Molded steel pouring process

Abstract

The invention discloses a molded steel pouring process. During pouring, the pouring speed is finely adjusted in good time according to the rising condition of the liquid level of an ingot mold; the feeding time of a riser is shortened by about 10% compared with that of an original process, the heat capacity value of the molten steel temperature of the riser is increased, and secondary shrinkage cavities of steel ingots and removal of gas and impurities are facilitated; and in the later period of riser feeding, heating agent adding is omitted, the time for adding a covering agent is advanced by 1-2 minutes, the effect of preserving heat in advance is achieved, meanwhile, the production cost is reduced, and environmental pollution caused by adding the heating agent is eliminated. In particular, it is worth mentioning that the yield of the molded steel is increased for the subsequent process (forging pressing or forging). Mainly, the utilization rate of the riser can reach 20%-30%. However, the utilization rate of the riser is almost zero in the original process of adding the heating agent. Therefore, the economic benefit and the social benefit of the casting process are remarkable.

Description

technical field [0001] The invention relates to the field of die-casting steel ingots, in particular to a pouring process for die-casting steel. Background technique [0002] In the traditional "three-stage" pouring process, in the case of the same steel type and ingot shape, the pouring time of the ingot body and the feeding time of the riser are relatively fixed. Moreover, the feeding time of the riser is too long, so that the secondary oxidation of the molten steel is serious, which affects the internal quality of the steel. Secondly, the longer the feeding time of the riser, the faster the cooling of the molten steel passing through the nozzle, the lower the temperature and heat capacity of the molten steel at the riser, the worse the effect on the precipitation of gas and inclusions, and the feeding effect on die cast steel, The quality of molten steel inside the riser and the yield of forged products have certain influences. [0003] Regardless of the traditional tex...

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Problems solved by technology

[0005] But the heat released is not completely generated in the vacuum container, a considerable part is dissipated in the atmosphere

That is to say, the released heat is not absorbed by the molten steel in the riser, and is lost in the atmosphere, causing environmental pollution

Therefore, we think that the effect of the added heating agent on the riser lock is not as good as imagined, and it also brings many adverse effects

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