SU1227710A1 - Steel - Google Patents

Description

one .

The invention relates to metallurgy, namely, spring steel with a high resistance to low plastic deformations, increased fatigue strength and viscosity at climatic temperatures, up to.

 The combination of high values of elastic limit, fatigue limit and toughness is of great importance in the manufacture of heavy duty elastic elements, such as products such as torsion shafts.

The purpose of the invention is to increase the elastic limit, the fatigue limit and the toughness of the steel.

0.45 4.0 0.8 0.7 0.3 0.7

Note. Meltings 2, 3, and 4 — steel is proposed, melting 6 — steel is known, and melting 1 and 5 are steel with components outside the proposed limits.

277102

The chemical composition and properties of the investigated heats of the proposed and known steels are given in table. 1 and 2. The specimens for testing the mechanical 5 properties were subjected to the following heat treatment: quenching from 1020 to 1050 ° C (exposure 40 min) with cooling in oil and tempering at 550-560 ° C.

From tab. 2 it can be seen that the proposed steel, as compared with the known one, has a higher complex of mechanical properties, a higher elastic limit and an endurance limit, which will allow reducing the metal consumption of articles (torsion shafts). The significantly higher toughness value of the proposed steel ensures greater reliability of the products under conditions of low temperatures of 20.

Table

1.5 0.001 0.0008 Else

Editor M. Dylyn

Order 2267/30 Circulation 567 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design, And

table 2

Compiled by V. Brostrem

Tehred L.Oleynik Proofreader E. Sirohman

Claims (1)

STEEL containing carbon, silicon, manganese, chromium, molybdenum, vanadium, titanium, iron, characterized in that, in order to increase the elastic limit, endurance and impact strength, it additionally contains boron and nickel in the following ratio of components, May . %: Carbon 0.5 - 0.6 Silicon 0.9 - 1.4 Manganese 0.8 - 1.1 Chromium 4,5 - 5,5 Molybdenum 0.8 - 1.2 Vanadium 0.4 - 0.6 Titanium 0.05-0.12 Boron 0.001-0.006 Nickel 2.0 - 4.0 Iron Rest