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| Ti含量对X65管线钢组织与力学性能的影响 |
| Effect of titanium content on the microstructure and mechanical properties of X65 pipeline steel |
| 投稿时间：2014-03-18 |
| DOI： |
| 中文关键词: Ti微合金化 X65管线钢 显微组织 强韧性 |
| 英文关键词: Ti microalloying X65 pipeline steel microstructure strength and toughness |
| 基金项目:湖北省科技厅研究与开发计划项目(2012BAA14005)；莱钢科技开发基金项目(2010R006). |
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| 中文摘要: |
| 利用光学显微镜、扫描电镜和透射电镜观察两组不同Ti含量的X65级别管线钢显微组织和析出物变化,并进行室温拉伸性能和0 ℃时CVN冲击功测试。结果表明,随着Ti含量增大,钢中析出物数量增多,多边形铁素体尺寸变细,珠光体形态退化,材料强韧性增大；Ti含量为0.11%时材料强韧性满足API Spec 5L—2007标准要求。 |
| 英文摘要: |
| Changes in the microstructure and precipitates of two X65 pipeline steels with different contents of titanium were observed and analyzed by means of optical microscope, scanning electron microscope and transmission electron microscope. The steels’ room temperature tensile strength and Charpy-Votch impact observed energy at 0 ℃ were determined. The results show that increasing content of titanium leads to the increase in precipitate number, refined polygonal ferrite, degenerated pearliteandincreaseofthesteels’strengthandtoughness,andwhentitaniumcontentreaches0.11wt%, the strength and toughness of the steel meet the requirements of API Spec 5L—2007. |
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