| 贝氏体钢的强韧化途径 |
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| 引用本文： | 方鸿生,刘东雨,徐平光,白秉哲,杨志刚.贝氏体钢的强韧化途径[J].机械工程材料,2001,25(6):1-5,41. |
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| 作者姓名： | 方鸿生 刘东雨 徐平光 白秉哲 杨志刚 |
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| 作者单位： | [1]清华大学材料科学与工程系教育部先进材料实验室，北京100084 [2]清华大学材料科学与工程系教育部先进材料实验室 |
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| 摘 要： | 发现在粒状贝氏体组织中，控制其小岛尺寸、数量和分布，可获良好强性，研制出粒状贝氏体钢。首次用粥的仿晶界型铁素作韧性与粒贝结合，可获优良强韧性，并研制出此类复相钢。通过合金设计，在空冷条件下获得具有超精细结构的无碳化物贝氏体／马氏体复相组织，贝氏体各层次单元由奥氏体膜包围，使贝氏体／马氏体复相组织具有优良的强韧性，并研制出此类高强高韧钢。
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| 关 键 词： | 强韧性 粒状贝氏体 仿晶界型铁素体 贝氏体／巴氏体复相组织 贝氏体钢 |
| 文章编号： | 1000-3738(2001)06-0001-05 |
The Ways to Improve Strength and Toughness of Bainitic Steel |
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| FANG Hong sheng,LIU Dong yu,XU Ping guang,BAI Bing zhe,YANG Zhi gang.The Ways to Improve Strength and Toughness of Bainitic Steel[J].Materials For Mechanical Engineering,2001,25(6):1-5,41. |
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| Authors: | FANG Hong sheng LIU Dong yu XU Ping guang BAI Bing zhe YANG Zhi gang |
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| Abstract: | The combination of strength and toughness can be improved in granular bainite microstructure (B g) by controlling the size, amount and distribution of martensite/austenite islands(M/A islands). Based on this discovery, a new granular bainite steel has been first developed. The combination of grain boundary allotrimorphic ferrite (F GBA ) with granular bainite lead to a new F GBA /B g duplex steel in the world. By suitable alloy composition design, a new air cooling carbide free bainite/martensite (CFB/M) steel with ultra fine microstructure has been developed. The bainite units of different grade is surround by retained austenite. The CFB/M duplex steel exhibits a good combination of strength and toughness. |
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| Keywords: | strength and toughness granular bainite F GBA bainite/martensite mixed microstructure |
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