CN111069583A - Compression-resistant wear-resistant powder metallurgy gear material and preparation method thereof - Google Patents
Compression-resistant wear-resistant powder metallurgy gear material and preparation method thereof Download PDFInfo
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- CN111069583A CN111069583A CN201811215293.XA CN201811215293A CN111069583A CN 111069583 A CN111069583 A CN 111069583A CN 201811215293 A CN201811215293 A CN 201811215293A CN 111069583 A CN111069583 A CN 111069583A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/102—Metallic powder coated with organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The invention discloses a compression-resistant wear-resistant powder metallurgy gear material and a preparation method thereof, wherein the compression-resistant wear-resistant powder metallurgy gear material is prepared from the following components in parts by weight: 11-23 parts of ceramic powder, 5-13 parts of zinc stearate, 8-19 parts of graphite, 22-37 parts of iron powder, 15-22 parts of polyvinyl isobutyl ether, 19-26 parts of titanium powder, 7-15 parts of carbon powder and 12-16 parts of diamond powder, and the preparation method comprises the following steps: (1) ball milling is carried out on the raw materials, the ball-material ratio is 35: 1-55: 1, and the ball milling time is 3.5-4.5 h; (2) putting the material into a mold, pressurizing to 535-625 MPa, and pressing to obtain 3 with the density of 5.5-7.8 g/m; (3) and sintering the powder metallurgy material subjected to compression molding at a high temperature, wherein the temperature of the first stage is 780-845 ℃, the sintering time is 3 hours, the temperature of the second stage is 940-990 ℃, the sintering time is 3 hours, and the compression-resistant wear-resistant powder metallurgy gear material is obtained after cooling.
Description
Technical Field
The invention relates to the field of powder metallurgy, in particular to a compression-resistant wear-resistant powder metallurgy gear material and a preparation method thereof.
Background
Powder metallurgy sintering is performed below the melting point of the base metal, so that most refractory metals and their compounds can be manufactured only by powder metallurgy at present; the incompactness of powder metallurgy pressing is beneficial to preparing porous materials, bearings, antifriction materials and the like by controlling the density and porosity of products; the size of powder metallurgy compacted products is infinitely close to the final finished product size (no machining or little machining is required). The material utilization rate is high, so that metal can be greatly saved, and the product cost is reduced; the powder metallurgy products are produced by pressing the same die, the consistency among the workpieces is good, and the powder metallurgy products are suitable for the production of large-batch parts, in particular to products with high processing cost such as gears and the like; powder metallurgy can ensure the correctness and uniformity of materials through the proportion of components, and moreover, sintering is generally carried out in vacuum or reducing atmosphere, so that the materials are not polluted or oxidized, and high-purity materials can be prepared.
But some of the powder metallurgy parts have inferior properties to forged and some cast parts, such as ductility and impact resistance; the dimensional accuracy of the product is good, but is not as good as that obtained by some finished products; the non-compact nature of the part can have an impact on the post-processing treatment, which must be taken into account especially in heat treatment, electroplating and the like.
Therefore, it is necessary to develop a pressure-resistant and wear-resistant powder metallurgy gear material and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a powder metallurgy material which has the advantages of wear resistance, high tensile strength and impact energy, low cost and capability of manufacturing high-strength and wear-resistant gears and a preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is that the pressure-resistant and wear-resistant powder metallurgy gear material is prepared from the following components in parts by weight: 11-23 parts of ceramic powder, 5-13 parts of zinc stearate, 8-19 parts of graphite, 22-37 parts of iron powder, 15-22 parts of polyvinyl isobutyl ether, 19-26 parts of titanium powder, 7-15 parts of carbon powder and 12-16 parts of diamond powder.
Preferably, the compression-resistant and wear-resistant powder metallurgy gear material is prepared from the following components in parts by weight: 15-19 parts of ceramic powder, 7-11 parts of zinc stearate, 11-16 parts of graphite, 28-32 parts of iron powder, 16-19 parts of polyvinyl isobutyl ether, 21-23 parts of titanium powder, 9-12 parts of carbon powder and 13-15 parts of diamond powder.
Preferably, the compression-resistant and wear-resistant powder metallurgy gear material is prepared from the following components in parts by weight: 17 parts of ceramic powder, 9 parts of zinc stearate, 15 parts of graphite, 30 parts of iron powder, 17 parts of polyvinyl isobutyl ether, 22 parts of titanium powder, 10 parts of carbon powder and 14 parts of diamond powder.
