Abstract:
The influence of alloy elements, such as boron and silicon, on
the microstructure and properties of as-cast high chromium cast
iron is studied. The results show that boron and silicon have a
great effect on the mechanical properties and the wear
resistance. Through proper addition of boron and silicon, the
properties of as-cast high chromium cast iron can be improved
effectively. Through analyzing the distribution of elements by
scanning electron microscope, it has been shown that the
addition of boron and silicon lowers the mass fraction of
chromium saturated in as-cast austenite, and makes it unstable
and liable to be transformed into martensite. The as-cast high
chromium cast iron with proper content of boron and silicon is
suitable for the manufacture of lining for asphalt concrete
mixer and its wear resistance is 14 times that of lining made of
low alloy white cast iron.
Key words: High
chromium cast iron Hardness Wear resistance Impact toughtness
Lining
Manuscript received on July
2, 1997; revised manuscript August 20, 1997
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