Application of Niobium in Quenched and Tempered High-Strength Steels

Klaus Hulka; A. Kern; U. Schriever

doi:10.4028/www.scientific.net/MSF.500-501.519

Paper Titles

Effect of Heat Treatment and Microalloying on Toughness of Cast Low Carbon Steel
p.489

Mechanical Properties of Low-Temperature Bainite
p.495

Improvement of Low Carbon Steel Properties through V-N Microalloying
p.503

The Unique Features of Reinforcing Steel Microalloyed with Nitrogen and Vanadium
p.511

Application of Niobium in Quenched and Tempered High-Strength Steels
p.519

Influence of Composition and Processing Conditions on Mechanical Properties and Fish-Scale Resistance of Microalloyed Steels for Double-Face Vitreous Enamelling
p.527

Processing Low and Ultra-Low Carbon Bainitic Steels with Excellent Property Combinations
p.535

Thermomechanically Hot Rolled High and Ultra High Strength Steel Grades - Processing, Properties and Application
p.543

Development of Low Carbon Microalloyed Ultra High Strength Steels
p.551

HomeMaterials Science ForumMaterials Science Forum Vols. 500-501Application of Niobium in Quenched and Tempered...

Application of Niobium in Quenched and Tempered High-Strength Steels

Abstract:

This article offers an overview on the ways and means of the application of Nb in quenched and tempered high-strength steel plates. Thereby, the outstanding role of Nb to control the austenite microstructure during rolling or heat treatment and to contribute to effective precipitation hardening is discussed. It is shown, that Nb is very effective to retard the transformation processes during quenching. For high-strength constructional steels with up to 1100 MPa yield strength and for wear resistant steels, the improvement in strength and toughness properties in Nb microalloyed steels as compared to Nb-free steels is pointed out. A remarkable effect is the improvement in toughness and brittle fracture resistance due to a very fine microstructure and finely dispersed Nb carbonitrides in a martensitic microstructure. Fields of application for the new Nb microalloyed high-strength structural steels are presented too.

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Periodical:

Materials Science Forum (Volumes 500-501)

Pages:

519-526

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.500-501.519

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Online since:

November 2005

Authors:

Klaus Hulka, A. Kern, U. Schriever

Keywords:

Heavy Plates, High Strength Steel (HSS), Light-Weight Construction, Mechanical Property, Niobium, Wear Resistance, Welding

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