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Production method for segregation-free iron-based mixed powder

A mixed powder and production method technology, which is applied in the production field of non-segregation iron-based mixed powder, can solve the problems of unstable size of pressed and sintered products, affecting the service life and stability of mechanical equipment, and large fluctuations in hardness, etc., to achieve reduction Segregation of dust and alloying elements, improved consistency, and improved fluidity

Inactive Publication Date: 2018-03-27
朝阳金河粉末冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The segregation of powder components is likely to cause the problems of unstable dimensions and large fluctuations in hardness of pressed and sintered products. When these products are assembled into mechanical equipment, they will affect the service life and stability of the entire mechanical equipment

Method used

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  • Production method for segregation-free iron-based mixed powder
  • Production method for segregation-free iron-based mixed powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1), ingredients

[0029] Such as figure 1 As shown, when batching, put the material into the hopper, first put part of the base powder into the hopper to form the bottom base powder layer, then add alloy powder into the hopper to form an alloy powder layer, add binder to the hopper to form a binder layer, Finally, add the remaining base powder in the funnel to form the uppermost base powder layer; For graphite powder with a total mass of 0.6%, the amount of copper powder added accounts for 1.8% of the total mass of the base powder; The amount accounts for 2 / 3 of the total mass of the base powder; (2), mixing

[0030] The material in the hopper is sent into a three-dimensional mixing mixer for mixing to obtain mixed powder. During mixing, the rotating speed of the three-dimensional mixing mixer is 25r / min, and the mixing time is 30min;

[0031] (3), screening

[0032] After the material is mixed by the mixer, it is fed into the high-frequency in-line sieve 1 through...

Embodiment 2

[0038] (1), ingredients

[0039] When batching, put the material into the hopper, first put part of the base powder into the hopper to form the bottom base powder layer, then add alloy powder into the hopper to form an alloy powder layer, add binder into the hopper to form a binder layer, and finally put into the hopper Add the remaining base powder to form the uppermost base powder layer; the base powder is iron powder, the alloy powder is copper powder, and the binder is paraffin powder accounting for 1.0% of the total mass of the base powder and 1.0% of the total mass of the base powder. 0.3% graphite powder, the addition of copper powder accounts for 2.5% of the total mass of the base powder; 2 / 3 of the total powder mass;

[0040] (2), mixing

[0041] The material in the hopper is sent into a three-dimensional mixing mixer for mixing to obtain mixed powder. During mixing, the rotating speed of the three-dimensional mixing mixer is 20r / min, and the mixing time is 40min; ...

Embodiment 3

[0047] (1), ingredients

[0048]When batching, put the material into the hopper, first put part of the base powder into the hopper to form the bottom base powder layer, then add alloy powder into the hopper to form an alloy powder layer, add binder into the hopper to form a binder layer, and finally put into the hopper Add the remaining base powder to form the uppermost base powder layer; the base powder is iron powder, the alloy powder is copper powder, and the binder is paraffin powder accounting for 0.8% of the total mass of the base powder and 0.8% of the total mass of the base powder. 0.4% graphite powder, the amount of copper powder added accounted for 2% of the total mass of the base powder; 2 / 3 of the total powder mass;

[0049] (2), mixing

[0050] The material in the hopper is sent into a three-dimensional mixing mixer for mixing to obtain mixed powder. During mixing, the rotating speed of the three-dimensional mixing mixer is 20r / min, and the mixing time is 40min;...

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Abstract

Provided is a production method for segregation-free iron-based mixed powder. The production method comprises the steps that during burdening, materials are put into a hopper, part of base powder is put into the hopper firstly to form a bottom base powder layer, then alloy powder is added to the hopper, a binder is added to the hopper, and finally remaining base powder is added to the hopper; thematerials in the hopper are conveyed into a three-dimensional mixing machine and mixed, the mixed powder is obtained, and after the materials are uniformly mixed through the mixing machine, the materials are fed into a high-frequency direct-discharging screen through a feeding opening and screened through the high-frequency direct-discharging screen; and a conveying pipe with the automatically telescopic length is connected to a discharging opening in the bottom of the high-frequency direct-discharging screen, the materials are put into packaging bags, and a control valve is turned off when the weight in the packaging bags reaches the requirement. The production method has the beneficial effects that the process is simple and easy to implement, the prepared iron-based mixed powder is uniform in ingredient, no segregation phenomenon exists, the production method is suitable for production of powder metallurgical products, and the quality of the products is stable.

Description

technical field [0001] The invention relates to a production method of non-segregation iron-based mixed powder. Background technique [0002] As one of the important modern manufacturing methods, powder metallurgy has the advantages of high efficiency, low cost and high material utilization, so it has been more and more widely used in industrial production. Among the powder metallurgy products, the iron-based products have the largest market share and the widest application. The iron-based mixture is generally composed of iron powder, graphite, lubricant and other components, and the problem of segregation has always existed. The segregation of powder components is likely to cause the problem of unstable dimensions and large fluctuations in hardness of pressed and sintered products. When these products are assembled into mechanical equipment, they will affect the service life and stability of the entire mechanical equipment. [0003] With the progress of society and the int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
CPCB22F1/0003
Inventor 孙志国蔡希龙李佳徽杜文宇
Owner 朝阳金河粉末冶金材料有限公司
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