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Method for spheroidizing inoculation treatment of large-scale wind power casting

A technology of spheroidizing inoculation and wind power, which is applied in the field of spheroidizing inoculation of large-scale wind power castings to achieve the effects of saving production costs, improving inoculation effect and efficiency, and reducing operation steps

Pending Publication Date: 2022-07-29
武汉武重铸锻有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no one-time inoculation method in the process of manufacturing castings for wind power to achieve the purpose. Therefore, research on the method of one-time inoculation in the casting process of wind power castings is helpful for reducing operating steps and avoiding spheroidization and inoculation decline during the transfer of molten iron. problems, saving production costs is of great significance

Method used

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  • Method for spheroidizing inoculation treatment of large-scale wind power casting
  • Method for spheroidizing inoculation treatment of large-scale wind power casting
  • Method for spheroidizing inoculation treatment of large-scale wind power casting

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The method for spheroidizing inoculation treatment of castings for wind power in this embodiment includes the following steps:

[0028] S1. Charge selection: use 70wt% Q10 pig iron and 30wt% special scrap steel as raw materials, then add 1wt% recarburizer and 0.54wt% 75 ferrosilicon;

[0029] S2, the charge in step S1 is placed in a smelting furnace for smelting, and the molten iron temperature is controlled to be 1500±20°C;

[0030] S3, spheroidizing inoculation treatment: set a spheroidizing embedding chamber on the bottom side of the ladle, first place 1.4wt% spheroidizing agent and 0.006wt% antimony alloy in the spheroidizing process. At the bottom of the embedding chamber, add the inoculant slow-release ball A, and cover the silicon steel sheet; a circle of first bosses is arranged on the inner side wall of the middle part of the ladle, and a number of first bosses are placed on the first bosses. Inoculant sustained-release ball B; a circle of second bosses is arr...

Embodiment 2

[0036] The method for spheroidizing inoculation treatment of castings for wind power in this embodiment includes the following steps:

[0037] S1. Charge selection: use 60wt% Q10 pig iron and 40wt% scrap steel as raw materials, then add 1.45wt% recarburizer and 0.48wt% 75 ferrosilicon; the components of the Q10 pig iron, scrap steel, recarburizer, and 75 ferrosilicon are the same as The same in embodiment 1;

[0038] S2, the charge in step S1 is placed in a smelting furnace for smelting, and the molten iron temperature is controlled to be 1500±20°C;

[0039] S3, spheroidizing inoculation treatment: a spheroidizing embedding chamber is set on the bottom side of the ladle, firstly adding 0.6wt% of the first spheroidizer, 0.6wt% of the second spheroidizer, 0.6wt% of the molten iron in step S2, 0.002wt% antimony alloy was placed at the bottom of the spheroidized embedding chamber, then inoculant slow-release ball A was added, and a silicon steel sheet was covered; 10 first protru...

Embodiment 3

[0042] The method for spheroidizing inoculation treatment of castings for wind power in this embodiment includes the following steps:

[0043] S1. Charge selection: use 80wt% Q10 pig iron and 20wt% scrap steel as raw materials, then add 0.59wt% recarburizer and 0.45wt% 75 ferrosilicon; the components of the Q10 pig iron, scrap steel, recarburizer, and 75 ferrosilicon are The same in embodiment 1;

[0044] S2, the charge in step S1 is placed in a smelting furnace for smelting, and the molten iron temperature is controlled to be 1500±20°C;

[0045] S3, spheroidizing inoculation treatment: set a spheroidizing embedment chamber on the bottom side of the ladle, first add 0.75wt% of the first spheroidizer, 0.75wt% of the second spheroidizer and 0.75wt% of the molten iron in step S2. 0.008wt% antimony alloy is placed at the bottom of the spheroidized embedding chamber, and then an inoculant slow-release ball A is added to cover the silicon steel sheet; a first boss is arranged on th...

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Abstract

The invention provides a spheroidizing inoculation treatment method for a large-scale wind power casting, and belongs to the technical field of smelting of spheroidal graphite cast iron. The method comprises the following four steps: S1, furnace charge selection; s2, smelting furnace charge, and controlling the tapping temperature of molten iron to be 1480-1520 DEG C; s3, spheroidizing inoculation treatment is conducted; s4, pouring is conducted, and the pouring temperature ranges from 1330 DEG C to 1350 DEG C; wherein in the step S3, an inoculant is embedded in hollow spheres made of silicon steel sheets with different structures and through holes to obtain inoculant slow-release balls, then the inoculant slow-release balls are placed at different positions in a casting ladle, and after molten iron is poured into the casting ladle, the inoculant in the slow-release balls is gradually slowly released as time goes on to perform inoculation reaction; and meanwhile, the added antimony alloy improves the roundness of the graphite nodules, which is the uniqueness of the process. According to the method, the number, roundness and spheroidization grade of the graphite nodules can be improved without repeated inoculation, so that the strength and impact absorbing energy of the casting are improved, and finally the mechanical property of the wind power casting is improved.

Description

technical field [0001] The invention belongs to the technical field of smelting of ductile iron, and in particular relates to a method for spheroidizing inoculation treatment of large-scale wind power castings. Background technique [0002] Ductile iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. Due to its excellent performance, it has been successfully used to cast some complex forces, strength, toughness, wear resistance Demanding parts, and become the cast iron material second only to gray cast iron applications. At present, the fields involved in ductile iron include wind power generation, nuclear industry, auto parts and other manufacturing fields. [0003] Because wind turbines are mostly built in windy areas such as seaside and desert, the climatic conditions in these places are very harsh, and the units usually have to serve in the environment of -20 ℃ or even -40 ℃, and the service time is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/10B22D1/00C22C37/04C22C37/10C22C33/08
CPCC21C1/10C21C1/105B22D1/00C22C37/04C22C37/10C22C33/08Y02P10/20
Inventor 杨宗明王世良潘密杨华金万国蔡波
Owner 武汉武重铸锻有限公司
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