工艺参数对阻燃钛合金包套挤压影响的数值模拟
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摘要
将铸态Ti-35V-15Cr-0.3Si-0.1C阻燃钛合金高温变形时的流动应力耦合到DEFORM-2D软件中,对该合金大规格铸锭包套挤压过程进行了热力耦合数值模拟,获得了不同加热温度、变形速度、摩擦因子和模角结构下工件温度场、等效应力场和等效应变场,分析了不同变形下的载荷位移曲线。结果表明,提高变形温度、降低变形速度、增大钛合金铸锭与钢包套之间摩擦因子、减小钢包套与模具间摩擦因子、减小模角有利于包套挤压过程的完成。
Coupling the flow stress of as-cast Ti-35V-15Cr-0.3Si-0.1C burn resistant titanium alloy into DEFORM-2D software in hot deformation,thermomechanical coupled numerical simulation of large size ingot was carried out in package extrusion process.The temperature field,equivalent stress field and equivalent strain field of workpiece were obtained under different heating temperatures,deformation velocity,friction factor and die angle structure.The load displacement curves under different deformations were analyzed.The results show that:improving extrusion temperature,reducing deformation velocity,increasing friction factor between titanium alloy ingot and steel sheathing,decreasing friction factor between steel sheathing and die,and decreasing die angle are conducive to the completion of the sheathed extrusion process.
Coupling the flow stress of as-cast Ti-35V-15Cr-0.3Si-0.1C burn resistant titanium alloy into DEFORM-2D software in hot deformation,thermomechanical coupled numerical simulation of large size ingot was carried out in package extrusion process.The temperature field,equivalent stress field and equivalent strain field of workpiece were obtained under different heating temperatures,deformation velocity,friction factor and die angle structure.The load displacement curves under different deformations were analyzed.The results show that:improving extrusion temperature,reducing deformation velocity,increasing friction factor between titanium alloy ingot and steel sheathing,decreasing friction factor between steel sheathing and die,and decreasing die angle are conducive to the completion of the sheathed extrusion process.
引文
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[7]曾卫东,周义刚,舒滢,等.基于加工图的Ti-40阻燃钛合金热变形机理研究[J].稀有金属材料与工程,2007(1):1-6.
[8]孙欢迎,曹京霞,王宝,等.应用加工图技术优化阻燃钛合金高温变形工艺[J].稀有金属材料与工程,2012,42(11):2351-2355.
[9]刘宗煜,王克鲁,鲁世强,等.挤压温度对Ti40包套挤压过程影响规律的数值模拟[J].热加工工艺,2011,40(9):80-83.
[10]朱艳春,曾卫东,彭雯雯,等.Ti40合金热压缩变形过程的开裂行为研究[J].稀有金属材料与工程,2013,42(10):2088-2092.
[2]孙欢迎,曹京霞,王宝,等.铸态阻燃钛合金的热加工图与变形机制研究[J].稀有金属材料与工程,2012,42(12):2541-2546.
[3]Hansen J O,Sound H,Novotnak D,et al.Heat Treatment to Reduce Embrittlement of Titanium Alloys:US,539740[P].1995-03-14.
[4]Seagle S R.The state of the USA titanium industry in 1995[J].Materials Science and Engineering A,1996,213:1-7.
[5]Boyer R R.An overview on the use of titanium in the aerospace industry[J].Materials Science and Engineering A,1996,213:103-114.
[6]赖运金,张维,王晓亮,等.WSTi3515S阻燃钛合金的工程化制备及力学性能研究[J].钛工业进展,2015,32(6):13-18.
[7]曾卫东,周义刚,舒滢,等.基于加工图的Ti-40阻燃钛合金热变形机理研究[J].稀有金属材料与工程,2007(1):1-6.
[8]孙欢迎,曹京霞,王宝,等.应用加工图技术优化阻燃钛合金高温变形工艺[J].稀有金属材料与工程,2012,42(11):2351-2355.
[9]刘宗煜,王克鲁,鲁世强,等.挤压温度对Ti40包套挤压过程影响规律的数值模拟[J].热加工工艺,2011,40(9):80-83.
[10]朱艳春,曾卫东,彭雯雯,等.Ti40合金热压缩变形过程的开裂行为研究[J].稀有金属材料与工程,2013,42(10):2088-2092.