Improvement of strength and toughness for hot rolled low-carbon bainitic steel via grain refinement and crystallographic texture

2016 ◽  
Vol 175 ◽  
pp. 157-160 ◽  
Author(s):  
Jian Kang ◽  
Cheng-ning Li ◽  
Guo Yuan ◽  
Guo-dong Wang
Keyword(s):  
Grain Refinement ◽  
Crystallographic Texture ◽  
Bainitic Steel ◽  
Low Carbon ◽  
Hot Rolled ◽  
Strength And Toughness

Mechanical properties and hot-rolled microstructures of a low carbon bainitic steel with Cu–P alloying

2011 ◽  
Vol 528 (21) ◽  
pp. 6401-6406 ◽  
Author(s):  
W.F. Cui ◽  
S.X. Zhang ◽  
Y. Jiang ◽  
J. Dong ◽  
C.M. Liu
Keyword(s):  
Mechanical Properties ◽  
Bainitic Steel ◽  
Low Carbon ◽  
Hot Rolled

scholarly journals Rational Alloy Design of Niobium-Bearing HSLA Steels

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 413
Author(s):  
Rami A. Almatani ◽  
Anthony J. DeArdo
Keyword(s):  
Grain Refinement ◽  
Controlled Rolling ◽  
Coarse Grained ◽  
Low Carbon ◽  
Hsla Steels ◽  
Finish Rolling ◽  
Basic Studies ◽  
Linepipe Steels ◽  
Rough Rolling ◽  
Strength And Toughness

In the 61 years that niobium has been used in commercial steels, it has proven to be beneficial via several properties, such as strength and toughness. Over this time, numerous studies have been performed and papers published showing that both the strength and toughness can be improved with higher Nb additions. Earlier studies have verified this trend for steels containing up to about 0.04 wt.% Nb. Basic studies have shown that the addition of Nb increases the recrystallization-stop temperature, T5% or Tnr. These same studies have shown that with up to about 0.05 wt.% of Nb, the T5% temperature increases in the range of finish rolling, which is the basis of controlled rolling. These studies also have shown that at very high Nb levels, exceeding approximately 0.06 wt.% Nb, the recrystallization-stop temperature or T5% can increase into the temperature range of rough rolling, and this could result in insufficient grain refinement and recrystallization during rough rolling. However, the question remains as to how much Nb can be added before the detriments outweigh the benefits. While the benefits are easily observed and discussed, the detriments are not. These detriments at high Nb levels include cost, undissolved Nb particles, weldability issues, higher mill loads and roll wear and the lessening of grain refinement that might otherwise occur during plate rough rolling. This loss of grain refinement is important, since coarse grained microstructures often result in failure in the drop weight tear testing of the plate and pipe. The purpose of this paper is to discuss the practical limits of Nb microalloying in controlled rolled low carbon linepipe steels of gauges ranging from 12 to 25 mm in thickness.

Effect of Aging Temperature on the Microstructure and Mechanical Properties of 1000MPa Grade Low Carbon Bainitic Steel

2012 ◽  
Vol 152-154 ◽  
pp. 376-380 ◽  
Author(s):  
Long Fei Zuo ◽  
Zhan Lei Wei ◽  
Ri Ni ◽  
Ben Ma ◽  
Zi Dong Wang
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Yield Strength ◽  
Aging Temperature ◽  
Granular Bainite ◽  
Bainitic Steel ◽  
Low Carbon ◽  
Microstructure And Mechanical Properties ◽  
Effect On Yield ◽  
Hot Rolled

A kind of 1000MPa low carbon bainitic steel belonged to the Fe-Cu-Nb series was hot rolled and aged, the influence of aging temperatures on the microstructure and mechanical properties of the steel were investigated by using Scanning electron microscopy (SEM) and transmission electron microscopy(TEM). The results show that the microstructure of the low carbon bainitic steel consisted of lath-shaped bainite(LB), granular bainite(GB) and quasi-polygonal ferrite(QF), and the proportion of each kind of microstructure changed with the aging temperatures. The strength of steel with the increase of aging temperature first increased, then decreased, Aging temperatures had distinct effect on yield strength of the tested steel, and less effect on the ultimate tensile strength, we can get the best comprehensive properties yield strength 1011.87 MPa and elongation rate 16.38% of good tough match aged at 450°C. Through analysis it is concluded that the strength of the tested steels aged at 450°C reaches the maximum value, which is attributed to the precipitation of a large amount of fine ε-Cu particles(5~10nm) and a small number of(Nb,Ti)(C,N) precipitates.

Development of trimming technology for hot rolled ultra-low carbon steel

1993 ◽  
Vol 90 (7-8) ◽  
pp. 917-922
Author(s):  
Y. Matsuda ◽  
M. Nishino ◽  
J. Ikeda
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Ultra Low Carbon Steel ◽  
Hot Rolled

AISI 1015

Alloy Digest ◽  
1972 ◽  
Vol 21 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Heat Treating ◽  
General Purpose ◽  
Low Carbon ◽  
Steel Mills ◽  
Cold Worked ◽  
Hot Rolled ◽  
Good Workability

Abstract AISI 1015 is a low-carbon steel used in the annealed, cold-worked, hot-rolled or normalized condition for general purpose construction and engineering. It is also used for case-hardened components. It combines good machinability, good workability and good weldability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-48. Producer or source: Carbon steel mills.

UNS G81150

Alloy Digest ◽  
1990 ◽  
Vol 39 (11) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Alloy Steel ◽  
Heat Treating ◽  
Low Carbon ◽  
Wear Resistant ◽  
Nickel Chromium ◽  
Steel Mills ◽  
Medium Strength ◽  
Strength And Toughness

Abstract UNS G 81150 is a low-carbon nickel-chromium-molybdenum carburizing steel recommended for applications where a core of medium strength and toughness combined with a wear-resistant carburized case is sufficient. It has medium hardenability and can be used without carburizing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-453. Producer or source: Alloy steel mills and foundries.

Sign in / Sign up

Export Citation Format

Share Document