Steel 30Х2ГСН2ВМ (30Х2ГСН2М1; VL-1)
|Designation GOST Cyrillic||30Х2ГСН2ВМ|
|Designation GOST Latin||30X2GCH2BM|
|By chemical elements||30Cr2MnСН2WMo|
|Designation GOST Cyrillic||30Х2ГСН2М1|
|Designation GOST Latin||30X2GCH2M1|
|By chemical elements||30Cr2MnСН2Mo1|
|Designation GOST Cyrillic||ВЛ-1|
|Designation GOST Latin||BL-1|
|By chemical elements||WBe-1|
30Х2ГСН2ВМ steel is used: for the manufacture of complex parts (wing spars, stabilizers, fuselage frames); solid-rolled rings from various industrial purposes.
Хромокремниевомарганцевоникелевая high strength structural steel with molybdenum and tungsten.
|Classification, nomenclature and General rules||В20||OST 1 90005-91|
|Bars and shapes||В32||OST 1 90226-76, TU 14-1-1885-85, TU 14-1-413-72|
|Norms for calculation and design||В02||PI 1.2.053-78|
|Blanks. Of the workpiece. Slabs||В31||TU 14-1-2256-77, TU 1-92-156-90|
According to TU 14-1-413-72, the chemical composition is presented for steel grade 30Х2ГСН2ВМ (VL-1). In the finished varietal slope, subject to the requirements of the technical specification, deviations from the chemical composition standards are allowed in accordance with Table 2 TU 14-1-950-74, except for carbon, the deviation in which is not allowed. The presence of residual copper in steel should not exceed 0.250%. The total mass fraction of sulfur and phosphorus should not exceed 0.0220%. Deviations in sulfur and phosphorus are allowed provided that their total mass fraction does not exceed 0.0220%. A partial or complete replacement of tungsten by molybdenum at a rate of 2.5 parts by weight of tungsten is possible with a single part by weight of molybdenum. When molybdenum is completely replaced by tungsten, the molybdenum content in steel should be 0.75-1.00%. Steel in this case has the marking 30Х2ГСН2М1 (ВЛ-1).
According to TU 14-1-1885-85 the chemical composition is presented for steel grade 30Х2ГСН2ВМ-ВД (ВЛ-1-ВД). In steel, the sum of the content of phosphorus and sulfur should not exceed 0.022%. To ensure the required grain size, it is allowed to introduce vanadium in the steel smelting at the rate of its content in steel no more than 0.10%, the content of which in steel is not determined. The presence of titanium up to 0.030% is not a rejection sign. The permissible deviation in the content of manganese in steel is + 0.010 / -0.020%, in carbon content + 0.010%, in sulfur and phosphorus content, provided that their total content is not more than 0.022%.
|Section, mm||σU, MPa||d5, %||y, %||KCU, kJ/m2||HRC|
|Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91|
|Ring clinocerinae for OST 1 90226-76. Annealing in air with 920-940 °C + Vacation at 200-300 °C, air cooling|
|Bars hot rolled on the other 14-1-413-72. Annealing in air from 930 °C±10 ° C + Vacation at 200-300 °C, air cooling (longitudinal samples, KCUвдоль/KCUпоперек)|
|Bars of steel 30Х2ГСН2ВМ (VL-1) TU 14-1-1885-85. Annealing in air with 920-940 °C + Vacation at 200-300 °C, air cooling. In the graph KCU KCU values are shown along the fiber/KCU across the grain|
Description mechanical marks
|σU||Limit short-term strength|
|d5||Elongation after rupture|
|y||The relative narrowing|
|HRC||Rockwell hardness (indenter diamond spheroconical)|
|Weldability||Welded by manual arc welding, after which, without allowing cooling of the welds below 200°, the parts are transferred into an oven with a temperature of 650 °C and then cooled in air.|
|Macrostructure and pollution||Macrostructure of steel when testing for the breaks in the longitudinal direction and transverse templeto selected from rolled, should not have shrinkage, porosity, bubbles, cracks, delamination, inclusions and placenow and defects of fracture, listed in Annex 3 GOST 10243. The Central porosity, point heterogeneity and phase separation in the square should not exceed 1 points; layer-by-layer crystallization and the bright loop - 3 points reference scales GOST 10243. All other defects under GOST 10243, are not allowed. Pollution steel non-metallic inclusions should be according to the average score is not higher (in points): oxides of point 1,5, 2,0 stroke oxides, silicates fragile 1,0, 1,0 silicates plastic, silicates, non-deformed 2,5, 2,5 sulfides, nitrides stroke and point 1,0.|
|Microstructure||Grain size of steel on the other 14-1-413-72 should be no larger than 5 points scales according to GOST 5639.|
|Particularities of production of goods||Bars hot rolled on the other 14-1-413-72 and OST 1 90226-76 supplied after heat treatment (annealing) with hardness not exceeding 269 HB (indentation diameter not less than 3.7 mm. Recommended mode softening annealing: Heating to 800 °C (exposure to heating), cooling with the furnace to 650 °C (aged for at least 12 h), air cooling.|