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Composite material piece and manufacturing method thereof

A composite material and manufacturing method technology, applied in the manufacture of composite material parts, the field of composite material parts, can solve the problems of high cost, easy peeling of wear-resistant materials, cumbersome manufacturing process, etc.

Active Publication Date: 2013-06-05
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the base material usually needs to be forged at high temperature in advance, and then the wear-resistant layer is bonded to the base material by the surface sintering method, so that not only the manufacturing process is cumbersome and the cost is high, but also the bonding interface between the base material and the wear-resistant layer is difficult. Poor, the wear-resistant material is easy to peel off during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]The first powder includes: 0.5% by weight of Cr, 0.5% by weight of Mo, 0.2% by weight of C and 98.8% by weight of Fe;

[0039] The second powder includes: 40% by weight of bonding alloy powder and 60% by weight of hard reinforcing particle powder, the composition of the bonding alloy powder is the same as that of the first powder, and the hard reinforcing particle powder is WC.

[0040] Forming step: fill the first powder and the second powder into the mold respectively, press and form a green body through a compression molding process, and the forming pressure is 400 MPa.

[0041] Sintering step: at a sintering temperature of 1300°C and a vacuum pressure of 1.0×10 -2 Pa, under the condition that the sintering time is 0.5 hours, the green body is sintered to form a sintered body.

[0042] Repressing step: place the cooled sintered body in a repressing mold for repressing treatment, the repressing temperature is 800°C, and the repressing pressure is 400MPa.

Embodiment 2

[0044] The first powder includes: 2.5% by weight of Cr, 2.5% by weight of Mo, 0.5% by weight of C and 94.5% of Fe;

[0045] The second powder includes: 50% by weight of bonding alloy powder and 50% by weight of hard reinforcing particle powder, the composition of the bonding alloy powder is the same as that of the first powder, and the hard reinforcing particle powder is WC.

[0046] Forming step: filling the first powder and the second powder into the mold respectively, pressing and forming a green body through a compression molding process, and the forming pressure is 500 MPa.

[0047] Sintering step: at a sintering temperature of 1200°C and a vacuum of 8×10 -3 Pa, under the condition that the sintering time is 1.5 hours, the green body is sintered to form a sintered body.

[0048] Repressing step: place the cooled sintered body in a repressing mold for repressing treatment, the repressing temperature is 900°C, and the repressing pressure is 300MPa.

Embodiment 3

[0050] The first powder includes: 3% by weight of Cr, 3% by weight of Mo, 1% by weight of C and 93% by weight of Fe;

[0051] The second powder includes: 60% by weight of bonding alloy powder and 40% by weight of hard reinforcing particle powder, the composition of the bonding alloy powder is the same as that of the first powder, and the hard reinforcing particle powder is WC.

[0052] Forming step: fill the first powder and the second powder into the mold respectively, press and form a green body through a compression molding process, and the forming pressure is 600 MPa.

[0053] Sintering step: at a sintering temperature of 1000°C, 7×10 -3 Pa, under the condition that the sintering time is 2 hours, the green body is sintered to form a sintered body.

[0054] Repressing step: place the cooled sintered body in a repressing mold for repressing treatment, the repressing temperature is 1000°C, and the repressing pressure is 200MPa.

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Abstract

The invention discloses a method for manufacturing a composite material piece. The composite material piece comprises a first material layer and a second material layer which are bonded with each other. The method comprises the following steps of: respectively filling first powder for forming the first material layer and second powder for forming the second material layer into a die, and pressingto form a blank; and sintering, namely sintering the blank to form a sintered body. The invention also discloses the composite material piece. The composite material piece comprises the first material layer and the second material layer which are bonded with each other, wherein the first material layer and the second material layer are bonded into a whole by synchronously sintering the first powder for forming the first material layer and the second powder for forming the second material layer. Through the technical scheme, the first material layer or the second material layer is not requiredto be formed in advance, so that the composite material piece is convenient to manufacture and low in cost; and the first material layer and the second material layer of the composite material piece are difficult to separate from each other and fall, so the service life of the composite material piece is long.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a method for manufacturing a composite material part, and also to a composite material part. Background technique [0002] Composite material parts are widely used parts in the mechanical field. For example, wear-resistant parts can include a base layer made of ordinary materials and a wear-resistant layer made of wear-resistant materials. The base layer and wear-resistant layer are combined with each other. Through Wear layer to resist wear and prolong the life of wear parts. For example, spectacle plates and cutting rings are key wear-resistant parts in concrete pumping equipment, which need to withstand frequent impacts and severe wear, requiring the base material to have high strength and toughness and the wear-resistant layer to have extremely high wear resistance. . [0003] The Chinese patent application with the publication number CN102199718A discloses a method of manu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/02
Inventor 刘延斌付玲任会礼王霄腾
Owner ZOOMLION HEAVY IND CO LTD
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