SU840179A1 - Alloy for deoxidizing and alloying steel - Google Patents

Description

(.54) ALLOY FOR DECOMPOSITION AND STEELING OF STEEL

This invention relates to ferrous metallurgy, in particular to the production of ferroalloys and master alloys for alloying and deoxidizing steel.

Known alloy of the following composition, wt.%: Manganese 20-60. chromium 20-60, silicon 0.3-5.0, carbon 0.7-2.0, sulfur and phosphorus not more than 0.03, but the rest is l}.

However, the chosen ratio of components does not allow deoxidation and alloying with one alloy. Along the course of the tension, it is necessary to introduce other deoxidizers, such as ferroSICILY, silicomanganese and doping compounds - nitrated manganese and ferrotitanium. In addition, the presence of carbon in the alloy, 7-2.0%) is an undesirable impurity that degrades the properties of the finished steel.

An alloy is known for alloying and deoxidizing steel of the following composition, wt.%: Manganese 15-30, chromium 3545, silicon 9-13, aluminum 2-5, carbon 0.1-5, iron - the rest is J2.J.

A disadvantage of the known alloy is a low chromium content and high manganese. When used for steel deoxidation, an additional additive of ferroalloy containing chromium and silicon is required. The presence in the composition of the known ligature of aluminum and the absence of titanium and nitrogen limits the range of steel for which it can be used.

The closest to the proposed technical essence and the achieved result is the following composition, wt.%; manganese 5-15, chromium 55-65, silicon 1, carbon 0.02, phosphorus 0.03, iron - the rest 3 ..

The disadvantage of the alloy is that it does not contain titanium and nitrogen, and the ratio of the components of the alloy is such that when it is used for alloying and deoxidizing steel, for example, stainless steel tube,

additional introduction of silicon containing ferroalloys, and for micro-alloying of steel with titanium and nitrogen, nitrated manganese and ferrotitanium. This leads to an increase in the consumption of ferroalloys with a decrease in the assimilation of elements by steel and the increase in the cost of the alloying process 1.

The purpose of the invention is to assimilate deoxidizing and alloying materials and to simplify the technology of steel alloying.

The purpose of the dagger is 1gzek: in that the proposed activity a; additionally contains titanium and nitrogen of the following components: wt.%: Mar aned 3-18

45-70,

1-5

Krvmga

0.05-0.5 Carbon 0.01-8 Titanium

Nitrogen Iron Else In the alloy may be inevitable impurities and concomitant elements 70

50

45

15

50

18

70

ten

64

60

ten

Famous

you are vtcepa, phosphorus, magnesium, aluminum, calcium, etc., from en Yupche properties of alloy and steel, in an amount up to 2% in total,

This can be obtained by any known methods that provide a given composition, for example, in an electric furnace of chromium ore and silicon manganese with the addition of titanium wastes and purging of a liquid metal with nitrogen, by fusing the appropriate ferrosylavs into the “sintering furnace”

The alloy can be used to alloy and deoxidize steel in both liquid and solid form.

In tab. 1 shows the compositions of the proposed alloys.

In tab. 2 presents data on the absorption of titanium and nitrogen by steel.

In deoxidation and doping with known lava, ferrotitanium is additionally introduced, and the melt is flushed with gaseous nitrogen.

Table 1

0.01 Else

0.2

0.1

4.8

Also

2,50,5

0.01 0.050.5

it

0,50,3

0.8

and

7.0

5,00,4

0.04

0.25

8.0

eleven

0.02

Table 2

Claims (3)

1. USSR author's certificate number 287313, cl. C 22 C 35/00, 1970. 2. USSR author's certificate number 382735, cl. C 22 C 35/00, 1973. 3. Complex alloys for doping, deoxidation and modification Catalog, 1973, p. 27.