锻压技术

TC18钛合金模锻件锻造成形工艺仿真

英文标题：Research on forging process for TC18 titanium alloy forging

作者：黃湘龙易幼平李蓬川沙爱学

分类号：TG316

出版年,卷(期):页码：2012,37(5):7-11

摘要：

采用Deform-3D有限元软件对TC18钛合金模锻件锻造成形过程进行了数值模拟仿真，研究比较了锤锻和液压机模锻两种成形方式的不同。研究结果表明：TC18钛合金模锻件锤锻变形时过热倾向更加明显，锤锻锻件的最高温度比液压机模锻高70℃左右，必须严格控制锻造过程中的温升；锤锻的有效应力分布很不均匀，锤锻锻件的平均有效应力比液压机模锻大30MPa左右，并且存在严重的应力集中区域，而液压机模锻的有效应力变化较为平缓；相比液压机模锻，锤锻锻件的最大和最小有效应变的差值减小了26%，锤锻锻件的变形均匀性得到了改善。

Using Deform 3D finite element software, the numerical simulation about forging process of TC18 titanium alloy forging was conducted. A study by comparing the different results between the hammer forging and hydraulic forging was implemented. The results show that under the conditions of hammer forging, TC18 titanium alloy forging is more obvious to be overheated, as the maximum temperature of the way about 70 ℃ higher than hydraulic forging，its temperature must be strictly controlled in the process of forging; the distribution of effective stress is very uneven, and the mean effective stress of the way is about 30 MPa higher than hydraulic forging, what's more serious is that the stress concentration exists, however the effective stress in the condition of hydraulic forging changes more gently; compared to hydraulic forging, the difference between the maximum and minimum effective strain of the way of forging hammer reduces by 26%, the deformation uniformity of hammer forging is improvement.

基金项目：

国家重大专项资助项目（2009ZX04005-011）

参考文献：

［1］刘惠芳,魏寿庸,刘家峰，等. TC18钛合金组织对力学性能的影响[A].第十二届中国有色金属学会材料科学与合金加工学术研讨会文集[C]. 北京:2007.
［2］Jame M D, Paul M N. Tech spotlight air\|fame and landing gear alloy[J].Advanced Materials and Processes, 1999, 17(3):23-25.
［3］Hemphill R M. A high strength toughness alloy for tooling and forging[J].Forging Steels,1995,(5):191-191.
［4］Kang C G,Bae J W. Numerical simulation of mold filling and deformation behavior in rheology forming process[J].Mechanical Sciences,2008, (50): 944-955.
［5］赵建国.TC21合金的热变形行为及其组织演变[D].大连:大连理工大学,2008.
［6］李兴无,沙爱学,张旺峰,等.TAl5合金及其在飞机结构中的应用前景[J].钛工业进展,2003,20(4):91-94.
［7］彭艳萍,曾凡昌,王俊杰,等.国外航空钛合金的发展应用及其特点分析[J].材料工程,1997,1(10):3-6.
［8］Songwon Seo, Oakkey Min, Hyunmo Yang. Constitutive equation for Ti-6Al-4V at high temperatures measured using the SHPB technique[J].International Journal of Impact Engineering,2005,1（31）: 735-754.
［9］李渭清,冯永琦,王鼎春，等.镦粗变形工艺对TC18 组织和性能的影响[J].钛工业进展,2008,25(4):24-26.
［10］王晓燕,郭鸿镇，袁士翀,等.等温锻造温度对TCl8钛合金组织性能的影响[J].锻压技术,2008,33(3):8-10.
［11］赵为纲,李鑫,鲁世强，等.TC11钛合金高温变形本构关系研究[J].塑性工程学报,2008,15(3):124-126.
［12］纪仁峰，闵新华,胡弘剑，等.TA15钛合金高温塑性变形流变应力变形行为研究[J].稀有金属与硬质金,2009,37(2):12-17.
［13］易幼平,杨积慧,蔺永诚.7050铝合金热压缩变形的流变应力本构方程[J].材料工程,2007,(4):20-22.
［14］李红恩,沙爱学.TCl8钛合金热压参数对流动应力与显微组织的影响[J].材料工程,2010,(1):85-88.
［15］黄伯云, 李成功,石力开，等.中国材料工程大典：第4卷有色金属材料工程(上)[M].北京:化学工业出版社,2006.

服务与反馈：

【文章下载】【加入收藏】