• CN:11-2187/TH
  • ISSN:0577-6686

›› 1997, Vol. 33 ›› Issue (6): 33-37.

• 论文 • 上一篇    下一篇

淬火温度对铬钨合金白口铸铁热疲劳行为的影响

刘北兴;吴晓玲;何世禹;李健   

  1. 哈尔滨工业大学材料系;机械工业部机械科学研究院
  • 发布日期:1997-11-01

EFFECT OF QUENCHING TEMPERATURE ON THERMAL FATIGUE BEHAVIOUR OF CHROME-TUNGSTEN ALLOY WHITE CAST IRON

Liu Beixing;Wu Xiaoling;He Shiyu;Li Jian   

  1. Research Institute of Machinery Science, MMI Harbin Institute of Technology
  • Published:1997-11-01

摘要: 用自约束试验方法研究了铬钨合金白求恩口铸铁的热疲劳抗力,用透射电镜观察了热循环前后材料组织的变化,在扫描电镜上观察了热疲劳断口。结果表明:在热循环过程中材料的基体组织发生回复和再结晶,产生循环软化;适当提高淬火温度可以提高热疲劳抗力,但淬火温度过高,反而使热疲劳抗力降低。

关键词: 白口铸铁, 淬火温度, 热疲劳

Abstract: The thermal fatigue resistance of chrome-tungsten alloy white cast iron is studied by Belt-constraint. The changes of microstructure before and after thermal cycling are observed by TEM. The fracture of thermal fatigue is also observed by SEM. The results demonstrate that the matrix microstructure of materials tested occurs dynamic recovery and recrystallization and generate cyclic softening in the process of thermal cycling. The resistance to thermal fatigue is property improved by raising quenching temperature. However, excessive quenching temperature may lower thermal fatigue resistance.

Key words: Quenching temperature, Thermal fatigue, White cast iron

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