闭开联合楔横轧微观组织温度的影响规律
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摘要
以42CrMo钢为研究材料,在Deform-3D软件中建立了闭开联合楔横轧热-力-微观组织耦合的有限元模型.通过单因素方法,分析了轧制温度对轧件平均晶粒尺寸的影响规律.结果表明,降低轧制温度,轧件越有利于结晶,平均晶粒尺寸越小;闭式轧制后晶粒随着温度的降低整体得到细化;开式阶段晶粒随着温度的升高,平均晶粒大小变化不明显.通过金相实验与模拟对比发现,两者曲线趋势一致,误差为15%,验证了有限元模拟的可靠性.
In order to ensure the mechanical properties of the closed-open cross wedge rolling products,this paper uses 42CrMo as the research material,and establishes the finite element model of the combined heat-force-micro-structure coupling with Deform-3D software.The influence of rolling temperature on the average grain size of the rolled piece was analyzed by single factor method.It was obtained that the rolling piece was more favorable for crystallization and the average grain size was smaller as the rolling temperature decreased.After closed rolling,the grain size is getting refined as the temperature decreases.In the open rolling stage,the grain size does not change significantly with the increasing of temperature.Through the comparison of metallographic experiments and simulations,the trend of the two curves is consistent with an error of 15%,which verifies the reliability of the finite element simulation.
In order to ensure the mechanical properties of the closed-open cross wedge rolling products,this paper uses 42CrMo as the research material,and establishes the finite element model of the combined heat-force-micro-structure coupling with Deform-3D software.The influence of rolling temperature on the average grain size of the rolled piece was analyzed by single factor method.It was obtained that the rolling piece was more favorable for crystallization and the average grain size was smaller as the rolling temperature decreased.After closed rolling,the grain size is getting refined as the temperature decreases.In the open rolling stage,the grain size does not change significantly with the increasing of temperature.Through the comparison of metallographic experiments and simulations,the trend of the two curves is consistent with an error of 15%,which verifies the reliability of the finite element simulation.
引文
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[6]姬开宇,束学道,孙宝寿,等.基于挡楔与二次闭式的闭开联合楔横轧有限元数值模拟[J].宁波大学学报(理工版),2016,29(2):73-76.
[7]Wei J,Shu X D,Tian D Y,et,al.Study in shaft end forming quality of closed-open cross wedge,rolling shaft using a wedge block[J].International Journal of Advanced Manufacturing Technology,2017,93(5):1-11.
[8]Shu X D,Wei J,Liu C.Study on the control of end quality by closed cross wedge rolling based wedge block[J].Metalurgija,2017,56(1/2):123-126.
[9]朱德彪,束学道.工艺参数对楔横轧GH4169合金轴类件力能参数的影响[J].塑性工程学报,2018,25(1):52-59.
[10]蔺永诚,陈明松,钟掘.42Cr Mo钢的热压缩流变应力行为[J].中南大学学报(自然科学版),2008,39(3):549-553.
[11]俞汉清,陈金德.金属塑性成形原理[M].北京:机械工业出版社,1999:19-25.
[12]蔺永诚,陈明松,钟掘.42Cr Mo钢亚动态再结晶行为研究[J].材料热处理学报,2009,30(2):71-75.
[13]蔺永诚,陈明松,钟掘.42Cr Mo钢变形奥氏体的静态再结晶[J].中南大学学报(自然科学版),2009,40(2):411-416.
[2]Pater Z.A study of cross wedge rolling process[J].Journal of Materials Processing Technology,1998,98(80/81):370-375.
[3]马振海,杨翠苹,胡正寰.楔横轧轧件端头凹心影响因素的研究[J].锻压技术,2002,27(1):29-31.
[4]程超.闭式楔横轧成形轴类件及其端部质量研究[D].宁波:宁波大学,2013.
[5]魏新红,束学道.坯料端部形状对楔横轧轧件凹心影响研究[J].热加工工艺,2012,40(3):54-56.
[6]姬开宇,束学道,孙宝寿,等.基于挡楔与二次闭式的闭开联合楔横轧有限元数值模拟[J].宁波大学学报(理工版),2016,29(2):73-76.
[7]Wei J,Shu X D,Tian D Y,et,al.Study in shaft end forming quality of closed-open cross wedge,rolling shaft using a wedge block[J].International Journal of Advanced Manufacturing Technology,2017,93(5):1-11.
[8]Shu X D,Wei J,Liu C.Study on the control of end quality by closed cross wedge rolling based wedge block[J].Metalurgija,2017,56(1/2):123-126.
[9]朱德彪,束学道.工艺参数对楔横轧GH4169合金轴类件力能参数的影响[J].塑性工程学报,2018,25(1):52-59.
[10]蔺永诚,陈明松,钟掘.42Cr Mo钢的热压缩流变应力行为[J].中南大学学报(自然科学版),2008,39(3):549-553.
[11]俞汉清,陈金德.金属塑性成形原理[M].北京:机械工业出版社,1999:19-25.
[12]蔺永诚,陈明松,钟掘.42Cr Mo钢亚动态再结晶行为研究[J].材料热处理学报,2009,30(2):71-75.
[13]蔺永诚,陈明松,钟掘.42Cr Mo钢变形奥氏体的静态再结晶[J].中南大学学报(自然科学版),2009,40(2):411-416.