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首页> 外文会议>International Conference on Mechanical Engineering and Materials >Effect of aging temperature on the microstructure and mechanical properties of 1000MPa grade low carbon bainitic steel
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Effect of aging temperature on the microstructure and mechanical properties of 1000MPa grade low carbon bainitic steel

机译：老化温度对1000MPa级低碳壳体钢微观结构和力学性能的影响

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摘要

A kind of 1000MPa low carbon bainitic steel belonged to the Fe-Cu-Nb series was hot rolled and aged, the influence of aging temperatures on the microstructure and mechanical properties of the steel were investigated by using Scanning electron microscopy (SEM) and transmission electron microscopy(TEM). The results show that the microstructure of the low carbon bainitic steel consisted of lath-shaped bainite(LB), granular bainite(GB) and quasi-polygonal ferrite(QF), and the proportion of each kind of microstructure changed with the aging temperatures. The strength of steel with the increase of aging temperature first increased, then decreased, Aging temperatures had distinct effect on yield strength of the tested steel, and less effect on the ultimate tensile strength, we can get the best comprehensive properties yield strength 1011.87 MPa and elongation rate 16.38% of good tough match aged at 450°C. Through analysis it is concluded that the strength of the tested steels aged at 450°C reaches the maximum value, which is attributed to the precipitation of a large amount of fine ε-Cu particles(5～10nm) and a small number of(Nb, Ti)(C, N) precipitates.
机译：采用扫描电子显微镜（SEM）和透射电子（SEM）和透射电子，采用轧制和老化的1000MPa低碳纤根钢是热轧和老化的轧制，老化温度对钢的微观结构和力学性能的影响显微镜（TEM）。结果表明，低碳贝氏体钢的微观结构由岩形贝氏体（LB），粒状贝氏体（GB）和准多晶硅纹（QF）组成，并且每种微观结构的比例随老化温度而变化。随着老化温度的增加，钢的强度首先增加，然后减少，老化温度对测试钢的屈服强度不同，效果较小，我们可以获得最佳综合性能屈服强度1011.87 MPa和伸长率为450°C的良好硬质匹配的16.38％。通过分析，得出结论，在450℃下老化的测试钢的强度达到最大值，归因于大量细ε-Cu颗粒（5〜10nm）和少量（NB）的沉淀，Ti）（c，n）沉淀。

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