[T2] Compaction & Sintering

[14A-T2-01] Effect of Process Variables on Seamless Fabrication of Iron-Based Powder Metallic Strip via Powder Roll Compactor (PRC) and Its Mechanical Characteristic

*Y. P. Fatangade¹, N. B. Dhokey¹ (1.COEP Technological University, India)

Keywords:Powder roll compactor (PRC), Metallic strip, Sintered density, Mathematical model

While fabricating thin metallic strips as per customer requirements using traditional production techniques, the common processes to be followed are melting, casting, hot rolling, cold rolling, and finishing operations. The objective of this paper focuses on the manufacturing of iron-based powder metallic strips using powder roll compactor (PRC). The powder rolling was performed on iron powder particles size fraction viz. (53 to 150 µm). The selected powder particles fraction was roll compacted with paraffin wax as binder and lubricant of steric acid for the preparation of feedstock. For strip fabrication, a variable back pressure powder feeder hopper, with roll mill dimensions of 100 mm x 62 mm (roll width x roll diameter) was employed. The mathematical model was used to investigate the influence of powder hopper back pressure, and quality of feedstock preparation for the strip's uniform densification. The green strip obtained with a roll compactor undergone further sintering at 1120°C in a nitrogen and hydrogen (9:1) environment to arrive at final mechanical properties. Metallographic characterization of the strip was done with an optical microscope and Image- J software to get the densification repose. Surface response and 2-D contour were acquired to estimate the appropriate densification process factors for sintered roll compacted strips. For the consistent and flawless manufacturing of the strip, a correlation between the process densification parameter has been developed