| 加热速度对T91铁素体耐热钢奥氏体形成的影响 |
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| 引用本文： | 宁保群,严泽生,付继成,别利剑,刘永长. 加热速度对T91铁素体耐热钢奥氏体形成的影响[J]. 材料科学与工艺, 2009, 17(3): 329-332 |
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| 作者姓名： | 宁保群 严泽生 付继成 别利剑 刘永长 |
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| 作者单位： | 宁保群,NING Bao-qun(天津理工大学,材料科学与工程学院,天津,300191;天津大学,材料科学与工程学院,天津,300072);严泽生,付继成,YAN Ze-sheng,FU Ji-cheng(天津钢管集团股份有限公司,天津,300301);别利剑,BIE Li-jian(天津理工大学,材料科学与工程学院,天津,300191);刘永长,LIU Yong-chang(天津大学,材料科学与工程学院,天津,300072) |
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| 基金项目： | 国家自然科学基金和上海宗钢集团公司联合资助重点项目，国家自然科学基金，天津市材料物理与化学重点学科资助项目 |
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| 摘 要： | 采用高精度差分膨胀仪对不同加热速度(10~6000 K/min)下T91铁素体耐热钢的奥氏体形成动力学规律进行了系统研究.研究表明:加热速度显著影响T91钢的奥氏体形成开始温度Ac1、结束温度Ac3、相变速率及淬火后的组织.加热速度愈大,Ac1和Ac3温度愈高,奥氏体相变速率愈快,奥氏体形成温度区间愈窄;相对较慢和较快的加热速度对淬火后的组织都有不利的影响.
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| 关 键 词： | 差分膨胀仪 加热速度 T91铁素体耐热钢 奥氏体化 |
Effect of heating rate on the austenization process of T91 ferritic heat-resistant steel |
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| NING Bao-qun,,YAN Ze-sheng,FU Ji-cheng,BIE Li-jian,LIU Yong-chang Corporation,Tianjin ,China). Effect of heating rate on the austenization process of T91 ferritic heat-resistant steel[J]. Materials Science and Technology, 2009, 17(3): 329-332 |
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| Authors: | NING Bao-qun YAN Ze-sheng FU Ji-cheng BIE Li-jian LIU Yong-chang Corporation Tianjin China) |
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| Affiliation: | NING Bao-qun1,2,YAN Ze-sheng3,FU Ji-cheng3,BIE Li-jian1,LIU Yong-chang2 (1.School of Materials Science , Engineering,Tianjin University of Technology,Tianjin 300191,China,2.College of Material Science , Engineering,Tianjin University,Tianjin 300072,3.Tianjin Pipe(Group) Corporation,Tianjin 300301,China) |
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| Abstract: | The influences of heating rate on the austenization process of T91 ferritic heat-resistant steel were systematically explored by high-resolution differential dilatometer in a wide range of 10～6000 K/min during continuous heating.It is found that the applied heating rate has a significant effect on the Ac1 temperature for the onset of austenization,the Ac3 temperature for the end of austenization,the formation rate of austenite and the final microstructure after quenching.Thus determined temperatures of Ac1 and Ac3increase with the increasing heating rate.For the specimen fastly heated,the temperature range needed for austenization decreases.In addition,the rapid heating rate leads to a high formation rate of austenite and thus a short period for the whole austenization process.Both the slow and fast heating rates have bad influence on the quenched microstructure. |
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| Keywords: | differential dilatometer heating rate T91 ferritic heat-resistant steel austenization |
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