CN103567434A - Powder metallurgy flange and preparation method thereof - Google Patents

Abstract

The invention discloses a powder metallurgy flange, which is characterized in that the flange is made of the following raw materials in parts by weight: 1.2-1.4 parts of titanium hydride, 2.0-2.2 parts of zirconium hydride, 0.2-0.4 parts of Sb, 1.2-1.4 parts of V, 2.3-2.5 parts of Mo, 0.4-0.5 parts of Ga, 1.0-1.2 parts of graphene, 3.1-3.3 parts of stearic acid zinc salt, 92-94 parts of iron powder and 1-2 parts of assistant. Through adding fine-particle alloy element powder, the diffusion is uniform in a sintering process; the uniformity of material structures is improved, the high temperature performance and the normal temperature brittleness of the materials are improved, and the produced flange is high in tensile strength and air tightness, and uniform in organizational structure, and can be widely adapted to various environments.

Description

A kind of powder metallurgy flange and preparation method thereof

Technical field

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

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

A flange, is made by the raw material of following weight portion: titantium hydride 1.2-1.4, zircoium hydride 2.0-2.2, Sb0.2-0.4, V1.2-1.4, Mo2.3-2.5, Ga0.4-0.5, Graphene 1.0-1.2, zinc stearate 3.1-3.3, 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.

Powder metallurgy flange of the present invention, by following concrete steps, made:

(1) titantium hydride, zircoium hydride, Sb, V, Mo, 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 5-8Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 500-650 ℃ 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 52-56 ℃, after mixing and stirring 60-90 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 2-3 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; Then, then be cooled to 725-750 ℃ with 10-12 ℃/min of speed, be incubated after 1-2 hour, then to be cooled to 320-340 ℃ with 8-10 ℃/min of speed again, be incubated after 2-3 hour, in air, slow cooling is to room temperature.

By adding the tiny alloying element powder of particle, make sintering process diffusion evenly; Improved the uniformity of material structure, improved high-temperature behavior and the cold-shortness of material, its tensile strength of the flange of production, the high institutional framework of air-tightness are even, are extensively adapted to each environment.

Specific embodiments

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

A flange, by following weight portion (kilogram) raw material make: titantium hydride 1.2, zircoium hydride 2.0, Sb0.2, V1.2, Mo2.3, Ga0.4, Graphene 1.0, zinc stearate 3.1, 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.Powder metallurgy flange of the present invention, by following concrete steps, made:

(1) titantium hydride, zircoium hydride, Sb, V, Mo, 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 5-8Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 500-650 ℃ 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 52-56 ℃, after mixing and stirring 60-90 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 2-3 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; Then, then be cooled to 725-750 ℃ with 10-12 ℃/min of speed, be incubated after 1-2 hour, then to be cooled to 320-340 ℃ with 8-10 ℃/min of speed again, be incubated after 2-3 hour, in air, slow cooling is to room temperature.

Through detection, the heat treatment hardness of flange of the present invention: HRC57; Tensile strength: 1150MPa.

Claims (2)

1. a powder metallurgy flange, it is characterized in that, by the raw material of following weight portion, made: titantium hydride 1.2-1.4, zircoium hydride 2.0-2.2, Sb0.2-0.4, V1.2-1.4, Mo2.3-2.5, Ga0.4-0.5, Graphene 1.0-1.2, zinc stearate 3.1-3.3, 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 flange according to claim 1, is characterized in that, by following concrete steps, is made:

(1) titantium hydride, zircoium hydride, Sb, V, Mo, 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 5-8Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 500-650 ℃ 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 52-56 ℃, after mixing and stirring 60-90 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 2-3 hour under 800-850 ℃ of condition; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; Then, then be cooled to 725-750 ℃ with 10-12 ℃/min of speed, be incubated after 1-2 hour, then to be cooled to 320-340 ℃ with 8-10 ℃/min of speed again, be incubated after 2-3 hour, in air, slow cooling is to room temperature.