Improvement process of pouring control method for wind power nodular cast iron hub

Abstract

The invention provides an improved process of a casting control method of a wind power ductile iron wheel hub. The improved process comprises the steps that (1) ladle repairing is performed; (2) smelting raw materials are smelted into molten iron and scum is removed; (3) a spheroidizing agent is arranged in a ladle, the molten iron is poured into the ladle to be spheroidized, and spheroidized slagis removed; (4) the molten iron surface is covered with a mixed thermal insulating agent, wherein the mixed thermal insulating agent is prepared by mixing a slag remover and a heat-insulating covering agent according to a mass ratio of 1 to (0 to 2); and (5) a casting is poured. The improved process mainly prevents slag inclusion of the wind power ductile iron wheel hub casting and solves the problem of the temperature control over the molten iron by changing a smelting pouring process, and equipment is cleaned before smelting the molten iron to prevent primary slag from entering a casting mold; and the molten iron surface is covered with the mixed thermal insulating agent so that spheroidization degradation can be avoided and the temperature drop of the molten iron is effectively prevented from being too fast, the mixed thermal insulating agent after matching can meet the requirement of direct pouring of the molten iron without repeated slag removal, and the production efficiency isimproved.

Description

technical field [0001] The invention relates to a metallurgical pouring process method, in particular to a slag-retaining and temperature control method for nodular cast iron pouring. Background technique [0002] Ductile iron is a high-strength cast iron material developed in the 1950s. Its comprehensive properties are close to those of steel. More demanding parts. Ductile iron has developed rapidly and has become a cast iron material second only to gray cast iron. At present, the fields involved in ductile iron include wind power generation, nuclear industry, auto parts and other manufacturing fields. The development momentum of ductile iron materials is strong, the technological change is rapid, and the quality of castings is stable. Many experts, scholars, and front-line technicians have developed many new technologies through experiments. The technological development of domestic ductile iron has reached a very high level. Nevertheless, nodular cast iron still faces...

AI Technical Summary

Problems solved by technology

However, in the actual use process, it was found that although the thermal insulation covering agent can solve the problem of heat preservation of cast iron and the purity of molten iron, it is easy to adhere to the wall of the molten iron ladle after sintering, which brings great difficulty to subsequent cleaning.

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