Paper Information

Journal:   INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE (ENGLISH)   Spring 2003 , Volume 14 , Number 2; Page(s) 89 To 99.
 
Paper: 

MODIFICATION OF NBC WITH TI IN CAST NB TOOL STEEL

 
 
Author(s):  KHEYRANDISH SH.*
 
* 
 
Abstract: 
The shape of niobium carbide in niobium modified cast AISI M7 high-speed steel is string like, which has negative advantages on the mechanical properties of the steel. So in this paper experiments have been carried out to evaluate the effect of titanium addition on the modifying of the shape of this carbide, and the other changes occurred in the microstructure, using EDX analysers attached to the scanning electron microscope. The volume percent of eutectic phase and eutectic cell size and also volume percent of different carbides of new steel, which is heat treated under different condition, are also determined. The results show that titanium addition modifies the cast structure of Nb-alloyed steels and reduce the size and volume of eutectic cells and increases the maximum hardness of the steel.
 
Keyword(s): HIGH- SPEED STEEL, NBC, MICROSTRUCTURE, TITANIUM OR TI.
 
References: 
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