碳化钨钢结硬质合金渗硼层热疲劳特性的研究  

STUDY ON THE THERMAL FATIGUE PROPERTIES OF BORONIZED LAYER ON STEEL-BONDED CARBIDE

作　　者：尤显卿[1] 游兴河[1] 刘圣明[1] 

机构地区：[1]合肥工业大学

出　　处：《硬质合金》1994年第2期65-70,共6页Cemented Carbides

摘　　要：本文对GJW50碳化钨钢结硬质含金进行了粉末渗硼处理，在自约束型热疲劳试验机上进行了25－680℃的效疲劳试验．用光学显微镜和扫描电镜观察了在突变热应力的作用下，热疲劳裂纹在渗硼层萌生、扩展的全过程．试验结果为表面硬化处理在碳化钨钢结硬质含金热作模具上的应用提供了理论依据．Powder boriding of GJW50 Steel-bonded carbide has been made,thermal fatigue testing at 25-680℃ is Conducted on inhouse developed thermal fatigue tester. All process of crack initintion and prologation for thermal fatigue under the action of alternation thermal stress is observed by OM and SEM. Theory basis is offerd by test results for surface hardning of steel -bonded carbide being used in hot working dies.

关 键 词：碳化钨 钢结硬质合金 渗硼 热疲劳 

分 类 号：TF125.32[冶金工程—粉末冶金]