Submerged Arc Stainless Steel Strip Cladding—Effect of Post-Weld Heat Treatment on Thermal Fatigue Resistance

Two types of martensitic stainless steel strips, PFB-132 and PFB-131S, were deposited on SS41 carbon steel substrate by a three-pass submerged arc cladding process. The effects of post-weld heat treatment (PWHT) on thermal fatigue resistance and hardness were evaluated by thermal fatigue and hardness testing, respectively. The weld metal microstructure was investigated by utilizing optical microscopy, scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM). Results showed that, by increasing the PWHT temperature, hardness decreased but there was a simultaneous improvement in weldment thermal fatigue resistance. During tempering, carbide, such as (Fe, Cr)23C6, precipitated in the weld metals and molybdenum appeared to promote (Fe, Cr, Mo)23C6 formation. The precipitates of (Fe, Cr, Mo)23C6 revealed a face-centered cubic (FCC) structure with fine grains distributed in the microstructure, thereby effectively increasing thermal fatigue resistance. However, by adding nickel, the AC1 temperature decreased, causing a negative effect on thermal fatigue resistance.

[1]  B. Gülenç,et al.  Wear behaviour of bulldozer rollers welded using a submerged arc welding process , 2003 .

[2]  Y.C Lin,et al.  Effect of residual stress on thermal fatigue in a type 420 martensitic stainless steel weldment , 2003 .

[3]  L. F. Alvarez,et al.  Control of M23C6 carbides in 0.45C–13Cr martensitic stainless steel by means of three representative heat treatment parameters , 1998 .

[4]  Tapan Kumar Pal,et al.  Weld procedural effect on the performance of iron based hardfacing deposits on cast iron substrate , 2006 .

[5]  Sunil Pandey,et al.  Effect of Auxiliary Preheating of the Filler Wire on Quality of Gas Metal Arc Stainless Steel Claddings , 2008 .

[6]  C. Li,et al.  Corrosion properties of plasma nitrided AISI 410 martensitic stainless steel in 3.5% NaCl and 1% HCl aqueous solutions , 2006 .

[7]  C. S. Chiou,et al.  Phase transformation in AISI 410 stainless steel , 2002 .

[8]  P. D Bilmes,et al.  Characteristics and effects of austenite resulting from tempering of 13Cr–NiMo martensitic steel weld metals , 2001 .

[9]  A. D’Oliveira,et al.  Pulsed current plasma transferred arc hardfacing , 2006 .

[10]  J. Aoh,et al.  On the wear characteristics of cobalt-based hardfacing layer after thermal fatigue and oxidation , 2001 .

[11]  Abdul-Ghani Olabi,et al.  Effects of the stress-relief conditions on a martensite stainless-steel welded component , 1998 .

[12]  F. Walther,et al.  Friction and rolling–sliding wear of DC-pulsed plasma nitrided AISI 410 martensitic stainless steel , 2006 .

[13]  Oh-Yang Kwon,et al.  Microstructure and wear property of Fe–Mn–Cr–Mo–V alloy cladding by submerged arc welding , 2004 .

[14]  David Gandy,et al.  Weld Repair of Steam Turbine Casings and Piping—An Industry Survey , 2001 .

[15]  T. G. Gooch.  Heat treatment of welded 13%Cr-4%Ni martensitic stainless steels for sour service , 1995 .