CN103600060A - Powder metallurgy metal bearing material and manufacturing method thereof - Google Patents

Abstract

The invention discloses a powder metallurgy metal bearing material. The powder metallurgy metal bearing material is characterized by being manufactured by, by weight, iron powder 74-78 parts, copper 2.4-2.8 parts, tin 1.2-1.4 parts, nickel 7.6-7.8 parts, Mn 3.4-3.7 parts, Zn 2.1-2.5 parts, Ti 11.3-12.2 parts, Sb 1.2-1.3 parts, Zr 0.35-0.45 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 powder metallurgy alloy composite material has few pores and is excellent in structural rigidity, hardness, fatigue resistance performance and tensile strength performance and does not contain lead, the environmental pollution influence is small, production steps are simple, and the production efficiency is improved.

Description

A kind of powder metallurgy metal bearing material and preparation method thereof

Technical field

The present invention relates to field of powder metallurgy, particularly a kind of powder metallurgy metal bearing material 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.

Product purpose of the present invention is to take mild steel steel plate as matrix, surperficial loose sintering copper alloy powder, copper alloy-bimetal copper-steel lubriation material of forming through fine and close rolling, mainly for the manufacture of automobile bearing, side plate, thrust plate etc.

Conventional sintering manufactured copper-bimetal copper-steel lubriation material copper alloy powder, as the Pot metal powder of the trades mark such as CuPb10Sn10, CuPb24Sn, CuPb24Sn4, all contains the lead of vast scale.Because of lead and compound harmful, in July, 2006, European Union implemented RoHS instruction, required electronics and the electrical equipment put goods on the market must not contain the harmful substances such as plumbous.For a long time, the secondary pollution problem after discarded due to the pollution of lead producing, in electroplating process and bearing shell, has caused huge harm to environment, and this problem more and more causes the concern of home and abroad sliding bearing industry.The cry of China exploitation leadless copper base self-lubricating material grows to even greater heights, and finds a kind of unleaded new material and substitutes traditional material and become inexorable trend.

Summary of the invention

The object of this invention is to provide a kind of powder metallurgy metal bearing material and preparation method thereof.

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

A powder metallurgy metal bearing material, is made by the raw material of following weight portion: iron powder 74-78, copper 2.4-2.8, tin 1.2-1.4, nickel 7.6-7.8, Mn 3.4-3.7, Zn 2.1-2.5, Ti 11.3-12.2, Sb 1.2-1.3, Zr 0.35-0.45, 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.

Powder metallurgy metal bearing material of the present invention, by following concrete steps, made:

(1) iron powder, copper, tin, nickel, Mn, Zn, Ti, Sb, Zr 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) at 62-66 ℃, after mixing and stirring 70-90 minute, pack material into mould, be pressed into base;

(3) 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 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; Seldom, the rigidity of structure, hardness, fatigue performance, the good the present invention of tensile strength properties are not leaded for hole of the present invention, and environmental pollution is little, and production stage is simple, has improved production efficiency.

Specific embodiments

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

A powder metallurgy metal bearing material, by following weight portion (kilogram) raw material make: iron powder 74, copper 2.4, tin 1.2, nickel 7.6, Mn 3.4, Zn 2.1, Ti 11.3, Sb 1.2, Zr 0.35, 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.

Powder metallurgy metal bearing material of the present invention, by following concrete steps, made:

(1) iron powder, copper, tin, nickel, Mn, Zn, Ti, Sb, Zr 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) at 62-66 ℃, after mixing and stirring 70-90 minute, pack material into mould, be pressed into base;

(3) 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: HRC57; Tensile strength: 1075MPa.

Claims (2)

1. a powder metallurgy metal bearing material, it is characterized in that, by the raw material of following weight portion, made: iron powder 74-78, copper 2.4-2.8, tin 1.2-1.4, nickel 7.6-7.8, Mn 3.4-3.7, Zn 2.1-2.5, Ti 11.3-12.2, Sb 1.2-1.3, Zr 0.35-0.45, 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. powder metallurgy metal bearing material according to claim 1, is characterized in that, by following concrete steps, is made:

(1) iron powder, copper, tin, nickel, Mn, Zn, Ti, Sb, Zr 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) at 62-66 ℃, after mixing and stirring 70-90 minute, pack material into mould, be pressed into base;

(3) 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.