基于数值模拟的粉末冶金TiAl合金叶片模锻工艺研究

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摘要采用Deform-3D有限元软件对粉末冶金Ti-47Al-2Cr-2Nb-0.2W(摩尔分数,%)合金叶片的模锻工艺进行数值模拟研究,分析预热温度和上模速度对TiAl合金叶片锻件的等效应变场和等效应力场分布以及上模载荷的影响。结果表明,随预热温度升高和上模速度减小,叶片锻件的等效应变场和等效应力场分布更均匀,有利于提高叶片组织的均匀性。随着模锻过程的进行,由于TiAl合金加工硬化以及锻坯与模具间的摩擦增大,导致上模载荷不断增大,而预热温度升高和上模速度减小均使上模载荷显著降低。粉末冶金TiAl合金叶片模锻变形的最佳工艺参数为预热温度1 200 ℃、上模速度0.5 mm/s。

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	张强
	李慧中
	梁霄鹏
	陶慧

关键词 ：数值模拟, Deform-3D有限元软件, TiAl合金, 叶片, 模锻

Abstract：The die forging process of powder metallurgy Ti-47Al-2Cr-2Nb-0.2W (mole fraction, %) alloy blade was studied by the way of numerical simulation using Deform-3D finite element software. The effects of preheating temperature and upper die speed on the distribution of effective strain field and effective stress field, as well as the load of upper die were analyzed. The results show that with the increase of the preheating temperature and the decrease of the upper die speed, the distribution of the effective strain field and the effective stress field of the blade forgings becomes more uniform, which is beneficial to improve the uniformity of the blade microstructure. During the die forging process, due to the increase of TiAl alloy work hardening and the friction between the forging blank and the die, the load continues to increase, and the increase in the preheating temperature and the decrease of the upper die speed can significantly reduce the load of upper die. The optimal deformation process parameters of die forging for powder metallurgy TiAl alloy blade are preheating temperature of 1 200 ℃ and upper die speed of 0.5 mm/s.

Key words： numerical simulation Deform-3D software TiAl alloy blade die forging

收稿日期: 2020-12-16 出版日期: 2021-03-22

ZTFLH:

TG316.3

基金资助:国家自然科学基金资助项目(51774335); 中南大学中央高校基本科研业务费专项资金资助项目(1053320190443)

通讯作者: 李慧中,教授,博士。电话：0731-88830377;E-mail: lhz606@csu.edu.cn

引用本文:

张强, 李慧中, 梁霄鹏, 陶慧. 基于数值模拟的粉末冶金TiAl合金叶片模锻工艺研究[J]. 粉末冶金材料科学与工程, 2021, 26(1): 1-8.
ZHANG Qiang, LI Huizhong, LIANG Xiaopeng, TAO Hui. Research on die forging process of powder metallurgy TiAl alloy blade based on numerical simulation. Materials Science and Engineering of Powder Metallurgy, 2021, 26(1): 1-8.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2021/V26/I1/1

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