Automatic Welding, 2017, №02



2017 №02 (03)

DOI of Article 10.15407/as2017.02.04

2017 №02 (05)

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Avtomaticheskaya Svarka (Automatic Welding), #2, 2017, pp. 21-24
 

Effect of welding modes on mechanical properties, structure and brittle fracture susceptibility of welded joints of steel 15Kh1M1FL made without preheating

N.G. Efimenko¹, S.V. Artemova² and S.N. Bartash¹

¹NTU «Kharkov Polytechnic Institute» 21 Frunze Str., 61002, Kharkov, Ukraine. E-mail: svarka126@ukr.net
²PJSC «Turboatom» 199 Moskovsky Av., 61037, Kharkov,Ukraine
 
Abstract
Structure and properties of metal of HAZ high-temperature area and weld were investigated in 15Kh1M1FL steel welding at higher modes using transverse hill method without preheating. Comparison of the received results with research data of welding process at moderate modes (160–170 A) determined that rise of current to 200–210 A results in increase of susceptibility to brittle fracture of HAZ high-temperature area and weld metal. The reason for this is high hardness caused by presence of martensite constituent in a bainite structure. 3 Ref., 1 Table, 5 Figures.
 
Keywords: steel, welding, preheating, bainite, martensite, brittleness, properties, structure
 
 
Received: 04.08.16
Published: 16.03.17
 
 
References

1. Nazarchuk, A.T., Snisar, V.V., Demchenko, E.L. (2003) Producing welded joints equivalent in strength on quenching steels without preheating and heat treatment. The Paton Welding J., 5, 38–45.
2. Efimenko, N.G., Atozhenko, O.Yu., Vavilov, A.V. et al. (2014) Structure and properties of welded joints of 15Kh1M1FL steel at repair of casting defects by transverse hill method. Ibid., 2, 42–46. https://doi.org/10.15407/tpwj2014.02.06
3. Shorshorov, M.Kh., Belov, V.V. (1972) Phase transformations and change of steel properties in welding: Atlas. Kiev: Nauka.