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1·The effect of tiny amount of Titamium on the notch toughness of low carbon boron steel was investigated.

研究了微量钛对低碳硼钢冲击韧性的影响。

2·The relationship between fracture toughness and notch toughness, tensile ductilities in lath martensite steel has been investigated.

研究了超高强度板条马氏体钢的平面应变断裂韧性与缺口韧性、拉伸塑性之间的关系。

3·The influence of phosphorus and grain size on yield strength and Charp V-notch toughness of low carbon steels have been investigated.

研究了磷含量和晶粒尺寸对低碳钢的屈服强度、 冲击韧性和韧脆转变温度的影响。

4·Compared with the forging die steel, casting forging die steel although toughness is low, but high strength, red hardness is good, with low notch sensitivity and high resistance to thermal fatigue.

与锻造模具钢相比，铸造热锻模具钢虽然韧性低，但强度高、红硬性好，具有较低的缺口敏感性和较高的抗热疲劳性。

5·The effect of specimen type, thickness, dimension ratio, and notch sharpness on fracture toughness of a carbon rail steel was examined.

研究了试样类型、试样厚度、比例试样尺寸及切口尖度等因素对普碳轨钢断裂韧性的影响。

6·The anisotropic characteristic which usually exists in materials disappeared completely especially the notch - impact toughness at the transverse direction was increased by 2-3 times.

因此在通常材料中所存在的各向异性完全消失，特别是缺口冲击韧性横向性能值提高了2～3倍。

7·The brittleness tendency of steel has been assessed with fracture toughness and notch impact tests.

用断裂韧度、缺口冲击试验评定钢的脆性倾向。

8·CVN(Charpy V-notch) toughness and grain size number of J55 grade oil casings produced by Baotou Iron and Steel Company did not meet the reiative standards in the past.

本文针对包钢原来生产的J55石油套管冲击韧性不足，晶粒粗大的问题开展研究。

9·The effects of thickness and notch orientation on the toughness of X70 pipeline steel samples with V notch were investigated experimentally by use of the 3-point bending test at different temperature.

通过不同温度条件下不同厚度、不同缺口取向含V形缺口试样进行3点弯曲试验研究，发现X70管线钢具有严重的各向异性现象，其在平行钢板表面方向和沿钢板厚度方向力学性能差异较大。