Tribological Characteristics of Coarse and Ultra-Fine Grained Ferrite-Martensite Dual Phase Steel Fabricated by Equal Channel Angular Pressing

2007 ◽  
Vol 124-126 ◽  
pp. 1389-1392 ◽  
Author(s):  
Yong Suk Kim ◽  
Hyun Seok Yu ◽  
Dong Hyuk Shin
Keyword(s):  
Dual Phase Steel ◽  
Sliding Friction ◽  
High Strength ◽  
Ferrite Matrix ◽  
Bearing Steel ◽  
Dual Phase ◽  
Tribochemical Reaction ◽  
Wear Characteristics ◽  
Wear Rates ◽  
Fine Grained

The dual phase steel, which consists of hard martensite islands embedded in a ductile ferrite matrix, is known to possess high strength, toughness, and superior wear resistance. However, the detailed wear mechanism of the steel has not yet been understood thoroughly. In the present study, dry sliding friction and wear characteristics of an ultra-fine grained ferrite-martensite dual phase steel has been investigated at room temperature. Wear tests of the steel were carried out using a pin-on-disk wear tester against an AISI 52100 bearing steel ball at loads ranging from 1N to 10N. Normalizing heat treatment was also performed on the steel to produce a ferrite-pearlite microstructure, and the wear characteristics of the normalized specimen were compared with that of the dual phase steel. The dual phase steel exhibited lower wear rates than the normalized steel, but the steady-state friction coefficients of the two steels were similar. The wear of the dual phase steel proceeded with a tribochemical reaction on the wearing surface accompanied with subsurface strain hardening, which explained the lower wear rate of the steel.

scholarly journals Effect of Carbon Content on V-bending in High-Strength TRIP-aided Dual-Phase Steel Sheets with Polygonal Ferrite Matrix

2020 ◽  
Vol 106 (12) ◽  
pp. 934-943
Author(s):  
Akihiko Nagasaka ◽  
Tomohiko Hojo ◽  
Masaya Fujita ◽  
Takumi Ohashi ◽  
Mako Miyasaka ◽  
...  
Keyword(s):  
Carbon Content ◽  
Dual Phase Steel ◽  
High Strength ◽  
Ferrite Matrix ◽  
Polygonal Ferrite ◽  
Dual Phase ◽  
Steel Sheets

On the Practice of the Microstructure Adjustment to Improve the Strength-Plastic Comprehensive Performance of a C-Si-Mn Alloyed High-Strength Steel

2013 ◽  
Vol 631-632 ◽  
pp. 467-471
Author(s):  
Shuang Kuang ◽  
Guo Sen Zhu ◽  
Ying Hua Jiang
Keyword(s):  
Tensile Strength ◽  
Trip Steel ◽  
Dual Phase Steel ◽  
High Strength ◽  
Residual Austenite ◽  
Ferrite Matrix ◽  
Continuous Annealing ◽  
Dual Phase ◽  
Metastable Austenite ◽  
Multi Phase

Four continuous annealing cycles were adopted to get four kinds of multi-phase steels using 0.2C-1.5Si-1.8Mn [wt%] alloyed raw steel and the microstructures and mechanical properties were investigated. The results show that traditional ferrite-martensite dual phase steel has a tensile strength of more than 1000MPa, but has the lowest strength-plastic product of only 18GPa%. The traditional ferrite, bainite and residual austenite TRIP steel has the highest elongation of 31% and hardening exponent of 0.24, but its tensile strength is just over 800MPa. Introducing hard matrix such as acicular bainitc ferrite or martensite to replace the polygonal ferrite matrix, meanwhile introducing metastable austenite, is conducive to obtain high strength and good ductility. Those kinds of modified TRIP steel with hard matrix can reach above 20GPa% of the strength-plastic product on the 1000MPa grade.

scholarly journals Effects of Silicon and Manganese Contents on V-Bending in High-Strength TRIP-Aided Dual-Phase Steel Sheets with Polygonal Ferrite Matrix

2021 ◽  
Vol 61 (6) ◽  
pp. 1980-1989
Author(s):  
Akihiko Nagasaka ◽  
Tomohiko Hojo ◽  
Masaya Fujita ◽  
Takumi Ohashi ◽  
Mako Miyasaka ◽  
...  
Keyword(s):  
Dual Phase Steel ◽  
High Strength ◽  
Ferrite Matrix ◽  
Polygonal Ferrite ◽  
Dual Phase ◽  
Steel Sheets

scholarly journals Effect of Carbon Content on V-Bending in High-Strength TRIP-Aided Dual-Phase Steel Sheets with Polygonal Ferrite Matrix

2021 ◽  
Vol 61 (2) ◽  
pp. 608-616
Author(s):  
Akihiko Nagasaka ◽  
Tomohiko Hojo ◽  
Masaya Fujita ◽  
Takumi Ohashi ◽  
Mako Miyasaka ◽  
...  
Keyword(s):  
Carbon Content ◽  
Dual Phase Steel ◽  
High Strength ◽  
Ferrite Matrix ◽  
Polygonal Ferrite ◽  
Dual Phase ◽  
Steel Sheets

scholarly journals Effects of Si and Mn Contents on V-bending in High Strength TRIP-aided Dual-Phase Steel Sheets with Polygonal Ferrite Matrix

2021 ◽  
Vol 107 (2) ◽  
pp. 154-164
Author(s):  
Akihiko Nagasaka ◽  
Tomohiko Hojo ◽  
Masaya Fujita ◽  
Takumi Ohashi ◽  
Mako Miyasaka ◽  
...  
Keyword(s):  
Dual Phase Steel ◽  
High Strength ◽  
Ferrite Matrix ◽  
Polygonal Ferrite ◽  
Dual Phase ◽  
Steel Sheets

scholarly journals Effect of Martensite Morphologies on Corrosion in 5% H2SO4 Solution of Borided X70 Dual Phase Steel

2021 ◽  
Vol 45 (1) ◽  
pp. 69-74
Author(s):  
Tassi Hocine ◽  
Zidelmel Sami ◽  
Allaoui Omar
Keyword(s):  
Corrosion Resistance ◽  
Dual Phase Steel ◽  
Annealing Temperature ◽  
Intercritical Annealing ◽  
Ferrite Matrix ◽  
Dual Phase ◽  
H2so4 Solution ◽  
Dp Steel ◽  
Direct Quenching ◽  
Step Quenching

In the present investigation, some electrochemical properties of dual phase X70 steels with different martensite morphologies which have undergone boriding were studied. To obtain a variety of martensite morphologies, Direct Quenching (DQ), Intermediate Quenching (IQ) and Step Quenching (SQ) heat treatments were applied at an intercritical annealing temperature (IAT) of 760℃. The treatment (DQ) allowed the formation of fine martensite evenly distributed in the ferrite matrix. (IQ) treatment showed the formation of martensite along the ferrite / ferrite grain boundaries. In contrast, treatment (SQ) induced the formation of a banded morphology of martensite and ferrite. The realization of borides on X70 (DP) steel was carried out in a powder mixture containing 5% of B4C as source of boron, 5% of NaBF4 as activator and 90% of SiC as diluent at 950℃ for a period of time from 4 h. The corrosion behavior of X70 (DP) steel has been explored by the Tafel extrapolation method in a 5 wt. % H2SO4 solution. The corrosion resistance of steel which has undergone boriding (BDP) is higher than that of steel which has not undergone it (DP).

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