【摘要】 以51CrV4弹簧钢为研究对象,研究了其低温脆性。结果表明,在-60～0℃时,51CrV4弹簧钢的冲击功在20～25J,它会随温度的下降而有所降低;在-60℃时其冲击功仍保持较高水平,没有发生脆性断裂。51CrV4弹簧钢的冲击断口为混合型断口,有解理、撕裂和韧窝聚集等特征。经能谱分析可知,51CrV4弹簧钢含有少量由硅、氧组成的非金属夹杂物,属于硅酸盐类夹杂。更多还原

【Abstract】 Using 51CrV4 spring steel as research object,its low-temperature brittleness was studied.The results show that the impact energy of 51CrV4 spring steel is 20-25 J at-60℃——0℃,and it decreases with the decline of temperature,the impact energy maintains in a high level at-60℃ and no brittle fracture happens.The impact fracture of 51CrV4 spring steel is mixed type fracture,with cleavage,tears and dimple aggregation characteristics.By the spectrum analysis,51CrV4 spring steel contains small amounts of non-metallic inclusions made up of silicon and oxygen elements,which belong to the silicate inclusions.更多还原