Effect of Heat Treatment on the Microstructure of Duplex Stainless Steel

Abstract

The aim of this paper is to research the influence of a different heat treatment of duplex austenitic-ferritic stainless steel to a microstructure. First, the initial data for numerical simulation were obtained by tensile test. Numerical simulation serves to determine the state of the workpiece during open die forging. The second stage focused on the evaluation of the microstructure in state after dwell time at forging temperature (7-and 10-hour) and cooling (water, air). Metallographic analysis observed the influence on precipitation of secondary phase especially.

Microstructure and Dry Friction of 2205 Dual‐Phase Steel during Solution Precipitation

“…e existence of austenite can greatly reduce the brittleness of the ferrite and also improve the weldability of the material. Ferrite improves the resistance of the material to stress corrosion, and because of the simultaneous existence of these two phases, it can also inhibit grain growth [8][9][10][11][12][13]. However, the presence of these two phases also brings some disadvantages.…”

Effect of Solution Treatment on Microstructure and Mechanical Properties of 2205 Duplex Stainless Steel

“…Duplex stainless steels have good resistance to stress-corrosion cracking in environments containing higher concentration of chlorides. However, problems occur in environments where atomic hydrogen forms [6].…”

“…But the additions of such alloying elements come with unavoidable disadvantages; the most important of them being the microstructural instability of the material. During operation or use the duplex stainless steels are frequently exposed to high temperatures and thus, are exposed to different intermetallic phase precipitation [6], [9]- [11]. The most common intermetallic phases found in duplex stainless steel are sigma (σ), chi (χ) and laves phases.…”