SU985128A1 - Steel composition - Google Patents

Description

This invention relates to metallurgy, in particular to the search for spring steels.

Known spring steel 55 XGR, which is suitable for the manufacture of springs by the method of cold winding Cl.

The closest to the proposed technical sishis and effect achieved is steel f2 composition, wt.%:

Carbon 0.6-0.96 Silicon, 12-O, 35

Manganetsr, 6-O, 9

Chrome0., 17

TitanO, OOOZ-O, 15

BorO, 001-O, 004

IronErest

A disadvantage of the known steel is the relatively low hardenability and technological plasticity.

The purpose of the invention is to increase the hardenability and technological plasticity.

(54) STEEL

This goal is achieved by the fact that steel containing -carbon, manganese, silicon, chromium, boron, iron, additionally contains aluminum and nitrogen in the following ratio of components, wt.%:

Carbon

0,6-O, 76

Manganese OD-1,3

Silicon 0.01-3 O, 01-1.2

Chromium

ten

Aluminum 0.02, O6 0, O01-0, OOZ

Bor 0, OOZZ-O, OO8

Nitrogen Else

Iron

15

The ratio of the boron content to the nitrogen content is at least O, 25, and the ratio of the boron content to the aluminum content is at least O, 05.

20

The chemical composition of the investigated heats of known and proposed steels and the corresponding properties are given in the table.

CNJ

cm g

ABOUT)

with

gn cm

ABOUT)

oh oh

about

yu.n

oh oh

about

t

about

fso

f

with

cm hyu

WITH

I i a i “

"Igiz

o f o g ....

a shaw Procability is determined on single-sided samples according to GOST 5657-69. Mechanical failures during stretching were determined on specimens with a diameter of 4 mm, according to TOAST 1497-61, and the angle of bend before the occurrence of a crack is according to YST 14019-68. In the manufacture of tempered-tempered wire, increased puncturing ensures uniformity of the physical properties along the length (the absence of non-punched sections). This reduces the marriage in the manufacture of wire and out of it. An increase in technological plasticity also leads to a shrinkage in the manufacture of wire and eliminates the destruction of the springs during their winding and operation. The expected economic efficiency due to reduced scrap in the manufacture of springs from hardened-dried wire with increased uniformity of mechanical properties and ductility is 30 rubles / ton of wire. In addition to the hardened-tempered wire, the spring can be used in the manufacture of other resilient elements, where high hardenability, ductility, and high fatigue strength are required. M s The expected economic effect from the introduction of the proposed steel is 10.5 thousand rubles. in year. The invention claims 1.Steel, carbon carbon, manganese, silicon, chromium, boron, iron, characterized in that, in order to increase hardenability in the process of plasticity, it additionally contains aluminum and nitrogen at. The following components relate, wt.%: Carbon, 6-O, 7c Manganese 0.1-G, 3 Silicon O, 01-3 Chromium 0.01-1.2 Aluminum 0,, 06 Bor0.001JO, OO3 Nitrogen0.0033-0.008 IronEalum 2 Steel according to claim 1, that is, that the ratio of boron content to nitrogen content is not less than O, 25, the ratio of ores to aluminum content is not less than 0.05, Sources of information taken into account when assessing 1.GOST 14959-69. 2. Japanese patent number 51-77173, l. 1O 3 172 (C 22 C 38/28) publ. 11.O1.78.

Claims (1)

The claims 1. Steel containing carbon, manganese, silicon, chromium, boron, iron, characterized in that, in order to increase hardenability and technological ductility, it additionally contains aluminum and nitrogen in the following ratio, wt.%: Carbon 0.6-0.76 Manganese 0.1-1.3 Silicon 0.01-3 Chromium 0.01-1.2 Aluminum 0.02-4), 06 Boron 0.001-47.003 Nitrogen 0.0033-0.008 Iron Rest 2. Steel by p. 1, about t and h and y - and I'm with me that, the ratio containing— The ratio of boron to nitrogen content is not less than 0.25, the ratio of boron to aluminum content is not less than 0.05,