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Recasting aluminum alloy material of exhaust rocker arm

An aluminum alloy material and aluminum alloy technology, applied in the material field of the engine rocker arm, can solve the problems of low strength, hardness, and elongation, which cannot meet the requirements of the engine exhaust rocker arm, and the exhaust rocker arm breaks, so as to improve the comprehensive Effects of improving mechanical properties, improving appearance quality of finished products, and reducing scrap rate

Inactive Publication Date: 2015-02-04
NANYANG JUQUAN METAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the recast aluminum alloy material of the engine exhaust rocker arm used in China is generally not high in strength, hardness, and elongation, which cannot meet the requirements of the engine exhaust rocker arm, especially due to insufficient elongation, the exhaust rocker arm is broken. phenomenon often occurs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0063] The steps of the preparation method of the recast aluminum alloy material of the exhaust rocker arm are as follows:

[0064] 1) Add aluminum ingots by weight percentage in the melting furnace, heat to 580-600°C, melt the aluminum ingots until they can be stirred, add a low-temperature deslagging agent accounting for 0.1-0.15% of the total weight of the aluminum ingots, and stir the molten aluminum for 40-60 After the second time, add low-temperature slag remover accounting for 0.1-0.15% of the total weight of the aluminum ingot, and stir again until the scum is gray-black powder;

[0065] 2) Continue heating to a temperature of 710-750° C., and after removing scum on the surface of the molten aluminum, add each component in the aluminum alloy, except Al, into the melting furnace in sequence according to their respective weight percentages;

[0066] The order of adding the components is as follows: first add Si and Cu, and stir thoroughly for 3-5 minutes after Si and Cu ...

Embodiment 1

[0081] According to the 360Kg of the melting furnace full furnace:

[0082] Weigh each component according to the following formula:

[0083] Si: 30.96kg,

[0084] Mg: 1.62kg,

[0085] Cu: 5.94kg,

[0086] Aluminum-titanium-boron alloy AlTi5B: 5.76kg,

[0087] Aluminum strontium alloy AlSr10: 0.05kg,

[0088] Al: 315.67kg.

[0089] The steps of the preparation method of the recast aluminum alloy material of the exhaust rocker arm are as follows:

[0090] 1) Add aluminum ingots by weight percentage in the melting furnace, heat to 580-600°C, melt the aluminum ingots until they can be stirred, add a low-temperature deslagging agent accounting for 0.1-0.15% of the total weight of the aluminum ingots, and stir the molten aluminum for 40-60 After the second time, add low-temperature slag remover accounting for 0.1-0.15% of the total weight of the aluminum ingot, and stir again until the scum is gray-black powder;

[0091] 2) Continue heating to a temperature of 710-750° C., a...

Embodiment 2

[0101] According to the 360Kg of the melting furnace full furnace:

[0102] Weigh each component according to the following formula:

[0103] Si: 33.84kg,

[0104] Mg: 1.98kg,

[0105] Cu: 6.66kg,

[0106] Aluminum-titanium-boron alloy AlTi5B: 10.8kg,

[0107] Aluminum strontium alloy AlSr10: 0.10kg,

[0108] Al: 306.62kg.

[0109] The steps of the preparation method of the recast aluminum alloy material of the exhaust rocker arm are as follows:

[0110] 1) Add aluminum ingots by weight percentage in the melting furnace, heat to 580-600°C, melt the aluminum ingots until they can be stirred, add a low-temperature deslagging agent accounting for 0.1-0.15% of the total weight of the aluminum ingots, and stir the molten aluminum for 40-60 After the second time, add low-temperature slag remover accounting for 0.1-0.15% of the total weight of the aluminum ingot, and stir again until the scum is gray-black powder;

[0111] 2) Continue heating to a temperature of 710-750° C., a...

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Abstract

The invention discloses a recasting aluminum alloy material of an exhaust rocker arm. The aluminum alloy comprises the following chemical ingredients by weight percent in the aluminum alloy: 8.6-9.4% of Si, 0.45-0.55% of Mg, 1.65-1.85% of Cu, less than 0.10% of Mn, less than 0.20% of Fe, less than 0.05% of Zn, 0.08-0.13% of Ti, less than 0.002% of Ca, less than 0.005% of Na, 0.005-0.015% of Sr, less than 0.1% of Pb, less than 0.50% of total impurity, wherein each impurity accounts for less than 0.15%, and the balance of Al. The mechanical property of the heavy recasting aluminum alloy material of the exhaust rocker arm prepared by the invention is greatly improved; the normal-temperature tensile strength can achieve over 359MPa; the yield strength can achieve over 285MPa; the hardness achieves over 100HB; and the coefficient of elongation achieves over 3.0%.

Description

technical field [0001] The invention relates to a material for an engine rocker arm, in particular to a recast aluminum alloy material for an engine exhaust rocker arm. Background technique [0002] The exhaust rocker arm of the engine valve train acts as a double-arm lever, so that the valve movement direction is different from the push rod movement direction; and the valve lift is increased under a small cam lift. That is, under the action of the push rod or the cam, the rocker arm swings to overcome the resistance of the valve spring and open the valve. [0003] When the engine is working, the exhaust rocker arm is subjected to large pulsating loads and complex alternating stress. Due to the needs of working conditions, the exhaust rocker arm is required to have special characteristics: [0004] 1) The friction between the exhaust rocker arm and the valve, cam or push rod is always under constant impact load, and the working conditions are very harsh. Therefore, the work...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/06C22F1/043
Inventor 薛玉田
Owner NANYANG JUQUAN METAL IND CO LTD