周雪峰,朱旺龙,江红兵,方峰,涂益友,吴建忠

• 1:东南大学材料科学与工程学院
• 2:江苏(天工)工模具钢工程技术研究中心

摘要(Abstract)：

采用TEM、EDS、碳萃取复型等手段,研究了高速钢回火组织与性能演变规律,重点分析了过回火阶段合金碳化物演变与元素分配行为。结果表明,550℃回火后,高速钢组织中析出大量与基体共格的纳米级合金碳化物MC和M2C,硬度达到峰值。过回火阶段,M2C碳化物尺寸粗化倾向明显,并且发生结构转变,形成M23C6和M6C,而MC碳化物则表现出较高的尺寸和结构稳定性,对高速钢保持高温性能稳定发挥主要作用。随回火温度升高,碳化物中Fe含量明显下降、强碳化物形成元素含量上升,对碳化物析出和粗化行为产生重要影响。

关键词(KeyWords)： 高速钢;过回火;碳化物;稳定性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51301038,51371050);; 江苏省产学研联合创新资金前瞻性联合研究项目(BY2014127-03);; 江苏省自然科学基金(BK20141306);; 江苏省高端结构材料重点实验室开放基金(hsm1404);; 中央高校基本科研业务费专项资金;; 江苏省重点研发计划产业前瞻与共性关键技术(BE2016154)

作者(Author): 周雪峰,朱旺龙,江红兵,方峰,涂益友,吴建忠

DOI: 10.13289/j.issn.1009-6264.2016.09.025

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