基于微观组织演变模拟的大型饼类锻件质量控制
Quality Control of Large Cake Forging Based on Microstructure Simulation
王梦寒， 李玉凤， 徐志敏， 周 杰
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作者单位：（重庆大学 材料科学与工程学院，重庆 400044）
中文关键字：大型饼类锻件； 微观模拟； 质量控制
英文关键字：large cake forging; microstructure simulation; quality control
中文摘要：通过有限元模拟软件DEFORM-3D对大型饼类锻件的锻造工艺及锻造过程中微观组织的演变进行了模拟，分析了微观组织演变与可控工艺因素间的变化规律。结果表明，大型饼类锻件热锻过程中内凹球面镦板镦粗较平板镦粗晶粒细化效果好，动态再结晶体积分数高达62.7%；压下率对微观组织的变化影响较大，镦粗完毕晶粒度达到134 ?滋m，拔长过程压下率大于15%大型锻件才发生动态再结晶，且晶粒尺寸变化幅度较小、分布均匀。研究宏观工艺参数与微观组织演变的规律对于大型饼类锻件的质量控制有实际指导意义。
英文摘要：The forming process and microstructure evolution of large cake forging was simulated by finite element simulation software DEFORM-3D, the relationship between microstructure and controllable process factors was analyzed. The results show that concave spherical upsetting is more conducive to grain refinement than plate upsetting during hot forging for large cake forgings, and the volume fraction of dynamic recrystallization achieves 62.7%; the reduction rate is another major factor on microstructure, the average grain size reaches 134 μm in upsetting process; when the reduction rate is more than 15%, the uniformity of grain is better. Researching the relationship between macro parameters and micro-structural evolution of large cake forgings has practical significances for its quality control.