Development of Recommendations for Optimizing the Chemical Composition of the Sv-08G2C Welding Wire in its Production

The purpose. The aim of the work is to develop recommendations for the optimization of the chemical composition of the steel to be produced, intended for the manufacture of welding wire Sv-08G2S, by the criterion of guaranteed production of a given value of the impact toughness of the metal deposited by the wire during arc welding in shielding gas.  

Methods. The equations reflecting statistically significant correlation in the sample of 22 low-alloy structural steels between the generalized relations of metallicity and covalency for the set of interatomic bonds in these steels with their impact viscosity are considered. It is proposed to use a regression dependence, linking the respect to the generalized degrees of metallicness and covalently for the totality of interatomic bonds in the metal of welding wires with impact toughness of metal weld in arc welding in the protective gas data wires. 

Results. The relative influence of molar fractions of chemical elements (within the limits of possible variation of their mass content in the welding wire Sv-08G2S, regulated by GOST 2246) at different temperatures on the toughness of the metal deposited in carbon dioxide by the wire Sv-08G2S. It is shown that the set value of the impact toughness of the deposited metal can be provided at different content of alloying elements and impurities in the welding wire Sv08G2S, but the ratio of the generalized degrees of metallicity and covalency for the set of interatomic bonds in the metal wire remains unchanged. It is shown that when smelting steel intended for the production of welding wire Sv08G2S, to ensure the guaranteed required value of the impact strength of the metal deposited by the welding wire, it is required by varying the chemical composition (within the limits determined by GOST 2246) to provide in various smelters the specified value of the ratio of the generalized degrees of metallicity and covalency for the set of interatomic bonds in the smelted steel. 

Conclusion. The algorithm reflecting the developed recommendations on optimization of chemical composition of welding wire Sv-08G2S at its smelting by criterion of providing the set shock viscosity of the metal deposited by this wire at arc welding in shielding gas is developed.

1. Gromov Е. V., Danilov V. I., Zellermayer V. L., Sizova О. V. Struktura i svoystva provoloki iz stali 08G2S posle elektrostimulirovannogo volocheniya [Structure and properties of wire made of 08G2S steel after electrostimulated drawing]. Fizika metallov i metallovedenie = Physics of Metals and Metallurgy, 1992, vol. 3, pp. 129–135.

2. Metallicheskiye konstruktsii. T. 1. Obshchaya chast': spravochnik proyektirovshchika [Metal constructions. Vol. 1. General part: designer's guide]; ed. by V. V. Kuznetsov. Moscow, ASV Publ., 1998. 576 p.

3. STO 00220368-012-2008. Svarka sosudov, apparatov i truboprovodov iz uglerodistykh i nizkolegirovannykh staley [STO 00220368-012-2008. Welding of vessels, apparatus and pipelines from carbon and low-alloy steels]. Volgograd, JSC "VNIIPTkhimnefteapparatury", 2008. 39 p.

4. Gultsin A. S., Sokolov A. A., Zaitseva M. V., Bakaev D. R. Povysheniye kachestva svarochnoy provoloki iz stali marki Sv-08G2S v usloviyakh OAO "MMK» i OAO «MMKMETIZ" [Improving the quality of steel welding wire Sv-08G2S in the conditions of OAO "MMK" and OAO "MMK-METIZ"]. Gornyi zhurnal = Mining magazine, 2013, vol. 3, Special issue, pp. 75–79.

5. Surkov A. V., Kipiani P. N., Volobuev Yu. S., Yakovlev V. V. Elektrodnaya provoloka Sv-08G2S-S dlya svarki v gazovykh smesyakh na osnove argona i uglekislogo gaza [Sv08G2S-S electrode wire for gas-shielded welding based on argon and carbon dioxide]. Varochnoe proizvodstvo = Welding production, 2009, vol. 5, pp. 33–37. (In Russ.)

6. Solntsev Yu. P., Andreev A. K., Serditov A. E. Khladostoykiye i iznosostoykiye liteynyye stali [Cold-resistant and wearproof casting steels]. St. Petersburg, Khimizdat Publ., 2007. 336 p.

7. Skutin V. S. Razrabotka tekhnologii svarki konteynerov dlya khraneniya i transportirovki otrabotannogo yadernogo topliva, obespechivayushchey khladostoykost' svarnykh soyedineniy pri temperaturakh do minus 50 °C. Diss. kand. tekhn. nauk [Development of welding technology for containers for storage and transportation of spent nuclear fuel, which ensures the cold resistance of welded joints at temperatures up to minus 50 °C. Cand. eng. sci. diss.]. St. Petersburg, 2015. 222 p.

