| 引用本文: | 王长军,雍岐龙,孙新军,梁剑雄.强塑积大于30 GPa%的热轧中碳TRIP钢组织及性能研究[J].材料科学与工艺,2014,22(2):61-67.DOI:10.11951/j.issn.1005-0299.20140211. |
| WANG Changjun,YONG Qilong,SUN Xinjun,LIANG Jianxiong.Study on the microstructure and mechanical properties of 30 GPa% grade hot rolled medium carbon-TRIP steels[J].Materials Science and Technology,2014,22(2):61-67.DOI:10.11951/j.issn.1005-0299.20140211. |
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| 摘要: |
| 为研究贝氏体相变温度对中碳热轧TRIP钢组织与性能的影响,采用扫描电镜(SEM)、X射线衍射(XRD)与高分辨透射电镜(HRTEM)对含Ti与Mo的中碳热轧TRIP钢进行了显微组织观察、残余奥氏体含量测定以及析出相的表征与分析.结果表明:在400 ℃贝氏体相变温度下,试验钢的残奥含量与强塑积均达到最大值,分别为28.2%和31.14 GPa%；同时在钢中发现了呈块状、无规则形状以及片层状形貌分布的残余奥氏体,对衍射斑标定后显示,片层状残余奥氏体与铁素体基体同时满足kurdjumov-Sachs (K-S)与Nishiyama-Wasserman (N-W)位向关系；HRTEM分析显示,Mo可以溶入TiC而生成(Ti,Mo)C粒子,而纳米级的(Ti,Mo)C粒子可以显著提高钢的沉淀析出强化效果. |
| 关键词: TRIP钢 强塑积 残余奥氏体 (Ti,Mo)C K-S位向关系 N-W位向关系 |
| DOI：10.11951/j.issn.1005-0299.20140211 |
| 分类号:TG142.1 |
| 基金项目:国家重点基础研究发展计划资助项目(2010CB630805). |
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| Study on the microstructure and mechanical properties of 30 GPa% grade hot rolled medium carbon-TRIP steels |
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WANG Changjun, YONG Qilong, SUN Xinjun, LIANG Jianxiong
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(Department of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China)
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| Abstract: |
| To investigate the influence of bainitic transformation temperature on microstructure and mechanical property of hot rolled medium carbon-TRIP steels, a series of experiments, such as scanning electron microscopy (SEM), X-Ray diffraction (XRD) and High Resolution Transmission Electron Microscopy (HRTEM), were conducted. The results show that the bainitic transformation temperature have a significantly effects on retained austenite contents and mechanical properties of TRIP steels, and the optimal bainitic transformation temperature is 400 ℃, at which the retained austenite contents and the balance of strength and ductility were 28.2% and 31.14 GPa%, respectively. Furthermore, it was found that the morphology of retained austenite consisted of Block type, Irregular type and Film type, and Film type austenite exhibited the kurdjumov-Sachs and Nishiyama-Wasserman orientation relationship with ferrite matrix, simultaneously. In addition, HRTEM analysis showed that Mo can incorporate into TiC to form (Ti, Mo) C particle, which can obviously improve the strength of experimental steels. |
| Key words: TRIP steel the balance of strength and ductility retained austenite (Ti,Mo)C K-S N-W |
