Evaluation of post weld heat treatment quality of modified 9Cr-1Mo (P91) steel weld by magnetic coercive force measurements

被引：5
|
作者：
Sudharsanam, V. [1 ]
Senthilkumar, V. [2 ]
Raju, N. [1 ]
Vetriselvan, R. [1 ]
机构：
[1] Bharat Heavy Elect Ltd, Welding Res Inst, High Pressure Boiler Plant, Tiruchirappalli 620014, Tamil Nadu, India
[2] Natl Inst Technol, Dept Prod Engn, Tiruchirappalli 620015, Tamil Nadu, India
来源：
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING | 2015年 / 15卷 / 04期
关键词：
Magnetic coercive force; Modified 9Cr-1Mo steel; Post weld heat treatment; Precipitates; Hardness; MECHANICAL-PROPERTIES; MICROSTRUCTURE; STRENGTH;
D O I：
10.1016/j.acme.2015.05.006
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper presents a novel technique for evaluation of quality of post weld heat treatment (PWHT) of modified 9Cr-1Mo (P91) steel weld by correlation with its magnetic coercive force (MCF). The MCF of modified 9Cr-1Mo steel was studied in respect of different PWHT cycles involving ordered variations of soaking temperature unto 770 degrees C and soaking time unto 140 min. It was observed that MCF of the weld metal reduced with increase in both the soaking temperature and soaking time of PWHT. The drop in MCF of welds after PWHT was found to be dependent on the drop in the hardness of the weld and on the degree of carbide precipitations seen in the weld microstructure. Based on the study, a criterion was evolved for evaluation of heat treatment quality of the weld. (C) 2015 Politechnika Wrodawska. Published by Elsevier Sp. z o.o. All rights reserved.
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页码：847 / 853
页数：7
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