A method for preparing and processing a large thin-walled shell made of aluminum matrix composite material

A technology of aluminum-based composite materials and thin-walled shells, applied in metal processing equipment, etc., can solve the problems of uneven particle distribution, poor particle distribution uniformity, and affecting the overall performance of products, so as to facilitate spinning forming and reduce Area of ​​action, effect of good application promotion

Active Publication Date: 2016-04-27
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the advantages of short process flow, labor-saving forming, and low cost. However, the particle agglomeration of the tube billet prepared by powder metallurgy or casting is serious, the uniformity of particle distribution is poor, the plasticity of the composite material is low, the subsequent spinning is difficult, and the particle distribution is uneven. Inhomogeneity affects the overall performance of the product
[0003] After searching the existing technical literature, it is found that there are few reports on the preparation and processing of large thin-walled shells made of aluminum matrix composite materials in Chinese patents

Method used

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  • A method for preparing and processing a large thin-walled shell made of aluminum matrix composite material
  • A method for preparing and processing a large thin-walled shell made of aluminum matrix composite material
  • A method for preparing and processing a large thin-walled shell made of aluminum matrix composite material

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Experimental program
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Effect test

Embodiment 1

[0038] Processing object is A1 2 0 3 / 2124 composite shell (see attachment figure 2 ), A1 was prepared by powder metallurgy process 2 0 3 / 2124 Composite materials, A1 in composite materials 2 0 3The volume fraction of particles is 5%, the average size is 5 μm, and the diameter of the composite ingot is Ф500 mm. Use ordinary carbon steel to sheath the composite material ingot. The forging temperature of the sheath is 400°C. Two fires are used for piercing and drawing. The deformation of each fire is not less than 70%, and it is rounded into a bar. After the material is punched, forged and machined, it is prefabricated into a hollow blank with an outer diameter of 400mm and an inner diameter of 200mm. Then carry out isothermal compound extrusion, the extrusion temperature is 445°C, the extrusion speed is 0.1mm / s, and the extrusion ratio is 5.2; after machining, the outer diameter of the tube blank is Ф396mm, and the wall thickness is 10mm. Carry out hot and powerful spi...

Embodiment 2

[0040] Processing object is A1 2 0 3 / 2124 composite shell (see attachment image 3 ), the preparation of the composite material tube blank and the hot-warm strong thinning spinning and heat treatment are the same as in Example 1. When the wall thickness of the hot strong spinning tube blank is 5mm, the cone surface is formed by shear spinning, and the shear spinning temperature, The supplementary heat method and tool preheating temperature are the same as the shear spinning temperature, supplementary heating method and tool preheating temperature of thermal force thinning spinning, the feed ratio is 0.9mm / r, and the thinning rate is 20%. ; After the cone surface is formed, the two ends of the shell are subjected to hot and strong thinning and spinning, and the final pass of the finished product is formed by warm spinning.

Embodiment 3

[0042] Processing object is A1 2 0 3 / 6061 composite shell (see attachment Figure 4 ), A1 was prepared by stirring casting process 2 0 3 / 6061 Composite materials, A1 in composite materials 2 0 3 The volume fraction of particles is 8%, the average size is 7 μm, and the diameter of the composite ingot is Ф380 mm. Use ordinary carbon steel to sheath the composite material ingot. The forging temperature of the sheath is 450°C. Two fires are used for piercing and drawing. The deformation of each fire is more than 70%, and it is rounded into a rod. After the forging rod is blanked Carry out punching forging and machining, and prefabricate a hollow blank with an outer diameter of 300mm and an inner diameter of 140mm. Then carry out isothermal compound extrusion, the extrusion temperature is 500°C, the extrusion speed is 0.05mm / s, and the extrusion ratio is 4.7; after machining, the outer diameter of the tube blank is Ф296mm, and the wall thickness is 9mm. Carry out hot and p...

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Abstract

The invention belongs to the field of preparation and processing of difficultly-deformed material thin-wall complex components and particularly relates to a preparing and processing method of an aluminum base composite material large thin-wall shell. The method comprises preparing ingot blanks through a stirring mixing and powder metallurgy process and forging the blanks; after feeding forged rods, punching and prefabricating the forged rods into hollow blanks, performing isothermal combined extrusion on the prefabricated hollow blanks to obtain tube blanks which are uniform in particle distribution and fine and even in matrix structure; performing multiple hot strengthened thinning spinning on the extruded tube blanks to obtain composite extruded tube blanks; performing multiple hot-warm combined spin forming to obtain composite material thin-wall shells; pickling and cleaning the obtained shells, and then performing finish product thermal treatment. The aluminum base composite material large thin-wall shell prepared through the method can effectively improve the distribution uniformity of composite material particles and enhance the plasticity and the forming capacities of the composite material particles and meanwhile is high in comprehensive performance, labor-saving in forming and high in additional value.

Description

technical field [0001] The invention particularly relates to a method for preparing and processing a large-scale thin-walled shell made of an aluminum-based composite material, and belongs to the field of preparing and processing thin-walled complex components of difficult-to-deform materials. Background technique [0002] Aluminum matrix composites have the advantages of high specific strength, high specific modulus, good wear resistance and dimensional stability, and are widely used in aerospace technology, automobile manufacturing, advanced equipment and other fields. The large thin-walled aluminum matrix composite shell is a complex component with light weight, high strength and high modulus, which can further reduce the weight of equipment, and has a good application prospect in advanced weapons. Chinese patent (ZL200910242479.9) discloses the use of powder metallurgy or stirring casting (preparation of tube billet) + strong spinning short-process method to prepare and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21J5/06B21D22/14B21C23/00
CPCB21C23/085B21D22/14B21J5/002B23P15/00
Inventor 郭胜利
Owner 有研金属复材技术有限公司
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