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

• Autorzy: Sudharsanam, V. , Senthilkumar, V. , Raju, N. , Vetriselvan, R.
• Języki publikacji: EN

Abstrakty

EN

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 °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.

Słowa kluczowe

PL

obróbka cieplna; stal; spawanie

EN

magnetic coercive force; modified 9Cr–1Mo steel; post weld heat treatment; precipitates; hardness

• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2015
• Tom: Vol. 15, no. 4
• Strony: 847--853
• Opis fizyczny: Bibliogr. 22 poz., rys., tab., wykr.

Twórcy

autor

Sudharsanam, V.

• Welding Research Institute, High Pressure Boiler Plant, Bharat Heavy Electricals Limited, Tiruchirappalli, Tamilnadu 620014, India,

autor

Senthilkumar, V.

• Department of Production Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu 620015, India

autor

Raju, N.

• Welding Research Institute, High Pressure Boiler Plant, Bharat Heavy Electricals Limited, Tiruchirappalli, Tamilnadu 620014, India

autor

Vetriselvan, R.

• Welding Research Institute, High Pressure Boiler Plant, Bharat Heavy Electricals Limited, Tiruchirappalli, Tamilnadu 620014, India

Bibliografia

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Identyfikatory

DOI

10.1016/j.acme.2015.05.006