SU929735A1 - Austenitic steel composition - Google Patents

Description

(54) AUSTENITE STEEL

I

The invention relates to black megalurgy, in particular, in the search for materials for the manufacture of ethels, which have damaged the dynamic loads under conditions of intense abrasive wear and wear.

Closest to the present, to the technical essence and the achieved result is austenitic steel I, with concomitant, wt.%:

CarbonO 4-1

Chrome 5-18

Manganese2-6.5

Silicon0,1-1

BorDo 0, O2

and oooin or more elements from the group: Lightning, tungsten, Vanaoiy0, O5-2

IronErest

Oonako steel in the process of operation does not provide high hardening of the working surface of the parts when they work in conditions of abnormal wear and abrasion in the area of low treminess

when casting and heat treatment, low hardness and wear resistance, gf-j screams to low on the tenderness of details, to the phobia grinding grinding as a whole.

The purpose of the invention is to increase the wear resistance and resistance to cracking.

The goal is achieved by the fact that austenitic steel, containing carbon, silicon, manganese, chromium, boron, vanapium, molybdenum and iron, additionally contains titanium, aluminum, calcium, with a specific ratio of components,

US l

O, 4-1, O

Carbon 4, O-6, O

Chrome 6, O 13, O

Manganese 0.1-0.7

Silicon О, ОО5-О, О2

Boron

Oh, O2-0,12

Teagan O, O2-O, Sh

Aluminum OO2-O, 02

Calcium 0.05-1.0

Vanaoiy Molybdenum 0.5-1.0 Iron Other, provided that Yu Ssg. In Table I, the chemical compositions of sgaley are coined. In gab. Table 2 shows the results of wear resistance and crack resistance tests. Analysis of the state of armor plates made of known and known steels after galvanizing operation revealed that the plates of known steel wear out much faster than the claimed one, since the work hardening speed is lower than the abrasive wear rate, and the initial hardness is clearly insufficient to resist abrasive effects of the material. The study of the microstructure and solidity of the sample cut from an armored plate made of steel allowed us to confirm the results of laboratory studies of serial films. Thus, the proposed steel is strengthened during deformation much more intensively. At the same time, the hardness increases to 653 HB, and the inclined layer of the working surface reaches 6 mm (known to be 3 mm), which provides for increased durability of the plates under conditions of intense abrasive and hydroabrasive wear in the presence of impact loads. It is known that grinding blocks & necessary for hardening during tilting and the most intensive hardening observed in the early 54 x deformations of known austenitic manganese steels, is accompanied by the most intensive crushing of blocks. In the well-known steel, the first 3% of deformation levels are characterized by rapid grinding blocks, the block crushing process is slowed down and when deformed above 3%, it becomes hardly noticeable. With complex doping using these additional doping additives, as well as by reducing the chromium content to (4-6)% and expanding the manganese limits (5-1)%, the proposed steel acquires a new quality, reaching a critical size and nominal block size due to stable increase the speed of hardening during deformation. Moreover, the accelerated hardening that occurs in the preceding stages of deformation is accompanied by stable and intense crushing of btcats, which is suspended at 45-5% deformation, The hardening itself continues with deformation above 80%. Inspiration In the production of the proposed steel, it provides oi livo4 {high purity on nonmeta / licheski turn on1 m, with high technical properties during casting and heat treatment, as well as significantly hardening parts in the course of operation and increasing the reliability and durability of the equipment as a whole .

I

2 4

F. formula

1. Austenitic steel containing carbon, silicon, manganese, chromium. boron. Vanosium, molybcene and iron, characterized in that. what. in order to improve wear resistance and crack resistance. it supplements societal titanium, aluminum, calcium with a barely-30 ratio of components, wt.%:

Carbon 0.4-1.0

Silicon0.1-O.7 Manganese6 .0-13.0

Chrome4, O-6.035

BorO.OO5-OO2

table 2

1.46

Claims (1)

1.8 1.56 2.4 1.67 3.0 0.05-1.0 О, 5-1.О 0.02-0.12 0.02-0. 10 O.002-O, 02 Else 2, Steel according to claim 1. characterized by that. that the amount of chromium and manganese is in the range of 10-20. Sources of information taken into account in the examination I. Patent of Sweden Nf 367458. class. C 22 C 39/28. 1971