秦晓峰,朱洪武,周乐育,刘雅政

• 1:北京科技大学材料科学与工程学院

摘要(Abstract)：

对FF710钎具用钢设计了连续冷却实验,分析了不同冷却速度下的显微组织及硬度,讨论了无碳化物下贝氏体组织形成原因以及无碳化物下贝氏体/马氏体(CFB/M)复相组织的强韧性。研究表明:通过连续冷却在过渡区及基体获得的贝氏体组织均为CFB,电子衍射分析表明CFB是由贝氏体铁素体板条和残留奥氏体组成;CFB/M复相组织具有明显的强韧化效果。因此,在连续冷却过程中冷速应该控制在0.1～0.3℃/s之间,使得过渡区获得马氏体与细针状或竹叶状分布的CFB复相组织,提高渗碳层的强韧性;基体获得贝氏体/低碳马氏体复相组织,达到外强内韧的组织要求。

关键词(KeyWords)： FF710;钎具用钢;无碳化物下贝氏体;CFB/M复相组织;强韧性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 秦晓峰,朱洪武,周乐育,刘雅政

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