CN111014648A - Novel wear-resistant powder metallurgy material containing molybdenum disulfide and preparation method thereof - Google Patents

Novel wear-resistant powder metallurgy material containing molybdenum disulfide and preparation method thereof Download PDF

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Publication number
CN111014648A
CN111014648A CN201811179943.XA CN201811179943A CN111014648A CN 111014648 A CN111014648 A CN 111014648A CN 201811179943 A CN201811179943 A CN 201811179943A CN 111014648 A CN111014648 A CN 111014648A
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powder metallurgy
molybdenum disulfide
metallurgy material
novel wear
material containing
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CN201811179943.XA
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Chinese (zh)
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邹勇平
吕廷镇
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Wuxi Hengteli Metal Products Co ltd
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Wuxi Hengteli Metal Products Co ltd
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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
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional 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
    • 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
    • B22F1/105—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing inorganic lubricating or binding agents, e.g. metal salts
    • 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
    • B22F3/02—Compacting only
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention discloses a novel wear-resistant powder metallurgy material containing molybdenum disulfide and a preparation method thereof, wherein the novel wear-resistant powder metallurgy material comprises the following components in percentage by weight: 2-4% of titanium, 3-5% of antimony, 2-3% of silicon, 0.1-1% of molybdenum disulfide and the balance of iron powder, wherein the preparation method comprises the following steps: (1): 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; (2): putting the powder metallurgy material into a mold, pressurizing the mold 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 after compression molding at 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 novel wear-resistant powder metallurgy material containing molybdenum disulfide is obtained after cooling.

Description

Novel wear-resistant powder metallurgy material containing molybdenum disulfide and preparation method thereof
Technical Field
The invention relates to the field of powder metallurgy, in particular to a novel wear-resistant powder metallurgy material containing molybdenum disulfide 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, there is a need to develop a new wear-resistant powder metallurgy material containing molybdenum disulfide 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 products and a preparation method thereof.
In order to achieve the above object, the technical solution of the present invention is a novel wear-resistant powder metallurgy material containing molybdenum disulfide, which comprises the following components by weight: 2-4% of titanium, 3-5% of antimony, 2-3% of silicon, 0.1-1% of molybdenum disulfide and the balance of iron powder, wherein the sum of the weight percentages of the components is 100%.
Preferably, the novel wear-resistant powder metallurgy material containing molybdenum disulfide comprises the following components in percentage by weight: 3 percent of titanium, 4 percent of stibium, 2.5 percent of silicon, 0.4 percent of molybdenum disulfide and the balance of iron powder, wherein the sum of the weight percentages of the components is 100 percent.
Another object of the present invention is to provide a method for preparing a novel wear-resistant powder metallurgy material containing molybdenum disulfide, which comprises the following steps:
step (1): the following raw materials are respectively taken according to the weight percentage: 2-4% of titanium, 3-5% of antimony, 2-3% of silicon, 0.1-1% of molybdenum disulfide 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 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 ℃, sintering is performed for 3 hours, the temperature of the second stage is increased to 940-990 ℃, sintering is performed for 3 hours, and the novel wear-resistant powder metallurgy material containing molybdenum disulfide is obtained after cooling.
Preferably, in the preparation method of the novel wear-resistant powder metallurgy material containing molybdenum disulfide, the die is pressurized until the pressure is 580 MPa.
Preferably, the novel wear-resistant powder metallurgy material containing molybdenum disulfide is prepared by a method of pressing the novel wear-resistant powder metallurgy material containing molybdenum disulfide until the density of the material is 6.4g/m 3.
Preferably, the temperature of the first stage in the preparation method of the novel wear-resistant powder metallurgy material containing molybdenum disulfide is 810 ℃.
Preferably, the temperature of the second stage in the preparation method of the novel wear-resistant powder metallurgy material containing molybdenum disulfide is 960 ℃.
The invention has the advantages and beneficial effects that: the powder metallurgy material provided by the invention is prepared from various metal raw materials, molybdenum disulfide, a lubricant and other additives according to a specific ratio, and has good fusion property. The blank prepared by the powder metallurgy material is easy to demould, and has good surface quality and uniform and fine quality.
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 the weight percentage: 2% of titanium, 3% of antimony, 2% of silicon, 0.1% of molybdenum disulfide and the balance of iron powder, wherein the sum of the weight percentages of the components is 100%; 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 novel wear-resistant powder metallurgy material containing the molybdenum disulfide is obtained after cooling.
Example 2
Step (1): the following raw materials are respectively taken according to the weight percentage: 4% of titanium, 5% of antimony, 3% of silicon, 1% of molybdenum disulfide and the balance of iron powder, wherein the sum of the weight percentages of the components is 100%; 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 990 ℃, the sintering time is 3 hours, and the novel wear-resistant powder metallurgy material containing molybdenum disulfide is obtained after cooling.
Example 3
Step (1): the following raw materials are respectively taken according to the weight percentage: 3% of titanium, 4% of antimony, 2.5% of silicon, 0.4% of molybdenum disulfide and the balance of iron powder, wherein the sum of the weight percentages of the components is 100%; 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 novel wear-resistant powder metallurgy material containing the molybdenum disulfide is obtained after cooling.
Comparative example
Step (1): the following raw materials are respectively taken according to the weight percentage: 0.08 percent of boron stearate, 0.6 percent of graphite powder, 1.8 percent of boron-copper alloy powder and the balance of iron powder, wherein the sum of the weight percentages of the components is 100 percent; 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 novel wear-resistant powder metallurgy material containing the molybdenum disulfide is obtained after cooling.
The tensile strength and the compressive strength of the novel wear-resistant powder metallurgy material containing molybdenum disulfide are as follows:
Figure DEST_PATH_IMAGE002
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 (7)