The invention also aims to provide a preparation method of the pressure-resistant and wear-resistant powder metallurgy gear material, which comprises the following steps:
step (1): the following raw materials are respectively taken according to parts by weight: 11-23 parts of ceramic powder, 5-13 parts of zinc stearate, 8-19 parts of graphite, 22-37 parts of iron powder, 15-22 parts of polyvinyl isobutyl ether, 19-26 parts of titanium powder, 7-15 parts of carbon powder and 12-16 parts of diamond powder; mixing the raw materials at a high speed until the materials are uniform; ball-milling the raw materials by using a ball mill, wherein the ball-material ratio is 35: 1-55: 1, and the ball-milling time is 3.5-4.5 h;
step (2): performing compression molding on the powder metallurgy material subjected to ball milling, putting the powder metallurgy material into a mold, pressurizing the mold until the pressure is 535-625 MPa, and pressing until the density of the material is 5.5-7.8 g/m 3;
and (3): and (3) performing high-temperature sintering on the powder metallurgy material after the compression molding, wherein the high-temperature sintering temperature is divided into two stages, the temperature of the first stage is 780-845 ℃, the sintering time is 3 hours, the temperature of the second stage is increased to 940-990 ℃, the sintering time is 3 hours, and the compression-resistant and wear-resistant powder metallurgy gear material is obtained after cooling.
Preferably, in the preparation method of the pressure-resistant and wear-resistant powder metallurgy gear material, the die is pressurized until the pressure is 580 MPa.
Preferably, the compression-resistant and wear-resistant powder metallurgy gear material is prepared by compressing the material to the density of 6.4g/m 3.
Preferably, the temperature of the first stage in the preparation method of the pressure-resistant and wear-resistant powder metallurgy gear material is 810 ℃.
Preferably, the temperature of the second stage in the preparation method of the pressure-resistant and wear-resistant powder metallurgy gear material is 960 ℃.
The invention has the advantages and beneficial effects that: the compressive strength of the prepared powder metallurgy gear material is higher than that of the conventional powder metallurgy gear material, the wear-resisting strength of the gear is improved, and the performance of the powder metallurgy gear material is enhanced.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
Step (1): the following raw materials are respectively taken according to parts by weight: 11 parts of ceramic powder, 5 parts of zinc stearate, 8 parts of graphite, 22 parts of iron powder, 15 parts of polyvinyl isobutyl ether, 19 parts of titanium powder, 7 parts of carbon powder and 12 parts of diamond powder; mixing the raw materials at a high speed until the materials are uniform; ball-milling the raw materials by using a ball mill, wherein the ball-material ratio is 55:1, and the ball-milling time is 4.5 h; step (2): performing compression molding on the powder metallurgy material subjected to ball milling, putting the powder metallurgy material into a die, pressurizing the die until the pressure is 625MPa, and pressing until the density of the material is 7.8g/m 3; and (3): and (3) performing high-temperature sintering on the powder metallurgy material after the compression molding, wherein the high-temperature sintering temperature is divided into two stages, the temperature of the first stage is 845 ℃, the sintering time is 3 hours, the temperature of the second stage is 940 ℃, the sintering time is 3 hours, and the compression-resistant and wear-resistant powder metallurgy gear material is obtained after cooling.
Example 2
Step (1): the following raw materials are respectively taken according to parts by weight: 23 parts of ceramic powder, 13 parts of zinc stearate, 19 parts of graphite, 37 parts of iron powder, 22 parts of polyvinyl isobutyl ether, 26 parts of titanium powder, 15 parts of carbon powder and 16 parts of diamond powder; mixing the raw materials at a high speed until the materials are uniform; ball-milling the raw materials by using a ball mill, wherein the ball-material ratio is 35:1, and the ball-milling time is 3.5 h; step (2): performing compression molding on the powder metallurgy material subjected to ball milling, putting the powder metallurgy material into a die, pressurizing the die until the pressure is 535MPa, and pressing until the density of the material is 5.5g/m 3; and (3): and (3) performing high-temperature sintering on the powder metallurgy material after the compression molding, wherein the high-temperature sintering temperature is divided into two stages, the temperature of the first stage is 780 ℃, the sintering time is 3 hours, the temperature of the second stage is increased to 990 ℃, the sintering time is 3 hours, and the compression-resistant and wear-resistant powder metallurgy gear material is obtained after cooling.
