MICROSTRUCTURAL INVESTIGATION ON 22CR-5NI DUPLEX STAINLESS-STEEL AFTER AGING AT TEMPERATURE ABOVE 600-DEGREES-C

被引：0
|
作者：
SCOPPIO, L
BARTERI, M
机构：
来源：
INSTITUTE OF PHYSICS CONFERENCE SERIES | 1990年 / 98期
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D O I：
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中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A microstructural investigation on a duplex stainless steel (22Cr-5Ni), has been performed. The time-temperature-precipitation curves (T.T.P.) have been defined showing the proneness of this material to decompose in embrittling and corrosion resistance deteriorating phases. After ageing treatments between 600-1250-degrees-C the original two-phase structure decomposes with the occurrence of secondary phases such as carbides (M23C6), nitrides (Cr2N), sigma, chi and R phases. 750-900-degrees-C is the most critical ageing temperature range for the intergranular precipitation of carbides and sigma phase that are known to enhance the sensitivity to intergranular corrosion of the alloy.
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页码：331 / 334
页数：4
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