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影响重轨一级品率的主要原因是钢锭表面质量和钢锭中的大颗粒非金属夹杂。初轧钢坯断面尺寸控制得是否精确,也将影响钢轨的表面质量与定尺率。钢锭中的大颗粒非金属夹杂来自脱氧产物、浇铸过程的二次氧化及被侵蚀的耐火材料。下注重轨钢浇铸温度低是尾段头伤率高的主要原因。上注法生产的重轨,头伤率较低,但要掌握相当高的浇铸技术,低温快注是上注法的合适的操作方法,真空处理目前尚难普遍采用,较可行的还是喷粉或渣洗。保护浇铸,减少二次氧化也是减少夹杂的有效方法,不论是模铸还是连铸都很需要。
Affect the heavy rail first grade rate is mainly due to the ingot surface quality and large ingot non-metallic inclusions in the ingot. Whether the initial rolling billet section size control is accurate, will also affect the rail surface quality and scale rate. Large particles in steel ingot non-metallic inclusions from the deoxidation products, the secondary oxidation of the casting process and erosion of the refractory material. Under the focus on rail steel casting temperature is the end of the first paragraph of the main reason for the high rate of head injury. On the track production of heavy rail, head injury rate is low, but to master a very high casting technology, fast injection of low temperature is the appropriate method of injection method, vacuum treatment is currently difficult to commonly used, more feasible or dusting Or slag wash. Protect the casting, reducing secondary oxidation is also an effective way to reduce inclusions, whether it is casting or continuous casting are needed.