浅谈铸轧生产中降低铝熔损的方法

铝加工生产过程中的加料方法、炉子工况、扒渣操作、工艺废品及炉渣处理等因素,均能造成金属熔损增加,影响产品质量,增加生产成本。文章针对以上问题,分析各影响因素,并给出了相应的解决方法。

Review on corrosion-wear resistance performance of materials in molten aluminum and its alloys

The failure caused by the corrosion-wear of molten aluminum and its alloys is one of the main problems in aluminum industry. In this work, the resistance behavior of various materials, including Fe-based alloys, ceramics and corresponding high apparatus of corrosion-wear in molten aluminum and its alloys, were reviewed. The synergistic effect of corrosion and wear was discussed based on corrosion and wear mechanics. The effects of dynamic agitation due to rotating of friction pairs, physical property of liquid metal and size of grain etc., on the corrosion-wear resistance performance were investigated. In addition, the characteristics of corrosion-wear resistance performance of materials in molten aluminum and its alloy were summarized. According to our recent progress referred to kinds of materials, especially a TiA13/Ti3A1C2/A1203 composite, the ceramics/metal composites with a co-continuous structure will be of great advantage in the field of corrosion-wear environment of molten aluminum and its alloys.

硅含量对H13模具钢CrAlSiN镀膜组织和性能的影响

在模具钢H13表面分别电镀4种硅含量为1.6%、4.4%、7.5%、10.8%的CrAlSiN薄膜。利用X光绕射分析仪、场发射扫描电镜、原子力显微镜、压痕实验仪与磨耗试验机对不同硅含量镀膜进行组织和性能的分析。通过在680℃A380铝合金溶液中浸泡,分析模具钢H13薄膜的抗热侵蚀性。结果表明:4种不同硅含量的CrAlSiN镀膜均为CrN单相柱状晶结构,晶粒尺寸随硅含量增加而减小;较低硅含量的CrAlSiN薄膜具有较低的硬度与较高的表面粗糙度,较高硅含量的CrAlSiN薄膜具有较高的硬度与弹性系数,表面粗糙度低并具有较低的摩擦系数;硅含量4.4%的CrAlSiN薄膜具有较佳的耐铝侵蚀能力。