Powder metallurgy circular spline and preparation method thereof

A powder metallurgy steel and iron-based powder metallurgy technology, applied in the field of powder metallurgy steel wheel and its preparation, can solve the problems of insufficient guarantee of powder composition uniformity, no production process data indicators, deformation and performance fluctuation, etc. The effect of good friction reduction, low cost and uniform composition

Active Publication Date: 2019-06-11
GRIPM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The currently published patent CN201711059299 only proposes the use of powder metallurgy technology and materials for the preparation of steel wheel blanks, without specific production process data indicators, and is not operable
[0004] At the same time, the conventional powder mixing technology is not enough to ensure the uniformity of the powder components after mixing. For small modulus gear parts, the deformation and performance will fluctuate greatly after pressing and sintering, so that the steel wheels made of powder metallurgy materials are more complex than conventional alloy steel or cast iron. Material, the advantage is no longer obvious

Method used

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  • Powder metallurgy circular spline and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the powder composition formula of FLC4805, FeNiMoCu atomized powder and graphite powder are mixed according to 98.3:0.7 (mass percentage), and 1% binder solution (the ratio of binder to acetone is 1:10) is added for bonding , bonded for 30 minutes, then dried the powder, then added 0.8% lubricant for mixing, the mixing time was 15 minutes, and then pressed, the green density was 7.0g / cm 3 , and then sintered at 1120°C for 30 minutes. The atmosphere is a decomposed ammonia atmosphere. After the parts are released from the furnace, they are immersed in lubricating oil at high temperature in vacuum, and then shaped to make the size meet the requirements of the drawing. Then, the surface is steamed. The steam treatment temperature is 560°C and the time is 1 hour.

Embodiment 2

[0025] According to the ratio of alloying elements except graphite in the FLC2-4808 powder composition, FeNiMoCu atomized powder is prepared, and the graphite powder is proportioned according to 97.0:3.0 (mass percentage), and 3% binder solution (binding agent and acetone) is added The ratio is 1:10) for bonding, bonding for 30 minutes, then drying the powder, adding 0.8% lubricant for mixing, mixing time for 15 minutes, and then pressing, green density 6.95g / cm 3 , and then sintered at 1120°C for 30 minutes, and the atmosphere was vacuum. After being released from the furnace, the parts are immersed in lubricating oil in vacuum and high temperature, and then shaped to make the size meet the requirements of the drawing, and then low-temperature nitriding treatment is carried out.

Embodiment 3

[0027] Fe powder, Ni powder, Cu powder, and graphite powder are mixed according to 95.2:2.0:2.0:0.8 (mass percentage), and 1% binder solution is added (the ratio of binder to acetone is 1:10) Bonding, bonding for 30 minutes, then drying the powder, adding 0.8% lubricant for mixing, mixing time for 15 minutes, and then pressing, green density 7.0g / cm 3 , and then sintered at 1120°C for 30 minutes, the atmosphere is hydrogen atmosphere, after the parts are out of the furnace, they are immersed in lubricating oil at high temperature in vacuum, and then shaped to make the size meet the requirements of the drawing, and then the surface is steamed. The steam treatment temperature is 560°C and the time is 1 Hour.

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Abstract

The invention discloses a powder metallurgy circular spline which adopts less machining/free-of-machining, can be self-lubricated in the working process and is used for a harmonic reducer, and a preparation method of the powder metallurgy circular spline. The preparation method adopts a powder metallurgy method and comprises the procedures of preparation of powder with high composition uniformity,pressing, sintering, aftertreatment and the like. The powder metallurgy circular spline prepared from the preparation method has the advantages of being uniform in composition, good in abrasion resistance and anti-friction property, low in noise, long in life, less in machining/free of machining, low in cost and the like, and can replace a circular spline currently machined and prepared from materials such as steel and cast iron.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a powder metal diamond wheel used for a harmonic reducer and a preparation method thereof. Background technique [0002] The harmonic gear reducer is composed of a fixed internally toothed rigid wheel, a flexible wheel, and a wave generator that causes radial deformation of the flexible wheel. Compared with ordinary reducers, it has the advantages of simple structure, small size, light weight, large transmission ratio range, high positioning and repeat positioning accuracy, good coaxiality, and can transmit motion and power to confined spaces. It is widely used in electronic , aerospace, robotics, chemical and other industries. Due to the long-term deformation contact friction between the rigid wheel and the flexible wheel, and the flexible wheel and the wave generator, the parts are worn, which causes the positioning and repeat positioning accuracy to dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C38/08C22C38/12C22C38/18C22C38/04C22C38/02C22C38/20C22C38/22C22C38/42C22C38/44C22C38/40B22F3/16B22F5/08F16H55/17F16H55/06
Inventor 张少明王林山石韬汪礼敏胡强付东兴王永慧
Owner GRIPM ADVANCED MATERIALS CO LTD
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