CN104120367A - High-hardness flange prepared by employing powder metallurgy and preparation method thereof - Google Patents

Abstract

The invention discloses a high-hardness flange prepared by employing powder metallurgy. The high-hardness flange is characterized by being prepared from the following raw materials in parts by weight: 3.4-3.8 parts of chromium, 4.1-4.3 parts of manganese, 1.2-1.4 parts of silicon, 0.4-0.8 part of boron, 8.2-8.4 parts of nickel, 74.4-74.8 parts of ferrous powder, 2.1-2.3 parts of Si, 3.5-4.3 parts of Cu, 2.5-2.8 parts of Zn, 4.2-4.4 parts of Mg and 2-3 parts of an assistant. By adding a copper element, the handlability of the product is increased, and the prepared flange is high in hardness, compact in texture, good in microstructure, few in holes, and excellent in structural stiffness, hardness, fatigue resistance and tensile strength. A mold pressing mode is adopted, so that the equipment is simplified, and the production cost is reduced.

Description

A kind of powder metallurgy high rigidity flange and preparation method thereof

Technical field

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

background technology

Powder metallurgy be produce metal-powder or with metal-powder (or mixture of metal-powder and non-metal powder) as raw material, through being shaped and sintering, produce the industrial technology of metallic substance, matrix material and all kinds goods.At present, powder metallurgy technology has been widely used in the fields such as traffic, machinery, electronics, aerospace, weapons, biology, new forms of energy, information and nuclear industry, becomes one of branch of tool development vitality in novel material science.That powder metallurgy technology possesses is significantly energy-conservation, economize material, excellent performance, Product Precision are high and the series of advantages such as good stability, is very suitable for producing in enormous quantities.In addition, material and complicated shape that part cannot be prepared with conventional cast method and machining process also can be used powder metallurgy technology manufacture, thereby enjoy the attention of industry member.Powder metallurgy structural part product material composition is not limited by melting, both can add alloying constituent, 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.Powder metallurgy technology 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 high rigidity flange and preparation method thereof.

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

A kind of powder metallurgy high rigidity flange, is made up of the raw material of following weight part: chromium 3.4-3.8, manganese 4.1-4.3, silicon 1.2-1.4, boron 0.4-0.8, nickel 8.2-8.4, iron powder 74.4-74.8, Si 2.1-2.3, Cu 3.5-4.3, Zn 2.5-2.8, Mg 4.2-4.4, auxiliary agent 2-3;

Described auxiliary agent is made up of the raw material of following weight part: iron powder 30-34, aluminium hydroxide 2-3, zinc sulfate 1-2, medical stone 1-2, nano-sized carbon 1-2, jade 2-3, polyisobutene 2-3, aluminate coupling agent DL-411 1-2, carborundum powder 2-3; Preparation method mixes iron powder, aluminium hydroxide, zinc sulfate, medical stone, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 DEG C and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other remaining component, be heated to 60-70 DEG C, under 1200-1500 rev/min, stir 1-2 hour, to obtain final product.

Powder metallurgy high rigidity flange of the present invention, is characterized in that, is made up of following concrete steps:

(1) chromium, manganese, nickel, iron powder, Cu, Zn, Mg 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 8-11Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-650 DEG C carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other remaining component is mixed;

(3) at 55-65 DEG C, after mixing and stirring 65-95 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering oven, is warming up to sintering 1-2 hour under 350-450 DEG C of condition with 9-12 DEG C/min of speed; Then be warming up to sintering 2-3 hour under 1100-1150 DEG C of condition with 5-7 DEG C/min of speed; In last air, be cooled to room temperature.

The present invention increases copper, has increased the handlability of goods, and the flange hardness of manufacture is high, dense structure, and microtexture is good, and hole is little, and structural rigidity, hardness, fatigue performance, tensile strength properties are good.And owing to having adopted mold pressing, make simplified equipment, reduce production cost.

Specific embodiments

Below by specific examples, the present invention is described in detail.

A kind of powder metallurgy high rigidity flange, by following weight part (kilogram) raw material make: chromium 3.4, manganese 4.1, silicon 1.2, boron 0.4, nickel 8.2, iron powder 74.4, Si 2.1, Cu 3.5, Zn 2.5, Mg 4.2, auxiliary agent 2;

Described auxiliary agent by following weight part (kilogram) raw material make: iron powder 30, aluminium hydroxide 2, zinc sulfate 1, medical stone 1, nano-sized carbon 1, jade 2, polyisobutene 2, aluminate coupling agent DL-411 1, carborundum powder 2; Preparation method mixes iron powder, aluminium hydroxide, zinc sulfate, medical stone, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 DEG C and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other remaining component, be heated to 60-70 DEG C, under 1200-1500 rev/min, stir 1-2 hour, to obtain final product.

Powder metallurgy high rigidity flange of the present invention, is characterized in that, is made up of following concrete steps:

(1) chromium, manganese, nickel, iron powder, Cu, Zn, Mg 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 8-11Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-650 DEG C carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other remaining component is mixed;

(3) at 55-65 DEG C, after mixing and stirring 65-95 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering oven, is warming up to sintering 1-2 hour under 350-450 DEG C of condition with 9-12 DEG C/min of speed; Then be warming up to sintering 2-3 hour under 1100-1150 DEG C of condition with 5-7 DEG C/min of speed; In last air, be cooled to room temperature.

Through detection, hardness of the present invention: HRC59; Tensile strength: 1070MPa.

Claims (2)

1. a powder metallurgy high rigidity flange, it is characterized in that, made by the raw material of following weight part: chromium 3.4-3.8, manganese 4.1-4.3, silicon 1.2-1.4, boron 0.4-0.8, nickel 8.2-8.4, iron powder 74.4-74.8, Si 2.1-2.3, Cu 3.5-4.3, Zn 2.5-2.8, Mg 4.2-4.4, auxiliary agent 2-3;

Described auxiliary agent is made up of the raw material of following weight part: iron powder 30-34, aluminium hydroxide 2-3, zinc sulfate 1-2, medical stone 1-2, nano-sized carbon 1-2, jade 2-3, polyisobutene 2-3, aluminate coupling agent DL-411 1-2, carborundum powder 2-3; Preparation method mixes iron powder, aluminium hydroxide, zinc sulfate, medical stone, grind to form 200-300 order powder, then add aluminate coupling agent DL-411 to mix, under 10-15Mpa, be pressed into blank, then, send at 920-950 DEG C and calcine 3-4 hour, cooling after, be ground into 300-400 order powder, mix with other remaining component, be heated to 60-70 DEG C, under 1200-1500 rev/min, stir 1-2 hour, to obtain final product.

2. powder metallurgy high rigidity flange according to claim 1, is characterized in that, is made up of following concrete steps:

(1) chromium, manganese, nickel, iron powder, Cu, Zn, Mg 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 8-11Mpa pressure, is pressed into bulk, then under nitrogen protection atmosphere 600-650 DEG C carry out sintering 8-10 hour, will be after the crushing material after sintering cross 200-400 mesh sieve;

(2) other remaining component is mixed;

(3) at 55-65 DEG C, after mixing and stirring 65-95 minute, pack step (1), (2) material into mould, be pressed into base;

(4) pressed compact is placed in sintering oven, is warming up to sintering 1-2 hour under 350-450 DEG C of condition with 9-12 DEG C/min of speed; Then be warming up to sintering 2-3 hour under 1100-1150 DEG C of condition with 5-7 DEG C/min of speed; In last air, be cooled to room temperature.