QT500-14 material wind power base casting forming method

Abstract

The invention provides a QT500-14 material wind power base casting forming method, belongs to the technical field of casting, and mainly aims at solving the problems that a QT500-14 brand wind power base casting is prone to generating the defects of shrinkage porosity, shrinkage cavity, slag inclusion and the like and the material performance is unqualified; the QT500-14 brand base casting forming method is designed from the aspects of casting parting surface selection, casting system design, chilling block arrangement, reduced scale control, smelting component parameters and the like, a QT500-14 base with controllable internal quality and qualified mechanical properties can be stably produced through the QT500-14 brand base casting forming method, so that the QT500-14 base made of the material has relatively high strength and elongation; and under the condition of the same power and load, the wall thickness and the weight of the base made of the material can be reduced, and the purpose of reducing the cost of a wind turbine generator is achieved.

Description

technical field [0001] The invention belongs to the field of casting technology, and in particular relates to a casting method for a wind power base made of QT500-14 material. Background technique [0002] The base, also known as the main frame, is a key component for connecting the tower and the hub of a large-scale wind turbine. It is equipped with hubs, main shafts, bearing housings, generators and other main accessories, and is the most critical and most complex bearing in the wind turbine. One of the parts, generally produced by welding or casting. Compared with the welding base with high cost and poor structure, the casting base has become the mainstream choice of large wind turbines. The casting material is generally ordinary QT350-22AL or QT400-18AL. For details, see the national standard "Wind Turbine Generating Set Ductile Iron Castings" "GB / T25390. [0003] Ordinary QT350-22AL or QT400-18AL material base has a high carbon content, and the feeding ability of grap...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a casting method for wind power base of QT500-14 material. The present invention mainly aims at the problem that the casting of wind power base of QT500-14 brand is prone to defects such as shrinkage porosity, shrinkage cavity, slag inclusion and unqualified material performance. , from the selection of casting parting surface, pouring system design, cold iron layout, scale control, melting composition parameters, etc., a casting molding method of QT500-14 brand base is designed, which can stably produce internal quality controllable , The QT500-14 base with qualified mechanical properties makes the base of this material grade relatively high in strength and elongation. Under the same power and load conditions, the base of this material can reduce the wall thickness and weight, so as to reduce the wind turbine. purpose of cost

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