Hollow variable-diameter porous friction head and preparation method for surface composite material of metal material

A technology for surface composite materials and metal materials, which is applied in the field of preparing metal material surface composite materials by friction stir processing, can solve the problems of uneven distribution of reinforcement phases, particle splashing and moving, etc., to achieve increased processing range, uniform distribution and dispersion, The effect of broad application prospects

Inactive Publication Date: 2014-08-06
HARBIN INST OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that FSP is applied to the preparation of metal matrix composites. It is necessary to preset the reinforcement phase in the material to be processed, which will cause the particles to splash and move during the processing of the material, resulting in uneven distribution of the reinforcement phase. To solve the problem, provide a method for preparing a hollow variable-diameter porous friction head and a composite material on the surface of a metal material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hollow variable-diameter porous friction head and preparation method for surface composite material of metal material
  • Hollow variable-diameter porous friction head and preparation method for surface composite material of metal material

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment. The friction head of this embodiment includes a friction stirring body, a variable diameter plate 4 and eight sealing screws 5. The friction stirring body 1 is composed of an upper cylinder 1 and a lower cylinder 2. The upper cylinder 1 It is arranged up and down with the lower cylinder 2 and made into one body. The diameter of the upper cylinder 1 is smaller than the diameter of the lower cylinder 2. The outer surface of the upper cylinder 1 is provided with a clamping surface 1-1. The lower cylinder The lower end surface of 2 is a concave shoulder surface 2-1 whose outer edge is higher than the center, and the upper cylinder 1 and the lower cylinder 2 are provided with a channel 3 along the axis, and the channel 3 is divided into two sections from top to bottom, respectively It is the upper channel 3-1 and the middle channel 3-2. The channel 3 is used for the storage of the rei...

specific Embodiment approach 2

[0015] Specific implementation mode two: combination figure 1 To illustrate this embodiment, the inner diameter of each lower vertical channel 2-4 in this embodiment is smaller than the inner diameter of the middle channel 3-2. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0016] Specific implementation mode three: combination figure 1 Describe this implementation mode, this implementation mode is realized through the following steps:

[0017] Step 1. Determine the geometric size of the friction head: Determine the diameter D of the shoulder of the friction head according to the width of the primary surface composite materialization of the workpiece to be processed. The diameter D of the friction head shoulder is equal to the width of the primary surface composite materialization. The inner diameter of the channel 2-4 is 0.1D to 0.2D, and the outer edge of the concave shoulder surface 2-1 is 0.2mm to 1.5mm higher than the center of the concave shoulder surface 2-1; the width of the primary surface composite material is usually at 12mm~36mm, that is, the diameter D of the shoulder of the friction head is 12mm~36mm, when D=12mm, the inner diameter of the lower channel 3-3 is 0.17D (ie 2mm), when D=24mm, the inner diameter of the lower channel 3-3 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a hollow variable-diameter porous friction head and a preparation method for a surface composite material of a metal material, particularly relates to the friction stir welding friction head and a welding method, and solves the problem that for preparation of a metal matrix composite material, an enhanced phase is distributed unevenly because particles are splashed and translated in a material processing process caused by the fact that the enhanced phase is needed to be placed in a material to be processed. A welding tool comprises an upper cylinder body and a lower cylinder body which are vertically arranged and made into a whole, the upper cylinder body and the lower cylinder body are provided with an upper hole channel and a middle hole channel respectively along axes, four horizontal through holes are all communicated with the middle hole channel, each horizontal through hole is communicated with two lower vertical hole channels, a variable-diameter sheet is arranged at the bottom of the upper hole channel, and the inner diameter of a variable-diameter hole is less than the inner diameter of the middle hole channel. The method includes: 1 determining geometric dimension of the friction head; 2 adding enhanced-phase particles; 3 adjusting a slant angle of the friction head; and 4 performing the friction stir processing on the surface of a workpiece to be processed, and achieving preparation of one surface composite material. The hollow variable-diameter porous friction head and the preparation method for the surface composite material of the metal material are used for preparation of surface composite material layers of the metal material.

Description

technical field [0001] The invention relates to a friction head for friction stir welding and a welding method, in particular to a method for preparing metal material surface composite materials by using friction stir processing. Background technique [0002] Friction Stir Processing (FSP) technology is a new material preparation and processing technology, which has been successfully applied to the preparation of metal matrix composites. Friction stir processing is to press a high-speed rotating processing head into the surface of the material to a millimeter-level depth, and travel along the surface of the material, causing severe plastic deformation on the surface of the material, so as to realize the densification and homogenization of the surface material. The method of using FSP to prepare metal matrix composites can be divided into two categories, indirect method and direct method. The indirect method refers to mixing metal powder and reinforcing phase particles, hot p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
Inventor 黄永宪吕世雄王天昊万龙刘会杰
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap