Abstract
The static cracking resistance of a number of welded joints made from pipe steels of K60 strength class has been determined. It has been established that the deformation parameter CTOD varies significantly at identical parameters of weldability of steels. The character of fracture has been investigated and the zone of local brittleness of welded joints has been studied. It has been shown that the ability of a metal to resist cracking is determined by the austenite grain size and by the bainite morphology in the region of overheating in the heat-affected zone of a welded joint.
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Original Russian Text © N.A. Tereshchenko, T.I. Tabatchikova, I.L. Yakovleva, A.N. Makovetskii, S.V. Shander, 2017, published in Fizika Metallov i Metallovedenie, 2017, Vol. 118, No. 7, pp. 743–751.
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Tereshchenko, N.A., Tabatchikova, T.I., Yakovleva, I.L. et al. Influence of structure on static cracking resistance and fracture of welded joints of pipe steels of strength class K60. Phys. Metals Metallogr. 118, 707–715 (2017). https://doi.org/10.1134/S0031918X17070110
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DOI: https://doi.org/10.1134/S0031918X17070110
Keywords
- pipe steel
- welded joint
- heat-affected zone
- static cracking resistance
- fracture
- austenitic grain size
- bainite morphology