

Calcium 0,005-0,05 Iron Rest

Known steel has insufficient wear resistance and weldable

The aim of the invention is to reduce wear resistance and improve the weldability of steel.

The goal is achieved by the fact that the steel containing carbon manganese, silicon, vanadium, copper, aluminum, nitrogen and iron, additionally contains chromium at the next ratio of the components, wt%:

0.06-0.25

Carbon 0.7-1.6

Manganese 0.2-0.7

Silicon 0.21-0.50

Vanadium 0.01-0.07

ALUMINUM 0.05-0.50

Copper 0.004-0.020

Nitrogen 0.05-0.7.

Chrome Rest

Iron

Chemical, composition and physico-mechanical properties of the proposed steel are presented in Table. 1 and 2.

The table of proposed steel,% ... :: .... 1.:. Si I A

The mechanical properties of the proposed steel

18 D

641

30.3

503

30.5

581 433

50.8

1.03

0.53

0.32

-eight

.-1.1S

14.4

1.02

-25

628,494

33.4

19.2

591 445

49.4

29.8

43.8

613 462

28.3 Results of testing of the proposed 20 and known steels for wear after

The test results of samples of the optimal composition of the proposed and

I 750 A

and 30 V

-. Continuation of the table. 2

The mechanical properties of the proposed steel

-ten

1.12

0.58

0.39

-18

1.28

1.25

8.3

-15

1.09

0.73

1.21

known steels are presented in table. four

Table 4

0.85

0.73

0.47 normalization from are presented in table. 3.Table3

Vp, 47.5 m / h

L p- "/ h

Depth Pro

  . . , . 5: VtH,

Known Q "5.5 kcal / cm

I 720 ft

35 V

V 32 m / h

: VV;

av: 83 m / h

Propelled Depth

-7№ ":. . .

. Mechanical properties of welded joints from comparative steel steels

0.68

0.96

1.00

0.45

0.70

0.84

0.75

0.98

1.10

optimal compositions are given in table. five.

9 102726910

As can be seen from the presented. Application of the proposed steel

data, the proposed steel with high-will significantly. increase the level of mechanical properties of reliability and durability

has a higher wear resistance of cast cars (bogie frames and beams

and better weldability than west and automatic couplings). .

on . Welded joints from Proposal-5

EMERI steel has a higher pro-economic effect of penetration and impact strength than that of the proposed steel will be

well-known. million rubles in year.

Claims (2)

STEEL containing carbon, manganese, silicon, vanadium, copper, aluminum, nitrogen and iron, which is due to the fact that, in order to increase wear resistance and improve weldability, it additionally contains chromium with the following wearing components, weight%: Carbon Manganese Silicon Vanadium Aluminum Copper. Nitrogen Chromium Iron 0.06-0.25 0.7-1.6 0.2-0.7 0.21-0.50 0.01-0.07 0.05-0.50 0,004-0,020 0.05-0.7 Rest 60 • m Yu with one 1027269 2