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Preparing method for an inoculant for cam shaft and application of nucleating agent

A technology of camshaft and inoculant, applied in the field of inoculant, can solve the problems of decreasing the hardness of the camshaft and not being able to improve the comprehensive performance of the camshaft at the same time, so as to prevent the segregation of phosphorus and the like, improve the machinability and service performance, and achieve a uniform white mouth. depth effect

Inactive Publication Date: 2016-03-02
成都宏源铸造材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when adding the above materials, new problems will be introduced, and the overall performance of the camshaft cannot be improved at the same time
For example, although adding chromium can be beneficial to the formation of camshaft white structure, it will cause cementite in the center of the camshaft, which will lead to a decrease in the hardness of the camshaft.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 (preparation inoculant)

[0019] 60% Si, 1.0% Al, 0.5% Ca, 1.0% Ba, 5% Cr, 0.05% V, 8% Nd, 1% Mn and 23.45% Fe mixed uniformly by weight Then put it into a vacuum electric furnace, replace the air in the furnace with argon, heat up and melt for 5 minutes, stir continuously during the melting process to make the raw materials mix evenly, cool in vacuum to form a block, and crush the block into an alloy with an average particle size of 50 μm Powder; the obtained above-mentioned alloy powder and the average particle diameter of 50 μm in weight percent are 1.5% Fe 3 o 4 Add the powder into the mixing container and mix it with alloy powder and Fe 3 o 4 The sodium silicate solution with 5% of the total weight of the powder is added together into a roller compacting device to form agglomerates, and finally crushed to an average particle size of 200 μm.

Embodiment 2

[0020] Embodiment 2 (preparation inoculant)

[0021] By weight percentage, 75% Si, 0.01% Al, 0.05% Ca, 0.1% Ba, 3% Cr, 0.03% V, 5% Nd and 16.81% Fe are mixed evenly and placed in a vacuum electric furnace In the process, replace the air in the furnace with argon, heat up and smelt for 10 minutes, stir continuously during the melting process, so that the raw materials are mixed evenly, cool in vacuum to form a block, and crush the block into an alloy powder with an average particle size of 100 μm; the obtained The above alloy powder and 0.5% Fe by weight with an average particle size of 100 μm 3 o 4 Add the powder into the mixing container and mix it with alloy powder and Fe 3 o 4 The sodium silicate solution of 3% of the total weight of the powder is added together into a roller compacting device to form agglomerates, and finally crushed to an average particle size of 500 μm.

Embodiment 3

[0022] Embodiment 3 (preparation inoculant)

[0023] 65% Si, 0.05% Al, 0.3% Ca, 0.5% Ba, 4.5% Cr, 0.05% V, 7.5% Nd, 1% Mn and 21.1% Fe mixed uniformly by weight Then put it into a vacuum electric furnace, replace the air in the furnace with argon, heat up and smelt for 6 minutes, stir continuously during the melting process to make the raw materials mix evenly, cool in vacuum to form a block, and crush the block into an alloy with an average particle size of 80 μm Powder; the obtained above-mentioned alloy powder and the average particle diameter of 80 μm in weight percent are 1% Fe 3 o 4 Add the powder into the mixing container and mix it with alloy powder and Fe 3 o 4 The sodium silicate solution of 3% of the total weight of the powder is added together into a roller compacting device to form agglomerates, and finally crushed to an average particle size of 300 μm.

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PUM

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Abstract

The invention discloses a preparing method for an inoculant for a cam shaft. The preparing method includes the following steps that 60-75% of Si, 0.01-1.0% of Al, 0.05-0.5% of Ca, 0.1-1.0% of Ba, 3-5% of Cr, 0.03-0.05% of V, 5-8% of Nd, 0-1% of Mn and the balance Fe which are evenly mixed are smelted, stirred, cooled and crushed; then Fe3O4 powder is mixed; and the mixture is pressed into a cluster and then crushed. The invention further discloses specific application of the inoculant for the cam shaft. By means of the inoculant for the cam shaft, the comprehensive performance of the cam shaft can be improved, and the inoculating efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of inoculants, and in particular relates to a method for preparing an inoculant specially used for camshafts, and the application of the inoculant in preparing camshafts. Background technique [0002] The inoculant is an additive that can promote the formation of graphite, reduce the tendency of whitening, improve the morphology and distribution of graphite, increase the number of eutectic groups, and refine the matrix structure. Currently the most widely used 75 ferrosilicon inoculant. [0003] Chilled ductile iron camshaft is one of the key components of automobile engine. With the development of the automobile industry, the engine power is getting higher and higher, and the performance requirements of the camshaft are also getting higher and higher. Due to the high contact stress and fast relative sliding speed between the cam surface and the tappet, and the high temperature generated during the mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/08C21C1/10B22D1/00
CPCC21C1/08B22D1/00C21C1/105
Inventor 韩岗马银强林志国
Owner 成都宏源铸造材料有限公司
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