锻压技术

GH4169合金大型机匣锻件的组织和力学性能

英文标题：Microstructure and mechanical properties of large-scale cartridge forgings for alloy GH4169

单位：1.贵州安大航空锻造有限责任公司 2.贵州省科学院 3. 哈尔滨工业大学(威海)材料科学与工程学院

分类号：TB31

出版年,卷(期):页码：2024,49(11):1-7

摘要：

系统研究了不同锻造工艺制备的GH4169合金大型机匣锻件的微观组织演变和力学性能。结果表明：普通工艺锻造的大型机匣锻件的晶粒度波动范围较大，在4.5~7.8级之间，平均晶粒度为6级；室温下锻件的Rm为1424 MPa，ReL为1200 MPa，A为24.0%，Z为36.0%；650 ℃下锻件的Rm为1120 MPa，ReL为975 MPa，A为21.0%，Z为64.5%。精化工艺锻造的大型机匣锻件的晶粒度波动范围较小，在7~8级之间，平均晶粒度为8级；室温下锻件的Rm为1447 MPa，ReL为1214 MPa，A为18.5%，Z为39.0%；650 ℃下锻件的Rm为1180 MPa，ReL为1030 MPa，A为32.5%，Z为64.0%。精化工艺锻造的大型机匣锻件的组织更加均匀、细小，综合力学性能表现优异，在提高材料利用率的同时满足GH4169合金大型机匣锻件组织性能验收要求。

The microstructures evolution and mechanical properties of large-scale cartridge forgings for alloy GH4169 prepared by different forging processes were systematically investigated. The results show that the grain size fluctuation range of the large-scale cartridge forgings forged by the ordinary process is relatively large, ranging from 4.5 to 7.8 level, with an average grain size of 6 level. At room temperature, Rm is 1424 MPa, ReL is 1200 MPa, A is 24.0% and Z is 36.0% of forgings. At 650 ℃, Rm is 1120 MPa, ReL is 975 MPa, A is 21.0% and Z is 64.5% of forgings. However, the grain size fluctuation range of the large-scale cartridge forgings forged by the refined process is relatively small, ranging from 7 to 8 level, with an average grain size of 8 level. At room temperature, Rm is 1447 MPa, ReL is 1214 MPa, A is 18.5% and Z is 39.0% of forgings. At 650 ℃, Rm is 1180 MPa, ReL is 1030 MPa, A is 32.5% and Z is 64.0% of forgings. Thus, the microstructure of the large-scale cartridge forgings forged by the refined process is more uniform and fine, with the excellent comprehensive mechanical properties, improving the material utilization rate and meeting the acceptance requirements for the microstructure and properties of large-scale cartridge forgings for alloy GH4169.

基金项目：

国家重点研发计划（2022YFB3706904）

作者简介：孙建国(1992-)，男，学士，工程师 E-mail：jianguo@mail.nwpu.edu.cn 通信作者：王松辉(1991-)，男，博士，工程师 E-mail：wangsonghui91@126.com

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