Precipitation of NbC and Effect of Mn on the Strength Properties of Hot Strip HSLA Low Carbon Steel

1998 ◽  
Vol 284-286 ◽  
pp. 311-318 ◽  
Author(s):  
V. Thillou ◽  
M. Hua ◽  
C. Isaac Garcia ◽  
C. Perdrix ◽  
Anthony J. DeArdo
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Strength Properties ◽  
Low Carbon ◽  
Hot Strip

Improvement of Low Carbon Steel Properties through V-N Microalloying

2005 ◽  
Vol 500-501 ◽  
pp. 503-510 ◽  
Author(s):  
Ibrahim Hamed M. Ali ◽  
Ibrahim M. Moustafa ◽  
Ahmed Mohamed Farid ◽  
R.J. Glodowski
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Nitrogen Content ◽  
Low Carbon Steel ◽  
Nitrogen Addition ◽  
Strength Properties ◽  
Vanadium Content ◽  
Low Carbon ◽  
Steel Properties ◽  
Low Solubility

To improve the strength properties of vanadium bearing low carbon steel, nitrogen is often added to the liquid steel. The source of the nitrogen addition can be in many different forms. The recovery of nitrogen from the addition is variable due to the low solubility of nitrogen in steel. In this work, nitrogen-enriched alloy (Nitrovan) was added under open atmosphere. To deduce the nitrogen role, two alloys were chosen that having the same vanadium content. One of them was Ferro-Vanadium as a source of vanadium, whereas Nitro-Vanadium used as a source of vanadium and nitrogen. Ferro-vanadium as well as Nitro-vanadium was added separately in the ladle after completely melting of carbon steel and proper superheat using 100 Kg induction furnace. The effect of adding nitrogen-enriched alloy on mechanical properties of the steel was investigated. For this purpose, four heats were produced and cast into sand moulds. The general trend of results shows higher mechanical properties through increasing nitrogen content. The experimental work indicates that enhanced nitrogen content promotes the precipitation of V(C,N) and decreases the particles size of V(C,N) precipitates. Also, under the same level of vanadium content, the tensile strength and yield strength of the nitrogen-enhanced steels increases consistently compared to the steels added 80% Ferro-Vanadium. An empirical formula, correlating the mechanical properties of the steel and its composition, was obtained.

scholarly journals Computer modeling of microstructural change and strength of low carbon steel in hot strip rolling.

1987 ◽  
Vol 27 (6) ◽  
pp. 439-445 ◽  
Author(s):  
Masayoshi SUEHIRO ◽  
Kazuaki SATO ◽  
Yasushi TSUKANO ◽  
Hiroshi YADA ◽  
Takehide SENUMA ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Computer Modeling ◽  
Low Carbon Steel ◽  
Microstructural Change ◽  
Low Carbon ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Hot Strip

Effect of Electrolytic-Plasma Carbonitriding on Structure and Microhardness of Low Carbon Steel 18CrNi3Mo

2013 ◽  
Vol 379 ◽  
pp. 101-104
Author(s):  
Mazhyn Skakov ◽  
Lyaila Bayatanova ◽  
Michael Sсheffler
Keyword(s):  
Carbon Steel ◽  
Structure Formation ◽  
Layer Structure ◽  
Low Carbon Steel ◽  
Steel Sample ◽  
Strength Properties ◽  
Low Carbon ◽  
Gradient Layer ◽  
Modified Layer

In this paper modified gradient layer was under research, the resulting electrolytic-plasma carbonitriding of low carbon steel 18CrNi3Mo surface was investigated. Aiming to improve the structure and strength properties of the layer, the possibility of application have been shown. Plasma carbonitriding optimized mode is presented as well. Regime of electrolyte plasma carbonitriding which consists in heating the steel sample to 8500C with aggregate exposure at this temperature for 3-7 min. and quenching in cold electrolyte has been optimized. We studied the processes of modified layer structure formation under different conditions

scholarly journals The study of the microstructure and mechanical properties of low carbon steel, microalloying by boron

2019 ◽  
Vol 57 (1) ◽  
pp. 143-148
Author(s):  
Anatoly A. Babenko ◽  
◽  
Natalia I. Selmensky ◽  
Alena G. Upolovnikova ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Nonmetallic Inclusions ◽  
Volume Fraction ◽  
Low Carbon Steel ◽  
Strength Properties ◽  
Rolled Steel ◽  
Low Carbon ◽  
Bainite Structure ◽  
Temporary Resistance

The paper presents the results of the study of non-metallic inclusions, the structure and mechanical properties of low carbon steel, microalloying by boron. The study of the amount and composition of nonmetallic inclusions showed that with the introduction of boron the volume fraction of oxide and oxysulfide inclusions increases and the volume fraction of sulfide inclusions significantly decreases. At the same time, the alloying of steel with boron increases to 99.7% the proportion of inclusions with a size of no more than 5 microns against 80.6% in the metal without boron. In the metal with boron, nonmetallic inclusions larger than 10 μm are absent, while in the metal without boron their share is 13.6%. Studies have shown that in a metal containing 0.011% boron, independent boron-containing inclusions were not detected. Boron was not detected in the composition of the studied nonmetallic inclusions. In all samples, steel nonmetallic inclusions are represented mainly by oxide, oxysulfide and sulfide inclusions. In the boron-free steel, a small amount of perlite is present along with the ferritic phase. Steel microalloying by boron is accompanied by the formation of a dispersed ferrite-bainite structure, which consists of fine-grained ferrite with bainite sites with a tendency to form bainite strips along the rolling direction. The microhardness of ferrite and perlite in steel without boron does not exceed an average of 180 and 214 HV10, respectively. It is noted that the presence of boron in steel in an amount of 0.011% increases the microhardness of ferrite to 260 HV10 and bainite to 335 HV10. The mechanical properties of hot-rolled steel with a thickness of 10 mm from boron-containing low-alloyed steel, due to the predominant formation of small rounded inclusions with a size of no more than 5 microns and the formation of a fine ferrite-bainite structure, are characterized by enhanced strength properties with preservation of plastic characteristics. The absolute values of the yield strength and temporary resistance of steel with boron reach 575 and 650 MPa, respectively. With such strength properties of metal, high plastic characteristics are preserved. Rolled steel without boron is characterized by reduced to 540 and 610 MPa tensile strength and temporary resistance, respectively.

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