Paper Title:
Long-Term Thermal Degradation of Mn-V Steel (W. Nr. 1.1133)
  Abstract

This paper summarizes the achieved results of microstructure analysis and mechanical testing of long-term degradation of Mn-V steel (W. Nr. 1.1133, ČSN 41 3123) frequently used in small and middle boiler pressure systems operating under creep conditions. In these systems, non-exchangeable components often limit a safety of their service operation. Therefore in view of the monitoring, non-destructive methods like replica technique, hardness testing and defectoscopy, and probabilistic approach to residual life assessment seems to be the only way how to quantitatively determine a residual life of the boiler pressure system. Achieved results of as-exposed and as-secondary aged Mn-V steel confirmed that besides NDT controlling of sheet welds due to possible cracks, the replica technique (on available component surface) accompanied by hardness measurement on each segment of weldment should be sufficient for residual life assessment of thick-walled components of boiler pressure system operating under creep conditions. Additionally as a very rough estimate, a value of limit hardness of steel for safety operation is estimated at about 150 HV.

  Info
Periodical
Edited by
Pavel Šandera
Pages
499-502
DOI
10.4028/www.scientific.net/KEM.465.499
Citation
M. Svobodová, L. Horvath, J. Douda, J. Shejbal, E. Svobodová, "Long-Term Thermal Degradation of Mn-V Steel (W. Nr. 1.1133)", Key Engineering Materials, Vol. 465, pp. 499-502, 2011
Online since
January 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hong Fei Sun, Can Ming Wang, Qiang Song, Qiong Qiong Yan
Abstract:Abrasion mechanism of thermocouple cannula is studied in this article. For different working position and condition, different material...
1765
Authors: Zainul Huda
Abstract:This paper presents a case study of ASME SA213 type-T22 alloy steel superheater tube that failed in a boiler of a power plant. The failed...
467
Authors: Xin Wei Zheng, Zheng Li, Hao Wang, Xiu Hui Chen, Dong Yang Zhang, Xue You Wen
Chapter 21: Nontraditional Manufacturing
Abstract:The radial temperature difference calculation of a steam drum shell is an important step in the process of calcu-lating its heat stress, so...
5496
Authors: Dong Yang, Xue Ting Liu, Cong Ju Zhang, Xiao Xiao Zhang
Chapter 8: Waste Disposal and Recycling
Abstract:It is analyzed in the paper that the production and composition of waste gas, such blowing gas, associated in the chemical production of the...
3535
Authors: Rui Zhu, Jian Xing Ren
Chapter 15: CAD/CAM/CAE/CIM
Abstract:Boiler failure is the main power plant boiler operation fault. And boiler superheater tube is one of the important reasons for boiler...
2139