摘要
以某型号TC4钛合金双沟槽截面机匣环件为研究对象,在轧制实验中发现其外台阶表面容易发生开裂,严重影响产品质量。为解决这一问题,从环件成形过程中的温度状态、应力状态和变形状态3个方面分析其开裂原因,结果表明,温度下降和变形量过大是导致开裂的主要原因,而变形量对开裂的作用效果还受应力状态的影响。然后从控温角度出发,分析了初轧温度和芯辊进给速度对开裂的影响,发现仅通过调整工艺参数难以完全避免开裂问题;进一步从工艺流程入手,提出多火次成形的工艺优化方法,并结合有限元模拟确定了具体的工艺参数和轧制方案;最后再次进行轧制实验,外表面开裂问题基本得到解决,验证了所提出的工艺优化方法的可行性。
Taking a certain type of TC4 titanium alloy double-groove section casing ring as the research object,it is found in rolling experiments that surface cracking frequently occurs on the outer step,significantly compromising product quality.To address this issue,the cracking causes were analyzed from three aspects:temperature conditions,stress state and deformation state during the forming process of ring.The results show that excessive temperature drop and deformation amount are the primary factors leading to cracking,while the action effect of deformation amount on cracking is further influenced by the stress state.Subsequently,from the temperature control perspective,the effects of initial rolling temperature and mandrel feed speed on cracking were analyzed.It is found that merely adjusting process parameters is insufficient to eliminate cracking.Therefore,based on process flow,a multi-pass forming strategy was proposed.Finite element simulations were employed to determine the specific process parameters and rolling scheme.Finally,rolling experiment was conducted again,and outer surface cracking was effectively mitigated,validating the feasibility of the proposed optimization method.
作者
狄亮
邓加东
钱东升
兰箭
丁佐军
万剑平
DI Liang;DENG Jia-dong;QIAN Dong-sheng;LAN Jian;DING Zuo-jun;WAN Jian-ping(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Engineering Research Center for Green Precision Material Forming,Wuhan University of Technology,Wuhan 430070,China;Wuxi Paike New Materials Technology Co.,Ltd.,Wuxi 214161,China)
出处
《塑性工程学报》
北大核心
2025年第11期84-92,共9页
Journal of Plasticity Engineering
基金
国家重点研发计划(2022YFB3705500)
国家自然科学基金资助项目(52475397)
绿色轻工材料湖北省重点实验室开放基金资助项目(202409A03)。
关键词
TC4钛合金
环件轧制
锻造开裂
工艺优化
TC4 titanium alloy
ring rolling
forging cracking
process optimization
