51CrV4弹簧钢低温脆性的研究  

Research on Low Temperature Brittleness of 51CrV4 Spring Steel

作　　者：卫广智[1] 时雨[1] 潘广明[1] 牛犇[1] 陈龙[1] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550003

出　　处：《热加工工艺》2012年第24期72-74,共3页Hot Working Technology

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。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~C and no brittle fracture happens. The impact ~acture 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.

关 键 词：51CrV4 低温脆性 冲击功 裂纹源 

分 类 号：TG113.22[金属学及工艺—物理冶金]