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

I. K. Lee, C. P. Chou, Ching-min 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

Fingerprint

maraging steels
Maraging steel
Carbon steel
heat treatment
Aging of materials
Heat treatment
microstructure
Microstructure
Elongation
elongation
Hardness
hardness
tubes
Pipe flow
Brittleness
brittleness
Needles
homogenizing
needles
Tensile strength

ASJC Scopus subject areas

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

Cite this

Effect of heat treatment on microstructures of flow formed C-250 maraging steel. / Lee, I. K.; Chou, C. P.; Cheng, Ching-min; Kuo, I. C.

In: Materials Science and Technology, Vol. 19, No. 11, 01.11.2003, p. 1595-1602.

Research output: Contribution to journalArticle

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