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Powder metallurgy synchronizer hub and preparation method thereof

A technology of powder metallurgy and synchronizer, which is applied in the field of powder metallurgy to achieve the effects of excellent compressive strength and fracture toughness, high compactness and excellent wear resistance

Inactive Publication Date: 2015-12-16
SUZHOU NETABHAPE COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Powder metallurgy has unique chemical composition and mechanical and physical properties, which cannot be obtained by traditional casting methods

Method used

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  • Powder metallurgy synchronizer hub and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A powder metallurgy synchronizer hub prepared from the following components in parts by mass:

[0024] 80 parts of iron powder, 1 part of platinum powder, 5 parts of graphite powder, 5 parts of metal chromium powder, 4 parts of nano-titanium oxide, 5 parts of metal zinc powder, 3 parts of lanthanum trichloride, 5 parts of manganese dioxide, and 5 parts of cobalt powder , 3 parts of molybdenum thiophosphate and 5 parts of chlorinated paraffin.

[0025] A method for preparing a powder metallurgy synchronizer hub, the preparation steps are as follows:

[0026] (1) Put all the components into the ball mill one by one, carry out ball milling and mixing, and take out after mixing evenly;

[0027] (2) Put the uniformly mixed powder in step (1) into a mold for compression molding, the molding pressure is 280MPa, and take out after molding to obtain a blank;

[0028] (3) Carry out high-temperature calcination of the blank obtained in step (2) in an argon atmosphere at a temper...

Embodiment 2

[0033] A powder metallurgy synchronizer hub prepared from the following components in parts by mass:

[0034] 110 parts of iron powder, 3 parts of platinum powder, 10 parts of graphite powder, 12 parts of metal chromium powder, 9 parts of nano-titanium oxide, 10 parts of metal zinc powder, 6 parts of lanthanum trichloride, 10 parts of manganese dioxide, and 10 parts of cobalt powder , 8 parts of molybdenum thiophosphate and 12 parts of chlorinated paraffin.

[0035] A method for preparing a powder metallurgy synchronizer hub, the preparation steps are as follows:

[0036] (1) Put all the components into the ball mill one by one, carry out ball milling and mixing, and take out after mixing evenly;

[0037] (2) Put the uniformly mixed powder in step (1) into a mold for compression molding, the molding pressure is 350MPa, and take it out after compression molding to obtain a blank;

[0038] (3) Carry out high-temperature calcination of the blank obtained in step (2) under an ar...

Embodiment 3

[0043] A powder metallurgy synchronizer hub prepared from the following components in parts by mass:

[0044] 95 parts of iron powder, 1 part of platinum powder, 6 parts of graphite powder, 7 parts of metal chromium powder, 5 parts of nano-titanium oxide, 6 parts of metal zinc powder, 4 parts of lanthanum trichloride, 7 parts of manganese dioxide, 6 parts of cobalt powder , 4 parts of molybdenum thiophosphate and 7 parts of chlorinated paraffin.

[0045] A method for preparing a powder metallurgy synchronizer hub, the preparation steps are as follows:

[0046] (1) Put all the components into the ball mill one by one, carry out ball milling and mixing, and take out after mixing evenly;

[0047] (2) Put the uniformly mixed powder in step (1) into a mold for molding, the molding pressure is 325MPa, and take out after molding to obtain a blank;

[0048] (3) Carry out high-temperature calcination of the blank obtained in step (2) in an argon atmosphere at a temperature of 1450°C,...

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Abstract

The invention discloses a powder metallurgy synchronizer hub and a preparation method thereof, and relates to the technical field of powder metallurgy. The synchronizer hub is prepared from the following components in parts by mass: 80-110 parts of iron powder, 1-3 parts of platinum powder, 5-10 parts of graphite powder, 5-12 parts of metal chromium powder, 4-9 parts of nano titanium oxide, 5-10 parts of metal zinc powder, 3-6 parts of lanthanum chloride, 5-10 parts of manganese dioxide, 5-10 parts of cobalt powder, 3-8 parts of molybdenum phosphorothioate and 5-12 parts of chlorinated paraffin. The preparation method for the powder metallurgy synchronizer hub comprises the following steps: mixing, carrying out mould pressing, carrying out high-temperature roasting, carrying out steam treatment, carrying out oil immersion treatment and carrying out reshaping treatment. The synchronizer hub provided by the invention has relatively high compactness, relatively excellent tensile strength and breaking tenacity, and excellent wear resistance, and is a very ideal synchronizer hub.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, in particular to a powder metallurgy synchronizer hub and a preparation method thereof. Background technique [0002] In the process of shifting gears while the car is running, since the input shaft and output shaft of the transmission rotate at their own speeds, there is a "synchronization" problem when changing gears. Two gears with different rotation speeds are forcibly meshed, and impact collisions will inevitably occur, which will damage the gears. Therefore, the shifting of the old-style transmission should adopt the "two-leg clutch" method, and the upshift should stay in the neutral position for a while, and the downshift should be fueled in the neutral position to reduce the speed difference of the gears. But this operation is more complicated and difficult to master accurately. Therefore, the designer created a "synchronizer", through which the gears to be meshed can reach a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F5/00
Inventor 刘莉王爽邱晶刘晓东黄明明
Owner SUZHOU NETABHAPE COMPOSITE MATERIALS