CN105908019A - Composite material for gear disk and preparation method of composite material for gear disk - Google Patents

Abstract

The invention discloses a composite material for a gear disk and a preparation method of the composite material for the gear disk. The composite material is prepared from, by weight, 95-98 parts of aluminum, 0.1-0.14 part of bismuth, 0.03-0.05 part of niobium, 0.21-0.23 part of molybdenum, 0.2-0.23 part of carbon, 1.8-2.5 parts of iron, 0.25-0.34 part of silicon, 0.06-0.1 part of cetyl trimethyl ammonium bromide, 3-5 parts of graphene oxide, 5-8 parts of zirconium hydride, 0.8-1 part of hexachloroethane, 0.2-0.3 part of silica sand, 0.25-0.3 part of carboxymethyl cellulose, 0.3-0.35 part of calcium fluoride, 1.2-2 parts of titanium carbide, smaller than or equal to 0.01 part of impurities and a proper amount of deionized water. The composite material has good strength and high elongation percentage, the crack resistance is good, the fatigue resistance is high, the composite material is long in service life when used for the automobile gear disk, the maintaining frequency is reduced, and cost is reduced.

Description

A kind of toothed disc composite and preparation method thereof

Technical field

The present invention relates to technical field of automobile parts, particularly relate to a kind of toothed disc composite and preparation method thereof.

Background technology

Aluminum matrix composite has high specific strength, specific stiffness, ratio elastic modelling quantity, the most also has the most wear-resisting, resistance to elevated temperatures, has therefore suffered from paying close attention to widely.Conventional particle enhanced aluminum-based composite material technology of preparing has powder metallurgic method and two kinds of techniques of casting.But the complex process equipment of powder metallurgic method, high expensive, be difficult to prepare 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, can produce the composite of large volume, and equipment investment is few, and production cost is low, suitable for mass production.

Graphene has the most excellent physical property and mechanical performance it is considered to be optimal metal_based material reinforcement because of it.But Graphene is very easy to reunite in metallic matrix, has become as the key factor of restriction graphene reinforced metal-matrix composite development.Gao Xin uses the Hummers preparation graphene oxide containing a large amount of negative charges in " preparation of Graphene reinforced aluminum matrix composites and mechanical property research " literary composition, then using cationic surfactant to process aluminium powder makes its surface with positive charge, and utilize the mode of electrostatic self-assembled by the absorption of graphene uniform on aluminium powder surface, finally in the way of hot pressed sintering, prepare aluminum matrix composite, but the consumption of surfactant, the addition of Graphene all can affect sintering character, hardness to material, tensile strength, the impact such as mechanical property is bigger, quality of materials poor stability.

Summary of the invention

The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of toothed disc composite and preparation method thereof and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of toothed disc composite and preparation method thereof, is made up of the raw material of following weight portion: aluminum 95-98, bismuth 0.1-0.14, niobium 0.03-0.05, molybdenum 0.21-0.23, carbon 0.2-0.23, ferrum 1.8-2.5, silicon 0.25-0.34, cetyl trimethylammonium bromide 0.06-0.1, graphene oxide 3-5, zircoium hydride 5-8, hexachlorethane 0.8-1, silica sand 0.2-0.3, carboxymethyl cellulose 0.25-0.3, calcium fluoride 0.3-0.35, titanium carbide 1.2-2, impurity≤0.01, deionized water are appropriate.

Described a kind of toothed disc composite and preparation method thereof, is made up of following concrete steps:

(1) by the cetyl trimethylammonium bromide deionized water dissolving of 6-8 times amount, it is subsequently adding the aluminium powder ultrasonic disperse 20-30min of total amount 10%, the most at room temperature magnetic agitation 1h, filters, wash, the most standby；Graphene oxide being added to ultrasonic disperse 1h again in 50ml deionized water, aluminium powder is added in the deionized water of 100ml stirring and forms aluminum paste, be added to graphene oxide water solution in aluminum paste be stirred continuously, until color becomes colorless transparent, filtration drying is standby；

(2) carboxymethyl cellulose is added in the deionized water of 3 times amount; mix with hexachlorethane, silica sand, calcium fluoride after being heated to while stirring being completely dissolved and be added in high speed mixer; extruding pelletization in comminutor is sent into after stirring 10min with the speed of 1000 revs/min; granule is sent in sintering furnace with 10 DEG C/min of ramp to 450 DEG C; sintering 2 hours, it is standby that taking-up is cooled to room temperature briquet；

(3) residue aluminium powder, bismuth, niobium, molybdenum, carbon, ferrum, silicon mixing are added to ball milling in planetary ball mill; with argon as protective atmosphere; 400 mesh sieves are crossed after ball milling 4-5h; it is then added in smelting furnace be heated to be semisolid; stirring semi solid aluminum Base Metal limit adds titanium carbide, and 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 and carries out refine; in refining agent bell jar press-in aluminium alloy prepared by step (2); and it is in rotary moving to make even level; refining time is 10-12min; 10-15min is stood after skimming; add foaming agent zircoium hydride to stir, pour foaming groove after mix homogeneously 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 mixture prepared by step (1) is placed in mould, the foaming aluminium alloy that step (4) obtains is poured in mould, pouring temperature is 650-680 DEG C, then naturally cools to room temperature the most 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 with electronegative graphene oxide supersound process, it is made to adsorb on aluminium powder surface uniformly, there is not agglomeration, realize Graphene dispersed in aluminum alloy melt, and enhance the intensity of aluminum matrix composite, hardness, tensile strength and mechanical property etc., the double deoxidizer added reacts with aluminum alloy melt, there is good deoxidation, desulfurization, the effect of carburetting, and after refine, add foaming agent, melt foaming processes and makes material and parent metal reaction fully, the compatibility is good, and preparation cost is low, technique is simple；The present invention has preferable intensity and percentage elongation, and crack resistance is good, and fatigue durability is high, has preferable service life for automobile gear dish, reduces maintenance frequency, reduces cost.

