In service embrittlement of cast 20Cr32Ni1Nb components used in steam reformer applications

被引：27

作者：

Knowles, DM

Thomas, CW

Keen, DJ

Chen, QZ

机构：

[1] Mat Performance Technol, Lower Hutt, New Zealand

[2] Plant Reliabil Solut, Carina, Qld 4152, Australia

[3] Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China

来源：

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 2004年 / 81卷 / 06期

关键词：

embrittlement; creep-fatigue;

D O I：

10.1016/j.ijpvp.2003.12.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Severe embrittlement has been experienced in a number of cast manifold components. This has manifested itself as cracking at tee to manifold connections. Attempts to weld repair proved futile leading to concern about the integrity of the entire system. This experience contrasts with similar components that have successfully remained in service for many years. The paper describes the investigations into these failures and laboratory investigations into the properties of cast 20Cr32Ni 1 Nb alloys. Results indicate that variations in alloy chemistry within the stated allowable range are sufficient to cause embrittlement. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：499 / 506

页数：8