Properties and Microstructure of Laser Welded VM12-SHC Steel Pipes Joints

Open access

Abstract

Paper presents results of microstructure and tests of welded joints of new generation VM12-SHC martensitic steel using high power CO2 laser (LBW method) with bifocal welding head. VM12-SHC is dedicated to energetic installation material, designed to replace currently used. High content of chromium and others alloying elements improve its resistance and strength characteristic. Use of VM12-SHC steel for production of the superheaters, heating chambers and walls in steam boilers resulted in various weldability researches. In article are presented results of destructive and non-destructive tests. For destructive: static bending and Vickers hardness tests, and for non-destructive: VT, RT, UT, micro and macroscopic tests were performed.

[1] M. Scendo, M. Chat, B. Antoszewski, Oxidation Behaviour of Laser Welding of TP347HFG and VM12-SHC Stainless Steels, Int. J. Electrochem. Sci. 10 (2015).

[2] A. Radziszewska., S. Kąc, M. Solecka, Characterization of microstructure and properties of laser welded boiler pipes, NM-NT (2015).

[3] M. Urzynicok, K. Kwieciński, M. Szubryt, Testing of pipe joints in VM12-SHC martensitic steel, Bulletin of the Institute of Welding, 42-46, (2010).

[4] U. Dilthey, A. Ghandehari, W. Bleck, I. Budak, Mechanical - technological properties of beam welded high and ultra high strength steels, Zeitschrift für Metallkunde 92(3), 221-225 (2001).

[5] M. Urzynicok, K. Kwieciński, J. Słania, Application of new gmaw welding methods used in prefabrication of P92 (X10CrWMo- VNb9-2) pipe butt welds, Przegląd Spawalnictwa 81(10), 13-19 (2009).

[6] W. Pawełczyk, K. Wojsyk, The properties of homogeneous and heterogeneous joints of VM12 and X20CrMoV12-1 steels, Przegląd Spawalnictwa 4, 5-9 (2015).

[7] A. Kimpel, Laser Technologies, Gliwice (2012).

[8] G. Golański, A. Kępa, Modern steels for energetic, characteristics, Częstochowa (2011).

[9] J. Dobrzański, New-generation creep-resistant martensitic steel containing 9-12%Cr for elements of steam superheater of boilers operating at supercritical parameters, work of IMŻ 4, (2011).

[10] K. Pańcikiewicz, S. Kwiecień, E. Tasak, The properties of joints of 7CrMoVtiB10-10 (t24) steel after heat treatment, Przegląd Spawalnictwa 8, 8-14 (2010).

[11] PN-EN ISO 4136: Destructive tests on welds in metallic materials - Transverse tensile test.

[12] PN-EN ISO 5173: Destructive tests on welds in metallic materials - Bend tests.

[13] PN-EN ISO 17637: Non-destructive testing of welds - Visual testing of fusion-welded joints.

[14] PN-EN ISO 13919-1: Welding - Electrons and laser beam welded joints - Guidance on quality levels for imperfections - Part 1: Steel.

[15] PN-EN ISO 17636-1: Non-destructive testing of welds - Radiographic testing - Part 1: X- and gamma-ray techniques with film.

[16] PN-EN ISO 10675-1: Non-destructive testing of welds - Acceptance levels for radiographic testing - Part 1: Steel, nickel, titanium and their alloys.

[17] PN-EN ISO 6507-1: Metals - Vickers hardness test method - Part 1: Test method.

[18] PN-EN ISO 15614-11: Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 11: Electron and laser beam welding.

[19] PN-EN ISO 17639: Destructive tests on welds in metallic materials - Macroscopic and microscopic examination of welds.

[20] M. Zeman, S .Błacha,Weldable new generation martensitic creep- -resisting steels, Przegląd Spawalnictwa 86(4), (2014).

[21] A. Strang, V. Vodarek, H.K.D.H. Bhadeshia, Modelling of Microstructural Evolution in Creep Resistant Materials, The Institute of Materials, London, 129-150 (1999).

[22] J. Brózda, New generation high-temperature creep resistant steels, their weldability and properties of the welded joints, Bulletin of the Institute of Welding 1, (2004).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

Journal Information


IMPACT FACTOR 2016: 0.571
5-year IMPACT FACTOR: 0.776

CiteScore 2016: 0.85

SCImago Journal Rank (SJR) 2016: 0.347
Source Normalized Impact per Paper (SNIP) 2016: 0.740

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 149 145 10
PDF Downloads 69 67 6