Modified heat treatment for lower temperature improvement of the mechanical properties of two ultrahigh strength low alloy steels

Apparently, defects caused by failures in mechanical characteristics do not have a significant weight, but at a closer analysis it is noted that there are many lamination programs in which the thermal heat treatment is needed. These defects are generally not a reason for rejecting the plates, but annealing leads to increased specific consumption.

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Study on Spheroidization and Related Heat Treatments of Medium Carbon Alloy Steels

MATEC Web of Conferences ◽

10.1051/matecconf/201814402008 ◽

2018 ◽

Vol 144 ◽

pp. 02008 ◽

Cited By ~ 2

Author(s):

S. R. Harisha ◽

Sathyashankara Sharma ◽

U. Achutha Kini ◽

M. C. Gowri Shankar

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Manganese Content ◽

Heat Treatments ◽

Carbon Steels ◽

Low Alloy Steels ◽

Low Carbon ◽

Medium Carbon ◽

Medium Carbon Steels ◽

Alloy Steels

The importance of medium carbon steels as engineering materials is reflected by the fact that out of the vast majority of engineering grade ferrous alloys available and used in the market today, a large proportion of them are from the family of medium carbon steels. Typically medium carbon steels have a carbon range of 0.25 to 0.65% by weight, and a manganese content ranging from 0.060 to 1.65% by weight. Medium carbon steels are more resistive to cutting, welding and forming as compared to low carbon steels. From the last two decades a number of research scholars reported the use of verity of heat treatments to tailor the properties of medium carbon steels. Spheroidizing is the novel industrial heat treatment employed to improve formability and machinability of medium/high carbon low alloy steels. This exclusive study covers procedure, the effects and possible outcomes of various heat treatments on medium carbon steels. In the present work, other related heat treatments like annealing and special treatments for property alterations which serve as pretreatments for spheroidizing are also reviewed. Medium carbon steels with property alterations by various heat treatment processes are finding increased responsiveness in transportation, aerospace, space, underwater along with other variegated fields. Improved tribological and mechanical properties consisting of impact resistance, stiffness, abrasion and strength are the main reasons for the increased attention of these steels in various industries. In the present scenario for the consolidation of important aspects of various heat treatments and effects on mechanical properties of medium carbons steel, a review of different research papers has been attempted. This review may be used as a guide to provide practical data for heat treatment industry, especially as a tool to enhance workability and tool life.

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Effect of Thermomechanical Treatment (TMT) on Hardness, Impact Toughness of Different Grades of Low Alloy Steels

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1101.212 ◽

2015 ◽

Vol 1101 ◽

pp. 212-216

Author(s):

Mahmoud M. Tash ◽

Saleh A. Alkahtani ◽

Khaled A. Abuhasel

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Impact Toughness ◽

Mechanical Treatment ◽

Weight Ratio ◽

High Strength ◽

Extensive Study ◽

Low Alloy Steels ◽

Alloy Steels ◽

Thermo Mechanical Treatment

The present study was undertaken to investigate the effect of thermo-mechanical treatment (TMT) on the mechanical behaviour of different grades of low alloy steels. The effect of hot forming (rolling) with different reduction ratios on the hardness and impact toughness properties will be studied. Correlations between different thermo-mechanical treatment parameters, hardness and impact toughness for different grades of low alloy steels were carried out. Different grades of Low alloy steels were selected for the present study. An extensive study will be carried out to investigate the effect of alloying additions and TMT parameters on the hardness and impact toughness of heat-treated low alloy steels. An understanding of the combined effect of TMT and heat treatment on the mechanical properties of the low alloy steels would help in selecting conditions required to achieve optimum mechanical properties and alloy high strength to weight ratio. The scope of the present work is therefore to study the effects of hot rolling reduction ratios on microstructure and mechanical properties of such alloys. By measuring hardness, impact toughness, strength and ductility resulting from different heat treatment following TMT, it is possible to determine which conditions yielded optimum mechanical properties and high strength to weight ratio.

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Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100074896 ◽

1983 ◽

Vol 41 ◽

pp. 220-221

Author(s):

L.J. Chen ◽

H.C. Cheng ◽

J.R. Gong ◽

J.G. Yang

Keyword(s):

Mechanical Properties ◽

Cooling Rate ◽

Automobile Industry ◽

High Strength ◽

Weight Percent ◽

Low Alloy Steels ◽

Dual Phase ◽

Resource Requirement ◽

Alloy Steels ◽

Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

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