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Smelting method for wind generating set casting

A technology for wind turbines and castings, which is applied in the field of metal smelting, can solve the problem of high maintenance and maintenance costs, and achieve the effects of reducing the number of maintenance and maintenance, improving the spheroidization rate and stable operation.

Inactive Publication Date: 2011-11-23
江苏兴盛重工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the repair and maintenance cost of wind turbine castings is extremely high, so the castings of wind turbines must adopt a special melting method to further improve the structure and performance of castings to ensure their working stability and prolong their service life

Method used

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  • Smelting method for wind generating set casting
  • Smelting method for wind generating set casting
  • Smelting method for wind generating set casting

Examples

Experimental program
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Embodiment 1）

[0021] The smelting method of the wind energy casting of the present embodiment has the following steps:

[0022] ① Ingredients. The raw materials used for melting into molten iron include: foundry pig iron, scrap steel and returned charge. The weight of foundry pig iron accounts for 40% to 60% of the total weight of raw materials, the weight of scrap steel accounts for 30% to 50% of the total weight of raw materials, and the weight of recycled materials accounts for 10% to 30% of the total weight of raw materials. The total weight of the above-mentioned raw materials refers to the sum of the weights of foundry pig iron, scrap steel and recycled materials.

[0023] The cast pig iron used is the cast pig iron produced by Benxi Xingsheng Casting Co., Ltd. The weight components of the cast pig iron are that the carbon content is greater than 4.0%, the silicon content is 0.8% to 1.6%, the manganese content is less than 0.15%, and the phosphorus content is less than 0.04%. Sulfur...

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Abstract

The invention relates to a smelting method for a wind generating set casting. The method comprises the steps of proportioning, smelting, nodulizing, primary inoculation, casting and secondary inoculation. The method specifically comprises the following steps of: smelting at the temperature of between 1,370 and 1,390 DEG C; heating molten iron to the temperature of between 1,410 and 1,430 DEG C, measuring carbon equivalent (CE) value, measuring spectrum, adding carburant and silicon iron, and adjusting the weight components of alloy to ensure that the content of carbon is 3.7 to 3.85 percent and the content of silicon is 1.3 to 1.5 percent; adding antimony alloy in an amount which is 0.003 to 0.005 percent of the total weight of the molten iron after raking out the slag; adding a nodulizing agent in an amount which is 0.9 to 1.2 percent of the total weight of the molten iron; adding primary inoculant in an amount which is 0.3 to 0.5 percent of the total weight of the molten iron; controlling the casting temperature of the molten iron at 1,300 to 1,340 DEG C; and performing secondary inoculation, namely stream inoculation, wherein the adding amount of the stream inoculant to 0.15 to0.25 percent of the total weight of the molten iron. By the method, the wind generating set casting has better mechanical property.

Description

technical field [0001] The invention relates to a metal smelting method, in particular to a smelting method for casting wind power generating set castings. Background technique [0002] Wind turbines generally mainly include wind turbines, gearboxes, generators, controllers and structural parts. Structural elements include underground foundations, towers and nacelles. The nacelle includes a base and a nacelle cover. For a horizontal-axis wind turbine with a capacity of megawatts, the base of the nacelle is generally composed of a rear frame fixed to a front frame. Wind turbines include blades, hubs, main shafts and fairings. The tower is fixed on the underground foundation, the base of the nacelle is fixed on the top of the tower by its front frame from above, the main shaft bearing seat and the gearbox are arranged on the front frame, and the main shaft bearing seat is fixed on the front frame from above The front end of the gear box is fixed in the middle of the front ...

Claims

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Application Information

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IPC IPC(8): C22C33/08B22D1/00
Inventor 何义雄沈火元
Owner 江苏兴盛重工有限公司
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