成分及尺寸效应对低碳钢中析出相影响
Transactions of Materials and Heat Treatment(2014)
Abstract
通过小样电解试验、XRD、TEM对低碳钢中析出相进行了分析,研究了成分效应、尺寸效应对含钒、氮微合金低碳钢中析出相析出行为的影响.结果表明,低碳钢在相同控轧控冷条件下,尺寸效应对钒影响较大,随尺寸增大,φ32 mm钒析出率比+22mm增加约30%,其中M3C形式析出增加20%以上,以MC形式析出增加约5%;随氮含量升高,φ22 mm中钒析出率增大,达到45% ~ 50%,其中以MC形式析出率占30% ~ 35%,以M3C形式析出率为13% ~ 15%;增加钒含量,氮含量利用率明显提高;钒碳氮化物析出物以5 ~15 nm的细小颗粒为主,同时伴有少量大颗粒.
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Key words
precipitation rate, low-carbon steel, size ,composition
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