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Article
Prospects for Producing Special Cold-Resistant Economically Alloyed Nickel Ferritic Steel for Liquefied Natural Gas Storage and Transportation Vessels
Ferritic steels are developed economically alloyed with nickel (up to 7%) with increased strength and low-temperature toughness for the manufacture of liquefied natural gas (LNG) storage tanks. Results are pro...
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Article
Steels for Bridge Structures
We consider domestic and foreign standards for rolled metals used in bridge building. Domestic standards contain elevated requirements to the reliability of rolled metals in terms of their fracture resistance ...
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Article
Comparison of Weldability of High-Strength Pipe Steels Microalloyed with Niobium, Niobium and Vanadium
Weldability is studied for two high-strength pipe steels of strength class K60 with different microalloying based on modelling physical processes occurring in heat-affected zone (HAZ) metal, and correlation of...
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Article
Use of Accelerated Cooling During Thermomechanical Rolling for Economically Alloyed Steel of Strength Class K60 (X70)
The requirement is investigated for microalloying steel of strength class K60 with vanadium using thermomechanical rolling technology followed by accelerated cooling from the point of view of changing rolled p...
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Article
Effect of deformation regime in main stages of controlled rolling on pipe steel microstructure
The effect of controlled rolling deformation regimes on features of hot-deformed austenite structure formation and the final microstructure of low-carbon microalloyed pipe steel is studied. The effect of metho...
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Article
Effectiveness of one-, two-, and three-cell Steckel mills in the thermomechanical treatment of microalloyed steel
On a Gleeble physical-modeling system, the influence of one-, two-, and three-time reduction on the grain size and maximum flow stress of low-carbon microalloyed steel is studied. In the light of the productio...
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Article
Development of Alloying and Controlled Rolling Parameters Providing the Required Level of Mechanical Properties and Cold Resistance for Pipe Steel of Strength Class K60 in a Ural Steel 2800 Mill
On the basis of studying the effect of chemical composition, controlled rolling temperature and deformation parameters, and accelerated cooling parameters, technology is developed for manufacturing pipe steel ...
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Article
More effective thermomechanical treatment of microalloyed pipe steel
Attention focuses on how the basic hot-deformation parameters in thermomechanical treatment affect the structure formation of hot-deformed austenite, the microstructure, and the mechanical properties of low-ca...
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Article
Study of microstructure and properties of ultrahigh-strength pipe steel of strength category x120 prepared under laboratory conditions
Experimental melting is carried out at the Bardin TsNIIchermet research complex for smelting steel of strength category X120 of two chemical composition versions: microalloyed with and without boron. Thermomec...
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Article
Development of economically alloyed structural steel of strength classes 345 and 390
Structural steels used in the production of welded metal structures in contemporary domestic and overseas practice are analyzed. Common tendencies and differences from strength classes used most frequently are...
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Article
Effect of semifinished rolled product cooling rate during controlled rolling on the condition of microalloyed steel hot-worked austenite, final microstructure, and mechanical properties. Part 2. Study of the effect of semifinished rolled product cooling rate on ferrite-bainite structure formation*
The effect of cooling rate is studied under laboratory conditions for semifinished rolled product in a temperature range of the order of 1000–850°C using controlled rolling technology on the condition of hot-w...
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Article
Influence of rolling temperature on the austenite structure and properties of low-carbon microalloyed steel
In laboratory conditions, the influence of the temperature interval in the finishing stage of controlled rolling on the structure of hot-deformed austenite, the final microstructure, and the properties of low-...
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Article
Relationship of failure energy and amount of ductile component in a fracture during the DWTT for rolled plate prepared by controlled rolling
Typical features and the difference in specimen fractures are described for rolled plate DWTT specimens manufactured by controlled rolling technology with final deformation in the two-phase γ+α-region, or cont...
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Article
Effect of semifinished rolled product cooling rate during controlled rolling on the condition of microalloyed steel hot-worked austenite, final microstructure, and mechanical properties. Part 1. Study of the Effect of Semifinished Rolled Product Cooling Rate on Ferrite-Pearlite Microstructure Formation
The effect of cooling rate is studied under laboratory conditions for semifinished rolled product in a temperature range of the order of 1000–850°C using controlled rolling technology on the condition of hotwo...
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Article
Assimilation of production in an MMK 5000 mill of thick rolled sheet from low-alloy steels with improved strength and cold resistance properties
Results are presented for development and introduction into production in a new MMK 5000 mill for thick rolled sheet from low-alloy steels with increased strength properties (σy ≥ 500 N/mm2 and σy ≥ 570 N/mm2), i...
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Article
Thermomechanical treatment of microalloyed low-carbon steel at a 5000 mill for the production of cold-resistant thick strip
A production technology for K60 steel strip suited to the production of gas-line pipe (diameter 1420 mm; wall thickness 26.4 mm) has been developed, along with the corresponding chemical composition of the ste...
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Article
Optimizing drop tests of high-ductility pipe steel
Methodological aspects of drop tests for high-ductility pipe steel are discussed. The basic advantages and disadvantages of various methods of assessing the test results are noted. Recommendations are made for...
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Article
Influence of controlled rolling on the structure and mechanical properties of low-carbon microalloy steel
The influence of the temperature and deformation in the finishing stage of rolling on the structure and properties of low-carbon microalloy steel is investigated. The microstructure and mechanical characterist...
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Article
Effect of controlled rolling regimes on the structure and properties of microalloyed steels for large diameter pipes
The effect of CR parameters on the structural state of hot-worked austenite before the start of γ →α transformation, and also on the final microstructure and set of mechanical properties of low-carbon microall...
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Article
Improvement in steel weldability for large diameter thick-walled gas pipelines by optimizing chemical composition
The problem is considered of improving impact strength and brittle failure resistance of heat-affected zone (HAZ) metal during welding of thick-walled (30–40 mm) gas pipelines. It is shown that the best HAZ pr...
