CN103600062A - Powder metallurgy alloy composite material and manufacturing method thereof - Google Patents

Abstract

The invention discloses a powder metallurgy alloy composite material. The powder metallurgy alloy composite material is characterized by being manufactured by, by weight, graphite 1.1-1.2 parts, chromium 15.1-15.8 parts, nickel 3.1-3.4 parts, copper 1.1-1.3 part, manganese 5.1-5.6 parts, niobium 0.5-0.8 part, iron powder 88-91 parts, Ti 2.5-2.7 parts, Be 0.2-0.4 part, In 0.5-0.75 part, Th 0.3-0.5 part and assistant 2-3 parts. The assistant added into the material enables alloy powder to be dispersed evenly, ensures the longitudinal and transverse uniformity of an internal organizational structure of a product, and enables the fatigue life of the product to be prolonged to some extent. The manufactured powder metallurgy alloy composite material is large in bearing pressure, compact in texture, good in microstructure and excellent in structural rigidity, hardness and tensile strength performance. In addition, due the fact that mould pressing is adopted, a device is simplified, the production cost is reduced, and the material can be used for part manufacture in machinery, automobile, chemical engineering industries and the like.

Description

A kind of sintered alloy composite and preparation method thereof

Technical field

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

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

A sintered alloy composite, is made by the raw material of following weight portion: graphite 1.1-1.2, chromium 15.1-15.8, nickel 3.1-3.4, copper 1.1-1.3, manganese 5.1-5.6, niobium 0.5-0.8, iron powder 88-91, Ti 2.5-2.7, Be 0.2-0.4, In 0. 5-0.75, Th 0.3-0.5, auxiliary agent 2-3;

Described auxiliary agent is made by the raw material of following weight portion: iron powder 30-40, aluminum sulfate 3-4, PTPP 1-2, celestite powder 2-3, stalk ashes 1-2, Silane coupling agent KH550 1-2, dimethicone 3-4, isopropyl distearyl acyl-oxygen base Aluminate 1-2, zinc oxide 2-3; Preparation method mixes iron powder, aluminum sulfate, PTPP, celestite powder, stalk ashes, 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.

Sintered alloy composite of the present invention, by following concrete steps, made:

(1) chromium, nickel, copper, manganese, niobium, iron powder, Ti, Be, In, Th 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 9-11Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 700-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other residual components is added by step (1) material, at 60-65 ℃, after mixing and stirring 75-95 minute, pack mould into, be pressed into base;

(3) pressed compact is placed in sintering furnace, with 9-12 ℃/min of speed, is warming up to sintering 1-2 hour under 350-450 ℃ of condition, then be warming up to sintering 1.5-2 hour under 650-750 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1085-1150 ℃ of condition; In last air, be cooled to room temperature.

The present invention adds auxiliary agent, and alloy powder is uniformly dispersed, and guarantees the uniformity in length and breadth of interiors of products institutional framework, and increased the fatigue life of product; Bearing capacity of the present invention is strong, the alloy composite materials dense structure of manufacture, and microstructure is good, and the rigidity of structure, hardness, tensile strength properties are good.And owing to having adopted mold pressing, make simplified equipment, and reduced production cost, can be used for the industry parts such as manufacturing machine, automobile, chemical industry.

Specific embodiments

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

A sintered alloy composite, by following weight portion (kilogram) raw material make: graphite 1.1, chromium 15.1, nickel 3.1, copper 1.1, manganese 5.1, niobium 0.5, iron powder 88, Ti 2.5, Be 0.2, In 0. 5, Th 0.3, auxiliary agent 2;

Described auxiliary agent by following weight portion (kilogram) raw material make: iron powder 30, aluminum sulfate 3, PTPP 1, celestite powder 2, stalk ashes 1, Silane coupling agent KH550 1, dimethicone 3, isopropyl distearyl acyl-oxygen base Aluminate 1, zinc oxide 2; Preparation method mixes iron powder, aluminum sulfate, PTPP, celestite powder, stalk ashes, 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.

Sintered alloy composite of the present invention, by following concrete steps, made:

(1) chromium, nickel, copper, manganese, niobium, iron powder, Ti, Be, In, Th 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 9-11Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 700-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other residual components is added by step (1) material, at 60-65 ℃, after mixing and stirring 75-95 minute, pack mould into, be pressed into base;

(3) pressed compact is placed in sintering furnace, with 9-12 ℃/min of speed, is warming up to sintering 1-2 hour under 350-450 ℃ of condition, then be warming up to sintering 1.5-2 hour under 650-750 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1085-1150 ℃ of condition; In last air, be cooled to room temperature.

Through detection, hardness of the present invention: HRC54; Tensile strength: 1095MPa.

Claims (2)

1. a sintered alloy composite, it is characterized in that, by the raw material of following weight portion, made: graphite 1.1-1.2, chromium 15.1-15.8, nickel 3.1-3.4, copper 1.1-1.3, manganese 5.1-5.6, niobium 0.5-0.8, iron powder 88-91, Ti 2.5-2.7, Be 0.2-0.4, In 0. 5-0.75, Th 0.3-0.5, auxiliary agent 2-3;

Described auxiliary agent is made by the raw material of following weight portion: iron powder 30-40, aluminum sulfate 3-4, PTPP 1-2, celestite powder 2-3, stalk ashes 1-2, Silane coupling agent KH550 1-2, dimethicone 3-4, isopropyl distearyl acyl-oxygen base Aluminate 1-2, zinc oxide 2-3; Preparation method mixes iron powder, aluminum sulfate, PTPP, celestite powder, stalk ashes, 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. sintered alloy composite according to claim 1, is characterized in that, by following concrete steps, is made:

(1) chromium, nickel, copper, manganese, niobium, iron powder, Ti, Be, In, Th 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 9-11Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 700-750 ℃ carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other residual components is added by step (1) material, at 60-65 ℃, after mixing and stirring 75-95 minute, pack mould into, be pressed into base;

(3) pressed compact is placed in sintering furnace, with 9-12 ℃/min of speed, is warming up to sintering 1-2 hour under 350-450 ℃ of condition, then be warming up to sintering 1.5-2 hour under 650-750 ℃ of condition with 6-8 ℃/min of speed; Then with 5-7 ℃/min of speed, be warming up to sintering 2-3 hour under 1085-1150 ℃ of condition; In last air, be cooled to room temperature.