Enhancement of impact toughness of structural steels upon formation of carbide-free bainite

被引：7

作者：

Kaletin, A. Yu. ^{[1
]}

Ryzhkov, A. G. ^{[2
]}

Kaletina, Yu. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia

[2] Yeltsin Ural Fed Univ, Ekaterinburg 620002, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2015年 / 116卷 / 01期

关键词：

bainitic steels; continuous cooling; carbide-free bainite; retained austenite; strength; impact toughness;

D O I：

10.1134/S0031918X15010068

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Mechanical properties of chromium-nickel-molybdenum steels with the carbon contents of 0.1 to 0.4% after slow continuous cooling in the bainitic range have been determined, and the structure has been investigated. It has been shown that, at a carbon content of about 0.10-0.15% and upon additional alloying with silicon and aluminum after such a heat treatment, in steels, the structure of carbide-free bainite is formed and a substantial enhancement in the impact toughness is observed compared to bainite containing carbide precipitates. The enhancement in the level of toughness is related to the presence in carbide-free bainite of an appreciable amount of retained austenite enriched with carbon.

引用

页码：109 / 114

页数：6

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