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4.
Conclusions 结论
The present work, aimed at studying the influence of carbon
on the simulated in-service properties of heat-treated high-chromium white cast irons, led to the following conclusions:
l The 500 °C hot compression behaviour of heat-treated low-
and high-carbon white cast irons is excellent: their
strengths are very high and a significant ductility was also
observed.
l The wear resistance of high-chromium white cast irons is inversely proportional to the hardness of the product. The wear micromechanism
on both materials
takes place by virtue of a strong plastic deformation under compression, which ultimately leads to necking and final cracking into small particles. l High-carbon white cast iron, with a higher volume fraction
of chromium carbides has a higher strength and a lower ductility and is also more wear-resistant than low-carbon
white cast iron. l Low-carbon white cast iron and specially high-carbon white
iron (higher chromium content) hardly oxidize at 500 and 600 °C in still air. The good oxidation resistance of these alloys
is justified on account of their high-chromium content. | 
发表于 2012-12-24 21:25
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发表于 2012-12-25 15:14
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