随奥氏体化温度的升高，实验钢的硬度和冲击韧度先升高后降低；
The hardness and impact toughness increase at first and then drop down with the increases of quenching temperature.
调整微合金含量和种类，可增加钢中碳化物数量、种类和弥散度，从而提高钢的硬度和冲击韧度。
The amount, kind and dispersity of carbide in steel can increase by regulating the content and kind of microalloying elements. So its hardness and impact toughness can be increased.
结果发现，失效件的硅含量偏高、硬度值很不均匀，冲击韧度和伸长率远低于材质要求，因而导致脆断。
The results shows that the failure parts has high silicon content and uneven hardness , the impact toughness and elongation is far below the specification of the material.
从焊接性和焊接接头使用性能两个方面入手，结合焊接接头的硬度、拉伸和冲击韧度的测试，对X80管线钢的焊接性能进行了试验分析。
The mechanical properties and weldabilities of X80 pipeline steel were investigated by testing hardness, tensile strength and impact toughness in this paper.
此外，变质处理对高硼低碳铁基合金硬度无明显影响，但明显提高抗弯强度和冲击韧度。
Furthermore, the modification has no obvious influence on the hardness of high boron and low carbon ferroalloy, but increases its impact toughness and bending strength obviously.
结果表明：热处理后组织与铸态组织相比，碳化物分布趋于弥散细小，冲击韧度和硬度都有较大的提高。
The results indicate that, compared with those of the as-cast Cr28, carbides disperse more uniformly and finer, and the hardness and impact toughness increase significantly.
结果表明：热处理后组织与铸态组织相比，碳化物分布趋于弥散细小，冲击韧度和硬度都有较大的提高。
The results indicate that, compared with those of the as-cast Cr28, carbides disperse more uniformly and finer, and the hardness and impact toughness increase significantly.
应用推荐