不均匀温度场楔横轧棒材的组织与性能Microstructure and properties of rolled pieces after three-roll cross wedge rolling by non-uniform temperature field
仇平,吕知清,傅万堂,赵石岩,孔玲
摘要(Abstract):
用FEM方法对不均匀温度场三辊楔横轧棒材的轧制过程进行了数值分析,分析了轧后轧件径向截面上温度及等效应变的分布规律,并通过实验研究分析测定了截面上不同位置处的显微组织及力学性能。结果表明:不均匀温度场三辊楔横轧棒材轧后温度场与等效应变在轧件径向截面上成环形分布,且心部温度高变形量小,由心部向外温度逐渐降低变形程度逐渐增大。轧后轧件径向截面上不同位置处组织及性能存在一定的差别。轧件心部为珠光体与先共析铁素体组织,外层边缘为球化渗碳体与铁素体组织。
关键词(KeyWords): 楔横轧;显微组织;有限元分析;不均匀温度场
基金项目(Foundation): 国家自然科学基金(51101137);; 河北省高等学校科学研究计划资助项目(2010287);; 河北省自然科学基金(2011203055)
作者(Author): 仇平,吕知清,傅万堂,赵石岩,孔玲
DOI: 10.13289/j.issn.1009-6264.2012.02.020
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