Retained Austenite and Residual Stress Profiles in a Cold Rolled Dual-Phase Steel, Strip

1989 ◽  
pp. 734-739
Author(s):  
Paolo Matteazzi ◽  
Stefano Martelli
Keyword(s):  
Residual Stress ◽  
Retained Austenite ◽  
Dual Phase Steel ◽  
Steel Strip ◽  
Dual Phase ◽  
Cold Rolled ◽  
Stress Profiles

Effect of Intercritical Annealing Temperature on Development of Cold Rolled Dual Phase Steel from Q345 Steel

2013 ◽  
Vol 313-314 ◽  
pp. 693-696
Author(s):  
Ji Yuan Liu ◽  
Fu Xian Zhu ◽  
Shi Cheng Ma
Keyword(s):  
Dual Phase Steel ◽  
Annealing Temperature ◽  
Simulation Experiment ◽  
Intercritical Annealing ◽  
Continuous Annealing ◽  
Dual Phase ◽  
Automotive Applications ◽  
Treatment Procedure ◽  
Annealing Temperatures ◽  
Cold Rolled

Cold rolled dual phase steel was developed from Q345 steel by heat treatment procedure for automotive applications. The ultimate tensile strength was improved about 100MPa higher than the traditional cold-rolled Q345 steel in the continuous annealing simulation experiment. The microstructure presented varied characteristics in different intercritical annealing temperatures; mechanical properties were changed correspondingly as well. The chief discussions are focus on the recrystallization, hardenability of austenite and martensite transformation in the experiment.

scholarly journals X-Ray Residual Stress and Strain-Induced Transformation of Retained Austenite in TRIP-Aided Dual-Phase Steels.

1995 ◽  
Vol 61 (581) ◽  
pp. 80-86 ◽  
Author(s):  
Koh-Ichi Sugimoto ◽  
Mitsuyuki Kobayashi ◽  
Hidehiro Matsushima ◽  
Shun-ichi Hashimoto
Keyword(s):  
Residual Stress ◽  
Retained Austenite ◽  
Stress And Strain ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
X Ray

scholarly journals Formability Analyses of a Novel Alloy Cold-rolled Batch Annealed Dual Phase Steel

2020 ◽  
Vol 47 ◽  
pp. 1211-1216
Author(s):  
Emin Tamer ◽  
Gulfem Ozgultekin ◽  
Okan Poyraz ◽  
Celal Seyalioglu
Keyword(s):  
Dual Phase Steel ◽  
Dual Phase ◽  
Cold Rolled

Austenite formation during intercritical annealing in C-Mn cold-rolled dual phase steel

2015 ◽  
Vol 22 (4) ◽  
pp. 1203-1211 ◽  
Author(s):  
Sheng-ci Li ◽  
Yong-lin Kang ◽  
Guo-ming Zhu ◽  
Shuang Kuang
Keyword(s):  
Dual Phase Steel ◽  
Intercritical Annealing ◽  
Austenite Formation ◽  
Dual Phase ◽  
Cold Rolled

Effects of overaging temperature on the microstructure and properties of 600 MPa cold-rolled dual-phase steel

2016 ◽  
Vol 23 (8) ◽  
pp. 943-948 ◽  
Author(s):  
Chun-fu Kuang ◽  
Zhi-wang Zheng ◽  
Gong-ting Zhang ◽  
Jun Chang ◽  
Shen-gen Zhang ◽  
...  
Keyword(s):  
Dual Phase Steel ◽  
Dual Phase ◽  
Microstructure And Properties ◽  
Cold Rolled

Development of the 600MPa High Aluminum Galvanized Dual Phase Steel and its Application

2011 ◽  
Vol 228-229 ◽  
pp. 1169-1173
Author(s):  
Hui Wang ◽  
Cheng Jiang Lin ◽  
Zhao Jun Deng ◽  
Peng Yang ◽  
Fei Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Grain Boundaries ◽  
Retained Austenite ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Bake Hardening ◽  
Tem Analysis ◽  
Auto Parts ◽  
High Aluminum

An original 600MPa high aluminum galvanized dual phase steel had been successfully developed in this paper. The microstructure analysis showed that the microstructures of the steel mainly consist of ferrite and 8%~11% martensite as well as 4%~6% retained austenite which distributed around the ferrite grain boundaries. TEM analysis demonstrated that there exists lots of high density dislocation in ferrite, obvious twin-structures in martensite and some retained austenite in the microstructures. The existence of the retained austenite makes some contribution to the higher elongation of the steel. The tensile test showed that the steel delivers an excellent mechanical properties of Rp0.2=350~400MPa,Rm=610~650MPa, A80mm=26%~30%, n=0.17~0.21 and an excellent bake-hardening value of 50~70MPa. Ball-Punch Experiments showed that the galvanizing dual phase steel had a good and satisfying coating adhesion. Owe to the excellent formability, the steel has successfully been used in the production of some auto parts.

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