Paper Title:
Low-Pressure Injection Molding Processing of AISI T15 High Speed Steel Powders
  Abstract

Low-pressure powder injection molding was used to obtain AISI T15 high speed steel parts. The binders used were based on paraffin wax, low density polyethylene and stearic acid. The metals powders were characterized in terms of morphology, particle size distribution. The mixture was injected in the shape of square bar specimens to evaluate the performance of the injection in the green state, and then sintered. The samples were injected under the pressures of 0.4, 0.5 and 0.7MPa and at temperatures varying from 110 to 150°C aiming the optimization of the process. The results of the variation of injection pressure were evaluated by measuring the density of the green parts. Debinding was carried out in two steps: first, the molded part was immersed in heptane to remove the major component of the binder and then heated to remove the remaining binder. A second step debinding and sintering were performed in a single step. This procedure shortened considerably the debinding and sintering time.

  Info
Periodical
Materials Science Forum (Volumes 514-516)
Edited by
Paula Maria Vilarinho
Pages
569-573
DOI
10.4028/www.scientific.net/MSF.514-516.569
Citation
J. F. Liberati, O. O. Araujo Filho, W. A. Monteiro, I. M. Esposito, R. A. Nogueira, F. Ambrozio Filho, "Low-Pressure Injection Molding Processing of AISI T15 High Speed Steel Powders", Materials Science Forum, Vols. 514-516, pp. 569-573, 2006
Online since
May 2006
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Price
$32.00
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