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首页> 外文会议>International Conference on Microalloying for New Steel Processes and Applications; 20050907-09; Basque Country(ES) >Application of Niobium in Quenched and Tempered High-Strength Steels
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Application of Niobium in Quenched and Tempered High-Strength Steels

机译：铌在调质高强度钢中的应用

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摘要

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.
机译：本文概述了在淬火和回火高强度钢板中应用Nb的方式和方法。因此，讨论了Nb在轧制或热处理过程中控制奥氏体微结构并有助于有效的沉淀硬化的突出作用。结果表明，Nb对延缓淬火过程中的转变过程非常有效。对于高达1100 MPa屈服强度的高强度建筑钢和耐磨钢，指出了与不含Nb的钢相比，Nb微合金钢的强度和韧性性能得到了改善。显着的效果是由于非常精细的微观结构和马氏体微观结构中弥散分布的Nb碳氮化物，从而提高了韧性和抗脆性断裂性能。还介绍了新型Nb微合金高强度结构钢的应用领域。

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