SU996505A2 - Steel - Google Patents

Description

(B) STEEL

one

The invention relates to metal rot, namely to chrome-manganese steels, transitional, austenitic-mar. tensitnogo class.

Known steel, containing, in weight. %:

0.12-0, if

Carbon

Manganese

Chromium

Molybdenum 0.5-3

Copper

Silicon 0.5-1 0.6-2

Vanadium

Nitrogen 0.12-0.2 Niobium 0.05-0.1 0.05-0.08 Cerium Iron Else

According to the main author. St. (P 789626

Steel 2 is described, containing weight. %:

Carbon 0.06-0.1

Chrome13,, 0

Manganese t5.0-6.5

Silicon0,2-0,5

Nitro 0.03-0.13

2

Molybdenum0,3-1,0

Copper0.03-2.0.

Aluminum 0.05-0.1

Iron.The rest

A disadvantage of the known steels is the low strength properties after thermomechanical treatment. 7-10

The purpose of the inventions is to increase the strength of the 8-11, while maintaining plasticity after thermomechanical-machining.

to

2-c. This goal is achieved by the fact that the steel additionally contains vanadium in the following ratio of components, weight. :

Carbon0.05-0.1

15

Chrome 13.0-li, 0

Manganese5.0-6.5

Silicon0,2-0,5

Nitro 0.03-0.13

Molybdenum0,3-1,0

20

Copper0,3-2,0

Aluminum 0.05-0.1

Vanadium0,

Iron Else The described steel is of austenitic-martensitic class and contains in its structure about 60, martensite and metastable residual aycteite. The austenitic-martensitic steel known after identical processing contains less “O martensite. This explains the level of yield strength, depending on the amount of martensite after TMT.

Strength and plasticsDispersed carbides and carbonitrides

the characteristics are determined by intensively hardened austenite and martensite. Everything

development with -j ot transformation, pro-it provides an increase in the limit

flowing during tests of mechanical 5 torsion while maintaining sufficient

properties. spasticity.

Additional doping with vanadium composition and mechanical properties of the stack is carried out in order to strengthen the proposed steel of optimum composition (M) has the highest value 99

In tab. 1 and 2 are chemical

Lei after dura.

Claims (2)

Table 1 54 steel in the formation of carbides and carbonitrides. As a result of the formation of vanadium carbides and carbonitrides in TMT, austenite is depleted of carbon and nitrogen and the Mn point increases when cooled to room temperature. Therefore, after the deformation of the steel being described, additionally doped with vanadium contains a greater amount of martensite (about 60%). yield strength and strength while maintaining sufficient ductility. 5996505 It relates to high-strength stainless steel, it has become m and can be offered as a material for parts operating with significant dynamic, static loads of cavitation in oxidative corrosive media. For example, steel is capable of replacing the chromium-nickel steel used for compressor parts, gas cleaning, fasteners. The formula of the invention. Steel on Aut. St. N 789626, characterized in that, in order to increase the strength properties while maintaining plasticity after thermomechanical treatment, it will additionally contain vanadium when following the ratio of components, weight. %: Carbon0.05-0.10 Chromium13-1A Manganese5.0-6.5 Silicon0.2-0.5 Nitrogen0.03-0.13 Molybdenum0.3-1.0 Copper0.3-2.0 Aluminum0.05 -0.10 Vanadium 0.05-0.60 IronEsaltial Sources of information, which are taken into account in the examination 1. The author's certificate of the USSR, cl. C 22 C 38/38, 1976. 2. Authors certificate of the USSR 89626, cl. C 22 C 38/38, l9BO.