SU530922A1 - Alloy for deoxidizing and alloying steel - Google Patents

Description

The invention relates to the field of metallurgy and can be used to produce high-quality casting steels with improved physicomechanical properties. To improve the quality of steel, small amounts of rare-earth metals in the form of ferroceri or mismetal are introduced into it. However, a large and uneven loss of rare earth metals is observed as a result of the effect of deoxidizing elements on improving steel uniformity and mechanical properties is not permanent. Known alloy for deoxidation and alloying of steel of the following composition, wt.%: 16 - 30 Aluminum 40 - 77 Manganese Rare-earth 1-10 metals 2-25 Iron Impurities; 0.5–3.0 silicon 0.3–4.0 2. carbon However, when steel is deoxidized, this alloy has the strength properties to a value that satisfies the design requirements for the league steel for casting machine parts. The purpose of the invention is to improve the physical and mechanical properties of cast steel, especially its strength. This is achieved by the fact that the alloy additionally contains gigantic, magnesium and vanadium in the following ratio between the components, wt.%: Manganese 2 O - 70 Aluminum 15 - 45 Iron 5-55 Rare-earth metals 1 - 15 Carbon 0.1 - 3 Types 1 - 15 Magnesium 2 - 10 Vanadium 1 - 10 The proposed alloy contains impurities, wt.%: Silicon 0,35 3, O; sulfur 0.001 0, OZ; phosphorus 0, OO1 - 0, OZ. Example. To determine the optimal composition for the deoxidation and alloying of Steel, its various compositions were tested and tested. Slavov processed steel grade

4 OX NML, Cfg was treated with an additive of 0.3 wt.% Alloy for deoxidation and doping.

In tab. 1 shows the chemical composition of the alloys,

Table 2 shows the mechanical properties of the 40KhNML cast steel treated with the alloys given in Table 2. 1 composition.

The steels are heat-treated according to the mode: normalization 880 С; quenching 860 ° С (oil) and tempering 550 С,

Processing low-carbon carbon steel grades offered by the alloy

exceeds the efficiency of the known ligature for steel deoxidation. The strength of the investigated steel treated with the alloy of the proposed composition is significantly higher than that of steel treated with an imitation alloy.

The proposed composition of the alloy for casting and alloying steel can be widely used in the metallurgical and engineering industries for the production of high-quality casting steels with enhanced physical and mechanical properties.

Table 1

43

20

27

eight

0.3

the

rest

high alloy

99.5

110

125.5

113.5

112.5

123

127

114.5

113

124.5

44

42 20

40

sixteen

sixteen

20 12

12

1.5

four

6

2 5 3

0.5

3 15

2

10 5 4

2

10 10

7 1.5

rest

steel else else

table 2

4.00

32.5

10.5

5.25

37

13

38.5

11.5

5,5O

5.50

12

36.5

5.25

37.5

12.5

F o

zobregeni

pm lla

An alloy for deoxidizing and alloying steel containing manganese, aluminum, iron, rare earth metals, and carbon, characterized in that, in order to improve the physical and mechanical properties of steel, it additionally contains titanium, Ignium and vanadium in the following ratio between the components, wt.% : Manganese20-70

Aluminum15-45

Iron 5-55

spruce

1-15 0.1 - 3

1-15 2-10 1-10

Sources of information taken into account in the examination:

1, Bulletin Chermetinformatsi, No. 5 (649), 1971., p. 33.

2. USSR author's certificate number 418549, cl. C 22 C 35/00, 05.29.72.