CN103567448A - Powder metallurgy wind power pivoting support and preparation method thereof - Google Patents

Abstract

The invention discloses a powder metallurgy wind power pivoting support, which is characterized in that the support is made of the following raw materials in parts by weight: 0.2-0.3 parts of graphite, 3.1-3.3 parts of silicon, 2.8-3.0 parts of manganese, 1.9-2.3 parts of chromium, 3.2-3.3 parts of molybdenum, 6.8-7.0 parts of aluminum, 0.2-0.3 parts of copper, 0.06-0.08 parts of Nb, 0.4-0.6 parts of tungsten carbide, 0.3-0.5 parts of TiC, 0.1-0.2 parts of hafnium diboride, 0.1-0.2 parts of Ti, 0.10-0.18 parts of Ta, 3-4 parts of microcrystalline wax, 87-89 parts of iron powder and 1-2 parts of assistant. The powder metallurgy wind power pivoting support is reasonable in formula, and the manufactured pivoting support is high in supporting strength, high in pressure bearing capability, compact in tissue, good in microstructure, very small in pore, and excellent in structural stiffness, hardness, fatigue performance, weather resistance and tensile strength; the pollution to the environment is small, the production steps are simple, and the production efficiency is improved.

Description

A kind of powder metallurgy wind-powered electricity generation pivoting support and preparation method thereof

Technical field

The present invention relates to field of powder metallurgy, particularly a kind of powder metallurgy wind-powered electricity generation pivoting support and preparation method thereof.

Background technology

Pivoting support is between all two parts, to need revolution relatively to bear again the mechanical power transmission base components of axial force, radial load and tilting moment simultaneously.Its basic function is to adopt bolt to be fixed on the upper and lower bearing of plant equipment, carries out power transmission and transmission, realizes the relative revolution between plant equipment two parts.Pivoting support is generally all with installing hole, internal gear or external gear, lubrication hole and sealing device, has compact conformation, a feature such as lightweight, structure rigidity is good, smooth running, precision are high, safe and reliable.Pivoting support is the base parts and components in plant equipment; application in national economy every profession and trade is very extensive, and this product is widely used in the industries such as engineering machinery, harbour machinery, metallurgical machinery, mining machinery, petroleum machinery, chemical machinery, Medical Devices, ship machinery, light industry and machinery, environmental protection machinery, amusement equipment, Transport Machinery and military equipment.Pivoting support is used more and more in energy-conserving and environment-protective project now, as wind power generating set needs the pivoting support of the multiple accurate utmost point supporting.

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 powder metallurgy wind-powered electricity generation pivoting support that a kind of cost is low, intensity is high, plasticity is good and preparation method thereof.

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

A wind-powered electricity generation pivoting support, is made by the raw material of following weight portion: graphite 0.2-0.3, silicon 3.1-3.3, manganese 2.8-3.0, chromium 1.9-2.3, molybdenum 3.2-3.3, aluminium 6.8-7.0, copper 0.2-0.3, Nb0.06-0.08, tungsten carbide 0.4-0.6, TiC0.3-0.5, hafnium boride 0.1-0.2, Ti0.1-0.2, Ta0.10-0.18, microwax 3-4, iron powder 87-89, auxiliary agent 1-2;

Described auxiliary agent is made by the raw material of following weight portion: iron powder 3-4, kaolin 2-3, nano-sized carbon 1-2, zirconium fluoride 1-2, alum 2-3, sodium alginate 2-3, sodium phosphate trimer 1-2, schmigel 2-3, copper sulphate 1-2, calcium stearate 1-2, VTES 2-3; Preparation method mixes iron powder, kaolin, zirconium fluoride, alum, sodium alginate, sodium phosphate trimer, schmigel, copper sulphate, grind to form 200-300 order powder, then add VTES 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 wind-powered electricity generation pivoting support of the present invention, by following concrete steps, made:

(1) manganese, chromium, molybdenum, aluminium, copper, Ti, Ta, 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 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ 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 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering furnace, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.

The present invention fills a prescription rationally, and the pivoting support intensity of manufacture is high, bearing capacity Qiang， dense structure, and microstructure is good, and seldom, the rigidity of structure, hardness, fatigue performance, weather resistance, tensile strength properties are good for hole; Environmental pollution of the present invention is little, and production stage is simple, has improved production efficiency.

The specific embodiment

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

A wind-powered electricity generation pivoting support, by following weight portion (kilogram) raw material make: graphite 0.2, silicon 3.1, manganese 2.8, chromium 1.9, molybdenum 3.2, aluminium 6.8, copper 0.2, Nb0.06, tungsten carbide 0.4, TiC0.3, hafnium boride 0.1, Ti0.1, Ta0.10, microwax 3, iron powder 87, auxiliary agent 1;

Described auxiliary agent by following weight portion (kilogram) raw material make: iron powder 3, kaolin 2, nano-sized carbon 2, zirconium fluoride 1, alum 2, sodium alginate 3, sodium phosphate trimer 1, schmigel 3, copper sulphate 1, calcium stearate 1, VTES 3; Preparation method mixes iron powder, kaolin, zirconium fluoride, alum, sodium alginate, sodium phosphate trimer, schmigel, copper sulphate, grind to form 200-300 order powder, then add VTES 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 wind-powered electricity generation pivoting support of the present invention, by following concrete steps, made:

(1) manganese, chromium, molybdenum, aluminium, copper, Ti, Ta, 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 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ 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 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering furnace, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.

Through detection, hardness of the present invention: HRC60; Tensile strength: 825MPa.

Claims (2)

1. a powder metallurgy wind-powered electricity generation pivoting support, it is characterized in that, by the raw material of following weight portion, made: graphite 0.2-0.3, silicon 3.1-3.3, manganese 2.8-3.0, chromium 1.9-2.3, molybdenum 3.2-3.3, aluminium 6.8-7.0, copper 0.2-0.3, Nb0.06-0.08, tungsten carbide 0.4-0.6, TiC0.3-0.5, hafnium boride 0.1-0.2, Ti0.1-0.2, Ta0.10-0.18, microwax 3-4, iron powder 87-89, auxiliary agent 1-2;

Described auxiliary agent is made by the raw material of following weight portion: iron powder 3-4, kaolin 2-3, nano-sized carbon 1-2, zirconium fluoride 1-2, alum 2-3, sodium alginate 2-3, sodium phosphate trimer 1-2, schmigel 2-3, copper sulphate 1-2, calcium stearate 1-2, VTES 2-3; Preparation method mixes iron powder, kaolin, zirconium fluoride, alum, sodium alginate, sodium phosphate trimer, schmigel, copper sulphate, grind to form 200-300 order powder, then add VTES 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 wind-powered electricity generation pivoting support according to claim 1, is characterized in that, by following concrete steps, is made:

(1) manganese, chromium, molybdenum, aluminium, copper, Ti, Ta, 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 12-15Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-750 ℃ 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 62-66 ℃, after mixing and stirring 70-90 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering furnace, with 8-12 ℃/min of speed, is warming up to sintering 1-2 hour under 450-550 ℃ of condition, then be warming up to sintering 1.5-2 hour under 800-850 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1050-1150 ℃ of condition; In air, be cooled to room temperature.