Formation mechanism of CuNiAl-rich multi-structured precipitation and its effect on mechanical properties for ultra-high strength low carbon steel obtained via direct quenching and tempering process

2021 ◽  
pp. 142567
Author(s):  
Wen Fu ◽  
Chengning Li ◽  
Ran Duan ◽  
Heshan Gao ◽  
Xinjie Di ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Formation Mechanism ◽  
Low Carbon Steel ◽  
High Strength ◽  
Low Carbon ◽  
Direct Quenching ◽  
Quenching And Tempering ◽  
Tempering Process

scholarly journals Impact of Cold-Rolling and Heat Treatment on Mechanical Properties of Dual-Phase Treated Low Carbon Steel

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Le Van Long ◽  
Dinh Van Hien ◽  
Nguyen Truong Thanh ◽  
Nguyen Chi Tho ◽  
Van Thom Do
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
High Strength ◽  
Processing Parameters ◽  
Dual Phase ◽  
Low Carbon ◽  
Forming Process ◽  
Good Ductility ◽  
Rolling Deformation

The low carbon steel has good ductility that is favorable for forming process, but its low strength leads to limiting their application for forced structures. This paper studied improving strength of low-carbon steel via rolling deformation and dual-phase treatment. The results showed that the dual-phase treated steel had a combination of high strength and good ductility; its tensile ultimate strength reached 740 MPa with elongation at fracture of over 15%, while that of the cold-rolled steel only reached 700 MPa with elongation at fracture of under 3%. Based on the obtained results, relationships between mechanical properties and dual-phase processing parameters were established to help users choose suitable-processing parameters according to requirements of products.

Heat Treatment Conditions of Low Carbon Steel Part Used in the Deep Sea

2010 ◽  
Author(s):  
Sang-Seop Lim ◽  
Chung-Gil Kang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Carbon Steel ◽  
Deep Sea ◽  
Low Carbon Steel ◽  
High Strength ◽  
Steel Part ◽  
Heat Treatment Condition ◽  
Low Carbon ◽  
Oil Consumption

With increasing oil consumption, we have to find more oil resources in the deep sea. The extreme working condition of the deep sea requires high toughness and high strength values at low temperatures. Academic institutions limited the chemical composition of the requested casting steel to meet their requirements of fracture toughness and weldability. Thus, the carbon content was set approximately 0.10% based on classification societies which required specific mechanical properties of strength, elongation, reduction area and impact energy (−40°C). In this study, we find the optimal heat treatment condition of low carbon steel (0.10%C) to obtain the desired mechanical properties at low temperature (−40°C) according to different quenching parameters (heating times) and tempering parameters (heating temperatures, cooling methods).

Study of Direct Quenching and Tempering Process of a Low Carbon Equivalent 960 MPa Grade Steel

2013 ◽  
Vol 744 ◽  
pp. 329-333
Author(s):  
Feng Lu ◽  
Chao Wang ◽  
Yuan Yuan Li ◽  
Long Lu ◽  
Zhao Dong Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lath Martensite ◽  
Controlled Rolling ◽  
Carbon Equivalent ◽  
Low Carbon ◽  
Tempering Temperature ◽  
Experimental Steel ◽  
Direct Quenching ◽  
Quenching And Tempering ◽  
Tempering Process

The chemical composition of a 960 Mpa grade high strength steel with low carbon equivalent was designed. Effect of direct quenching and tempering process on the microstructure and mechanical properties of the experimental steel was studied. Results showed that fine lath martensite was obtained after controlled rolling and direct quenching. With tempering temperature increasing, the mechanical properties showed different trends for different tempering stages. And this had a direct relationship with the microstructure evolution. The matrix recovery softening, carbon desolution and precipitation of nanomicroalloy carbides influenced the strength change. With increase of tempering time, the strength decreased and toughness improved. Experimental steel tempered at 450 °C for 40min could obtain the best mechanical properties, which meet the requirement with a large impact energy margin.

scholarly journals The influence of post-deformation annealing temperature on the mechanical properties of low-carbon ferritic steel deformed by the DRECE method

2021 ◽  
Vol 39 (3) ◽  
pp. 430-435
Author(s):  
Karolina Kowalczyk
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Low Temperature ◽  
Low Carbon Steel ◽  
High Strength ◽  
Low Carbon ◽  
Initial State ◽  
Low Temperature Annealing ◽  
Steel Strips ◽  
Scanning Transmission

Abstract The paper presents observations on the mechanical properties characterizing low-carbon steel subjected to deformation by the dual rolls equal channel extrusion (DRECE) method and annealed for 60 min in different temperature variants in the range of 450–700°C. The DRECE process was carried out up to seven passes at ambient temperature. The investigations carried out revealed that the strength of the steel strips increases corresponding to the rise in the number of DRECE passes applied. The yield strength (YS) after seven passes is >2.5 times higher compared to the material in the initial state (before the deformation process). However, the tensile ductility decreased significantly after the DRECE. In order to obtain favorable mechanical properties, the steel strips were subjected to annealing. Our study demonstrates that after being processed by the DRECE method, low-carbon steel can be subjected to low-temperature annealing to ensure that it is endowed with high strength, while maintaining the characteristic good ductility of the material. The results of the research were analyzed in the context of an investigation into the microstructure change, assessed by scanning transmission electron microscopy (STEM), induced in low-carbon steel subjected to the DRECE process and low-temperature annealing.

scholarly journals Structure and Physical-Mechanical Properties of High-Strength Low-Carbon Steel Alform 620M under Simulate of Welding Thermal Cycles

2020 ◽  
Vol 42 (8) ◽  
pp. 1119-1134
Author(s):  
G. M. Hryhorenko ◽  
◽  
V. D. Pozniakov ◽  
O. M. Berdnikova ◽  
T. O. Alekseienko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
High Strength ◽  
Low Carbon ◽  
Thermal Cycles
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