摘要
为改善齿轮钢材质量,采用原位统计分布分析、钻点取样化学成分分析等方法,研究了改变连铸结晶器搅拌工艺所生产的20CrMnTi钢连铸坯中C、Mn、Cr等合金元素的分布情况,得到了表示合金元素分布的二维、三维分布图,以及可定量表征材料均匀度的统计偏析度,从而对连铸生产工艺参数进行优化。结果表明,在其它生产工艺参数稳定的情况下,结晶器电磁搅拌电流为400 A,频率为2.5 Hz时,生产的连铸坯合金元素偏析程度最小。
The segregation of alloying element of gear steel 20CrMnTi has significant influence on the machining accuracy of gear.The macro segregation law of C、Mn and Cr in 20CrMnTi billets that were produced with different MEMS process was studied with the method of original position statistic distribution analysis（OPA）.2-D and 3-D distribution figures of alloying elements were obtained,and the quantitative description of the homogeneity of material was figured out.The results showed that when other conditions were not changed,the degree of segregation was the least when the current of the mould electromagnetic stirring was 400 A,and with the frequency of 2.5 Hz.
出处
《铸造技术》
CAS
北大核心
2011年第8期1125-1128,共4页
Foundry Technology
关键词
偏析
20CRMNTI钢
电磁搅拌
原位分析
Segregation
20CrMnTi steel
Mould electromagnetic stirring（MEMS）
Original position statistic distribution analysis（OPA）
