Solidification Behavior of Duplex Stainless Steel (UNS S32205) Welds as a Function of WRC–1992 Diagram Equivalents and Cooling Rate

2019 ◽  
Vol 52 (2) ◽  
pp. 65
Author(s):  
Purvesh K. Nanavati ◽  
Sanjay N. Soman
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cooling Rate ◽  
Solidification Behavior

Effect of Different Cooling Rate on HAZ Microstructure of 2205 Duplex Stainless Steels

2009 ◽  
Author(s):  
Qingren Xiong ◽  
Yaorong Feng ◽  
Wenzhen Zhao ◽  
Chunyong Huo ◽  
Chuan Liu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cooling Rate ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Temperature Range ◽  
2205 Duplex Stainless Steel ◽  
Microstructure Transformation ◽  
Microstructure Morphology ◽  
Phase Proportion

The effects of cooling rate ω8/5 and ω12/8 on the simulated HAZ microstructure transformation in 2205 duplex stainless steel are studied in this paper. The results indicate that 1200°C ∼ 800°C is the temperature range in which the microstructure transits the most violently for 2205 steel, and is also the cooling interval, that affects the phase proportion and microstructure morphology the most distinctly. Accordingly, It is more efficient to use ω12/8 as the parameter to investigate the microstructure transformation of welding HAZ microstructure of this material. The cooling rate in this interval will affect the microstructure transformation of HAZ microstructure of 2205 steel remarkably.

The Study on Welding HAZ Microstructure of SAF 2507 Duplex Stainless Steel by Simulation Tests

2014 ◽  
Vol 804 ◽  
pp. 277-280 ◽  
Author(s):  
Ren Long Tao ◽  
Jie Liu ◽  
Guang Wei Fan ◽  
Xu Chang
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cooling Rate ◽  
Significant Influence ◽  
Thermal Simulation ◽  
Cooling Time ◽  
Phase Precipitation ◽  
Σ Phase

Thermal simulation by GLEEBLE3800 is adopted to obtain the simulated welding HAZ microstructures in SAF 2507 duplex stainless steel with the GLEEBLE3800 thermal simulation machine. The simulation peak temperatures are 800oC, 900oC, 950oC, 1000oC, 1050oC and 1100oC, The cooling velocities are t12/8=3.6s, 7s, 20s and 40s (t12/8 is cooling time of 1200oC to 800oC which is used to describe the cooling rate). The results indicate that the peak temperatures have significant influence on the microstructures of austenite and ferrite. At 900oC, the content of σ phase precipitation reaches the maximum, which is distributed mainly in α or at α/γ junction. When the temperature is set above 1050oC, the σ phase disappears. A faster cooling rate passing through 800~1050oC is required to avoid brittle σ phase precipitation.

The effect of cooling rate on the solidification and microstructure evolution in duplex stainless steel

2012 ◽  
Vol 109 (3) ◽  
pp. 1185-1191 ◽  
Author(s):  
Darja Steiner Petrovič ◽  
Miran Pirnat ◽  
Grega Klančnik ◽  
Primož Mrvar ◽  
Jožef Medved
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cooling Rate ◽  
Microstructure Evolution

Centrifugal Casting Practice and Microstructure and Mechanical Properties of a 2205 Duplex Stainless Steel

2005 ◽  
Vol 475-479 ◽  
pp. 2527-2532 ◽  
Author(s):  
Sang Mok Lee ◽  
S. Yang ◽  
S.T. Kim ◽  
Y.S. Park ◽  
B.M. Moon
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cooling Rate ◽  
Centrifugal Casting ◽  
Corrosion Properties ◽  
Σ Phase ◽  
Air Atmosphere ◽  
Treatment Conditions

Microstructural features, mechanical properties, and corrosion properties of a SAF2205 duplex stainless steel (DSS) were systematically investigated as functions of cooling rate during casting and heat treatment conditions. The choice of a duplex stainless steel was a SAF2205 alloy, of which composition is 0.03C, 21~23Cr, 4.5~6.5Ni, 2.5~3.5Mo, 0.08~0.2N, 1.0Si, and 2.0Mn with remaining Fe. A 5-stepped sand mold and the permanent Y-block mold were used to check the effect of cooling rate during solidification. The microstructural characteristics, such as grain size, the d/γ ratio, the existence of the carbides and σ phase has been noticed to greatly change with the variation of cooling rate during the casting procedure. Various heat treatment conditions were also examined to achieve the optimized mechanical properties of DSS. Based on the preliminary examination, the feasibility study of utilization of centrifugal casting has been carried out for the production of better quality DSS pipe components. Melting and casting practices of DSS during centrifugal casting in an air atmosphere were systematically investigated in order to obtain the optimized process parameters.

scholarly journals Effect of Cooling Rate on the Corrosion Behavior of As-Cast SAF 2205 Duplex Stainless Steel After Solution Annealing Treatment

2015 ◽  
Vol 18 (suppl 2) ◽  
pp. 138-142 ◽  
Author(s):  
Maria Eurenice Rocha Cronemberger ◽  
Sandra Nakamatsu ◽  
Carlos Alberto Della Rovere ◽  
Sebastião Elias Kuri ◽  
Neide Aparecida Mariano
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cooling Rate ◽  
Corrosion Behavior ◽  
Annealing Treatment ◽  
Solution Annealing ◽  
2205 Duplex Stainless Steel ◽  
Saf 2205
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