Acta Metallurgica Sinica (English Letters) ›› 1992, Vol. 5 ›› Issue (2): 133-136.

• Research paper • Previous Articles     Next Articles

ELECTRON MICROSCOPE STUDY ON δ-EUTECTOID IN HIGH SPEED STEEL

SHI Gongqi DING Peidao ZHO U Shouze Chongqing University,Chongqing,China   

  • Received:1992-04-25 Revised:1992-04-25 Online:1992-04-25 Published:2009-10-10

Abstract: The morphology and structure of δ-eutectoid and the transformation of δ-eutectoidic austenite in high speed steel have been studied under SEM and TEM.The δ-eutectoid in as-cast high speed steel is rod-shaped eutectoidic units with different orientations and is markedly surrounded by carbide shell.The eutectoidic carbide is rod-shaped M_6C of square eross section.The eutectoidic austenite may transform into pearlite structure during cooling.

Key words: high speed steel, eutectoidic carbide, eutectoidic austenite