铸造技术2025，Vol.46Issue(5)：471-480,10.DOI:10.16410/j.issn1000-8365.2025.5031
超重力定向凝固熔铸炉的研制与实践
Development and Practice of Hypergravity Directional Solidification Furnace
摘要
Abstract
Hypergravity-assisted directional solidification is a promising technique for enhancing the mechanical properties of alloys.Under sufficiently high centrifugal-induced hypergravity acceleration,the melt undergoes a transition from laminar to turbulent flow before reverting to laminar flow,significantly affecting the thermal stability of the solidification front and,consequently,the microstructural evolution and mechanical performance of the alloy.To establish a controllable temperature gradient along the direction of centrifugal hypergravity,a multizone temperature regulation system was combined with an argon gas cooling system at the bottom of the crucible.A hypergravity directional solidification furnace was developed and experimentally evaluated,with tests conducted under 1g and 535g conditions to verify the feasibility of the proposed design for the hypergravity directional solidification casting furnace.By coupling the multizone temperature control method with the crucible bottom cooling method,control over the temperature gradient and cooling rate was achieved under hypergravity conditions.The mechanical property results of the samples indicate that the 535g sample exhibits significantly superior mechanical properties compared with those of the 1g sample,with the tensile strength increasing by approximately 18％and elongation improving by approximately 76％.These results validate the feasibility and effectiveness of the proposed system,demonstrating its significant advantages in refining solidified structures,optimizing alloy microstructures,and enhancing mechanical properties,thereby providing a novel approach for the preparation of high-performance materials.关键词
超重力/定向凝固/温度梯度/力学性能Key words
hypergravity/directional solidification/temperature gradient/mechanical property分类
金属材料引用本文复制引用
赵建江,王飞,陈云敏,韦华..超重力定向凝固熔铸炉的研制与实践[J].铸造技术,2025,46(5):471-480,10.基金项目
国家自然科学基金基础科学中心项目(51988101) （51988101）
