Landolt-Börnstein - Group VIII Advanced Materials and Technologies

Powder Metallurgy Data · Introduction

Abstract

This chapter is an introduction to discussion on the forming process. In many cases the method of giving shape to a mass of powder is decisive for the competitiveness of the process. Opposite to conventional metallurgy where a shape is achieved by melting, casting, hot and cold working and subsequent machining, in powder forming a vast number of methods has evolved, many of them as problem solvers for special applications or niche processes which are operated worldwide only in a single location. The way of forming depends mostly on whether the powder develops green strength under compressive stresses. Powders with green strength after compaction do not need external support for further handling, powders without green strength must be filled in containers for consolidation or in some cases can be kept in shape by binders. There are, however, no dogmatic border lines between the different possibilities, the purpose dictates the method of forming. The product of the shaping step within the production sequence can be a net shape green part, a nearnet shape blank which affords secondary operations after consolidation, a semifinished product or a billet for hot or cold working. The masses handled in forming processes can range from several mg up to 10 mg, extending over ten orders of magnitude.

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Title
Powder Metallurgy Data · Introduction
Book Title
Powder Metallurgy Data
In
3 Forming
Book DOI
10.1007/b88278
Chapter DOI
10.1007/10689123_6
Part of
Landolt-Börnstein - Group VIII Advanced Materials and Technologies
Volume
2A1
Editors
  • P. Beiss Send Email (11)
  • R. Ruthardt Send Email (12)
  • H. Warlimont Send Email (13)
  • Editor Affiliation
  • 11 Professur und Institut für Werkstoffkunde, Rheinisch Westfälische Technische Hochschule (RWTH) Aachen, 52062, Aachen, Germany
  • 12 Aussenstelle Hanau, Deutsche Gesellschaft für Materialkunde e.V., Adalbert-Stifter-Str. 19, 63452, Hanau, Germany
  • 13 Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, 01069, Dresden, Germany
  • Authors
  • P. Beiss Send Email (101)
  • Author Affiliation
  • 101 Professur und Institut für Werkstoffkunde, Rheinisch Westfälische Technische Hochschule (RWTH) Aachen, 52062, Aachen, Germany
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