低温退火温度对Laves相Cr2Nb固相热反应合成的影响

Effects of Annealing Temperature on Laves Phase Cr2Nb Synthesizing by Solid Phase Thermal Reaction

摘要:

研究了退火时间为3h时，退火温度对Cr-Nb机械合金化（MA）粉的Laves相Cr2Nb固相热反应合成的影响规律，获得了30hMA粉在退火时间为3h时能使Laves相Cr2Nb固相热反应合成充分进行的最低退火温度。优化出的cr2Nb固相热反应合成低温退火温度，可为通过MA＋热压（或烧结）工艺路线制备具有微／纳米晶结构的高强高韧Cr2Nb合金或Cr2Nb基复合材料提供理论指导。

Abstract:

Using Cr-Nb MA powders ball milled for 30 h then annealed for 3 h, the effects of annealing temperature on Laves phase Cr2Nb synthesizing by solid phase thermal reaction have been investigated. The lowest annealing temperature of the powder for full synthesizing of Laves phase Cr2Nb was obtained. The optimized low temperature annealing parameters for Laves phase Cr2Nb synthesizing by solid phase thermal reaction can theoretically provide guidance for preparing both high strength and high tough Cr2Nb alloy or Cr2Nb-based composite with micro- / nano-grains by a process of mechanical alloying followed by a hot pressing or sintering.