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。
The relationship between fracture toughness and notch toughness, tensile ductilities in lath martensite steel has been investigated.
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。
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.
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。
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.
采用缺口和裂纹两种试样测定合金的断裂韧性；
The fracture toughness of the alloys was measured on single-edge notched beam and cracked beam specimens.
通过改变焊缝夏比冲击试样的缺口取向，研究了缺口位向对多层焊缝金属韧性及断裂过程的影响。
By changing the nolch local ion of Charpy impact test specimens studied the effect of nolch location on toughness and cracking process in multi-layer welds.
与未加微量元素的试验钢相比，在硬度基本相同的情况下，无缺口冲击韧性和强度分别提高192 %和16 %，伸长率提高6 5 %。
Compared with the steel without adding trace elements, non breach impact toughness, UTS and elongation were increased by 192 %, 16 % and 65 % respectively, but hardness was not obviously changed.
与未加微量元素的试验钢相比，在硬度基本相同的情况下，无缺口冲击韧性和强度分别提高192 %和16 %，伸长率提高6 5 %。
Compared with the steel without adding trace elements, non breach impact toughness, UTS and elongation were increased by 192 %, 16 % and 65 % respectively, but hardness was not obviously changed.
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