ROLLED STRIP WITH IMPROVED STRENGTH OF VANADIUM-MICROALLOYED STEEL FOR AUTOMOTIVE APPLICATION / Panfilova Liudmila M.,Smirnov Leonid A. // . - 2008. - V. , l. . - P. 1231-1238.

ISSN/EISSN:

нет данных / нет данных

Type:

Proceedings Paper

Abstract:

The paper is devoted to studying the effect of microalloying with nitrogen (up to 0.02\%) and vanadium, jointly with other nitride-forming elements introduced separately or in complex, on properties of low-carbon (0.05-0.07\%C) manganese-containing (up to 1.3\%) thin rolled steel strip. Based on comprehensive studies and tests, the steel with vanadium (below 0.1\%), aluminum (below 0.01\%) and nitrogen (0.012-0.015\%) being the cheapest microalloying element, has been chosen. The steel was prepared under laboratory conditions in electric-arc furnace using complex modification. It has been established that microalloying resulting in 1.5-2.0 times increased yield strength level compared with standard steel properties both for 4 mm thin strip hot rolling and for 1.5 mm thin strip cold rolling followed by recrystallization annealing, providing acceptable level of elongation, good bending ductility, weldability, corrosion resistance, etc. Efficiency of strengthening with simultaneous plasticity improvement during annealing of cold deformed strip is ensured by processes of recrystallization and strengthening by precipitation of ultra-fine nitride phase that occured at the same time. It has been established that complex microalloying and modification promote development of structure refining as well as reduction of adverse influence of impurities segregation on grain boundaries and refinement of non-metallic inclusions in turn making it possible to increase the brittle failure resistance and to reduce a risk of occurrence of localized stress ``peaks{''} in the structure of steel. High level of mechanical properties of hot-rolled and cold-rolled thin strip ensured by refined structure, development of fine sub-structure having high density of ultra-fine nano-sized nitrides precipitating during cooling after hot rolling and during recrystallization annealing at 600 degrees C and high steel cleanliness of non-metallic inclusions and adverse impurities enable. The given level of properties makes it possible to use the same high-strength steel grade for manufacturing different automotive parts allowing vehicle weight reduction and improvement of safety and maintainability.

Author keywords:

Low-carbon steel; Microalloyed V and N properties; Hot-rolled and cold-rolled steel sheet

DOI:

нет данных

Web of Science ID:

ISI:000263677000103

Соавторы в МНС:

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Другие поля

Поле	Значение
Book-Group-Author	TMS
Booktitle	NEW DEVELOPMENTS ON METALLURGY AND APPLICATIONS OF HIGH STRENGTH STEELS: BUENOS AIRES 2008, VOLS 1 AND 2, PROCEEDINGS,
Note	Conference on New Developments on Metallurgy and Applications of High Strength Steels, Buenos Aires, ARGENTINA, MAY 26-28, 2008
Organization	Ternium; Tenaris; SAM; AIM; TMS; ABM
Publisher	MINERALS, METALS \& MATERIALS SOC
Address	184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA
Language	English
ISBN	978-0-87339-729-2
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	uim@ural.ru
ResearcherID-Numbers	Smirnov, Leonid/T-8402-2017
Number-of-Cited-References	7
Usage-Count-Since-2013	1
Doc-Delivery-Number	BIY11