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输电设备耐热铝合金在不同铸造工艺下的性能研究
Study of Mechanical Properties of Heat Resistant Aluminum Alloy for Transmission Equipment Under Different Casting Technology
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- DOI:
- 作者:
- 石磊 郑成博 尹洪泉 梁凤敏 董博
SHI Lei;ZHENG Chengbo;YIN Hongquan;LIANG Fengmin;DONG Bo
- 作者单位:
- 国网冀北电力有限公司 河钢集团唐钢公司
North China Electric Power University,Tangshan 063000,China;Hebei Steel Group Tangshan Iron and Steel Co., Ltd., Tangshan 063000,China
- 关键词:
- 耐热铝合金 挤压铸造 重力铸造 高温力学性能 输电设备
heat aluminum alloy squeeze casting gravity casting high temperature mechanical properties power transmission equipment
- 摘要:
- 通过拉伸试验机、光学显微镜以及扫描电镜,对比变电站输电设备用耐热铝合金材料在挤压和重力铸造中的高温力学性能。试验表明:同重力铸造合金比较,孔洞和针状Al7CuFe相在挤压铸造合金中都有所减少,块状Al9FeNi相也变得细小和弥散;挤压铸造合金经热处理后在300℃下的抗拉强度、屈服强度和伸长率相比于重力铸造合金均有所提高。High temperature mechanical properties of heat resistant aluminum alloy used in transmission equipment in squeezing and gravity casting were compared by tensile testing machine, optical microscope and scanning electron microscope. It is shown that the gravity casting alloy, holes and acicular phase in Al7CuFe alloy in squeezing casting has been reduced, blocky Al9FeNi phase became fine and dispersion;squeeze casting alloy after heat treatment at 300 DEG C,its tensile strength, yield strength and elongation compared to gravity casting alloy were improved.