V2EX austempering

Austempering

定义 Definition

austempering(等温淬火):一种热处理工艺。将钢或铸铁先奥氏体化(加热到形成奥氏体的温度),随后迅速冷却到中温盐浴/油浴中并等温保持,使组织转变为贝氏体(钢中常见)或奥贝球铁/贝氏体型球铁(ADI)等,从而在较小变形与开裂风险下获得较好的强韧性组合。

发音 Pronunciation (IPA)

/stmpr/

例句 Examples

Austempering can improve toughness without excessive distortion.
等温淬火可以在不过度变形的情况下提高韧性。

After austenitizing, the parts were austempered in a salt bath to produce a bainitic microstructure with good strength and fatigue resistance.
在奥氏体化之后,这些零件在盐浴中进行等温淬火,以获得贝氏体组织,从而兼具较高强度与抗疲劳性能。

词源 Etymology

austemperingaustenite(奥氏体)tempering(回火) 组合而来。该名称强调工艺与“奥氏体”转变路径相关,并在中温区进行等温保持;虽然字面含有 tempering,但其核心并非传统“淬火后回火”的两步法,而是通过等温转变直接获得目标组织(如氏体/ADI相关组织)。

相关词 Related Words

文献与作品 Literary / Notable Works

  • ASM Handbook, Volume 4: Heat Treating(ASM International)
  • Steels: Heat Treatment and Processing Principles(George E. Totten 等)
  • Bainite in Steels(H. K. D. H. Bhadeshia)
  • Ductile Iron Data for Design Engineers(如 Keith D. Millis / Ductile Iron Society 相关资料中常见 ADI 与 austempering 讨论)
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