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首页> 外文期刊>Journal of Materials Engineering and Performance >Development of Precipitation Strengthened Steel with Adequate Stretch Flangeability
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Development of Precipitation Strengthened Steel with Adequate Stretch Flangeability

机译：具有足够拉伸凸缘性的沉淀强化钢的开发

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摘要

An experimental steel of the composition (in wt.%) 0.04C-0.81Mn-0.38Si-0.15Ti-0.01S-0.013P-0.043Al was hot rolled into 4 mm plates at three different temperatures of 1100, 1000, and 900 ℃. The yield strengths of these plates were in the range of 434-484 MPa while the ultimate tensile strength varied from 508 to 586 MPa. Elongation values ranged from 13.0 to 17.8%. Hole expansion ratios (λ) varied from 23 to 30.7%. In particular, the plate rolled at 1000 ℃ showed a yield strength of 484 MPa, an ultimate tensile strength of 586 MPa, a total elongation of ～15%, and a hole expansion ratio of ～23%. Transmission electron microscopy showed the presence of fine precipitates of titanium carbosulfide (～10-50 nm). Therefore, maximum precipitation strengthening was obtained in the plate that was hot rolled into a thickness of 4 mm at 1000 ℃.
机译：将组成为0.04C-0.81Mn-0.38Si-0.15Ti-0.01S-0.013P-0.043Al的实验钢（以重量％计）在1100、1000和900的三个不同温度下热轧成4 mm板℃。这些板的屈服强度在434-484 MPa的范围内，而极限抗拉强度则从508到586 MPa不等。伸长率范围为13.0至17.8％。扩孔率（λ）从23到30.7％。特别是，在1000℃轧制的钢板的屈服强度为484 MPa，极限抗拉强度为586 MPa，总伸长率为〜15％，扩孔率为〜23％。透射电子显微镜显示存在细小的碳硫化钛沉淀（〜10-50 nm）。因此，在1000℃下热轧成4mm厚的板可获得最大的沉淀强化。

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