Effect of Ultrasonic and Argon-Blowing Treatment on the Nitrogen Content in Low Carbon Steel

The processing method for introducing an ultrasonic wave probe directly inserted into the molten steel was used. Effect of ultrasonic and argon-blowing on the nitrogen content in low carbon steel was carried out. The results showed that with the ultrasonic treatment separately, the nitrogen content in the molten steel reduced, but the removal rate was relatively lower with about 3.13~9.04 %. Using the argon-blowing agitation separately, the removal rate of nitrogen in the steel was relatively higher with about 6.89~32.68 %. With the increase of argon flow rate and prolong of the treatment time, the removal rate of nitrogen in the molten steel trended to increase at first, and then reduce.

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Influence of Ultrasonic Wave, Argon Blowing and its Coordinated Treatment on the Nitrogen Content in Low Carbon Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.402.841 ◽

2011 ◽

Vol 402 ◽

pp. 841-845

Author(s):

Jie Li ◽

Ling Li ◽

Qi Xuan Rui ◽

Jian Jun Wang ◽

Hai Chuan Wang

Keyword(s):

Carbon Steel ◽

Nitrogen Content ◽

Ultrasonic Wave ◽

Nitrogen Removal ◽

Molten Steel ◽

Ultrasonic Treatment ◽

Removal Rate ◽

Low Carbon Steel ◽

Low Carbon

Influence of ultrasonic wave, argon blowing agitating and their coordinated treatment on nitrogen content in low carbon steel was mainly studied. Results showed that ultrasonic wave, argon blowing or their coordinated treatment can all reduce the nitrogen content in low carbon molten steel. While treated with ultrasonic wave separately, removal rate of the nitrogen in molten steel is relatively low with 3.13%~9.04%. Using the argon blowing agitating separately, removal rate of the nitrogen in molten steel is relatively high with 6.89%~32.68%, when the argon blowing flow is 0.5 l/min, removal rate of nitrogen is 32.68%. The nitrogen removal effect of the ultrasonic wave-argon blowing agitating coordinated treatment is considerably improved than that of separately ultrasonic treatment. While 300 W ultrasonic wave and 0.5l/min argon blowing agitating cooperatively treatment on the low carbon molten steel, the removal rate of nitrogen is 26.95%.

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Kinetic Study of the Growth of Hard Layers on a Low Carbon Steel

MRS Advances ◽

10.1557/adv.2017.517 ◽

2017 ◽

Vol 2 (50) ◽

pp. 2809-2817

Author(s):

Daniel S. Huerta ◽

E.D. García Bustos ◽

D.V. Melo Máximo ◽

M. Flores Martinez

Keyword(s):

Carbon Steel ◽

Treatment Time ◽

Low Carbon Steel ◽

Thermochemical Treatment ◽

Low Carbon ◽

X Ray Diffraction ◽

Kinetic Growth ◽

Steel Aisi ◽

Growth Constants ◽

Substrate Hardness

ABSTRACTIn the present work the kinetic growth is analyzed for a hard coating applied on a low carbon steel AISI 8620. A thermochemical treatment of bored with dehydrated paste at temperatures of 900, 950 and 1000 °C with a residence time of 2, 4, 6 and 8 h. The morphology and types of borides formed on the surface of the steel were evaluated by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The layer formed has a size of 20 to 113 μm which will be dependent on the process temperature, the treatment time and the alloy elements of the substrate. Hardness of 1493-1852 HV are presented for treatment times and temperatures established in this study. The kinetics of growth were determined and analyzed using a mathematical model of diffusion, evaluating the penetration of the biphasic layer that is determined as a function of the time and temperature of the thermochemical treatment (TCT). The results show the increase in the growth constants (k) with respect to the bored temperatures. The activity energy (Q) of the material AISI 8620 was also obtained.

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Improvement of Low Carbon Steel Properties through V-N Microalloying

Materials Science Forum ◽

10.4028/www.scientific.net/msf.500-501.503 ◽

2005 ◽

Vol 500-501 ◽

pp. 503-510 ◽

Cited By ~ 2

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.

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Effect of Nitrogen Content on Recrystallization Textures of Extra-Low-Carbon Steel Sheet

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.64.14_2158 ◽

1978 ◽

Vol 64 (14) ◽

pp. 2158-2166 ◽

Cited By ~ 2

Author(s):

Masashi TAKAHASHI ◽

Atsuki OKAMOTO

Keyword(s):

Carbon Steel ◽

Nitrogen Content ◽

Steel Sheet ◽

Low Carbon Steel ◽

Low Carbon ◽

Carbon Steel Sheet

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Novel boriding technique of low-carbon steel weldments

Journal of Physics Conference Series ◽

10.1088/1742-6596/2128/1/012032 ◽

2021 ◽

Vol 2128 (1) ◽

pp. 012032

Author(s):

Ahmed M. A. Eldarwesh ◽

Amany Khaled ◽

Tarek M. Moussa ◽

Mostafa R. A. Atia

Keyword(s):

Carbon Steel ◽

Treatment Time ◽

Low Carbon Steel ◽

Carbon Steels ◽

Process Time ◽

Treatment Technique ◽

Low Carbon ◽

Depth Of Penetration ◽

Main Research ◽

Boriding Process

Abstract Boriding is considered one of the essential surface treatments for carbon steels during the last decades. The conventional methods of boriding are subjected to many limitations due to the sophisticated setup and the time-consuming treatment. Therefore, less complex methods and less time consumption are the main research objectives past couple of years. This research suggests an enhanced boriding surface treatment technique for low carbon steel. The advantages of the proposed method include the reduction of boriding process time through the development of new boron rich compounds which consequently eliminates the need of specially designed furnaces. The illustrated outputs reveal promising results without sacrificing the physical properties. The proposed technique was carried out experimentally. Depth of penetration and microhardness were measured and compared with results from previous literature. Some trials have shown 35 µm depth of penetration of boron layer at 30 min treatment time associated with micro-hardness up to 2388 HV.

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