8. Larionov V. P. Khladostoykost' materialov i elementov konstruktsiy rezul'taty i perspektivy [Cold resistance of materials and structural elements, results and prospects]. Novosibirsk, Nauka Publ., Sib. Otd-nie, 2005. 290 p.

9. Protopopov E. A. Otsenka udarnoy vyazkosti nizkolegirovannykh staley [Estimation of impact strength of low alloy steels]. Zagotovitel'nye proizvodstva v mashinostroenii = Blank production in mechanical engineering, 2010, vol. 10, pp. 35–38.

10. Bashmakov V. E., Georgiev M. N., Kolodyuk V. P., Mezhova N. Ya. Sravneniye kriticheskikh temperatur khrupkosti, opredelennykh na obraztsakh s razlichnymi kontsentratorami napryazheniy [Comparison of critical brittle temperatures determined on samples with different stress concentrators]. Zavodskaya laboratoriya= Factory laboratory, 1983, vol. 9, pp. 77–81.

11. Grong O. Metallurgical Modelling of Welding. Trondheim, Norwegian Institute of Technology, 1994. 581 p.

12. Protopopov E. A., Protopopov A. A., Valter A. I., Malenko P. I., Panin V. N. [Effect of the chemical composition of the Sv-08G2S welding wire on the impact toughness of deposited metal]. Welding International, 2017, vol. 31, no. 9, pp. 703–707.

13. Sergeev N. N., Gvozdev A. E., Sergeev A. N., Tikhonova I. V., Kutepov S. N., Kuzovleva O. V., Ageev E. V. Perspektivnye stali dlya kozhukhov domennykh agregatov [Perspective steels for the casing of blast-furnace aggregates]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta. Seriya: Tekhnika i tekhnologii = Proceeding of the Southwes State University. Series: Engineering and Technologies, 2017, vol. 7, no. 2 (23), pp. 6–15.

14. Zhuravlev G. M., Gvozdev A. E., Sapozhnikov S. V., Kutepov S. N., Ageev E. V. Prinyatie reshenii po statisticheskim modelyam v upravlenii kachestvom produktsii [Decision-making on statistical models in product quality management]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of Southwest State University, 2017, vol. 21, no. 5 (74). pp. 78–92.

15. Sergeev N. N., Sergeev A. N., Kutepov S. N., Gvozdev A. E., Ageev E. V. Diffuziya vodoroda v svarnykh soedineniyakh konstruktsionnykh stalei [Diffusion of hydrogen in welded joints of structural steels]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceeding of the Southwes State University, 2017, vol. 21, no. 6 (75), pp. 85–95.

16. Ageev E. V., Latypova G. R., Davydov A. A., Ageeva E. V. Provedenie rentgenospektral'nogo mikroanaliza tverdosplavnykh elektroerozionnykh poroshkov [Conducting Xray spectral microanalysis of hard-alloy electroerosive powders]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of Southwest State University, 2012, no. 5 (44), pt. 2, pp. 99–102.

17. Ageev E. V., Latypova G. R., Davydov A. A., Ageeva E. V. Otsenka effektivnosti primeneniya tverdosplavnykh elektroerozionnykh poroshkov v kachestve elektrodnogo materiala [Evaluation of the effectiveness of the use of hard-alloy electroerosive powders as an electrode material]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proce-edings of Southwest State University, 2012, no. 1, pp. 19–22.

18. Ageev E. V., Gadalov V. N., Ageeva E. V., Bobryshev R. V. Poroshki, poluchennye elektroerozionnym dispergirovaniem otkhodov tverdykh splavov – perspektivnyi material dlya vosstanovleniya detalei avtotraktornoi tekhniki [Powders obtained by electroerosive dispersion of solid alloy waste - a promising material for restoring parts of automotive equipment]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2012, no. 1 (40), pt. 1, pp. 182–189.

19. Ageev E. V., Semenikhin B. A., Ageeva E. V., Latypov R. A. Issledovanie khimicheskogo sostava poroshkov, poluchennykh elektroerozion-nym dispergirovaniem tverdogo splava [A study of the chemical composition of powders obtained by electroerosive dispersion of a hard alloy]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proce-edings of Southwest State University, 2011, no. 5 (38), pt. 1, pр. 138a–144.

20. Ageeva E. V., Latypov R. A., Burak P. I., Ageev E. V. Poluchenie tverdosplavnykh izdelii kholodnym izostaticheskim pressovaniem elektroerozionnykh poroshkov i ikh issledovanie [Obtaining hard-alloy products by cold isostatic pressing of electroerosive powders and their research]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of Southwest State University, 2013, no. 5 (50), pp. 116–125.