SU852957A1 - Steel - Google Patents

Description

one

The invention relates to the field of metallurgy and can be used, for example, in the manufacture of cold rolled automotive sheet.

Known steel containing components, wt. %:

Carbon over 0.06

Manganese 0.20-0.25

Silicon more than 0.01

Aluminum 0.02-0.07

Iron Else 1

The disadvantage of this steel is low strength characteristics and low resistance to atmospheric corrosion. The weight loss of steel samples of 08U as a result of atmospheric corrosion is 2.1 g / m day.

Closest

proposed by

to the achieved eftehnicheskogo essence

and

The effect is steel containing components, wt. %:

Carbon

0.06-0.12

Silicon 0,008-0,16

Manganese

1 - 1.7

Chromium

0.08-0.15

Nickel

0.08-0.15

Copper

0.08-0.28

Titanium

0.001-0.006

Aluminum

0.001-0.006 Calcium 0.001-0.01 0.003-0.006 Oxygen Nitrogen 0.003-0.006 Remaining 2. Iron This steel has a low resistance to deformation aging and corrosion resistance.

The aim of the invention is to increase 10 resistance to deformation aging and corrosion resistance.

This is achieved by the fact that steel containing carbon, manganese, nickel, chromium, copper, titanium, aluminum, calcium and iron 15 contains components in the following ratio, wt. %:

Carbon0.02-0.11

Manganese 0.65-1.6

Silicon0,1-1,6

20Nickel0.03-0.80

Chrome 0.03-0.80

Copper0.03-0.60

Titanium0.005-0.15

Aluminum0.01-0.15

25Calcium0.001-0.025

IronErest

The steel was smelted in a 50 kg induction furnace. The ingots were first hot forged and then hot rolled to 5.5 mm thick workpieces. After heating the blanks to a temperature of 1250 ° C, the metal was rolled onto a sheet 2.5 mm thick. Then, cold irokatkoy received sheets with a thickness of 0.8 mm. Annealing of the sheets was carried out at a temperature of 700 ° C for 2 hours. The rate of heating the sheets to the annealing temperature and cooling after annealing was 50 ° C / h. The chemical composition and test results of rolled experimental and comparative heats are given in table. 1 and 2.

Table 1

table 2

Claims (1)

Claim Steel containing carbon, manganese, silicon, nickel, chromium, copper, titanium, aluminum, calcium and iron, characterized in that, in order to increase resistance to deformation aging and corrosion resistance, it contains components in the following ratio, weight. %: Carbon 0.02-0.11 Manganese 0.65-1.6 Silicon 0.1-1.6 10 Nickel 0.03-0.80 Chromium 0.03-0.80 Copper 0.03-0.60 Titanium 0.005-0.15 Aluminum 0.01-0.15 fifteen Calcium 0.001-0.025 Iron Rest