Example 3
Step (1): the following raw materials are respectively taken according to parts by weight: 15 parts of ceramic powder, 7 parts of zinc stearate, 11 parts of graphite, 28 parts of iron powder, 16 parts of polyvinyl isobutyl ether, 21 parts of titanium powder, 9 parts of carbon powder and 13 parts of diamond powder; mixing the raw materials at a high speed until the materials are uniform; ball-milling the raw materials by using a ball mill, wherein the ball-material ratio is 55:1, and the ball-milling time is 4.5 h; step (2): performing compression molding on the powder metallurgy material subjected to ball milling, putting the powder metallurgy material into a die, pressurizing the die until the pressure is 625MPa, and pressing until the density of the material is 7.8g/m 3; and (3): and (3) performing high-temperature sintering on the powder metallurgy material after the compression molding, wherein the high-temperature sintering temperature is divided into two stages, the temperature of the first stage is 845 ℃, the sintering time is 3 hours, the temperature of the second stage is 940 ℃, the sintering time is 3 hours, and the compression-resistant and wear-resistant powder metallurgy gear material is obtained after cooling.
Example 4
Step (1): the following raw materials are respectively taken according to parts by weight: 19 parts of ceramic powder, 11 parts of zinc stearate, 16 parts of graphite, 32 parts of iron powder, 19 parts of polyvinyl isobutyl ether, 23 parts of titanium powder, 12 parts of carbon powder and 15 parts of diamond powder; mixing the raw materials at a high speed until the materials are uniform; ball-milling the raw materials by using a ball mill, wherein the ball-material ratio is 35:1, and the ball-milling time is 3.5 h; step (2): performing compression molding on the powder metallurgy material subjected to ball milling, putting the powder metallurgy material into a die, pressurizing the die until the pressure is 535MPa, and pressing until the density of the material is 5.5g/m 3; and (3): and (3) performing high-temperature sintering on the powder metallurgy material after the compression molding, wherein the high-temperature sintering temperature is divided into two stages, the temperature of the first stage is 780 ℃, the sintering time is 3 hours, the temperature of the second stage is increased to 990 ℃, the sintering time is 3 hours, and the compression-resistant and wear-resistant powder metallurgy gear material is obtained after cooling.
Example 5
Step (1): the following raw materials are respectively taken according to parts by weight: 17 parts of ceramic powder, 9 parts of zinc stearate, 15 parts of graphite, 30 parts of iron powder, 17 parts of polyvinyl isobutyl ether, 22 parts of titanium powder, 10 parts of carbon powder and 14 parts of diamond powder; mixing the raw materials at a high speed until the materials are uniform; ball-milling the raw materials by using a ball mill, wherein the ball-material ratio is 45:1, and the ball-milling time is 4 h; step (2): performing compression molding on the powder metallurgy material subjected to ball milling, putting the powder metallurgy material into a die, pressurizing the die until the pressure is 580MPa, and pressing until the density of the material is 6.4g/m 3; and (3): and (3) sintering the powder metallurgy material subjected to compression molding at high temperature, wherein the high-temperature sintering temperature is divided into two stages, the temperature of the first stage is 810 ℃, the sintering time is 3 hours, the temperature of the second stage is increased to 960 ℃, the sintering time is 3 hours, and the compression-resistant and wear-resistant powder metallurgy gear material is obtained after cooling.
Comparative example
Step (1): the following raw materials are respectively taken according to parts by weight: 8 parts of boron stearate, 9 parts of graphite, 10 parts of boron-copper alloy powder and the balance of iron powder; mixing the raw materials at a high speed until the materials are uniform; ball-milling the raw materials by using a ball mill, wherein the ball-material ratio is 55:1, and the ball-milling time is 4.5 h; step (2): performing compression molding on the powder metallurgy material subjected to ball milling, putting the powder metallurgy material into a die, pressurizing the die until the pressure is 625MPa, and pressing until the density of the material is 7.8g/m 3; and (3): and (3) performing high-temperature sintering on the powder metallurgy material after the compression molding, wherein the high-temperature sintering temperature is divided into two stages, the temperature of the first stage is 845 ℃, the sintering time is 3 hours, the temperature of the second stage is 940 ℃, the sintering time is 3 hours, and the compression-resistant and wear-resistant powder metallurgy gear material is obtained after cooling.
