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Uniformly-dispersed particle reinforced metal-based composite material and preparation method thereof

A composite material and particle reinforcement technology, which is applied in metal rolling and other directions, can solve problems such as uneven stress distribution, uneven distribution of second phase particles, and reduced material processing yield, so as to reduce uneven stress distribution and process Easy to control and conducive to the effect of large-scale production

Inactive Publication Date: 2011-07-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) For particle-reinforced metal-matrix composites with inhomogeneous microstructure, that is, particle-reinforced metal-matrix composites with local stress concentration, the processing failure of the composite material due to stress concentration during processing (processing cracks or even fractures) ), reducing the processing yield of such materials;
[0008] (4) Due to the second phase particles of particle agglomeration or segregation, the processing stress concentration inside the material is also caused during the processing, resulting in uneven stress distribution during the rheological process of material processing, which easily leads to the second phase particles in the processing process. The uneven distribution of the material causes cracking or peeling of the material during processing, which reduces the quality of the material;
[0009] (5) In particle-reinforced metal matrix composites, the agglomeration or segregation of second-phase particles has a strong hindering effect on the migration of dislocations inside the material during plastic deformation, and the pinning effect of second-phase particles on dislocations The material hardening phenomenon caused by the particle reinforcement metal matrix composites is difficult to deform and process
[0010] It is for these reasons that the yield of particle-reinforced metal-based materials is low, the cost is expensive, and the performance of the material is not good.

Method used

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  • Uniformly-dispersed particle reinforced metal-based composite material and preparation method thereof
  • Uniformly-dispersed particle reinforced metal-based composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] AgCeO made by reactive synthesis 2 Composite material (CeO 2 The mass percentage is 10%) the ingot is made into a slab with a thickness of 5.0mm by extrusion, and the slab is cut into four sections and stacked into a rolled billet with a thickness of 20.0mm. After the billet is heated at 860°C for 3h Send into rolling mill, roll into the billet after rolling deformation of 5.0mm. Then, the rolled and deformed blank was processed according to the above process, and the rolling was repeated eight times. The true strain of the composite material reached 11.09, and it became the uniformly dispersed AgCeO of the second phase. 2 Composite material slab, after heating the slab at 800°C for 1h, hot rolling to a strip product with a thickness of 0.5mm, or cold rolling the slab into a strip product with a thickness of 1.0mm. According to the same process, AgSnO produced by powder metallurgy or reaction synthesis can also be 2 Composite material (SnO 2 mass percent is 10%) for...

Embodiment 2

[0046] Cu / Al made by internal oxidation 2 o 3 Composite material (Al 2 o 3 The mass percentage is 3%) the billet is made into a slab with a thickness of 10.0mm by extrusion, the slab is cut into five sections, and stacked into a rolling billet with a thickness of 50.0mm. The billet is heated at 830°C and then sent to Rolling mill, rolled into 10.0mm rolling deformed billet. Then, the rolled and deformed billet is processed according to the above process, and the rolling is repeated seven times. The true strain of the composite material reaches 11.3, and becomes the second phase uniformly dispersed Cu / Al 2 o 3 Composite material slab, the slab is cold-rolled to a strip product with a thickness of 1.0-5.0 mm.

Embodiment 3

[0048] Pb / B made by powder metallurgy 4 C composite material (B 4 C mass percentage is 4%) slabs are made into slabs with a thickness of 10.0mm by rolling, the slabs are cut into four sections, and rolled into a rolled billet with a thickness of 40.0mm, and the billets are sent after being heated at 450°C Enter the rolling mill, and roll into a 10.0mm billet after rolling deformation. Then, the rolled and deformed billet is processed according to the above process, and the rolling is repeated eight times. The true strain of the composite material reaches 11.09, and becomes the second phase with uniform dispersion of Pb / B 4 C Composite sheet products.

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Abstract

The invention discloses a particle reinforced metal-based composite material product (rods, wires, sheets or belts, or parts) which is obtained, based on the severe plastic deformation theory of material, by the step of performing severe plastic / accumulated deformation processing on a particle reinforced metal-based composite material so that second phase particles agglomerated in a metallic matrix are uniformly distributed (dispersed) in the matrix, and then carrying out subsequent processing, thereby enhancing the quality and the yield of the particle reinforced composite material and lowering the processing cost of the material, and thus a particle reinforced metal-based composite material having the characteristic of the uniformly distributed second phase particles and excellent performance is obtained.

Description

technical field [0001] The invention relates to the scientific field of metal-matrix composite materials, in particular to the processing technology of the second phase in the metal-matrix composite material reinforced by uniformly dispersed particles. Background technique [0002] Particulate Reinforced Metal Matrix Composites (PRMMC) is a type of metal matrix composites, which is to add the second phase of ceramic particles (reinforced phase) or self-generated into the metal matrix to obtain both metal advantages ( toughness and plasticity) and the advantages of reinforcing particles (high hardness and high modulus). [0003] The preparation methods of known particle-reinforced metal matrix composites mainly include powder metallurgy, casting (prefabricated block infiltration method, mechanical stirring method, high-energy ultrasonic composite method, etc.), in-situ composite method (Lanxid TM method, exothermic dispersion method, in-situ synthesis technology, etc.), seve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10B21B1/38B21C23/00
Inventor 陈敬超周晓龙张昆华管伟明杜焰于杰
Owner KUNMING UNIV OF SCI & TECH
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