INFLUENCE OF ALLOY GRAIN-SIZE ON THE HIGH-TEMPERATURE OXIDATION BEHAVIOR OF SOME STEELS WITH DIFFERENT CR CONTENTS

被引：0
|
作者：
RAMAN, RKS [1 ]
GNANAMOORTHY, JB [1 ]
ROY, SK [1 ]
机构：
[1] INDIAN INST TECHNOL,DEPT MET ENGN,KHARAGPUR 721302,W BENGAL,INDIA
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 1992年 / 45卷 / 06期
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D O I：
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中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Increase in alloy grain size is found to increase the high temperature oxidation resistance of 2.25Cr-1Mo steel (at 823 K) and 9Cr-1MO steel (at 973 K), in air. This behaviour is attributed to the greater internal oxidation in case of fine grained 2.25Cr-1Mo steel, and to unfavourable scale morphology leading to spallation in case of 9Cr-1Mo steel. At 973 K, oxidation resistance increased with decreasing grain size in an SS 316, because of enhanced grain boundary diffusion of Cr leading to early formation of a protective layer.
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页码：391 / 398
页数：8
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