Preparation method of iron-based powder metallurgy friction wheel

An iron-based powder metallurgy and friction wheel technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of large material loss, low production efficiency, and many processes, so as to improve production efficiency, eliminate copper ring shedding, and process The effect of simple preparation method

Active Publication Date: 2018-09-14
陕西华夏粉末冶金有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process method has many procedures, large material loss, high cost and low production efficiency

Method used

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  • Preparation method of iron-based powder metallurgy friction wheel
  • Preparation method of iron-based powder metallurgy friction wheel
  • Preparation method of iron-based powder metallurgy friction wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Use -100 mesh iron powder soft magnetic material with a Fe purity content of 98.5%, add a forming agent zinc stearate accounting for 0.4% of the total mass, fully mix in a V-shaped mixer, and loosely pack the powder The density is controlled at 2.6g / cm3,

[0026] Step 2: Use FWCuSn6Zn6Pb3-Ⅲ tin bronze powder, add a forming agent zinc stearate accounting for 0.5% of the total mass, and mix well in a V-type mixer, and the bulk density of the material is controlled at 3.5g / cm3.

[0027] Step Three: See figure 1 , figure 2 , put the powder material in step 1 into the female mold cavity of the mold, and the unit pressing pressure is 5-7T / cm 2 Under the conditions of pressing and forming, the blanks A1 and A2 are made, and the density of the blank is controlled at 6.4-6.6g / cm 3 ,

[0028] Step 4: The blanks A1 and A2 are sintered in a continuous sintering furnace under a protective atmosphere of a mixed gas of 40% liquid nitrogen gas and 60% ammonia decomposition...

Embodiment 2

[0034] Step 1: Use -100 mesh iron powder soft magnetic material with a Fe purity content of 99.5%, add a forming agent accounting for 0.6% of the total mass, and fully mix it in a V-type mixer, and the bulk density of the powder is controlled at 2.8 g / cm3,

[0035] Step 2: Use FWCuSn6Zn6Pb3-Ⅲ tin bronze powder, add 0.7% of the total mass of forming agent, fully mix in a V-shaped mixer, and control the bulk density of the material at 4.4g / cm3,

[0036] Step Three: See figure 1 , figure 2 , put the powder material in step 1 into the female mold cavity of the mold, press and form under the condition of unit pressing pressure 7T / cm2, and make blanks A1 and A2, and the density of the pressed blanks is controlled at 6.6g / cm3,

[0037] Step 4: The blanks A1 and A2 are sintered in a continuous sintering furnace under a protective atmosphere of a mixed gas of 40% liquid nitrogen gas and 60% ammonia decomposition gas. The blanks first enter the pre-sintering zone, the pre-sintering t...

Embodiment 3

[0043] Step 1: Use -100 mesh iron powder soft magnetic material with a Fe purity content of 99.%, add a forming agent zinc stearate accounting for 0.5% of the total material, and mix well in a V-shaped mixer until the powder is loose The packing density is controlled at 2.7g / cm3,

[0044] Step 2: Use FWCuSn6Zn6Pb3-Ⅲ tin bronze powder, add 0.6% of the forming agent zinc stearate in the total material, and fully mix in a V-shaped mixer to obtain a powder material. The bulk density of the material is controlled at 4g / cm3.

[0045] Step Three: See figure 1 , figure 2 , put the powder material in step 1 into the female mold cavity of the mold, press and form under the condition of unit pressing pressure 6T / cm2, and make blanks A1 and A2, and the density of the pressed blanks is controlled at 6.5g / cm3,

[0046]Step 4: The blanks A1 and A2 are sintered in a continuous sintering furnace under a protective atmosphere of a mixed gas of 40% liquid nitrogen gas and 60% ammonia decompos...

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Abstract

The invention discloses a preparation method of an iron-based powder metallurgy friction wheel. The preparation method comprises the steps that a blank A1 and a blank A2 are made from iron powder softmagnetic material, the blank A1 and the blank A2 are sintered in a continuous sintering furnace under the protective atmosphere of ammonia decomposition and liquid nitrogen mixed gas, a blank A3 is made from FWCuSn6Zn6Pb3-Tin bronze powder, A1, A2 and A3 are connected together to form a composite part C, the composite part C is put into a hydrogen sintering furnace for sintering and is dischargedafter cooling, a semicircular inner hole of the sintered part C is subjected to fine shaping treatment, and a rubber ring is bonded into an annular groove of the part C to obtain a finished product.Due to different atmosphere protection and secondary sintering, the sintering of a tin bronze ring and soft magnetic matrix material of the friction wheel is closely combined, the phenomenon of copperring falling off in the use of the friction wheel of a machined inlaid copper ring is eliminated, and the characteristics that the preparation method is simple, the material is saved and the production efficiency is high are achieved.

Description

technical field [0001] The invention relates to the field of powder metallurgy material preparation, in particular to a method for preparing an iron-based powder metallurgy friction wheel. Background technique [0002] The friction wheel is mainly used in the electric curtain control system. At present, the production process of friction wheels mostly uses blanks such as electrical pure iron DT4 or raw material pure iron YT3, etc., which are machined and processed into final finished parts. The production process method has many procedures, large material loss, high cost and low production efficiency. The friction wheel made of iron-based powder metallurgy soft magnetic material and production technology has high product precision, high magnetic induction intensity, low coercive force, stable electromagnetic performance, and greatly improved production efficiency. [0003] purpose of invention [0004] In order to solve the problems in the prior art, the invention provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/06B22F1/00B22F3/02B22F3/10
CPCB22F3/02B22F3/1007B22F7/062B22F1/10
Inventor 左鹏军王海文杨聪斌陈嘉川王利平高源陈晓晓仝晓楠王行之
Owner 陕西华夏粉末冶金有限责任公司
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