两相区冷速对齿轮钢20CrMnTi带状组织的影响Influence of cooling speed in two-phase region on banded structure of 20CrMnTi steel
孔祥华,孙瑞虹,唐晋,赵广宏,孙彦辉
摘要(Abstract):
带状组织包括一次带状组织和二次带状组织,是20CrMnTi等亚共析钢常见的组织缺陷,使产品的力学性能显著降低。一次带状组织产生的根本原因是枝晶偏析,通过控制连铸水冷可以抑制该带状组织的产生。通过钢的模拟冷却试验,研究了齿轮钢20CrMnTi二次带状组织的变化规律,根据铁碳相图和亚共析钢的连续冷却曲线,提出了两相区(F+A)快冷可以避免二次带状组织(通常所称的带状组织)出现的理论。
关键词(KeyWords): 20CrMnTi;带状组织;两相区快冷
基金项目(Foundation):
作者(Author): 孔祥华,孙瑞虹,唐晋,赵广宏,孙彦辉
DOI: 10.13289/j.issn.1009-6264.2012.04.020
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