董正强,蒋波,张朝磊,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)：

为控制磁痕缺陷的产生,研究了曲轴用非调质钢C38N2在轧制过程中,累积压下量、道次压下量和变形温度对钢中Mn S夹杂的数量、尺寸和形态演变规律的影响。结果表明,随累积压下量增大,由铸坯到中间坯到轧材,纵剖面单位面积观察到的Mn S夹杂数量不断减少。累积压下量和变形温度相同情况下,道次压下量越大,Mn S长宽比越大。累积压下量和道次压下量相同情况下,变形温度越高,Mn S长宽比越小。边部Mn S夹杂数量显著大于1/2半径处,1/2半径处Mn S夹杂数量略大于心部;Mn S夹杂的长宽比基本上符合1/2半径处>心部>边部的规律。开坯轧制可显著减少纵剖面单位面积中Mn S的数量;变形温度越高,道次压下量越大,则轧制过程中的变形渗透程度越高,Mn S夹杂的数量和形态分布越均匀。

关键词(KeyWords)： 非调质钢;MnS;累积压下量;道次压下量;变形温度

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项资金资助项目(FRF-TP-14-003A1)

作者(Author): 董正强,蒋波,张朝磊,周乐育,刘雅政

DOI: 10.13289/j.issn.1009-6264.2015.08.026

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