Detailed description of the invention

A kind of toothed disc composite and preparation method thereof, is made up of the raw material of following weight portion (kilogram): aluminum 95, bismuth 0.1, niobium 0.03, molybdenum 0.21, carbon 0.2, ferrum 1.8, silicon 0.25, cetyl trimethylammonium bromide 0.06, graphene oxide 3, zircoium hydride 5, hexachlorethane 0.8, silica sand 0.2, carboxymethyl cellulose 0.25, calcium fluoride 0.3, titanium carbide 1.2, impurity≤0.01, deionized water are appropriate.

Described a kind of toothed disc composite and preparation method thereof, is made up of following concrete steps:

(1) by the cetyl trimethylammonium bromide deionized water dissolving of 6 times amount, it is subsequently adding the aluminium powder ultrasonic disperse 20min of total amount 10%, the most at room temperature magnetic agitation 1h, filters, wash, the most standby；Graphene oxide being added to ultrasonic disperse 1h again in 50ml deionized water, aluminium powder is added in the deionized water of 100ml stirring and forms aluminum paste, be added to graphene oxide water solution in aluminum paste be stirred continuously, until color becomes colorless transparent, filtration drying is standby；

(2) carboxymethyl cellulose is added in the deionized water of 3 times amount; mix with hexachlorethane, silica sand, calcium fluoride after being heated to while stirring being completely dissolved and be added in high speed mixer; extruding pelletization in comminutor is sent into after stirring 10min with the speed of 1000 revs/min; granule is sent in sintering furnace with 10 DEG C/min of ramp to 450 DEG C; sintering 2 hours, it is standby that taking-up is cooled to room temperature briquet；

(3) residue aluminium powder, bismuth, niobium, molybdenum, carbon, ferrum, silicon mixing are added to ball milling in planetary ball mill; with argon as protective atmosphere; 400 mesh sieves are crossed after ball milling 4h; it is then added in smelting furnace be heated to be semisolid; stirring semi solid aluminum Base Metal limit adds titanium carbide, and 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 and carries out refine; in refining agent bell jar press-in aluminium alloy prepared by step (2); and it is in rotary moving to make even level; refining time is 10min; 10min is stood after skimming; add foaming agent zircoium hydride to stir, pour foaming groove after mix homogeneously into and foam under 620 DEG C of argon shields 0.5h；

(5) mould is preheated to 220 DEG C standby, then mixture prepared by step (1) is placed in mould, the foaming aluminium alloy that step (4) obtains is poured in mould, pouring temperature is 650 DEG C, then naturally cools to room temperature the most available.

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

Yield strength: 228MPa；Tensile strength: 252MPa；Have no progeny percentage of total elongation: 21.3%；Impact strength: 44J.

Claims (2)

1. toothed disc composite and preparation method thereof, it is characterized in that, be made up of the raw material of following weight portion: aluminum 95-98, bismuth 0.1-0.14, niobium 0.03-0.05, molybdenum 0.21-0.23, carbon 0.2-0.23, ferrum 1.8-2.5, silicon 0.25-0.34, cetyl trimethylammonium bromide 0.06-0.1, graphene oxide 3-5, zircoium hydride 5-8, hexachlorethane 0.8-1, silica sand 0.2-0.3, carboxymethyl cellulose 0.25-0.3, calcium fluoride 0.3-0.35, titanium carbide 1.2-2, impurity≤0.01, deionized water are appropriate.

A kind of toothed disc composite and preparation method thereof, it is characterised in that be made up of following concrete steps:

(1) by the cetyl trimethylammonium bromide deionized water dissolving of 6-8 times amount, it is subsequently adding the aluminium powder ultrasonic disperse 20-30min of total amount 10%, the most at room temperature magnetic agitation 1h, filters, wash, the most standby；Graphene oxide being added to ultrasonic disperse 1h again in 50ml deionized water, aluminium powder is added in the deionized water of 100ml stirring and forms aluminum paste, be added to graphene oxide water solution in aluminum paste be stirred continuously, until color becomes colorless transparent, filtration drying is standby；

(2) carboxymethyl cellulose is added in the deionized water of 3 times amount; mix with hexachlorethane, silica sand, calcium fluoride after being heated to while stirring being completely dissolved and be added in high speed mixer; extruding pelletization in comminutor is sent into after stirring 10min with the speed of 1000 revs/min; granule is sent in sintering furnace with 10 DEG C/min of ramp to 450 DEG C; sintering 2 hours, it is standby that taking-up is cooled to room temperature briquet；

(3) residue aluminium powder, bismuth, niobium, molybdenum, carbon, ferrum, silicon mixing are added to ball milling in planetary ball mill; with argon as protective atmosphere; 400 mesh sieves are crossed after ball milling 4-5h; it is then added in smelting furnace be heated to be semisolid; stirring semi solid aluminum Base Metal limit adds titanium carbide, and 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 and carries out refine; in refining agent bell jar press-in aluminium alloy prepared by step (2); and it is in rotary moving to make even level; refining time is 10-12min; 10-15min is stood after skimming; add foaming agent zircoium hydride to stir, pour foaming groove after mix homogeneously 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 mixture prepared by step (1) is placed in mould, the foaming aluminium alloy that step (4) obtains is poured in mould, pouring temperature is 650-680 DEG C, then naturally cools to room temperature the most available.