Transactions of Materials and Heat Treatment

Title：Application of response surface method in controlling of microstructural quality for large forging

Authors： Qiao Xu′an

Unit： Chongqing Creation Vocational

KeyWords： T-shaped large forging homogeneity of microstructure response surface method aluminum alloy 7050 subsection and multi-passes forming

ClassificationCode：TG316

year,vol(issue):pagenumber：2016,41(12):26-31

Abstract：

For the forming process with subsection and multi-passes of a T-shaped forging part, the controlling homogeneity of step-shaped and discontinuous-deformed microstructure was studied by the mathematical and statistical tool, namely response surface method (RSM), and the process condition of the first step was parameterized. Then, the evaluation objective of improving microstructural quality was established by the combination of RSM and FEM, and the second-order response surface model based on its design variables of billet temperature, press velocity, angle of up die was given. Furthermore, the regulation between design variable and evaluation objective was researched by Matlab software to obtain the optimal forging process and parameters with temperature of billet 440 ℃,press velocity 8 mm·s-1 and angle of up die 160°, namely three passes forming process. Finally, the numerical simulation results for large forging part were verified by production, and the internal organization was uniform by metallographic analysis. Thus, RSM and FEM can control the process of multiple passes and steps forming process effectively.

Funds：

重庆市教委科学技术研究项目（KJ1505301）

作者简介：乔旭安(1977-)，男，本科，讲师 E-mail：profzf@163.com

Reference：

［1］Yang H，Li L X，Wang Q D. Research on the development of advanced forming for lightweight alloy materials area
［J］．Journal of Mechanical Engineering，2010，46 (12): 31 -42．

［2］Clarka D A，Johnson W S. Temperatures effects on fatigue perform of cold expanded holes in 7050-T7451 aluminum alloy
［J］.International Journal of Fatigue，2003，25(2): 159-165．

［3］Deng L，Wang X Y，Xia J C，et al．Microstructural modeling and simulation of Al-2.8Cu-1.4Li alloy during elevated temperature deformation
［J］. Metallurgical and Materials Transactions A，2011，42A ( 8): 2509-2515.

［4］Liu G，Wang Q，Ao Y．Convenient formulas for modeling three-dimensional thermo mechanical asperity contacts
［J］．Tribology International，2002，35(7): 411-423．

［5］Zhang D W，Yang H，Sun Z C．Analysis of local loading forming for titanium alloy T-shaped components using slab method
［J］．Journal of Materials Processing Technology，2010，210(2):258-266.

［6］孙志超，杨合，李志燕. TAl5 合金H型构件等温局部加载成形工艺研究
［J］．稀有金属材料与工程，2009，38(11):1904-1909.

Sun Z C, Yang H, Li Z Y. H-shaped component isothermal local loading forming of TA15 titanium alloy
［J］. Rare Metal Materials and Engineering,2009，38（11):1904-1909.

［7］李志燕，杨合，孙志超，等. TA15钛合金大型复杂构件等温局部加载过渡区宏微观变形研究
［J］. 稀有金属材料与工程，2008，37(9): 15-20.

Li Z Y, Yang H, Sun Z C, et al. Research on marco-microcosmic deforming in isothermal local loading transition region for large-scale complex integral components of TA15 titanium alloy
［J］. Rare Metal Materials and Engineering，2008，37(9): 15-20.

［8］韩冠军，杨合，樊晓光，等. TA15合金大型筋板件等温局部加载晶粒尺寸演化研究
［J］. 塑性工程学报，2009，16(5)：118-123.

Han G J, Yang H, Fan X G, et al. Numerical simulation of microstructure evolution of TA15 alloy large-scale rib-web parts during isothermal local loading process
［J］. Journal of Plasticity Engineer, 2009，16(5)：118-123.

［9］Zhou J，Xiao C，Yu Y Y，et al. Influence of tool parameters on tool wear in two-rolled cross wedge rolling
［J］. International Journal of Advanced Manufacturing Technology，2013,65(5)：745-753.

［10］原红玲，王可胜．基于响应面法的大型铝合金锻件的多目标成形优化
［J］．锻压技术，2014，39(6):151-156．

Yuan H L，Wang K S．Multi-objective optimization of forming process for large-scale Al alloy forging based on RSM
［J］．Forging & Stamping Technology,2014,39(6):151-156．

［11］Montgomery D C. Design and Analysis of Experiments
［M］.New York: John Wiley,1984.

Service：

【This site has not yet opened Download Service】【Add Favorite】