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Smelting additive specially used for cast balls and wear-resistant cast iron

A wear-resistant cast iron and additive technology is applied in the fields of metal super-strength agents, smelting additives, casting balls and special smelting additives for wear-resistant cast iron, and can solve the problems of inability to meet the production process requirements of cast ball smelting, increasing costs, and wasting resources. Achieve the effect of reducing heat treatment process, prolonging service life and saving resources

Inactive Publication Date: 2012-10-17
CHAOYANG HONGDA MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: first, adding a large amount of alloy elements wastes resources and high cost; second, the existing cast balls must be heat treated after casting, which consumes time and electricity and increases costs
[0006] The additives used in the casting ball smelting given by the above technical scheme can improve the comprehensive performance of cast iron to a certain extent, but there are also problems that cannot meet the continuously developing production process requirements of casting ball smelting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: The weight % content of each component of the metal superstrong agent is: titanium=15%, vanadium=0.2%, boron=1%, carbon=2%, rare earth=0.5%, aluminum=81.3%.

[0022] When preparing, prepare the materials according to the above ratio of each component, first use aluminum as the carrier, put it into the vacuum furnace to melt; then add titanium and vanadium into the vacuum furnace in sequence; after melting, add boron in order , carbon, rare earth. After 5 minutes, the smelting process of the cast ball and the special smelting additive for wear-resistant cast iron ends.

[0023] Then pour the metal superstrong agent liquid into a centrifuge to make granules.

[0024] The method of use is: when casting balls, add metal super-strength agent particles according to 0.2% of the total weight of molten iron in the intermediate frequency furnace, and add them into the intermediate frequency furnace 5 minutes before the furnace is released.

[0025] See Table 1 for th...

Embodiment 2

[0026] Example 2: The weight % content of each component of the metal superstrong agent is: titanium=25%, vanadium=0.3%, boron=2%, carbon=3%, rare earth=0.8%, aluminum=68.9%.

[0027] When preparing, prepare the materials according to the above ratio of each component, first use aluminum as the carrier, put it into the vacuum furnace to melt; then add titanium and vanadium into the vacuum furnace in sequence; after melting, add boron in order , carbon, rare earth. After 5 minutes, the smelting process of the metal superstrong agent ends.

[0028] Then pour the metal superstrong agent liquid into a centrifuge to make granules.

[0029] The method of use is: when casting balls, add metal super-strength agent particles according to 0.4% of the total weight of molten iron in the intermediate frequency furnace, and add them into the intermediate frequency furnace 5 minutes before the furnace is released.

[0030] See Table 1 for the experimental results (properties) of cast ball ...

Embodiment 3

[0031] Example 3: The weight % content of each component of the metal superstrong agent is: titanium=35%, vanadium=0.5%, boron=2.5%, carbon=4%, rare earth=1%, aluminum=57%.

[0032] When preparing, prepare the materials according to the above ratio of each component, first use aluminum as the carrier, put it into the vacuum furnace to melt; then add titanium and vanadium into the vacuum furnace in sequence; after melting, add boron in order , carbon, rare earth. After 5 minutes, the smelting process of the metal superstrong agent ends.

[0033] Then pour the metal superstrong agent liquid into a centrifuge to make granules.

[0034] The method of use is: when casting balls, add metal super-strength agent particles according to 0.6% of the total weight of molten iron in the intermediate frequency furnace, and add them into the intermediate frequency furnace 5 minutes before the furnace is released.

[0035] See Table 1 for the experimental results (properties) of the manufact...

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Abstract

The invention provides a smelting additive specially used for cast balls and wear-resistant cast iron. The additive is characterized by comprising, by weight percent, 10 to 50% of titanium, no more than 0.5% of vanadium, no more than 4% of boron, no more than 5% of carbon and no more than 1% of rare earth, with the balance being aluminum. A preparation method for the additive comprises the following steps: according to above-mentioned proportions, fusing aluminum which is used as a carrier in a vacuum furnace at first; then respectively adding titanium and vanadium into the vacuum furnace in order; then successively adding boron, carbon and rare earth after titanium and vanadium are melted, and when smelting is finished after 5 min, metal liquid is poured into a centrifuge to prepare granules. After application of the additive provided in the invention, cast balls are enabled to have the characteristics of obviously improved comprehensive mechanical performance and a prolonged service life; resources are saved, cost for cast balls is reduced, more than 80% of ferrochrome is saved in production of each ton of cast balls, the procedure of heat treatment is omitted, and more than 300 degrees of power are saved in production of each ton of cast balls.

Description

technical field [0001] The invention relates to a smelting additive, in particular to a casting ball used to increase hardness, strength and toughness during smelting and a special smelting additive for wear-resistant cast iron (hereinafter referred to as metal superstrength agent), which belongs to the ferrous metal smelting technology field. Background technique [0002] At present, the existing cast ball smelting at home and abroad is mainly based on adding various alloying elements such as chromium, molybdenum, and copper. Its disadvantages are: firstly, adding a large amount of alloy elements wastes resources, and the cost is high; secondly, the existing casting balls must be heat treated after casting, which consumes time and electricity and increases the cost. [0003] The publication number is CN 1107186 Chinese invention patent application provides a kind of "high carbon equivalent high-strength gray cast iron stabilizing additive", which is based on natural titani...

Claims

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Application Information

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IPC IPC(8): C22C33/08C22C14/00C22C21/00C22C30/00C22C1/02
Inventor 朱春生
Owner CHAOYANG HONGDA MACHINERY
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