SU933786A1 - Steel composition - Google Patents

Description

The invention relates to the engineering, in particular, to the production of hot-calibrated steel strength and technological properties, intended for the manufacture of parts by the method of charge, the mass of personnel responsible for thermal treatment. , Steel 1, steel is known, weight: 11.10-0.30 Carbon 0.5-1.35 Manganese Up to 0.4 Silicon 0.2-0.85 Up to 0.25 Nickel 0.07-0.2 Molybdenum 0 0005-0 iOO 0.035-0.13 0.001-0.01 Calcium Up to 0.3 Aluminum 0.01-0.03 and Chile 0.003-0.05 Aluminum 0.01-0.10 and (or) 0.01- 0.10% niobium Up to 0.015 Iron Else This steel is characterized by improved cutting performance due to its high sulfur content (1.0353), however, it has low readability and processability. Closest to the proposed technical entity and the result is steel f2, coagulating, wt.%: Carbon 0.05-0.25 0.20-0.60 Silicon 0.2-1.2 Manganese 0.01 0.1- 0.6 0.1-1.5 Vanadium 0.02-0.10 Aluminum 0.003-0.15 0.001-0.005 Lanthanum, 005-0.10 One or more of the following elements: Titanium 0.005-0.10 Zirconium 0.005-0.1 Molybdenum 0.2-1.0 Iron Else This steel has a high durability and low ductility, which determines its low workability. The aim of the invention is to understand the technological properties of the steel. To achieve the delivered center steel containing carbon, marga silicon, chrome , boron, aluminum, wa Dy, rare earth metals and also contains components in the following ratio in wt.%: As an impurity, steel can contain sulfur up to 0.032. copper to 0, AO% and nickel to 0.35%. The chemical composition of the studied melts is given in Table. 1. h Metal is rolled on an industrial experimental mill NIIMa 250 / 105x350 per square. In steels of the class under consideration, intended for cold deformation, ij (die forging, upsetting), their temperament, cold deformability, as a rule, is determined by plastic properties and the ability of steel to be shaped (/ deformation degree at the draft). In tab. 2 shows the mechanical properties of the steel after cooling from rolling heating. As can be seen from the presented data, the described steel already after cooling from rolling heating is characterized by significantly higher elongation values than the known steel. The mechanical properties in an improved state after quenching from 820-850 seconds in oil and tempering are presented in Table. 3. L Technological properties are presented in table. . The obtained data showing a lower cold-deforming ability of a known steel was confirmed by the industrial manufacture of parts of complex figure 1i (sprayer nut undergoing heterogeneous and locally high deformation reaching 80%. The yield of suitable parts made of steel of the described composition is 100%, and using known steel 52. The economic efficiency of the invention is achieved due to the increased processability of the metal during the cold deformation process by 20% and the reduction in the cost of the rolled product by 50 rubles / ton. Effective The rate of implementation of the proposed low-alloyed boron steel for cold heading mass parts is 500 thousand rubles.

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Claims (2)

Proposed Claims of Invention Steel containing carbon, manganese, silicon, chromium, boron, aluminum, vanadium, rare earth metals and iron, characterized in that, in order to improve technological properties, it contains components in the following ratio, wt.%: 0.14-0.26 Carbon 0.3-0.6 Manganese 0.03-0.17 Silicon 0.86-1.25 Chromium 933786 10 Table 0.0005-0.003 0.03-0.07 Aluminum 0.005-0.05 Vanadium Rare-earth 0.005-0.03 Metals Else Iron Sources of information taken into account in the examination 1. Accept Japan, cl. 10 J 172, 1972. 2. For Japan No. 52-13191, 10 J 172 / C 22 C 38/32 /, published. 05.11.77.