Features of Fracture and Fatigue Durability of the Maintained Steel of Disks of the Steam Turbine of Thermal Power Station

被引：0
|
作者：
Tkachuk, Yu. M. [1 ]
Student, O. Z.
机构：
[1] Lutsk Natl Tech Univ, UA-43018 Lutsk, Ukraine
来源：
METALLOFIZIKA I NOVEISHIE TEKHNOLOGII | 2011年 / 33卷
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D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
As shown, the regulated values of mechanical properties under tension of the 34XH3M steel after operation during at congruent to 3.10(5) h as a disk of steam turbine is not satisfied that indicates on the steel degradation. As revealed, using fractography analysis, the nucleation of crack in the damaged disk of steam turbine appears by the mechanism of fretting fatigue due to low-amplitude displacements of blade roots into the disk groove, and its subsequent extension takes place by the mechanism of corrosion-fatigue crack growth. The characteristics of the high-cycle, corrosion and fretting fatigues of steels in a virgin state and after operation are compared. Salient features of fractures of such steels are revealed.
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页码：449 / 460
页数：12
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