notch toughness

The effect of different kinds and different content rare earth oxide added in coated electrode on low temperature notch toughness, weld metal microstructure and diffusible hydrogen was studied.

通过向焊条药皮中加入稀土氧化物的方法，研究了在焊条药皮中加入不同种类、不同含量的稀土氧化物对焊缝金属低温冲击韧性、显微组织以及扩散氢含量的影响。

The computed 2 δ c values corresponded to the experimental deep notch root radius ρ 0. The relationship between fracture toughness and notch toughness depended on the relative size of effective deformed zone 2 δ c and mean free distance d B between bainites.

计算的2δc与测定的深缺口临界根部半径ρ0有对应关系。裂纹韧度与缺口韧度的关系取决于2δc与贝氏体之间的平均自由距离dB。

The tensile strength, yield strength and notch toughness of Q420 angle steel produced by V-N interalloying method were improved evidently and integration properties were better.

采用加入V-N中间合金方法生产的Q420角钢的抗拉强度、屈服强度和冲击韧性明显提高，具有较好的综合性能。