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GH4720Li高温合金热加工工艺研究
Study on Hot Working Technology of GH4720Li Superalloy
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- DOI:
- 作者:
- 田喜明 1 ，史蒲英 2 ，李 坤 2 ，孙小平 2，3 ，王凯旋 2 ，景建发 2，4
TIAN Ximing1 , SHI Puying2 , LI Kun2 , SUN Xiaoping2,3, WANG Kaixuan2 , JING Jianfa2,4
- 作者单位:
- 1. 海军装备部，陕西 西安 710021；2. 西部超导材料科技股份有限公司 陕西省航空材料工程实验室，陕西 西安 710018； 3. 西北工业大学材料学院，陕西 西安 710072；4.中南大学 资源加工与生物工程学院，湖南 长沙 410083
1. Naval Equipment Department, Xi'an 710021, China; 2. Shaanxi Aviation Materials Engineering Laboratory, Western Superconducting Materials Technologies Co., Ltd., Xi'an 710018, China; 3. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China; 4. School of Resource Processing and Bioengineering, Central South University, Changsha 410083, China
- 关键词:
- GH4720Li 合金；轧制；棒材；工艺
GH4720Li alloy; rolling deformation; bar; processing
- 摘要:
- 从热力学角度，分析了 GH4720Li 合金中各个相的析出规律。 依据热处理试验结果，确定了合适的加工温
度范围；依据轧制过程数值模拟结果，获得了可行的轧制道次变形量匹配。 结果表明，热加工温度不应超过 1 160 ℃；在
1 140 ℃加热条件下，单次轧制加工变形量不超过 30%；试验棒材的晶粒度为 8~9 级，其力学性能满足标准要求。
The precipitation law of each phase in GH4720Li alloy was analyzed from the thermodynamic point of view. According to the heat treatment test results, the appropriate processing temperature range was determined. According to the numerical simulation results of rolling process, the feasible deformation matching of rolling passes was obtained. The results show that the hot working temperature should not exceed 1 160 ℃. Under the heating condition of 1 140 ℃, the single rolling deformation is less than 30%. The grain size of the sample is 8~9 grade, and its mechanical properties meet the standard requirements.