CN106148858A - A kind of high heat radiation car engine aluminum matrix composite - Google Patents

Abstract

The invention discloses a kind of high heat radiation car engine aluminum matrix composite, be made up of the raw material of following weight portion: aluminium 95 98, glass fibre 23, copper 0.3 0.5, nickel 0.1 0.2, zinc 1 1.2, zirconium 0.8 1, molybdenum 0.2 0.3, iron 1 1.4, cetyl trimethylammonium bromide 0.06 0.1, graphene oxide 35, zircoium hydride 58, carbon trichloride 0.86 1, active lime 1.1 1.5, potassium sulfide 0.2 0.4, polyvinylpyrrolidone 0.25 0.3, ferrous sulfate 0.3 0.4, nano aluminum nitride 1.1 1.6, impurity≤0.01, deionized water are appropriate；The aluminium of the present invention is high-strength, wear-resisting, thermal diffusivity is good, and shapes and do not have resilience, dimensionally stable, and this manufacturing process meets environmental protection processing, disclosure satisfy that the demand of car engine, and can be mass-produced.

Description

A kind of high heat radiation car engine aluminum matrix composite

Technical field

The present invention relates to technical field of automobile parts, particularly relate to a kind of high heat radiation car engine aluminum-base composite material Material.

Background technology

Aluminum matrix composite has high specific strength, specific stiffness, ratio elastic modelling quantity, also has preferably wear-resisting, resistance to simultaneously High-temperature behavior, has therefore suffered from extensive concern.Conventional particle enhanced aluminum-based composite material technology of preparing has powder metallurgic method With two kinds of techniques of casting.But the complex process equipment of powder metallurgic method, high expensive, be difficult to preparation large volume and complex-shaped Part.And there is the danger such as dust-firing and blast in process of production.Casting technique is simple, easy to operate, permissible Producing the composite of large volume, equipment investment is few, and production cost is low, suitable for mass production.

Graphene has very excellent physical property and mechanical performance it is considered to be optimal metal_based material because of it Reinforcement.But Graphene is very easy to reunite in metallic matrix, has become as restriction Graphene and strengthen Metal Substrate again The key factor of condensation material development.Gao Xin is in " preparation of Graphene reinforced aluminum matrix composites and mechanical property research " literary composition Using the graphene oxide containing a large amount of negative electrical charges for the Hummers preparation, then using cationic surfactant to process aluminium powder makes Its surface is with positive charge, and utilizes the mode of electrostatic self-assembled by the absorption of graphene uniform on aluminium powder surface, finally with The mode of hot pressed sintering prepares aluminum matrix composite, but the addition of the consumption of surfactant, Graphene all can affect burning Knot performance, relatively big on impacts such as the hardness of material, tensile strength, mechanical properties, quality of materials poor stability.

Content of the invention

The object of the invention is contemplated to make up the defect of prior art, provides a kind of high heat radiation car engine aluminum-base composite Material.

The present invention is achieved by the following technical solutions:

A kind of high heat radiation car engine aluminum matrix composite, is made up of the raw material of following weight portion: aluminium 95-98, glass Fiber 2-3, copper 0.3-0.5, nickel 0.1-0.2, zinc 1-1.2, zirconium 0.8-1, molybdenum 0.2-0.3, iron 1-1.4, cetyl trimethyl Ammonium bromide 0.06-0.1, graphene oxide 3-5, zircoium hydride 5-8, carbon trichloride 0.86-1, active lime 1.1-1.5, potassium sulfide 0.2-0.4, polyvinylpyrrolidone 0.25-0.3, ferrous sulfate 0.3-0.4, nano aluminum nitride 1.1-1.6, impurity≤0.01, Deionized water is appropriate.

Described a kind of high heat radiation car engine aluminum matrix composite, is made up of following concrete steps:

(1) by the cetyl trimethylammonium bromide deionized water dissolving of 6-8 times amount, the aluminium powder being subsequently adding total amount 10% surpasses Sound disperses 20-30min, then at room temperature magnetic agitation 1h, filter, washing, be dried after standby；Again graphene oxide is added to Aluminium powder is added in the deionized water of 100ml stirring and forms aluminum paste, by graphite oxide by ultrasonic disperse 1h in 50ml deionized water Aqueous solution is added to be stirred continuously in aluminum paste, until color becomes colorless transparent, filtration drying is standby；

