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Preparation method of surface metal-based composite gradient material

A gradient material and surface metal technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of easy segregation, high production cost, waste of particles, etc., to achieve excellent surface formability, improved production efficiency, Backfill Timely Effects

Pending Publication Date: 2022-08-05
XIAN UNITED PRESSURE VESSEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above four ways of adding reinforcement phase particles can meet the needs of preparing surface metal matrix composites to a certain extent, there are serious problems in the process of friction stir processing.
First, although the first two methods use flat heads for sealing pretreatment, the actual operation is difficult, the sealing effect is not ideal, the amount of reinforcement phase particles is large, and the waste is serious; second, the way of adding reinforcement phase particles in the sandwich structure is During the processing, the particles are prone to segregation due to the action of the fixture and the stirring needle. At the same time, this method also wastes a lot of particles; third, the method of adding reinforcement phase particles to the hollow structure stirring head has higher requirements on the comprehensive performance of the stirring head. high production cost

Method used

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  • Preparation method of surface metal-based composite gradient material
  • Preparation method of surface metal-based composite gradient material
  • Preparation method of surface metal-based composite gradient material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment includes the following steps:

[0050] Step 1, using wire cutting to open a closed through slot inside the metal substrate to obtain a metal substrate with a closed through slot; the shape of the closed through slot is a triangular prism, and the cross-sectional shape of the closed through slot is a triangle; The base of the triangle is 2.5mm, the height is 2.5mm, and the two base angles α and β are both 63°; the metal substrate is an AZ31 magnesium alloy substrate with a thickness of 6mm, a length of 60mm, and a width of 60mm; wire-cut molybdenum wire The diameter is 0.2mm;

[0051] Step 2, adding reinforcing phase particles into the closed through groove of the metal substrate with closed through grooves obtained in step 1 to obtain a metal substrate to be processed; the reinforcing phase particles are hydroxyapatite, and the addition amount is 187.5 mm 3 ;

[0052] Step 3: Perform friction stir processing at the closed through groove of the metal su...

Embodiment 2

[0074] This embodiment includes the following steps:

[0075] Step 1, using wire cutting to open two closed through grooves inside the metal substrate to obtain a metal substrate with closed through grooves; the shape of the closed through grooves is a triangular prism, and the cross-sectional shape of the closed through grooves is a triangle; The base of the triangle is 2.5mm, the height is 2.5mm, and the two base angles α and β are both 63°; the metal substrate is an AZ31 magnesium alloy substrate with a thickness of 6mm, a length of 60mm, and a width of 60mm; wire-cut molybdenum wire The diameter is 0.1mm; the two closed through grooves are parallel to each other and the shortest distance between them is 10mm;

[0076] Step 2, adding reinforcing phase particles into the closed through groove of the metal substrate with closed through grooves obtained in step 1 to obtain the metal substrate to be processed; one of the reinforcing phase particles in the closed through groove ...

Embodiment 3

[0084] This embodiment includes the following steps:

[0085] Step 1, using wire cutting to open 4 closed through grooves inside the metal substrate to obtain a metal substrate with closed through grooves; the shape of the closed through grooves is a quadrangular prism, and the cross-sectional shape of the closed through grooves is a rectangle; The length of the rectangle is 2mm and the width is 2mm; the metal substrate is a TC4 titanium alloy substrate with a thickness of 6mm, a length of 600mm and a width of 60mm; the diameter of the wire-cut molybdenum wire is 0.1mm; parallel to each other and the shortest distance between them is 6mm;

[0086] Step 2, adding reinforcing phase particles to the closed through grooves of the metal substrate with closed through grooves obtained in step 1 to obtain a metal substrate to be processed; the reinforcing phase particles in the four closed through grooves are ZrO 2 and tricalcium phosphate and two kinds of reinforcement phase particl...

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Abstract

The invention discloses a preparation method of a surface metal-based composite gradient material, which comprises the following steps of: 1, forming a closed through groove in a metal substrate by adopting linear cutting to obtain the metal substrate with the closed through groove; secondly, reinforced phase particles are added into the closed through groove of the metal substrate with the closed through groove obtained in the first step, and a to-be-machined metal substrate is obtained; and thirdly, the closed through groove of the to-be-machined metal substrate obtained in the second step is subjected to stirring friction machining, and the surface metal-based composite gradient material is obtained. Serious waste caused by splashing of reinforced phase particles in the stirring friction machining process is effectively reduced by designing the closed through grooves, the reinforced phase and the metal matrix are backfilled in time, tunnel type holes are prevented from being generated, a needle-free stirring head is not needed for surface closing pretreatment, the production efficiency is multiplied, and the production cost is reduced. And the cost can also be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of composite materials and gradient materials, and in particular relates to a preparation method of a surface metal matrix composite gradient material. Background technique [0002] Friction stir welding technology is a new type of solid phase joining technology invented by the British Welding Institute in 1991. This technology can effectively reduce the pores and slag inclusions generated in traditional fusion welding, and has the characteristics of small joint deformation, automatic welding process, and high joint quality. Friction stir machining is a new processing method developed on the basis of the principle of friction stir welding. The microstructure of the processing zone can be effectively refined, homogenized and densified. [0003] Surface metal matrix composites generally use alloys as the matrix, and particles, whiskers, and fibers as reinforcing phases to improve the surface properties of th...

Claims

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Application Information

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IPC IPC(8): B23H7/02B23K20/12
CPCB23H7/02B23K20/122Y02P10/25
Inventor 袁胜男韩鹏张升懿叶建林郗大来李宁
Owner XIAN UNITED PRESSURE VESSEL CO LTD
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