The tensile strength and the compressive strength of the compressive and wear-resistant powder metallurgy gear material are as follows:
while the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit of the invention, and the scope of the appended claims is to be accorded the full range of equivalents.
Claims (8)
1. The pressure-resistant and wear-resistant powder metallurgy gear material is characterized by being prepared from the following components in parts by weight: 11-23 parts of ceramic powder, 5-13 parts of zinc stearate, 8-19 parts of graphite, 22-37 parts of iron powder, 15-22 parts of polyvinyl isobutyl ether, 19-26 parts of titanium powder, 7-15 parts of carbon powder and 12-16 parts of diamond powder.
2. The pressure-resistant and wear-resistant powder metallurgy gear material according to claim 1, wherein the pressure-resistant and wear-resistant powder metallurgy gear material is prepared from the following components in parts by weight: 15-19 parts of ceramic powder, 7-11 parts of zinc stearate, 11-16 parts of graphite, 28-32 parts of iron powder, 16-19 parts of polyvinyl isobutyl ether, 21-23 parts of titanium powder, 9-12 parts of carbon powder and 13-15 parts of diamond powder.
3. The pressure-resistant and wear-resistant powder metallurgy gear material according to claim 1, wherein the pressure-resistant and wear-resistant powder metallurgy gear material is prepared from the following components in parts by weight: 17 parts of ceramic powder, 9 parts of zinc stearate, 15 parts of graphite, 30 parts of iron powder, 17 parts of polyvinyl isobutyl ether, 22 parts of titanium powder, 10 parts of carbon powder and 14 parts of diamond powder.
4. The preparation method of the pressure-resistant and wear-resistant powder metallurgy gear material is characterized by comprising the following steps of:
step (1): the following raw materials are respectively taken according to parts by weight: 11-23 parts of ceramic powder, 5-13 parts of zinc stearate, 8-19 parts of graphite, 22-37 parts of iron powder, 15-22 parts of polyvinyl isobutyl ether, 19-26 parts of titanium powder, 7-15 parts of carbon powder and 12-16 parts of diamond powder; mixing the raw materials at a high speed until the materials are uniform; ball-milling the raw materials by using a ball mill, wherein the ball-material ratio is 35: 1-55: 1, and the ball-milling time is 3.5-4.5 h;
step (2): performing compression molding on the powder metallurgy material subjected to ball milling, putting the powder metallurgy material into a mold, pressurizing the mold until the pressure is 535-625 MPa, and pressing until the density of the material is 5.5-7.8 g/m 3;
and (3): and (3) performing high-temperature sintering on the powder metallurgy material after the compression molding, wherein the high-temperature sintering temperature is divided into two stages, the temperature of the first stage is 780-845 ℃, the sintering time is 3 hours, the temperature of the second stage is increased to 940-990 ℃, the sintering time is 3 hours, and the compression-resistant and wear-resistant powder metallurgy gear material is obtained after cooling.
5. The method for preparing the powder metallurgy gear material with the compression resistance and the wear resistance as claimed in claim 4, wherein the die is pressurized to 580MPa in the method for preparing the powder metallurgy gear material with the compression resistance and the wear resistance.
6. The method for preparing the powder metallurgy gear material with the compression resistance and the wear resistance as claimed in claim 4, wherein the density of the material is 6.4g/m3 after being compressed in the method for preparing the powder metallurgy gear material with the compression resistance and the wear resistance.
7. The method for preparing the pressure-resistant and wear-resistant powder metallurgy gear material according to claim 4, wherein the temperature of the first stage in the method for preparing the pressure-resistant and wear-resistant powder metallurgy gear material is 810 ℃.
8. The method for preparing the powder metallurgy gear material with the compression resistance and the wear resistance as claimed in claim 4, wherein the temperature of the second stage in the method for preparing the powder metallurgy gear material with the compression resistance and the wear resistance is 960 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215293.XA CN111069583A (en) | 2018-10-18 | 2018-10-18 | Compression-resistant wear-resistant powder metallurgy gear material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811215293.XA CN111069583A (en) | 2018-10-18 | 2018-10-18 | Compression-resistant wear-resistant powder metallurgy gear material and preparation method thereof |
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| CN111069583A true CN111069583A (en) | 2020-04-28 |
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| CN201811215293.XA Pending CN111069583A (en) | 2018-10-18 | 2018-10-18 | Compression-resistant wear-resistant powder metallurgy gear material and preparation method thereof |
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Application publication date: 20200428 |