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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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60Si2Mn钢半固态初生相形成与演变机制
, PP. 689-693
Keywords: 60Si2Mn钢,电磁搅拌,初生相,演变机制
Abstract:
对等温和降温连续搅拌下60Si2Mn初生凝固组织形成与演变规律进行了实验研究.结果表明等温和降温两种搅拌工艺可使初生奥氏体组织枝晶形态演变球化.等温温度越高,初生组球化效果越好;采用较长的连续搅拌时间,初生相可得到充分球化;连续降温搅拌到一定固相分数时晶粒尺寸变化较小;采用降温连续搅拌工艺可获得较小的球形晶粒尺寸.电磁搅拌改变了初生晶粒生核或生长的热力学和动力学条件,从而使初生相的界面形态经历了由球形失稳后转变为枝晶,又经过抑制、熔断、重熔、粗化、聚集而转变为近球形的演变过程.抑制和粗化是促使晶粒界面形态发生演变的主要动力学因素.
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