Design of Composition in (Al/Si)-alloyed TRIP Steels
スポンサーリンク
概要
- 論文の詳細を見る
There is an increasing interest in the progressive substitution of Si by Al in TRIP steels in order to obtain alloys with excellent mechanical properties and improved coatability. In this paper, thermodynamic calculations have been carried out with the help of JMatProTM software in order to assess and compare the effects that Si and Al additions exert on the phase transformation, carbon enrichment and alloying element content of phases during continuous galvanizing of multiphase steels. These simulations have provided important implications regarding the optimal combination of Si and Al. It has been found that Al causes a more pronounced increase of A3 temperature and a wider extension of the intercritical range than Si. For a constant volume fraction of phases, the carbon content in austenite is similar for Al and Si-alloyed steels. However, ferrite in Al-alloyed is richer in carbon and consequently an increase in its strength could be expected. The hardenability of intercritically annealed austenite has been estimated for alloys with different combinations of Mn, Al and Si. Finally, simulated CCT diagrams predict for Al-alloyed steels a higher amount of new ferrite formed during cooling from intercritical annealing and the need of shorter isothermal holding times at 460°C. However, Si-TRIP steels would need faster cooling rates to prevent pearlite formation and longer isothermal holding times to complete the bainitic transformation and to obtain a microstructure with high retained austenite.
著者
-
Gomez Manuel
BAMPRI, University of Pittsburgh
-
Garcia C.
Basic Metals Processing Research Institute (BAMPRI), Mechanical Engineering and Materials Science De
-
Haezebrouck Dennis
United States Steel Corporation, Research and Technology Center
-
Deardo Anthony
Basic Metals Processing Research Institute (BAMPRI), Mechanical Engineering and Materials Science De
関連論文
- Design of Composition in (Al/Si)-alloyed TRIP Steels
- Image Quality Analysis : A New Method of Characterizing Microstructures
- The Segregation Behavior of Phosphorus in Ti and Ti+Nb Stabilized Interstitial-Free Steels
- Microstructure and Precipitation Behavior of Nb, Ti Complex Microalloyed Steel Produced by Compact Strip Processing
- Evolution of Texture in Ferritically Hot Rolled Ti and Ti+Nb Alloyed ULC Steels during Cold Rolling and Annealing
- Effect of Chemical Composition and Thermomechanical Processing on Texture in Hot Bands of Ti and Ti+Nb Containing Ultra-low Carbon Steels
- Identification of Ti-S-C-containing Multi-phase Precipitates in Ultra-Iow Carbon Steels by Analytical Electron Microscopy
- The Role of New Ferrite on Retained Austenite Stabilization in Al-TRIP Steels
- Design of Composition in (Al/Si)-alloyed TRIP Steels
- Intragranular Nucleation of Ferrite on Precipitates and Grain Refinement in a Hot Deformed V-microalloyed Steel
- Influence of Accumulated Stress in Austenite on Transformed Ferrite Grain Size by Hot Rolling for a V-microalloyed Steel
- Simplification of Hot Rolling Schedule in Ti-Microalloyed Steels with Optimised Ti/N Ratio
- Effect of Aluminum Content on the Mechanical Properties of Dual Stabilized Ti-Nb Interstitial Free High Strength Steel (IF-HSS)
- Application of Grain Boundary Engineering in Lead-free "Green Steel"