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Solving difficult problems in investment casting process of chilled iron
关键技术
key technology
该工艺技术的关键是在熔模精密铸造铸件热节处安放“铸造冷铁”，并保证冷铁在高温焙烧环境下不被氧化，在浇注时不与金属液接触。
The key of this technology is to place "cast chilled iron" at the hot spot of investment casting, and to ensure that the chilled iron is not oxidized under high temperature roasting environment and does not contact with liquid metal during pouring.
为了有效防止冷铁在950～1100℃的高温和长时间焙烧环境下不被氧化，同时，将钢液与冷铁隔离开，防止冷铁与钢液直接接触，应注重涂料的质量和涂敷质量。
In order to effectively prevent chilled iron from being oxidized in high temperature and long time roasting environment of 950-1100 C, at the same time, the liquid steel is separated from chilled iron, and the direct contact between chilled iron and liquid steel is prevented. The quality of coating and coating should be paid attention to.
我们研制的 “铸造冷铁”专用耐热涂料为水基涂料，其主要性能为：耐热温度为850～1300℃，密度为1.9～2.0g/cm3，外观为水性粘胶液体，涂覆用量为1.0～2.0m2/kg。
The special heat-resistant coating for Cast Chilled Iron developed by us is water-based coating. Its main properties are as follows: heat-resistant temperature is 850-1300 C, density is 1.9-2.0g/cm3, appearance is water-borne viscose liquid, coating dosage is 1.0-2.0m2/kg.
在试用该涂料过程中，采用浸涂的方法，涂层数为1～２层，涂层厚度为0.3～0.8mm，试用结果比较理想，成功地起到了防止冷铁氧化的作用。
During the trial application of the coating, the number of coatings is 1 to 2 layers, and the thickness of the coating is 0.3 to 0.8 mm. The result of the trial application is satisfactory, which successfully prevents the oxidation of cold iron.qieguji.75ix.com  xikuangji.75ix.com   xixiangji.75ix.com
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