采用SHP34-500A多功能液态成型机试生产了水雷壳体用ZAlSi7Mg铝合金隔板件，研究了不同比压、浇注温度和保压时间下铸件组织和力学性能的变化。结果表明，随着比压和保压时间的增加以及浇注温度下降，铸件的晶粒尺寸呈现减小的趋势。最佳工艺参数是比压为130 MPa、浇注温度为720℃、保压时间为20 s。从挤压的铸件本体取样，其抗拉强度达209.9 MPa，屈服强度达121.8 MPa，伸长率达10.3%；经过热处理后铸件抗拉强度达259 MPa，屈服强度达179.6 MPa，伸长率达11.8%。
Abstract
The SHP34-500A multifunctional liquid forming equipment was utilized to trial-produce ZAlSi7Mg aluminum alloy diaphragm for mine shells, and the structure evolution and mechanical properties of the castings at different specific pressures, pouring temperatures and pressure holding times were investigated. The results indicate that with the increase of the specific pressure and holding time, and the decrease of the pouring temperature, the grain size of the casting presents a decreasing trend. After optimization, the optimal squeeze casting process parameters are specific pressure of 130 MPa, pouring temperature of 720℃, and holding time of 20 s, where the tensile strength, yield strength and elongation reach 209.9 MPa, 121.8 MPa, and 10.3%, respectively, after casting body sampling. After heat treatment, the tensile strength, yield strength and elongation are 259 MPa, 179.6 MPa, and 11.8%, respectively.
关键词
挤压铸造 /
工艺参数 /
ZAlSi7Mg合金 /
力学性能
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Key words
Squeeze Casting /
Process Parameters /
ZAlSi7Mg Alloy /
Mechanical Properties
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参考文献
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脚注
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基金
国家自然科学基金资助项目（52074246，22008224）；国防基础科研资助项目（JCKY2020408B002）；山西省科技重大专项资助项目（20191102008，20191102007）；山西省研究生教育创新资助项目（2020BY093，2020SY356）；山西省高等学校科技创新计划资助项目（2020L0280）；中北大学科学研究基金资助项目（XJJ201909）；中北大学研究生科技立项资助项目（20201708）
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