SU729274A1 - Non-ageing steel - Google Patents

Description

one

The invention relates to the field of metallurgy, in particular to the production of steel intended for the manufacture, for example, hay wire, and can be used in the creation of high-performance hay balers for tying hay bales.

Closest to the proposed steel by its technical essence and the achieved result is non-aging steel L-Q containing, wt.%:

Carbon

0.02-0.05

Manganese

0.1-0.2

Silicon 0, O1-0, O5

Sulfur 0.01-0.015

Phosphorus 0, O08-0, O15

Nitrogen 0,003-0,005

Oxygen OO5-O, OO8

Aluminum

0.08-0.16

Iron Else

As

 steel nickel, copper, molybzhet contain

den and chrome in the amount of not more than O, 01-O, 25 wt.%.

The aim of the invention is to reduce the tendency to aging and plastic properties during hot rolling.

This is due to the fact that non-aging steel, containing carbon,, silicon, chromium, nickel, copper, aluminum and iron, contains components in the following ratio, wt%:

Carbon, 03-O, O7

Manganese 0.24-0.45

Silicon0, O1-0, O4

Chrome, 01-O, 06

Nickel0.04-0.10

Copper, O5-O, 15

Aluminum, O, O8-O, 1b

IronErest

As impurities, steel may contain, Bes.%:

SeruO, О1О-О, 02б

Phosphorus 0,010-0,020

0, OOZ-O, O10

Nitrogen 0, OO5-O, O15 Oxygen

Steel is poured through a glass with a hole diameter of 60 mm into the ingot molds extended downwards into ingots weighing 8 kgf. At the end of the mold filling (300 mm before the final level of pouring), primary granular aluminum in the amount of 2.5 kg / g of steel is introduced under the steel stream. After the ingot mold is filled, the ingot mirror is warmed with asbestos in the amount of 1.5 kg / ton of steel.

292744

The rolling of metal in the crimping, rolling mill and steel rolling mill is carried out according to known technology.

5 The chemical composition of the proposed and famous steel is presented in table. one; physico-mechanical properties - in table. 2,

At the same time, the proposed steel has a tensile strength of 30-45 kg / mm and an elongation of at least 10% at least 20%.

As can be seen from the data table. 2, the proposed steel has a higher resistance to aging, as well as high ductility at rolling temperatures. 15 Table

Claims (1)

Proposed OO.OZ O, 24 20, O5 0.35 30.07 0.45 Known0, OZ O, 20 0.014 0, O4 0.004 0.09 O, 01 Note. The formula of the invention of non-aging steel, containing genus, manganese, silicon, chromium, m aluminum and iron, is different 1a b l and c a 0,011 0, O4 0, OOZ O, 09 0, O1 O, O10 O, 01 O, 05 0,015 OST, 016 0.06 O, 07 0.12 O, 03 0, .016 O, 03 0.10 0, ОО7 The same 0.04 0.10 О, 010 0.16 0.04 0.020 О, О 0.15 О, 005 - Formation of defects, tearing and cracks on the rolled surface due to the low ductility of the metal at a temperature hot rolling 12OO-1300 C | Artificial aging is carried out at 100 ° C with an exposure for 2 hours and coal, aYO, 013 0.05 ODO 0, OO8-base so that, in order to reduce the tendency to aging and improve plastic properties during hot rolling , it contains components in the following ratio, weight,%: 5 O 3, 03-0, Q7 Manganese, 0.24-0.45 Silicon, 0.01-0.04 Chrome, 0.01-0.06 Nickel0, O4-0.1O Copper0, 05-0.15 729274. Aluminum 0.08-ODb L Else Sources of information. taken into account in the examination. s - USSR Author's Certificate No. 4898О9, cl. C 22 C 38/06, 1973.