(2) polyvinylpyrrolidone is added in the deionized water of 3 times amount, be heated to while stirring being completely dissolved rear and hexachloroethanc Alkane, active lime, potassium sulfide, ferrous sulfate, glass fibre mixing are added in high speed mixer, and the speed with 1000 revs/min is stirred Mix and send into extruding pelletization in comminutor after 10min, particle is sent in sintering furnace with 10 DEG C/min of ramp to 450 DEG C, burn Tying 2 hours, it is standby that taking-up is cooled to room temperature briquet；

(3) residue aluminium powder, copper, nickel, zinc, zirconium, molybdenum, iron mixing are added to ball milling in planetary ball mill, with argon gas as protection gas Atmosphere, crosses 400 mesh sieves after ball milling 4-5h, be then added in smelting furnace be heated to be semisolid, and stirring semi solid aluminum Base Metal limit adds Nano aluminum nitride, heating up, it is standby that solid-state mixed slurry is heated to liquid mixed slurry；

(4) the liquid slurry of step (3) is heated to 740-760 DEG C to refine, refining agent bell jar prepared by step (2) In press-in aluminium alloy, and it is in rotary moving to make even level, and refining time is 10-12min, stands 10-15min, then add after skimming Enter foaming agent zircoium hydride to stir, pour foaming groove after mixing into and foam under 620-700 DEG C of argon shield 0.5-2h；

(5) mould is preheated to 220-300 DEG C standby, then be placed in mixture prepared by step (1) in mould, by step (4) The foaming aluminium alloy obtaining is poured in mould, and pouring temperature is 650-680 DEG C, then naturally cools to room temperature i.e. available.

The invention have the advantage that the present invention uses surfactant to process part aluminium powder and makes its lotus that becomes positively charged, then and Electronegative graphene oxide is ultrasonically treated so that it is adsorbs on aluminium powder surface uniformly, agglomeration does not occur, it is achieved graphite Alkene is dispersed in aluminum alloy melt, and enhances the intensity of aluminum matrix composite, hardness, tensile strength and mechanical property etc., The double deoxidizer adding reacts with aluminum alloy melt, has good deoxidation, desulfurization, the effect of carburetting, and adds after refining Adding foaming agent, melt foaming processes and makes material and parent metal reaction fully, and compatibility is good, and preparation cost is low, technique letter Single；The aluminium of the present invention is high-strength, wear-resisting, thermal diffusivity is good, and shapes and do not have resilience, dimensionally stable, and this manufacturing process meets green Colour circle protects processing, disclosure satisfy that the demand of car engine, and can be mass-produced.

Detailed description of the invention

A kind of high heat radiation car engine aluminum matrix composite, is made up of the raw material of following weight portion (kilogram): aluminium 95th, the 0.06th, glass fibre the 2nd, copper the 0.3rd, nickel the 0.1st, zinc the 1st, zirconium the 0.8th, molybdenum the 0.2nd, iron the 1st, cetyl trimethylammonium bromide aoxidizes stone Ink alkene the 3rd, zircoium hydride the 5th, carbon trichloride the 0.86th, active lime the 1.1st, potassium sulfide the 0.2nd, polyvinylpyrrolidone the 0.25th, ferrous sulfate 0.3rd, nano aluminum nitride the 1.1st, impurity≤0.01, deionized water are appropriate.

Described a kind of high heat radiation car engine aluminum matrix composite, is made up of following concrete steps:

(1) by the cetyl trimethylammonium bromide deionized water dissolving of 6 times amount, the aluminium powder being subsequently adding total amount 10% is ultrasonic Dispersion 20min, then at room temperature magnetic agitation 1h, filter, washing, be dried after standby；Again graphene oxide is added to 50ml Aluminium powder is added in the deionized water of 100ml stirring and forms aluminum paste, by graphene oxide water by ultrasonic disperse 1h in deionized water Solution is added to be stirred continuously in aluminum paste, until color becomes colorless transparent, filtration drying is standby；

(2) polyvinylpyrrolidone is added in the deionized water of 3 times amount, be heated to while stirring being completely dissolved rear and hexachloroethanc Alkane, active lime, potassium sulfide, ferrous sulfate, glass fibre mixing are added in high speed mixer, and the speed with 1000 revs/min is stirred Mix and send into extruding pelletization in comminutor after 10min, particle is sent in sintering furnace with 10 DEG C/min of ramp to 450 DEG C, burn Tying 2 hours, it is standby that taking-up is cooled to room temperature briquet；

