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Production method for producing wind power hub from full waste steel

A production method, the technology of all scrap steel, is applied in the direction of wind power generation, wind turbines consistent with the wind direction, wind turbines, etc., to achieve the effects of reducing costs, reaching the standard of section shrinkage, and reducing production costs

Active Publication Date: 2022-05-10
ZHANGJIAGANG CITY GUANGDA MACHINERY FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the main problem encountered in the production of 3.35MW wheel hubs from all scrap steel is: residual elements such as Mn, Cr, Ni, Mo, etc. in scrap steel raw materials, among which residual elements such as Ni, Mo, etc. can be obtained through the control of scrap steel materials, so how to remove excess Mn and Cr are the key to whether the product performance indicators (yield, tensile strength, elongation, reduction of area and impact resistance) are qualified

Method used

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  • Production method for producing wind power hub from full waste steel
  • Production method for producing wind power hub from full waste steel
  • Production method for producing wind power hub from full waste steel

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Experimental program
Comparison scheme
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Embodiment 1

[0033] The present invention provides a technical solution: a production method for producing wind power hubs from scrap steel, comprising the following steps:

[0034] Scrap steel screening and cleaning, each element in the scrap steel meets the requirements in the table below:

[0035]

[0036] Pre-alloying treatment, use induction furnace to melt scrap steel and do pre-alloying treatment, use layer by layer method for carburization, end carbon content 3.8%, silicon content ≤ 0.60%, induction furnace tapping temperature 1470 ℃;

[0037] Temperature measurement, the molten iron is transferred to VOD for temperature measurement, argon gas is turned on, and the pressure of argon gas is 0.57MPa;

[0038] Temperature regulation, adjust the temperature of molten iron, the target temperature is ≤1320℃;

[0039] Add slag, the amount of slag is 3%, the ratio of slag: lime: 13%, fluorite: 4%, iron oxide scale: 45%, quartz sand: 44%;

[0040] Vacuum treatment, buckle the cover, va...

Embodiment 2

[0051] The present invention provides a technical solution: a production method for producing wind power hubs from scrap steel, comprising the following steps:

[0052] Scrap steel screening and cleaning, each element in the scrap steel meets the requirements in the table below:

[0053]

[0054] Pre-alloying treatment, use induction furnace to melt scrap steel and do pre-alloying treatment, use layer by layer stacking method when increasing carbon, end point carbon content 3.5%, silicon content ≤ 0.60%, induction furnace tapping temperature 1350 ℃;

[0055] Temperature measurement, transfer the molten iron to VOD temperature measurement, turn on the argon gas, the pressure of argon gas is 0.4~0.6MPa;

[0056] Temperature regulation, adjust the temperature of molten iron, the target temperature is ≤1320℃;

[0057]Add slag, slag amount 2%, slag ratio: lime: 15%, fluorite: 3%, iron oxide scale: 48%, quartz sand: 40%;

[0058] Vacuum treatment, buckle the cover, vacuumize, t...

Embodiment 3

[0069] The present invention provides a technical solution: a production method for producing wind power hubs from scrap steel, comprising the following steps:

[0070] Scrap steel screening and cleaning, each element in the scrap steel meets the requirements in the table below:

[0071]

[0072]

[0073] Pre-alloying treatment, use induction furnace to melt scrap steel and perform pre-alloying treatment, and use layer by layer stacking method for carburization, end point carbon content 4.0%, silicon content ≤ 0.60%, induction furnace tapping temperature 1450 ℃;

[0074] Temperature measurement, transfer the molten iron to VOD temperature measurement, turn on argon, argon pressure 0.6MPa;

[0075] Temperature regulation, adjust the temperature of molten iron, the target temperature is ≤1320℃;

[0076] Add slag, the amount of slag is 3.5%, the ratio of slag: lime: 15%, fluorite: 3%, iron oxide scale: 48%, quartz sand: 40%;

[0077] Vacuum treatment, buckle the cover, va...

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Abstract

The invention provides a production method for producing a wind power hub through full waste steel. The production method comprises the following steps of waste steel screening and cleaning, pre-alloying treatment, temperature measuring, temperature adjusting, slag adding, vacuum treatment, oxygen blowing, stirring, slag pouring, alloying treatment, molten iron pouring, cooling polishing treatment, detecting and workpiece forming. The technology has the beneficial effects that the technology for producing the wind power hub casting from the full waste steel is developed, and the VOD is used for demanganizing and dechroming to manufacture the nodular cast iron from the full waste steel. And low-grade cast pig iron with high Mn and Cr content can be refined into high-grade cast pig iron, so that the production cost is greatly reduced, and resources are saved.

Description

technical field [0001] The invention relates to the technical field of cast iron, in particular to a production method for producing wind power hubs from all scrap steel. Background technique [0002] As a material with reliable performance, cast iron is widely used in various casting products. With the severe pressure of global commodity price fluctuations, various casting companies are looking for more efficient, environmentally friendly and more economical methods. Among them, increasing the proportion of steel scrap usage has become one of the most direct and efficient ways. Increasing the proportion of steel scrap used will inevitably lead to the problem that the content of Mn and Cr in the molten iron exceeds the standard, which will eventually affect the use effect. [0003] At present, most wind power hubs use ductile iron as raw material. Compared with other types of cast iron, nodular cast iron has high purity of molten iron, which requires extremely high require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/08C21C1/10C22C37/04C22C37/08F03D1/06
CPCC22C33/08C21C1/10C22C37/04C22C37/08F03D1/0691F05B2280/1011Y02E10/72
Inventor 袁明于广文王光玮顾金才濮文超董俊
Owner ZHANGJIAGANG CITY GUANGDA MACHINERY FORGING