CN103537694A - Powder metallurgy chain wheel and preparing method of powder metallurgy chain wheel - Google Patents

Abstract

The invention discloses a powder metallurgy chain wheel which is characterized by being made from the following raw materials: by weight, 2.0-2.2 parts of copper powder, 1.3-1.5 parts of nickel powder, 0.3-0.4 part of molybdenum powder, 1.0-1.2 parts of graphite, 0.23-0.25 part of scandium, 0.43-0.46 part of indium, 0.12-0.14 part of arsenic, 0.22-0.24 part of antimony, 2.3-3.0 parts of microcrystalline wax, 92-94 parts of iron powder and 1-2 parts of addition agents. Due to the fact that the graphite is added in the raw materials, abrasive resistance and lubricity of the chain wheel are improved; the manufactured chain wheel is of compact texture, good microstructure, good structural rigidity, good hardness, good fatigue resistance and good tensile strength performance, and holes in the chain wheel are few; besides, manufacturing cost is low, cost is low, and oil saving of an automobile engine is facilitated.

Description

Powder metallurgy chain wheel and preparation method thereof

Technical field

The present invention relates to field of powder metallurgy, particularly a kind of powder metallurgy chain wheel and preparation method thereof.

Background technology

Powder metallurgy be produce metal dust or with metal dust (or mixture of metal dust and non-metal powder) as raw material, through being shaped and sintering, produce the industrial technology of metal material, composite and all kinds goods.At present, PM technique has been widely used in the fields such as traffic, machinery, electronics, Aero-Space, weapons, biology, new forms of energy, information and nuclear industry, becomes one of branch of tool development vitality in new material science.That PM technique possesses is significantly energy-conservation, economize material, excellent performance, Product Precision is high and the series of advantages such as good stability, is very suitable for producing in enormous quantities.In addition, part material and the also available PM technique manufacture of complex parts that with conventional cast method and machining process, cannot prepare, thereby enjoy the attention of industrial quarters.Powder metallurgy structural part product material composition is not limited by melting, both can add alloying component, can add other structural constituent yet, and adjusts as requested in sizable scope, and then can reach the effect of mating with steel part in mechanical property.

Powder metallurgy mechanization degree is high, can reduce personnel, can raise the efficiency again, so that cost-saving.PM technique can replace traditional manufacturing process, for the vast traditional forms of enterprises cost-saving.

So study the formula of the powder metallurgy of various components of machine, adapt to different needs, have great importance.

Summary of the invention

The object of this invention is to provide a kind of powder metallurgy chain wheel and preparation method thereof.

In order to realize object of the present invention, the present invention passes through following scheme implementation:

, by the raw material of following weight portion, made: copper powder 2.0-2.2, nickel powder 1.3-1.5, molybdenum powder 0.3-0.4, graphite 1.0-1.2, Sc0.23-0.25, In0.43-0.46, As0.12-0.14, Sb0.22-0.24, microwax 2.3-3.0, iron powder 92-94, auxiliary agent 1-2;

Described auxiliary agent by following weight portion (kilogram) raw material make: iron powder 4, zinc oxide 2, titanium dioxide 2, sodium metaphosphate 2, kaolin powder 6, aluminum nitride powder 1, Silane coupling agent KH550 3, chromium boride 6, maleic anhydride 2, dimethicone 2, aluminate coupling agent DL-411 3, cyanuric acid zinc 2; Preparation method mixes iron powder, zinc oxide, titanium dioxide, sodium metaphosphate, kaolin powder, aluminum nitride powder, grind to form 200-300 order powder, then add Silane coupling agent KH550 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.Described powder metallurgy chain wheel, is made by following concrete steps: iron powder 3-4, zinc oxide 2-3, titanium dioxide 1-2, sodium metaphosphate 2-3, kaolin powder 5-6, aluminum nitride powder 1-2, Silane coupling agent KH550 2-3, chromium boride 5-6, maleic anhydride 2-3, dimethicone 1-2, aluminate coupling agent DL-411 2-3, cyanuric acid zinc 1-2; Preparation method mixes iron powder, zinc oxide, titanium dioxide, sodium metaphosphate, kaolin powder, aluminum nitride powder, grind to form 200-300 order powder, then add Silane coupling agent KH550 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.

