铸造2024，Vol.73Issue(6)：865-871,7.
ZL205A合金侧盖壳体铸造工艺研究与产品试制
Research of Casting Technology and Trial-Production of ZL205A Alloy Side Cover Shell
马文龙 1杨力 2杨小冬 1徐远财 2罗辉 1樊自田 2唐锦球1
作者信息
- 1. 江麓机电集团有限公司,湖南湘潭 411100
- 2. 华中科技大学材料成形与模具技术全国重点实验室,湖北武汉 430000
- 折叠
摘要
Abstract
In this paper,the filling,solidification process and defect characteristics of ZL205A alloy side cover shell castings under gravity casting and low pressure casting are simulated and analyzed,and the trial production and performance comparison of side cover shell castings are also conducted.When gravity casting is adopted,the simulation shows that the casting filling speed is fast,the phenomenon of turbulence and mixed flow is serious,the solidification rate is slow and the process is chaotic,and the porosity is high.The defects of shrinkage and segregation on the surface and inside of the sample are serious,and the micro-shrinkage and composition segregation are interwoven in the matrix and grain boundaries.The average tensile strength and elongation of the sampling site are 400 MPa,3.1％in zone A and 444 MPa,3.4％in zone B,indicating that the casting is unqualified.When using low pressure casting,the simulation shows that the mold filling is stable,the solidification rate is fast and the porosity is low.The sample is qualified in inspection,the microstructure is uniform and dense,and the proportion of micro-shrinkage and segregation is significantly reduced.The average tensile strength and elongation of the sampling site are 478 MPa,4.7％in zone A and 484 MPa,4.9％in zone B.The casting is qualified and has excellent performance.The adaptability and advantages of low pressure casting process to ZL205A alloy side cover shell casting are verified.关键词
ZL205A/铸造/侧盖壳体/组织结构/力学性能Key words
ZL205A/cast/side cover shell/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
马文龙,杨力,杨小冬,徐远财,罗辉,樊自田,唐锦球..ZL205A合金侧盖壳体铸造工艺研究与产品试制[J].铸造,2024,73(6):865-871,7.
