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当前位置:不锈钢铸件含碳量过高分析
[来源:www.] [作者:精密铸造] [日期:19-04-01]

含碳量过高会造成合金钢铸件成为不良产品,造成资源的浪费,很多人并不了解其中的原因,我们只有了解了它产生的原因,才能采取措施避免它,接下来为大家介绍一下合金钢铸件含碳量过高的原因: Carbon content is too high can cause alloy steel castings become bad product, wastes the resources, a lot of people don't know the reason, we only know the cause of it, to take measures to avoid it, then to introduce the cause of the high carbon alloy steel castings: 1、合金钢铸件的浇注条件设置不合理:如浇注充型的流程设置过长,造成浇注过程中浇注钢液温度低,特别是对铸件壁厚增大位置,浇注钢液的凝固速度慢,造成液相—固态停留时间较长,促使了钢液与模样热分解产物的作用时间增长,加大了铸钢件的渗碳与积碳量。 1, alloy steel castings pouring conditions set unreasonable, such as casting filling process is too long, cause in the process of casting pouring molten steel temperature is low, especially for casting wall thickness increases, pouring liquid steel solidification speed is slow, causes the liquid - solid retention time is longer, prompted the liquid steel and shape the role of thermal decomposition product time growth, increase the carburizing steel and carbon deposition. 2、合金钢铸件的生产熔炼配料中碳含量未严格控制,特别是各种废钢中的含碳量和各种废钢中是否存在有其他合金成分的材料不明。 2, carbon content in the alloy steel castings production smelting ingredients not strict control, especially the carbon content in the all kinds of scrap steel and all kinds of scrap whether there are other alloy material is unknown. 3、合金钢铸件的浇注系统设置不合理:特别是抽真空系统与浇注砂箱或铸件浇注工艺造型的配置不合理,造成铸件在浇注过程中,浇注砂箱内的真空度不等、偏差过大,或实际真空度不足,而真空压力表显示又是符合技术参数要求的错误数值,使模样的热分解产物无法迅速快捷地排出浇注型腔,造成铸件的渗碳或积碳 3, alloy steel casting gating system setup is not reasonable, especially the vacuum system and casting sand box or casting pouring process model of configuration is not reasonable, cause in the process of casting, casting sand casting in vacuum range, the deviation is too large, or the actual vacuum degree is insufficient, and vacuum pressure gauge shows is to meet the requirements of technical parameters of error values, make the shape of the thermal decomposition product cannot quickly quickly get rid of casting mould, casting carburizing or carbon

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