Forging process for wind generator spindle

A wind power generator and process technology, applied in the direction of engine components, mechanical equipment, etc., can solve the problems of simple and rough heat treatment process, unstable product quality, etc., achieve high fatigue resistance, protect non-renewable resources, and protect the environment.

Active Publication Date: 2012-11-07
JIANGSU JINYUAN FORGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large allowable range of material composition and physical and chemical indicators of traditional spindle forgings, the forging and heat treatment process is simple and rough, resulting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Casting:

[0027] Refining to obtain alloy steel molten steel with the following components;

[0028] Carbon 0.35%, silicon 0.27%, manganese 0.85%, phosphorus 0.008%, sulfur 0.008%, chromium 1.12%, molybdenum 0.26%, nickel 0.39%, copper 0.12%, aluminum 0.032%, niobium 0.056%; tungsten 0.005%, arsenic 0.005% %, tin 0.006%; the rest is iron.

[0029] The casting adopts the bottom casting method, and 2 to 4 ingots can be poured each time. The molten steel is poured from the ladle to the central casting pipe; The length of the mouth is 1600mm-1800m, the thickness is 750mm-950mm, the height is 2100mm-2500mm; the unit weight is 13T-33T.

[0030] 2. Heating

[0031] For the first heating, put the selected billet into a chamber-type natural gas heating furnace for heating, the heating temperature is 1200°C, and keep it in the temperature range of 1200°C for 5 hours, in which the billet is heated from ignition to 1200°C, and the heating rate is 120℃ / h;

[0032] 3. Forgin...

Embodiment 2

[0042] 1. Casting:

[0043] Refining to obtain alloy steel molten steel with the following components;

[0044] Carbon 0.36%, silicon 0.30%, manganese 0.92%, phosphorus 0.006%, sulfur 0.006%, chromium 1.12%, molybdenum 0.26%, nickel 0.39%, copper 0.12%, aluminum 0.032%, niobium 0.056%; tungsten 0.005%, arsenic 0.005% %, tin 0.006%; the rest is iron.

[0045] The casting adopts the bottom casting method, and 2 to 4 ingots can be poured each time. The molten steel is poured from the ladle to the central casting pipe; The length of the mouth is 1600mm-1800m, the thickness is 750mm-950mm, the height is 2100mm-2500mm; the unit weight is 13T-33T.

[0046] 2. Heating

[0047] For the first heating, put the selected billet into a chamber-type natural gas heating furnace for heating, the heating temperature is 1200°C, and keep it in the temperature range of 1200°C for 5 hours, wherein the billet is heated from ignition to 1200°C. 120℃ / h;

[0048] 3. Forging

[0049] According to ...

Embodiment 3

[0068] 1. Casting

[0069] Refining alloy steel molten steel with the above components and casting it into billets;

[0070] 2. Heating

[0071] For the first heating, put the selected billet into a chamber-type natural gas heating furnace for heating, the heating temperature is 1250°C, and keep it in the temperature range of 1250°C for 5 hours, in which the billet is heated from ignition to 1250°C, the heating rate is 150℃ / h;

[0072] 3. Forging

[0073] Depending on the size of the forging, perform operations such as upsetting or elongating, flattening, and reaming on a 4500T or 2000T hydraulic press. The initial forging temperature is 1250°C to 1280°C, the forging ratio is greater than 4 to 6 times, and the final forging temperature is 860°C to 880°C. , The actual grain size of the steel is about 8 grades, the blank reaches the specified geometric shape, and the machining allowance is about 10mm.

[0074] 4. Heating

[0075] For the second heating, the forged steel bil...

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PUM

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Abstract

The invention discloses a forging process for a wind generator spindle. The forging process includes the steps: firstly, casting molten alloy steel to a central cast tube to obtain a steel billet; secondly, heating the steel billet for the first time; thirdly, forging by upsetting or drawing out the heated steel billet by a hydraulic press; fourthly, heating the steel billet for the second time; fifthly, forming the spindle by forging; sixthly, cooling the spindle; and seventhly, performing heat treatment. By the aid of excellent alloy ratio and exquisite forging procedures, the wind generator spindle with high ductility, low temperature resistance and high strength is obtained and can safely and stably bears load under the condition of high wind energy and large temperature difference.

Description

technical field [0001] The invention relates to a forging process of a main shaft of a wind power generator. Background technique [0002] In today's society, with the increasingly serious problems of global energy shortage and environmental pollution, the search for renewable energy has become a major issue faced by countries all over the world. Compared with other energy sources, natural wind energy not only has a large amount of reserves, is widely distributed, and will never be exhausted, but also has the advantages of fast start-up, short construction period, less basic investment than hydropower station construction, strong flexibility, and can effectively curb the greenhouse effect and Sandstorm disasters, green environmental protection and other characteristics. Therefore, the use of wind power generation as a new energy development has become an important part of the global future energy development strategy and has received great attention and strong support from ...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21K1/06C22C38/48
Inventor 葛艳明杨志华黄俊李周
Owner JIANGSU JINYUAN FORGE
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