Short-process manufacturing method for producing casting for wind power generation equipment

Abstract

The invention provides a short-process manufacture method for producing a casting for wind power generation equipment and relates to manufacture of cast iron alloy. The manufacture method is a short-process manufacture process for producing the thick-large-section casting used for the wind power generation equipment. The short-process manufacture method comprises the steps that molten iron obtained through sintering of iron ore and blast furnace smelting reduction is poured into a medium-frequency induction electric furnace after being subjected to dephosphorization and desulfuration treatment, and scrap steel and foundry returns are added for continued smelting, meanwhile the components of the molten iron are adjusted; then spheroidization and inoculation treatment is conducted; and finally forming is conducted through casting, and the thick-large-section casting used for the wind power generation equipment is produced and obtained. According to the short-process manufacture method, the short-process process is adopted, so that the production efficiency is improved. A cupola furnace is replaced by the medium-frequency induction electric furnace, so that impurities in the molten iron and the temperature in the molten iron are precisely controlled, and the functions of environmental protection, energy saving and consumption reducing are further achieved. A cored wire is used for all dephosphorization, desulfuration and spheroidization, so that the treatment is fast in effect and high in efficiency, and the amount of graphite nodules are effectively increased, and accordingly the high-quality thick-large-section casting used for the wind power generation equipment is obtained.

Description

technical field [0001] The technical scheme of the invention relates to the manufacture of cast iron alloys, in particular to a short-flow production method for preparing castings of wind power generation equipment. Background technique [0002] Most of the important components of wind power generation equipment are castings. For example, the hub of the blades in the wind power generation device, the gear box and the mechanical stand are all castings. Because wind power generation equipment is often installed on high-altitude inland or ocean, the temperature is low, the working environment is relatively harsh, and the wind power generation equipment is huge, especially the components such as the gear box and the hub are installed at a high position, so hoisting and Maintenance is not easy to carry out, which requires these castings to be able to run stably and reliably for more than 20 years. In addition, most of the castings of wind turbines are the main bearing parts, so ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a short-flow production method for preparing wind power generation equipment castings. Due to the short-flow process, the molten iron from the blast furnace is poured into pig iron ingots without cooling. After dephosphorization and desulfurization It is directly injected into the medium frequency induction furnace, and the composition is adjusted in the medium frequency induction furnace, and then cast into shape through spheroidization inoculation, thus overcoming the instability of metallurgical quality in the production of thick and large cross-section castings for wind power equipment in the prior art. The inoculation effect is not good, the spheroidization incubation process is complex and difficult to control, the spheroidization recession phenomenon is prone to occur in the incubation process, the number of graphite spheroids cannot be effectively increased, and many shortcomings that cause environmental pollution