Structure and ductility of the heat-affected zone of welded joints of a high-strength steel

被引：4
|
作者：
Tabatchikova, T. I. [1 ]
Nosov, A. D. [2 ]
Goncharov, S. N. [2 ]
Gudnev, N. Z. [2 ]
Reina, S. Yu. Delgado [1 ]
Yakovleva, I. L. [1 ]
机构：
[1] Russian Acad Sci, Ural Branch, Inst Met Phys, Ekaterinburg 620990, Russia
[2] OAO Uraltransmash, Ekaterinburg 620027, Russia
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2014年 / 115卷 / 12期
关键词：
heat-affected zone; welded joint; cold cracks; impact toughness;
D O I：
10.1134/S0031918X14120072
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Methods of optical microscopy and scanning and transmission electron microscopy have been used to study the structure of welded joints of a high-strength structural steel with different types of the weld metal. The impact toughness of the heat-affected zone (HAZ) has been determined at temperatures of +20 and -40A degrees C. Based on the fractograph investigations of the character of the fracture of the welded joints after tests for impact bending, the regions that are the most dangerous for crack initiation have been determined. Structural factors that affect the brittleness of the near-weld zone of welded joints with the austenite metal of the weld are indicated, including the existence of an austenite-bainite structure and coarse carbides, as well as the specific distribution of hydrogen.
引用
收藏
页码：1241 / 1248
页数：8
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