Erosion Resistance of Heat-treated Aluminum Cast Iron to Aluminum Alloy Melt
Erosion Resistance of Heat-treated Aluminum Cast Iron to Aluminum Alloy Melt
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热处理铝铸铁对铝合金熔体的耐侵蚀性能
DOI：
10.11279/jfes.94.11
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
杉村 誠司
中科院分区：
文献类型：
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作者：
淺野 和典;山田 浩士;杉村 誠司
需要改进永久模具对铝合金熔体的耐侵蚀性。由于添加铝和热处理可在铸铁上形成化学和机械稳定的含铝氧化物的层，因此该层将改善铸铁在流动熔体中的抗侵蚀性。本研究制备了不同铝含量的铸铁，并对其进行热处理，使其表面形成氧化层。阐明了形成稳定层的最佳热处理条件和铸铁的冲蚀行为。在空气中进行热处理后，铸铁表面形成了一层由Fe2O3、Fe3O4和Al2O3等氧化物组成的氧化物层。根据铸铁的可铸性和渗层的形貌，得出在铸铁中加入3%的铝并在1173 K下热处理10 h是最合适的处理。热处理大大提高了铸铁的抗冲蚀性。在熔体中加入镁暂时减少了腐蚀时间，但当镁含量超过0.75%时，再次增加了腐蚀时间。
Improvement in the erosion resistance of permanent molds to aluminum alloy melt is required. Since chemically and mechanically stable layer containing aluminum oxides can be formed on the cast irons by aluminum addition and heat treatment, the layer would improve the erosion resistance of the cast iron in the running melt. In this study, cast irons with different aluminum contents were fabricated, then they were heat-treated to form the oxide layer on the surface. The optimum heat treatment conditions to form the stable layer and the erosion behavior of the cast irons were clarified. Heat treatment in air was found to result in the formation of a layer that consists of oxides, such as Fe 2 O 3, Fe 3 O 4 and Al 2 O 3 on the cast irons. Based on the castability of the cast irons and morphology of the layer, it was concluded that the addition of 3% aluminum in the cast iron and heat treatment at 1173 K for 10 hours was the most suitable treatment. The heat treatment drastically improved the erosion resistance of the cast iron. The addition of magnesium to the melt temporarily decreased the time to erosion, but increased the time to erosion again when more than 0.75% magnesium.