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

A molybdenum disulfide and powder metallurgy technology, applied in the field of powder metallurgy, can solve the problems of inferior dimensional accuracy, non-dense parts, and powder metallurgy parts performance inferior to forging, etc., to achieve good fusion, good surface quality, uniform and fine quality. Effect

Inactive Publication Date: 2020-04-17
WUXI HENGTELI METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, part of the performance of powder metallurgy parts is not as good as forging and some casting parts, such as ductility and impact resistance; although the dimensional accuracy of the product is good, it is not as good as the dimensional accuracy of some finished products; the non-dense characteristics of the parts will affect post-processing The influence of treatment, especially in heat treatment, electroplating and other processes must consider the influence of this characteristic

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0019] Step (1): get following raw material respectively by weight percentage: titanium 2%, antimony 3%, silicon 2%, molybdenum disulfide 0.1%, iron powder surplus, the weight percentage sum of each composition is 100%; The raw materials are mixed at high speed until the above-mentioned materials are evenly mixed; the raw materials are ball-milled with a ball mill, the ball-to-material ratio is 55:1, and the ball-milling time is 4.5h; step (2): the powder metallurgy materials after ball milling are pressed into shape, and the Put the powder metallurgy material into the mold, pressurize the mold until the pressure is 625MPa, and press until the density of the above material is 7.8g / m3; Step (3): Sinter the powder metallurgy material after pressing and molding at high temperature. The sintering temperature is divided into two stages, the first stage temperature is 845°C, sintering for 3 hours, and the temperature of the second stage is raised to 940°C, sintering for 3 hours, afte...

Embodiment 2

[0021] Step (1): get following raw material respectively by weight percentage: titanium 4%, antimony 5%, silicon 3%, molybdenum disulfide 1%, iron powder surplus, the weight percentage sum of each composition is 100%; The raw materials are mixed at high speed until the above-mentioned materials are evenly mixed; the raw materials are ball-milled with a ball mill, the ball-to-material ratio is 35:1, and the ball-milling time is 3.5h; step (2): the powder metallurgy materials after ball milling are pressed into shape, and Put the powder metallurgy material into the mold, pressurize the mold until the pressure is 535MPa, and press until the density of the above material is 5.5g / m3; Step (3): Sinter the powder metallurgy material after pressing and molding at high temperature. The sintering temperature is divided into two stages, the first stage temperature is 780°C, sintering for 3 hours, and the temperature of the second stage is raised to 990°C, sintering for 3 hours, after cool...

Embodiment 3

[0023] Step (1): get following raw material respectively by weight percentage: titanium 3%, antimony 4%, silicon 2.5%, molybdenum disulfide 0.4%, iron powder surplus, the weight percentage sum of each composition is 100%; The raw materials are mixed at high speed until the above-mentioned materials are evenly mixed; the raw materials are ball-milled with a ball mill, the ball-to-material ratio is 55:1, and the ball-milling time is 4.5h; step (2): the powder metallurgy materials after ball milling are pressed into shape, and the Put the powder metallurgy material into the mold, pressurize the mold until the pressure is 625MPa, and press until the density of the above material is 7.8g / m3; Step (3): Sinter the powder metallurgy material after pressing and molding at high temperature. The sintering temperature is divided into two stages, the first stage temperature is 845°C, sintering for 3 hours, and the temperature of the second stage is raised to 940°C, sintering for 3 hours, af...

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Abstract

The invention discloses a novel wear-resistant powder metallurgy material containing molybdenum disulfide and a preparation method thereof. The composition of the material comprises the following components in percentage by weight of 2-4% of titanium, 3-5% of antimony, 2-3% of silicon, 0.1-1% of molybdenum disulfide and the balance iron powder. The preparation method of the material comprises thefollowing steps that S1, raw materials are subjected to ball-milling by using a ball mill, the ball material ratio is (35:1) to (55:1), and the ball-milling time is 3.5h to 4.5h; S2, the powder metallurgy material is placed in a mold, the mold is pressurized by 535-625 MPa, and the material is pressed to a density of 5.5-7.8 g / m3; and S3, the press-formed powder metallurgy material is sintered ata high temperature, the temperature of the first stage ranges from 780 DEG C to 845 DEG C, the sintering is performed for 3h, the temperature of the second stage ranges from 940 DEG C to 990 DEG C, the sintering is performed for 3h, and the novel wear-resistant powder metallurgy material containing molybdenum disulfide is obtained after cooling. According to the preparation method, the wear resistance and the corrosion resistance of the powder metallurgy material can be improved.

Description

technical field [0001] 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 technique [0002] Powder metallurgy sintering is carried out below the melting point of the base metal, so most refractory metals and their compounds can only be produced by powder metallurgy at present; the non-compactness of powder metallurgy compression is conducive to controlling product density and porosity Porous materials, containing bearings, anti-friction materials, etc. are prepared at a high rate; the size of powder metallurgy pressed products is infinitely close to the final product size (no machining or small amount of processing is required). The material utilization rate is high, so it can greatly save metal and reduce product costs; powder metallurgy products are produced by pressing the same mold, and the consistency between workpieces i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/02B22F3/10C22C33/02C22C38/02C22C38/12C22C38/14C22C38/60
CPCB22F3/1017B22F3/02C22C38/14C22C38/60C22C38/02C22C38/12C22C33/0264B22F1/105
Inventor 邹勇平吕廷镇
Owner WUXI HENGTELI METAL PROD