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Phosphorus composite alterant for high-silicon hypereutectic aluminum piston

A composite modifier and hypereutectic technology, applied in the field of metal materials, can solve the problems of weak eutectic structure refinement, environmental impact, and no refinement, and achieve the effect of reducing sensitivity, reducing environmental protection pressure, and improving quality

Inactive Publication Date: 2021-11-09
安徽铜鼎轻金属新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are two kinds of phosphorus complexing agents commonly used in high-silicon supercrystalline aluminum pistons on the market today, one is aluminum-phosphorus alloy modifier, and the other is red phosphorus modifier. The structure is changed to a hypereutectic structure. The disadvantage is that only the primary silicon is refined, and the refinement of the eutectic structure is very weak. At the same time, it has no effect on the refinement of the chlorine solid solution dendrites. The red phosphorus reconditioning agent also has no such effect. Moreover, a large amount of white smoke is produced, which has a great impact on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of the phosphorus compound modifier of high silicon hypereutectic aluminum piston is as follows:

[0021] Step 1: Heat the graphite crucible to dark red and add Al until it melts;

[0022] Step 2: Add K when the temperature of the molten aluminum is raised to 754-770°C 2 TiF 6 Stir evenly with Al-Si alloy intermediate and cool down to 460-570°C;

[0023] Step 3: Add (NaPO 3 ) 6 and Al-B powder, stirred evenly with a stirring rod, then passed into gaseous S for 3-5 minutes for refining and sintering, and kept at constant temperature for 15-20 minutes;

[0024] Step 4: remove surface scum, and cast the prepared molten metal to obtain a phosphorus composite modifier for high-silicon hypereutectic aluminum pistons.

[0025] The fineness of Al-B powder is 180 mesh. The speed of stirring in step 2 is 1200r / s, and the appliance used for stirring is a graphite carbon rod. In step 3, the refining and sintering temperature is 630-720° C., and the sin...

Embodiment 1

[0027] The preparation method of the phosphorus compound modifier of high silicon hypereutectic aluminum piston is as follows:

[0028] Step 1: Heat the graphite crucible to dark red and add Al until it melts;

[0029] Step 2: Add K when the temperature of the molten aluminum is raised to 754-770°C 2 TiF 6 8% and Al-Si3% alloy intermediates are stirred evenly and cooled to 460-570°C;

[0030] Step 3: Add (NaPO 3 ) 6 10% and 3% Al-B powder, stir evenly with a stirring rod, then feed gaseous S0.1%, 3-5min for refining and sintering, refining and sintering temperature is 630-720°C, sintering time is 15-20min, keep at constant temperature 15~20min;

[0031] Step 4: remove surface scum, and cast the prepared molten metal to obtain a phosphorus composite modifier for high-silicon hypereutectic aluminum pistons.

Embodiment 2

[0033] The preparation method of the phosphorus compound modifier of high silicon hypereutectic aluminum piston is as follows:

[0034] Step 1: Heat the graphite crucible to dark red and add Al until it melts;

[0035] Step 2: Add K when the temperature of the molten aluminum is raised to 754-770°C 2 TiF 6 9% and Al-Si4% alloy intermediates are stirred evenly and cooled to 460-570°C;

[0036] Step 3: Add (NaPO 3 ) 6 12% and 4% Al-B powder, stir evenly with a stirring rod, then feed gaseous S0.2%, 3-5min for refining and sintering, refining and sintering temperature is 630-720°C, sintering time is 15-20min, keep at constant temperature 15~20min;

[0037] Step 4: remove surface scum, and cast the prepared molten metal to obtain a phosphorus composite modifier for high-silicon hypereutectic aluminum pistons.

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Abstract

The invention discloses a phosphorus composite alterant for a high-silicon hypereutectic aluminum piston and belongs to the technical field of metal materials. The phosphorus composite alterant comprises the following components in percentage by mass: 10-20% of (NaPO3)6, 0.1-0.5% of S, 3-8% of B, 8-13% of K2TiF6 and the balance of Al. The phosphorus composite alterant is added with potassium fluotitanate, so that the refining of a piston substrate can be improved; and furthermore, the operation can be stabilized, the sensitivity of a writhing reaction can be reduced, the generation of smoke can be reduced, the environmental protection pressure of an enterprise can be reduced, and the product excellence rate can be improved, and then the benefits of the enterprise can be improved.

Description

technical field [0001] The invention relates to a phosphorus composite modifier, in particular to a phosphorus composite modifier for a high-silicon hypereutectic aluminum piston, and belongs to the technical field of metal materials. Background technique [0002] There are two kinds of phosphorus complexing agents commonly used in high-silicon supercrystalline aluminum pistons on the market today, one is aluminum-phosphorus alloy modifier, and the other is red phosphorus modifier. The structure is changed to a hypereutectic structure. The disadvantage is that only the primary silicon is refined, and the refinement of the eutectic structure is very weak. At the same time, it has no effect on the refinement of the chlorine solid solution dendrites. The red phosphorus reconditioning agent also has no such effect. Moreover, a large amount of white smoke is produced, which has a great impact on the environment. Contents of the invention [0003] The main purpose of the presen...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/02C22C21/00
CPCC22C1/06C22C1/026C22C21/00
Inventor 董圣林董辉李传孝董宇航刘德成
Owner 安徽铜鼎轻金属新材料科技有限公司