1. The novel wear-resistant powder metallurgy material containing molybdenum disulfide is characterized by comprising the following components in percentage by weight: 2-4% of titanium, 3-5% of antimony, 2-3% of silicon, 0.1-1% of molybdenum disulfide and the balance of iron powder, wherein the sum of the weight percentages of the components is 100%.
2. The novel wear-resistant powder metallurgy material containing molybdenum disulfide according to claim 1, wherein the composition of the novel wear-resistant powder metallurgy material containing molybdenum disulfide comprises, in weight percent: 3 percent of titanium, 4 percent of stibium, 2.5 percent of silicon, 0.4 percent of molybdenum disulfide and the balance of iron powder, wherein the sum of the weight percentages of the components is 100 percent.
3. A preparation method of a novel wear-resistant powder metallurgy material containing molybdenum disulfide is characterized by comprising the following steps:
step (1): the following raw materials are respectively taken according to the weight percentage: 0.08-2% of zinc borate, 0.3-0.6% of graphite powder, 1.8-3.2% of boron-copper alloy powder, 0.1-1% of molybdenum disulfide 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 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 ℃, sintering is performed for 3 hours, the temperature of the second stage is increased to 940-990 ℃, sintering is performed for 3 hours, and the novel wear-resistant powder metallurgy material containing molybdenum disulfide is obtained after cooling.
4. The method as claimed in claim 3, wherein the die is pressurized to 580 MPa.
5. The process for preparing the novel wear-resistant powder metallurgy material containing molybdenum disulfide as claimed in claim 3, wherein the novel wear-resistant powder metallurgy material containing molybdenum disulfide is prepared by pressing the novel wear-resistant powder metallurgy material until the density of the material is 6.4g/m 3.
6. The method as claimed in claim 3, wherein the temperature of the first stage of the method is 810 ℃.
7. The method as claimed in claim 3, wherein the temperature of the second stage of the method is 960 ℃.
CN201811179943.XA 2018-10-10 2018-10-10 Novel wear-resistant powder metallurgy material containing molybdenum disulfide and preparation method thereof Pending CN111014648A (en)

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