(1) copper powder, nickel powder, molybdenum powder, Sc, In, iron powder are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 8-10Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-650 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other residual components is mixed;

(3) at 55-65 ℃, after mixing and stirring 65-85 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering furnace, with 6-8 ℃/min of speed, is warming up to sintering 1.5-2 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1100-1150 ℃ of condition; With 8-12 ℃/min of speed, be cooled to sintering 1-2 hour under 450-550 ℃ of condition again, in last air, be cooled to room temperature.

In raw material of the present invention, increase graphite, wearability and the lubricity of sprocket wheel have been increased, the sprocket wheel dense structure manufacturing, microstructure is good, and seldom, the rigidity of structure, hardness, fatigue performance, tensile strength properties are good for hole, cost of manufacture is simple, cost is low,, and be conducive to the fuel-economizing of automobile engine.

Specific embodiments

Below by instantiation, the present invention is described in detail.

, by following weight portion (kilogram) raw material make: copper powder 2.0, nickel powder 1.3, molybdenum powder 0.3, graphite 1.0, Sc0.23, In0.43, As0.12, Sb0.22, microwax 2.3, iron powder 92, auxiliary agent 1;

Described auxiliary agent by following weight portion (kilogram) raw material make: iron powder 4, zinc oxide 2, titanium dioxide 2, sodium metaphosphate 2, kaolin powder 6, aluminum nitride powder 1, Silane coupling agent KH550 3, chromium boride 6, maleic anhydride 2, dimethicone 2, aluminate coupling agent DL-411 3, cyanuric acid zinc 2; Preparation method mixes iron powder, zinc oxide, titanium dioxide, sodium metaphosphate, kaolin powder, aluminum nitride powder, grind to form 200-300 order powder, then add Silane coupling agent KH550 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.Described powder metallurgy chain wheel, by following concrete steps, made:

(1) copper powder, nickel powder, molybdenum powder, Sc, In, iron powder are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 8-10Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-650 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other residual components is mixed;

(3) at 55-65 ℃, after mixing and stirring 65-85 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering furnace, with 6-8 ℃/min of speed, is warming up to sintering 1.5-2 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1100-1150 ℃ of condition; With 8-12 ℃/min of speed, be cooled to sintering 1-2 hour under 450-550 ℃ of condition again, in last air, be cooled to room temperature.

Through detection, the hardness of flange of the present invention: HRC60; Tensile strength: 950MPa.

Claims (2)

1. a powder metallurgy chain wheel, it is characterized in that, by the raw material of following weight portion, made: copper powder 2.0-2.2, nickel powder 1.3-1.5, molybdenum powder 0.3-0.4, graphite 1.0-1.2, Sc0.23-0.25, In0.43-0.46, As0.12-0.14, Sb0.22-0.24, microwax 2.3-3.0, iron powder 92-94, auxiliary agent 1-2;

Described auxiliary agent is made by the raw material of following weight portion: iron powder 3-4, zinc oxide 2-3, titanium dioxide 1-2, sodium metaphosphate 2-3, kaolin powder 5-6, aluminum nitride powder 1-2, Silane coupling agent KH550 2-3, chromium boride 5-6, maleic anhydride 2-3, dimethicone 1-2, aluminate coupling agent DL-411 2-3, cyanuric acid zinc 1-2; Preparation method mixes iron powder, zinc oxide, titanium dioxide, sodium metaphosphate, kaolin powder, aluminum nitride powder, grind to form 200-300 order powder, then add Silane coupling agent KH550 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 ℃ and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other residual components, be heated to 60-70 ℃, under 1200-1500 rev/min, stir 1-2 hour, obtain.

2. powder metallurgy chain wheel according to claim 1, is characterized in that, by following concrete steps, is made:

(1) copper powder, nickel powder, molybdenum powder, Sc, In, iron powder are mixed, add in suitable quantity of water, send into ball milling in ball mill, obtain 250-400 order powder, then, spraying is dry, oven dry, under 8-10Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-650 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other residual components is mixed;

(3) at 55-65 ℃, after mixing and stirring 65-85 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering furnace, with 6-8 ℃/min of speed, is warming up to sintering 1.5-2 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1100-1150 ℃ of condition; With 8-12 ℃/min of speed, be cooled to sintering 1-2 hour under 450-550 ℃ of condition again, in last air, be cooled to room temperature.