任威旺,朱坦华,李耀强,高小勇,任强,张立峰

• 1:燕山大学机械工程学院
• 2:河钢集团有限公司
• 3:河北钢铁集团销售公司
• 4:北方工业大学机械与材料工程学院

摘要(Abstract)：

采用扫描电镜和夹杂物自动扫描分析仪研究了热处理对1215M高硫易切削钢中MnS夹杂物的尺寸、形貌、数量、面积和长径比的影响。结果表明：在1150℃热处理时，保温时间对MnS夹杂物的影响很大；当保温时间小于5 h时，随着保温时间增加，MnS的长度、长径比和面积逐渐减小，长条形MnS两端的尖头逐渐变得圆滑；当保温时间超过5 h, MnS夹杂物的长度、长径比和面积几乎不变，但是原始奥氏体晶粒尺寸明显增加；MnS夹杂物的成分保持不变，说明热处理过程中MnS形状发生变化的驱动力是界面扩散。在本实验条件下，1150℃热处理的最佳保温时间为5 h。

关键词(KeyWords)： 易切削钢;硫化锰;热处理;长径比

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2023YFB3709900);; 国家自然科学基金(U22A20171,52274398)

作者(Author): 任威旺,朱坦华,李耀强,高小勇,任强,张立峰

DOI: 10.13289/j.issn.1009-6264.2024-0434

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