SU679639A1 - Steel - Google Patents

Description

one

The invention relates to meta-tics, in particular to low-alloy steels used in welded structures.

Steel is the closest to the thermally sensitive to the technical essence and the achieved effect; soda, wt.%

Carbon 0.12-0.25 Manganese 0.70-1.60 Silicon 0.20-0.70 Chrome0.10-0.35

Vanadium 0.04-0.20 Aluminum 0.015-0.08 Copper0.15-0.60

Nickel 0.15-0.50 Calcium 0.006-0.10 NITROGEN. 0,005-0,03 Iron Else 1, After normalization when the steel has the following mechanical properties;

Strength, kg / mm 56-72 Yield strength, kg / mm 41-55 Relative elongation,% 25-32 impact strength at -60 ° C kgf. 4, 6 This steel has lower viscosity and cold resistance.

The object of the invention is a PSE of a toughness cold chill resistance.

To do this, steel containing carbon, manganese, silicon chromium, nickel, copper, vanadium, aluminium, nitrogen, calcium, and carbon dioxide, additionally contains rare earth metals on the next; % i

0.03-0.12

Carbon 0.8 -1.7 Manganese 0.2-0.6 Silicon 0.05-0.35 Chromium

0.05-0.50

Nickel

0.05-0.60; Copper

0.02-0.20 Vanadium

0.02-0.4 Aluminum

0.01-0.025 Nitrogen

0,001-0,1 Calcium Redkoz emel

0,001-0,08 nos metals

The rest of the iron

As impurities, steel may contain sulfur and phosphorus in an amount of 0.005-0.012 and 0.005-0.025 wt.%, Respectively.

For the production of steel, the following were carried out: smelting In a 100-ton arc furnace. The melt emits the required carbon content from the furnace.

Manganese, nickel, chromium, copper and vanadium, 200 kg of lumpy ferrosilicon calcium are added to the bottom of the ladle before release.

After releasing the metal in the casting ladle, they are alloyed with nitrogen, blowing nitrogen gas for 7-12 minutes through the gas-permeable lance the bottom of the bucket. During purging, 30-600 kg of aluminum and rare-earth welded into the metal tube are introduced into the metal on the rod.

ytally in the form of cerium or silicomash metal in terms of 0.001-0.08%. steel is poured into molds and rolled into sheets with a thickness of 10-20 mm. Sheets are subjected to normalization at 950 ° C with a holding time at a given temperature of 1.5 min / mm.

The chemical compositions of the proposed (1-5) and known C6 steels are presented in table. one; their properties in the table. 2 ..

blitz

The content of elements, wt.% ML. Si Mid Ni Si A1 .. “n. . ". X. .-ttttn | ... 0.03 1.56 0.33 0.08 0.11 0.04 0.04 0.09 1.55 0.04 0.04 0.06 0.22 0.2029 0.10 0, 83 0.37 0.09 0.12 0.19 0.350 0.10 1.67 0.20 0.31 0.46 0.58 0.060 i, 10 1.67 0.20 0.31 0.46 0, 58 0.060 1.12 1.34 0.55 0.10 0.08 0.07 0.100 0.12 1.34 0.55 0.10 0.08 0.07 0.100 1.12-0.7-0, 2-0.10-0.15-0.15-0.015 0.12-0.7-0.2-0.10-0.15-0.15-0.015 L o S 1 L 7 L OS L SP L / h l lo. 1,25.-1,6 jO, 7 -0.35 H), 50-0,60-0,08 The proposed steel in comparison with the known one has higher viscosity and cold resistance, while maintaining high strength.

Claims (1)

Invention Formula Steel containing carbon, manganese, silicon, chromium nickel, copper, vanadium, aluminum, nitrogen, calcium and iron, in order to increase the cost of a table ki and cold resistance, it additionally contains rare earth metals in the following ratio of components, wt.% 1 Carbon 0.03-0.12 Manganese 0.8-1.7 Silicon O ,, 2-0.6 Chrome0.05-0.35 Nickel0.05-0.50 Copper0.05-0.60 Vanadium 0.02-0.20 Aluminum 0.02-0.4 Nitrogen 0,01-0,025 N Oh, 0120,02 0,10 0,006 0,0200,02 0,02 0,007 0,0226 /) 020,19 0,08 0,0200,06 0,11 0,001 0,020 0,06 0, 11 0,001 0,019 0,03 0,10 0,006 0,0190,03 0,10 0,006 0,005-13 06-0, 0, 005-13 06-0, 0, 03 -0,10-0,20 l l-il tf l ff 5 Calcium0.001-0.1 Rare-earth metals0.001-0.08 Iron Others 679639; Sources of information taken into account in the examination 1. USSR author's certificate 519491, cl. C 22 C 38/00, 1974.