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A kind of preparation method and application of inoculant for camshaft

A camshaft and inoculant technology, applied in the field of inoculants, can solve the problems of not being able to improve the comprehensive performance of the camshaft at the same time, decrease the hardness of the camshaft, etc., so as to improve the machinability and service performance, prevent the segregation of phosphorus and the like, and improve the strength of cast iron. Effect

Active Publication Date: 2017-06-06
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

[0023] Embodiment 1 (preparation inoculant)

[0024] 60% Si, 1.0% Al, 0.5% Ca, 1.0% Ba, 5.0% Cr, 0.05% V, 8% Nd, 1% Mn, 0.5% recarburizer by weight and 22.95% Fe are mixed evenly and put into a vacuum electric furnace, the air in the furnace is replaced with argon, the temperature is raised to 1300 ° C, and the melting is carried out for 5 minutes. During the melting process, the stirring is kept to make the raw materials evenly mixed; pouring in the container, and The container is placed in liquid nitrogen, and the alloy raw material is rapidly cooled to room temperature to form a block, and the block is crushed into an alloy powder with an average particle size of 50 μm; %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. Wherein, ...

Embodiment 2

[0025] Embodiment 2 (preparation inoculant)

[0026] 75% Si, 0.01% Al, 0.05% Ca, 0.1% Ba, 3.0% Cr, 0.03% V, 5% Nd, 1% carburant and 15.81% Fe by weight After mixing evenly, put it into a vacuum electric furnace, replace the air in the furnace with argon, raise the temperature to 1500°C, and melt for 10 minutes. Stir continuously during the melting process to mix the raw materials evenly; pour in a container, and place the container in liquid nitrogen In the process, the alloy raw material is rapidly cooled to room temperature to form a block, and the block is crushed into an alloy powder with an average particle size of 100 μm; the above-mentioned alloy powder obtained and an average particle size of 0.5% 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 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 partic...

Embodiment 3

[0027] Embodiment 3 (preparation inoculant)

[0028] 65% Si by weight, 0.05% Al, 0.3% Ca, 0.5% Ba, 4.5% Cr, 0.05% V, 7.5% Nd, 1% Mn, 0.6% carburizer and 20.5% Fe are mixed evenly and placed in a vacuum electric furnace, the air in the furnace is replaced with argon, the temperature is raised to 1400 ° C, and the melting is carried out for 6 minutes. During the melting process, the stirring is kept to make the raw materials evenly mixed; pouring in the container, and The container is placed in liquid nitrogen, and the alloy raw material is rapidly cooled to room temperature to form a block, and the block is crushed into an alloy powder with an average particle size of 80 μm; %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. Wherein, t...

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Abstract

The invention discloses a preparing method of a nucleating agent for a cam shaft. The preparing method comprises 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, 0.5-1% of carburant and the balance Fe which are evenly mixed are melted, stirred, poured, cooled rapidly and crushed and then are mixed with Fe3O4 powder to be pressed into pellets to be crushed. The invention further discloses specific application of the nucleating agent for the cam shaft. By means of the nucleating agent for the cam shaft, the comprehensive performance of the cam shaft can be improved, and the nucleating 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 preparing 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 t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C22C28/00
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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