Effect of heat treatment on microstructures of flow formed C-250 maraging steel

I. K. Lee, C. P. Chou, C. M. Cheng, I. C. Kuo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The technique of forward flow forming has been used to produce a long thin walled tube of C-250 maraging steel. Forward flow forming can conserve material, increase strength and reduce production process time. Since the hardness of solution treated C-250, using flow forming, can be increased by approximately 16·2%, flow formed tube must be given an additional aging treatment to increase hardness and strength. Direct aging treatment yields low elongation, which is not suited to design requirements. Using a homogenisation treatment, the microstructure of C-250 was of coarse grained lath type on aging and of needle type after solution treatment and aging. These treatments resulted in low tensile strength, and tensile fracture showed a tendency to brittleness. A 'solution + aging' treatment yielded greater strength and elongation.

Original languageEnglish
Pages (from-to)1595-1602
Number of pages8
JournalMaterials Science and Technology
Volume19
Issue number11
DOIs
Publication statusPublished - 2003 Nov 1

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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