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| 锡青铜阀体铸造工艺的数值模拟研究 |
| Numerical Simulation of Tin Bronze Valve Casting Process |
| Received:April 16, 2024 |
| DOI：10.3969/j.issn.1674-6457.2024.12.021 |
| 中文关键词: 数值模拟 铸造 阀体 Procast 锡青铜 正交试验 |
| 英文关键词: numerical simulation casting valve Procast tin bronze orthogonal experiment |
| 基金项目:宁波市重大专项(2022Z057) |
| Author Name | Affiliation | | LI Linhan | School of Materials Science and Engineering, Central South University, Changsha 410083, China | | WANG Chunge | School of Materials Science and Engineering, Central South University, Changsha 410083, China
Ningbo Institute of Technology, Zhejiang University, Zhejiang Ningbo 315100, China
Ningbo Huacheng Valve Co., Ltd., Zhejiang Ningbo 315100, China | | XIAO Zhu | School of Materials Science and Engineering, Central South University, Changsha 410083, China | | JIANG Yanbin | School of Materials Science and Engineering, Central South University, Changsha 410083, China | | WANG Chaoyang | Ningbo Huacheng Valve Co., Ltd., Zhejiang Ningbo 315100, China | | ZHU Yunxia | Ningbo Huacheng Valve Co., Ltd., Zhejiang Ningbo 315100, China |
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| 中文摘要: |
| 目的 针对薄壁阀体难以通过加工的方式精密成形的问题，研究锡青铜薄壁阀体的铸造成形工艺，探究不同浇注方案下的充型、凝固规律，提出合理的铸造工艺方案。方法 基于锡青铜(C83600)的热物理性能和薄壁阀体铸件的几何特征，设计了顶注雨淋式浇注系统，通过改变散热方式、利用正交试验等方法研究铸造工艺参数、优化浇注系统，探究不同浇注工艺的铸件质量。结果 本铸件在顶注式浇注系统下呈现良好的顺序凝固特征，但不均匀的薄壁恶化了铸件质量，通过调整浇注工艺和浇注系统设计，铸件质量得到有效改善。对正交试验的试验结果进行极差分析，发现浇注温度对铸件质量的影响最大，浇注速度次之，砂型预热温度的影响最小。将内浇道调整到6个厚内角区域，增设冷铁后，以浇注温度为1 140 ℃、浇注速度为1.0 kg/s、砂型预热温度为150 ℃的浇注参数组合进行浇注，铸造完成后空冷的铸件质量最好。结论 优化浇注系统设计，调整合适的浇注温度、浇注速度和砂型预热温度能有效提高铸件的质量，便于铸件一次成形。 |
| 英文摘要: |
| In order to solve the problem that the thin-walled valve is difficult to be precisely formed by processing, the work aims to study the casting process of the tin bronze thin-walled valve to explore filling rule and solidification sequence under different pouring schemes and propose a reasonable casting process scheme. Based on the thermophysical properties of tin bronze (C83600) and the geometric characteristics of thin-walled valve, a top gating system was designed, and the casting quality of different casting processes was explored by changing the heat dissipation, studying the casting process parameters by orthogonal experiments, and optimizing the pouring system. Good sequential solidification characteristics appeared under the top grating system, but uneven thin-walled deteriorated the casting quality, which could be effectively improved by adjusting the gating process and gating system. The orthogonal experiment results were subject to range analysis and the pouring temperature had the greatest effect on the quality of the casting, followed by the pouring speed, and the preheating temperature. The inner runners distributed in six thick inner corner areas, with the addition of chiller, and under the pouring temperature of 1 140 ℃, pouring speed of 1.0 kg/s, and preheating temperature of 150 ℃, the quality of air-cooled casting was the best.Optimizing the design of the gating system and adjusting the appropriate pouring temperature, pouring speed and preheating temperature can effectively improve the quality of castings and contribute to once forming of castings. |
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