(3) residue aluminium powder, copper, nickel, zinc, zirconium, molybdenum, iron mixing are added to ball milling in planetary ball mill, with argon gas as protection gas Atmosphere, crosses 400 mesh sieves after ball milling 4h, be then added in smelting furnace be heated to be semisolid, and stirring semi solid aluminum Base Metal limit adds to be received Rice aluminium nitride, heating up, it is standby that solid-state mixed slurry is heated to liquid mixed slurry；

(4) the liquid slurry of step (3) is heated to 740 DEG C to refine, refining agent bell jar prepared by step (2) is pressed into In aluminium alloy, and it is in rotary moving to make even level, and refining time is 10min, stands 10min, add foaming agent hydrogen after skimming Change zirconium to stir, pour foaming groove after mixing into and foam under 620 DEG C of argon shields 0.5h；

(5) mould is preheated to 220 DEG C standby, then be placed in mixture prepared by step (1) in mould, step (4) obtained Foaming aluminium alloy be poured in mould, pouring temperature is 650 DEG C, then naturally cools to room temperature i.e. available.

The aluminum matrix composite preparing embodiment carries out performance test, and result is as follows:

Yield strength: 217MPa；Tensile strength: 252MPa；Have no progeny percentage of total elongation: 23.4%；Impact strength: 48J.

Claims (2)

1. one kind high heat radiation car engine aluminum matrix composite, it is characterised in that be made up of the raw material of following weight portion: Aluminium 95-98, glass fibre 2-3, copper 0.3-0.5, nickel 0.1-0.2, zinc 1-1.2, zirconium 0.8-1, molybdenum 0.2-0.3, iron 1-1.4, ten Six alkyl trimethyl ammonium bromide 0.06-0.1, graphene oxide 3-5, zircoium hydride 5-8, carbon trichloride 0.86-1, active lime 1.1-1.5, potassium sulfide 0.2-0.4, polyvinylpyrrolidone 0.25-0.3, ferrous sulfate 0.3-0.4, nano aluminum nitride 1.1- 1.6th, impurity≤0.01, deionized water are appropriate.

2. a kind of high heat radiation car engine aluminum matrix composite according to claim 1, it is characterised in that by following specifically Step is made:

(1) by the cetyl trimethylammonium bromide deionized water dissolving of 6-8 times amount, the aluminium powder being subsequently adding total amount 10% surpasses Sound disperses 20-30min, then at room temperature magnetic agitation 1h, filter, washing, be dried after standby；Again graphene oxide is added to Aluminium powder is added in the deionized water of 100ml stirring and forms aluminum paste, by graphite oxide by ultrasonic disperse 1h in 50ml deionized water Aqueous solution is added to be stirred continuously in aluminum paste, until color becomes colorless transparent, filtration drying is standby；

(2) polyvinylpyrrolidone is added in the deionized water of 3 times amount, be heated to while stirring being completely dissolved rear and hexachloroethanc Alkane, active lime, potassium sulfide, ferrous sulfate, glass fibre mixing are added in high speed mixer, and the speed with 1000 revs/min is stirred Mix and send into extruding pelletization in comminutor after 10min, particle is sent in sintering furnace with 10 DEG C/min of ramp to 450 DEG C, burn Tying 2 hours, it is standby that taking-up is cooled to room temperature briquet；

(3) residue aluminium powder, copper, nickel, zinc, zirconium, molybdenum, iron mixing are added to ball milling in planetary ball mill, with argon gas as protection gas Atmosphere, crosses 400 mesh sieves after ball milling 4-5h, be then added in smelting furnace be heated to be semisolid, and stirring semi solid aluminum Base Metal limit adds Nano aluminum nitride, heating up, it is standby that solid-state mixed slurry is heated to liquid mixed slurry；

(4) the liquid slurry of step (3) is heated to 740-760 DEG C to refine, refining agent bell jar prepared by step (2) In press-in aluminium alloy, and it is in rotary moving to make even level, and refining time is 10-12min, stands 10-15min, then add after skimming Enter foaming agent zircoium hydride to stir, pour foaming groove after mixing into and foam under 620-700 DEG C of argon shield 0.5-2h；

(5) mould is preheated to 220-300 DEG C standby, then be placed in mixture prepared by step (1) in mould, by step (4) The foaming aluminium alloy obtaining is poured in mould, and pouring temperature is 650-680 DEG C, then naturally cools to room temperature i.e. available.