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不鏽鋼鑄件含碳量過高是什麽原因?
[作者:aoutmy] [日期:18-01-27] [瀏覽次數:] [來源:http://www.mobiinet.com]

碳量過高會造成合金鋼鑄件成為不良產品,造成資源的浪費,很多人並不了解其中的原因,ag8亚游隻有了解了它產生的原因,才能采取措施避免它,接下來為大家介紹一下合金鋼鑄件含碳量過高的原因:
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、合金鋼鑄件的澆注條件設置不合理:如澆注充型的流程設置過長,造成澆注過程中澆注鋼液溫度低,特別是對鑄件壁厚增大位置,澆注鋼液的凝固速度慢,造成液相—固態停留時間較長,促使了鋼液與模樣熱分解產物的作用時間增長,加大了鑄鋼件的滲碳與積碳量。
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、合金鋼鑄件的生產熔煉配料中碳含量未嚴格控製,特別是各種廢鋼中的含碳量和各種廢鋼中是否存在有其他合金成分的材料不明。
2. There is no strict control of the carbon content in the production of alloy steel castings, especially the carbon content of various scrap steel and the existence of other alloy components in various scrap steel.

 

 
3、合金鋼鑄件的澆注係統設置不合理:特別是抽真空係統與澆注砂箱或鑄件澆注工藝造型的配置不合理,造成鑄件在澆注過程中,澆注砂箱內的真空度不等、偏差過大,或實際真空度不足,而真空壓力表顯示又是符合技術參數要求的錯誤數值,使模樣的熱分解產物無法迅速快捷地排出澆注型腔,造成鑄件的滲碳或積碳。
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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