SU827587A1 - Steel - Google Patents

Description

(54) STEEL

The invention relates to ferrous metallurgy to the development of cast and deformable wear-resistant chromium-margadze steels with high 1M | and mechanical and casting properties, workability and wear resistance.

Known steel G13L 1.

The disadvantages of this steel are low yield strength, wear resistance, high flowability, and poor machinability.

The aim of the invention is to increase the yield strength, wear resistance, fluidity, machinability.

This goal is achieved by the fact that the proposed steel is additional.-It x / rum, vanadium, nitrogen, boron, tellurium, calcium and cerium with the following ratio of components, weight. %:

Carbon

0.4-0.64

Chrome 11.5-12.5

Manganese 7.6-8.5 0.3-1.0

Silicon

Vanadium 0.16-0.3

Nitrogen 0.05-0.23 0,0005-0.0025

Bor 0.05-0.2

Tellurium

Calcium

oh oh oh 05

Cerium

0.03-0.1 Else.

Iron

Experienced steels were smelted and mechanical properties, wear resistance, cold rolling life and machinability of samples of the proposed and known steels were tested.

The chemical composition of the proposed steel is presented in table. one.

Table 1

Tests were carried out on the "Gagarinomykh samples with (working part 0-6 mm. The impact viscosity was determined according to GOST 9454-60, on samples of the type .1.

Samples were tested for wear resistance on 1 Amsler machine, IB conditions: - dry wear, 10% slip,

Total wear for 70 | (SO about

Known 1

The fluidity of steel is olredid la-ha by the method of spiral test. The molding was carried out in three flasks, a spiral was formed in the bottom flask, in the middle one — a hundred k, and in the top — a casting bowl. Filling was carried out in wet sandy-bentonite forms.

In tab. 5 shows the results of measurements for filled specimens.

Investigation 10) machinable by cutting when turning steel specimens was performed on a 1A62 turning pack, while turning was used incisors with plastic joints BK8.

Cast specimens with a diameter of 50 mm and 450 mm were manufactured to determine workability. Before turning

The mechanical properties of the proposed and famous steel are listed in Table. 2

Mechanical properties of forged image. The proposed steel is presented in Table. 3

table 2

Table 3

load 70 kg, shaft speed 70 000. The test results are given in table. four.

Table 4

Table 5

samples were subjected to heat treatment.

The results of tests on machinability are given in table. 6

Claims (1)

1. Metallurgy and thermal processing of metals, No. 12, 1968, p. 57-6.1.