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首页> 外文期刊>ISIJ international >Improvement of High Temperature Strength by Addition of Vanadium Content of Ni–Cr–Mo Steel for Brake Discs
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Improvement of High Temperature Strength by Addition of Vanadium Content of Ni–Cr–Mo Steel for Brake Discs

机译：通过添加用于制动盘的Ni-Cr-Mo钢中的钒来提高高温强度

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摘要

Improvements in the high-temperature strength are desired for the ferritic Ni–Cr–Mo steels used for the brake discs in mechanical brake systems on railway. The objective of this paper is to construct a constitutive equation for the high-temperature deformation in Ni–Cr–Mo steels containing small amounts of V. The examined steels were obtained by varying the addition of V from 0 mass% to 0.27 mass% in the steel. The flow stress of Ni–Cr–Mo steels was increased significantly by the addition of V. It was found that the creep mechanism of examined Ni–Cr–Mo steels was climb-controlled dislocation creep controlled by the lattice diffusion. Owing to the increase in the number of vanadium carbide (VC) particles with increasing the concentration of V, the threshold stress increased due to the Orowan mechanism and as a result, the high-temperature strength also increased. The constitutive equation for the high-temperature deformation of Ni–Cr–Mo steels containing small amounts of V was constructed. The constructed equation is useful in modeling the high-temperature strength under similar heat conditions in brake discs.
机译：铁路机械制动系统中用于制动盘的铁素体Ni-Cr-Mo钢需要提高高温强度。本文的目的是为含少量V的Ni-Cr-Mo钢构建高温变形的本构方程。通过将V的添加量从0质量％更改为0.27质量％，可以得到受检钢。钢。通过添加V，Ni-Cr-Mo钢的流变应力显着增加。发现所检测的Ni-Cr-Mo钢的蠕变机理是受晶格扩散控制的蠕变控制位错蠕变。由于随着V的浓度增加碳化钒（VC）颗粒的数量增加，由于Orowan机理，阈值应力增加，结果，高温强度也增加。建立了含少量V的Ni-Cr-Mo钢高温变形的本构方程。所构造的方程式对于在相似的加热条件下对制动盘的高温强度建模非常有用。

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