锻压技术

GH4169合金大型异形环锻件近净成形技术

英文标题：Near net forming technology on large special-shaped ring forgings of alloy GH4169

分类号：TG306

出版年,卷(期):页码：2025,50(1):140-147

摘要：

研究近净成形锻造工艺制备出的GH4169合金大型机匣异形环锻件的微观组织演变和力学性能。采用三维扫描仪对实际锻件尺寸进行三维扫描，在与实际锻造过程基本一致的条件下使用有限元分析对锻件成形过程进行可视化展示，判断锻造过程中存在的问题，进而优化工艺。结果表明：近净成形锻造工艺可以获得细小均匀的晶粒度，环锻件组织均匀性较好，晶粒度分布在7~8级之间，平均晶粒度为8级。其室温抗拉强度为1447 MPa，屈服强度为1214 MPa，断后伸长率为18.5%，断面收缩率为39%；650 ℃高温下抗拉强度为1180 MPa，屈服强度为1030 MPa，断后伸长率为32.5%，断面收缩率为64%，具有优异的综合力学性能，满足某型号GH4169合金机匣锻件的组织性能验收要求。

The microstructure evolution and mechanical properties of large casing special-shaped ring forgings of alloy GH4169 were studied by near net forming forging process. The actual forgings size was scanned by 3D scanner. Then, under the condition that it was basically consistent with the actual forging process, the forming process of forgings was visualized by finite element analysis, and the problems existing in the forging process were determined. Furthermore, the forging process was optimized. The results show that the fine and uniform grain size is obtained by the near net forming forging process, the microstructure uniformity of ring forgings is better, the grain size distribution is between 7 and 8 grades, and the average grain size is 8 grades. At room temperature, the tensile strength is 1447 MPa, the yield strength is 1214 MPa, the elongation after fracture is 18.5%, and the section shrinkage is 39%. However, at the high temperature of 650 ℃, the tensile strength is 1180 MPa, the yield strength is 1030 MPa, the elongation after fracture is 32.5%, and the section shrinkage is 64%, showing the excellent comprehensive mechanical properties and meeting the acceptance requirements for the microstructure performance for a certain type of casing forgings of alloy GH4169.

基金项目：

国家重点研发计划（2022YFB3706904）

作者简介：王松辉（1991-），男，博士，工程师 E-mail：wangsonghui91@126.com 通信作者：苏春民（1977-），男，学士，研高工 E-mail：suchunmin@126.com

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