| 奥氏体化温度对P20B钢淬透性的影响行为 |
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| 引用本文： | 李丹,闵永安,吴晓春,陈卓.奥氏体化温度对P20B钢淬透性的影响行为[J].上海大学学报(自然科学版),2011,17(3):297-301. |
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| 作者姓名： | 李丹 闵永安 吴晓春 陈卓 |
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| 作者单位： | 上海大学材料科学与工程学院,上海,200072 |
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| 基金项目： | 国家科技部“十一五”科技资助项目(2007BAE51D04) |
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| 摘 要： | 采用DIL805A型相变仪,测定含硼P20B钢在850～1 000℃的奥氏体化条件下的过冷奥氏体在640～720℃等温时的C曲线;结合.850～1 000℃奥氏体化条件下晶粒度的测定和第二相分析,研究硼对P20B钢淬透性的影响行为.结果表明:在850～920℃的温度范围内,随着奥氏体化温度的升高,晶粒略有长大,固溶硼含...
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| 关 键 词： | 硼微合金化 淬透性 模具钢 奥氏体化温度 |
Behavior of Austenizing Temperature on Hardenability of P20B Steel |
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| LI Dan,MIN Yong-an,WU Xiao-chun,CHEN Zhuo.Behavior of Austenizing Temperature on Hardenability of P20B Steel[J].Journal of Shanghai University(Natural Science),2011,17(3):297-301. |
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| Authors: | LI Dan MIN Yong-an WU Xiao-chun CHEN Zhuo |
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| Institution: | LI Dan,MIN Yong-an,WU Xiao-chun,CHEN Zhuo(School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China) |
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| Abstract: | The C curve of supercooled austenite of plastic mould steel P20B was investigated with the DIL805A dilatometric instrument.The austenitizing temperature was between 850 ℃ and 1 000 ℃ and the isothermal temperature between 640 ℃ and 720 ℃.We compared austenite grain size at different austenitizing temperatures and analyzed the second phase which obtained from the electrolytic extraction procedure.The results show that at 850~920 ℃ in the temperature range when the austenitizing temperature is increased,the grains grow slightly,the content of B increased significantly to make the C curve strongly shift right.At 920~1 000 ℃ in the temperature range when the austenitizing temperature is increased,the grains grow significantly,and the content of B no longer increases so hardenability of P20B steel does not increased. |
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| Keywords: | boron alloying hardenability mould steel austenitizing temperature |
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