Effect of direct quenching on microstructure and mechanical properties of copper-bearing high-strength alloy steels

1998 ◽  
Vol 252 (2) ◽  
pp. 256-268 ◽  
Author(s):  
Guen Chul Hwang ◽  
Sunghak Lee ◽  
Jang Yong Yoo ◽  
Wung Yong Choo
Keyword(s):  
Mechanical Properties ◽  
High Strength ◽  
Direct Quenching ◽  
Microstructure And Mechanical Properties ◽  
Alloy Steels ◽  
Strength Alloy

Comparision of Direct Quenching and Reheat Quenching Process on Microstructure and Mechanical Properties of a High Strength Steel

2011 ◽  
Vol 287-290 ◽  
pp. 805-809
Author(s):  
Zheng Tao Duan ◽  
Yan Mei Li ◽  
Fu Xian Zhu
Keyword(s):  
Mechanical Properties ◽  
Rolling Direction ◽  
High Strength ◽  
Direct Quenching ◽  
Microstructure And Mechanical Properties ◽  
Quenching Process ◽  
Austenite Grains ◽  
Equiaxed Grains ◽  
Quenching And Tempering ◽  
Reheat Quenching

The effects of direct quenching and tempering (DQ-T) process and conventional reheat quenching and tempering (RQ-T) processes on the microstructure and mechanical properties of a high strength low alloy steel were investigated. In the as-quenched DQ steel, prior austenite grains are elongated parallel to the rolling direction, whereas the as-quenched RQ steel mainly consists of equiaxed grains; The DQ process was found to enhance the hardenability of steel effectively. The tensile strength and yield strength of DQ specimen, were higher than that of RQ specimen. In contrast, low temperature toughness of DQ-T specimen was generally inferior to that of RQ-T specimen.

scholarly journals Microstructure and Mechanical Properties of Dual-Phase Steel/ Mikrostruktura I Własności Mechaniczne Stali Dwufazowej

2014 ◽  
Vol 59 (4) ◽  
pp. 1257-1261
Author(s):  
K. Miernik ◽  
S. Pytel
Keyword(s):  
Mechanical Properties ◽  
Dual Phase Steel ◽  
High Strength ◽  
Phase Region ◽  
Dual Phase ◽  
Two Phase ◽  
Dp Steel ◽  
Direct Quenching ◽  
Microstructure And Mechanical Properties ◽  
Tempering Treatment

Abstract The paper presents results of microstructure and mechanical properties of the dual phase (DP) steel plate with 12 mm thickness produced by intercritical annealing at a two-phase region of ferrite and austenite (α + γ) and direct quenching in water. In addition the tempering treatment at temperature of 650°C was applied to investigate effect of martensite softening on mechanical properties of the tested steel. The parameters of heat treatment were designed to achieve the high strength while retaining optimum impact strength of the DP steel.

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

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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