Effect of different post weld heat treatments (PWHT) on Electron beam welded AISI 5137 steels

Tuesday, October 24, 2017: 11:40 AM
A223-225 (Greater Columbus Convention Center)
Mr. Valmik Bhavar , Bharat forge Ltd. Pune, India, Pune, India
Mr. Prakash Kattire , Bharat Forge Ltd., Pune, India
Mr. sandeep Thakare , Bharat Forge Ltd., Pune, India
Mr. Santosh mane , Bharat Forge Ltd., Pune, India
Sachin Patil , Bharat Forge Ltd., Pune, India
Mr. Vinayak Pawar , Bharat Forge Ltd., Pune, India
Dr. RKP Singh , Bharat forge ltd., Pune, India
Though electron beam welding (EBW) causes minimum destruction to the base metal, significantly different microstructure exists at weld zone. Rapid heating and cooling during electron beam welding results in dendritic microstructure, which lowers mechanical properties. In order to recover the original mechanical properties, post weld heat treatments (PWHT) needs to be performed after EBW.

This paper presents effect of different PWHT’s on mechanical and microstructural properties of electron beam welded SAE 5137 H steel. Welded steel plates were processed through different heat treatments like stress relieving, normalizing and hardening & tempering. Micro-hardness testing, microstructural analysis and impact testing were performed to characterize these specimens. It was perceived that, different PWHT’s can be employed and selection depends on final mechanical property requirement from the weld joint.