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Process for extrusion casting piston blank of internal combustion engine with local feinforcing of metal base composite material

A composite material, local enhancement technology, applied in the direction of piston, rotor, cylinder, etc., can solve the problems of poor slag discharge in the cavity, unfavorable human body mucous membrane and environmental protection, achieve low cost, improve thermal load resistance, and eliminate environmental pollution. Effect

Inactive Publication Date: 2004-04-14
张强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the squeeze casting method, the slag removal performance of the cavity is very poor, and it is easy to produce inclusions and waste products, and various chlorine-containing degassing and slag removal agents will produce strong pungent odors during the degassing process, which is harmful to human mucous membranes. bad for the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The process of squeeze-casting the metal matrix composite material to locally reinforce the piston blank of the internal combustion engine in this embodiment adopts the following steps:

[0065] (1) Making reinforced phase pre-components

[0066] The preparation method of metal matrix composite material reinforced phase pre-component, the preparation method of metal matrix composite material locally reinforced product pre-component, the preparation method of short fiber reinforced metal matrix composite material product porous preform to make reinforced phase pre-component, metal matrix composite material reinforced The preparation method of the phase pre-component has been recorded in the Chinese patent application number 03134444.5, the preparation method of the metal matrix composite material locally reinforced product pre-component has been recorded in the Chinese patent application number 03134445.3, and the short fiber reinforced metal matrix composite The prepara...

Embodiment 2

[0099] In the present embodiment (2) in the process step of preparing the matrix alloy charge, the matrix alloy charge is prepared according to the following weight ratio:

[0100] Silicon 11%

[0101] Copper 0.5%

[0102] Magnesium 0.4%

[0103] Manganese 0.2%

[0104] Vanadium 0.05%

[0105] Aluminum added to 100%

[0106] In (5) the modification process step, in the alloy melt, add the following ternary composite modification agent (based on the addition of a single element) that is crushed to 5-10mm particles by weight percentage of the matrix alloy charge:

[0107] Be 0.013%

[0108] Ti 0.04%

[0109] Te 0.002%

[0110] Other processing steps are identical with embodiment 1.

Embodiment 3

[0112] In the present embodiment (2) in the process step of preparing the matrix alloy charge, the matrix alloy charge is prepared according to the following weight ratio:

[0113] Silicon 13%

[0114] Copper 2.0%

[0115] Magnesium 1.4%

[0116] Manganese 0.9%

[0117] Vanadium 0.27%

[0118] Aluminum added to 100%

[0119] In (5) the modification process step, in the alloy melt, add the following ternary composite modification agent (based on the addition of a single element) that is crushed to 5-10mm particles by weight percentage of the matrix alloy charge:

[0120] Be 0.016%

[0121] Ti 0.06%

[0122] Te 0.004%

[0123] Other processing steps are identical with embodiment 1.

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PUM

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Abstract

The invention is a craft which founds metal base compound local enhanced engine piston blank. It includes: (1) produces enhancing phase pre-component; (2) confects base alloy materials, the proportion is: silicon 11~13%, copper 0.5~2.0%, magnesium 0.4~1.4%, manganese 0.2~0.9%, vanadium 0.05~0.27%, the other is aluminum; (3) melts the base alloy; (4) refines it by eliminating the air: flows argon with pressure of 100~110mm mercury column for about 6~8 minutes, the temperature is 780~810íÒC; (5) Deterioration processing: adds in 0.013~0.016% Be, 0.04~0.06% Ti, 0.002~0.004% Te ternary compound deterioration agent; (6) prepares the mould; (7) founds the piston blank.

Description

technical field [0001] The invention belongs to the technical field of mechanical parts manufacturing technology, and in particular relates to a technology for locally reinforcing piston blanks of internal combustion engines by extrusion casting metal matrix composite materials. Background technique [0002] It is increasingly recognized as an effective and feasible way to use metal matrix composites to locally strengthen the first ring groove of internal combustion engine pistons and diesel engine piston combustion chambers to meet the increasing technical requirements of modern high-parameter internal combustion engines for piston parts. Japan, the United States, Germany and other countries have already supplied practical products to the market, and the use effect is good. It is firstly used as a powerful upgrade product for the traditional piston with high-Ni austenitic cast iron ring structure applied to light-duty high-speed diesel engines and heavy-duty reinforced diese...

Claims

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Application Information

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IPC IPC(8): B22D17/00B22D19/00C22C21/00
Inventor 张强窦柱张尚荣
Owner 张强
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