Laser near net forming method of functional graded friction stir welding stirring head

A laser near-net-shaping and friction stir welding technology is applied in the field of friction stir welding, laser processing technology, and functionally graded materials, and can solve the problems of easy wear, high manufacturing cost of tungsten-based materials, and fracture of polycrystalline cubic boron nitride materials. problems such as low toughness, to achieve the effect of improving the service life, improving the overall fracture toughness, and expanding the scope of use

Active Publication Date: 2019-03-26
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a functional gradient friction stir welding stirring head laser near-net forming method to solve the problems of easy wear of the stirri

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
  • Laser near net forming method of functional graded friction stir welding stirring head
  • Laser near net forming method of functional graded friction stir welding stirring head
  • Laser near net forming method of functional graded friction stir welding stirring head

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] The method for preparing a functionally graded friction stir welding stirring head proposed by the present invention will be further clarified below with reference to the accompanying drawings and specific embodiments. According to the following description and claims, the advantages and features of the present invention will be clearer.

[0020] The core idea of ​​the present invention is that the functionally graded friction stir welding stirring head laser near-net shaping method provided by the present invention can realize the material of the stirring head from the material with good toughness, high strength and good economy of the main part of the stirring head to the stirring head. The material with good high temperature wear resistance on the end face of the shaft shoulder and the surface of the stirring needle can realize the gradient transition of the composition, and then the transition of the performance gradient.

[0021] The present invention takes 316 stainles...

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 provides a preparation method of a functional graded friction stir welding stirring head. According to the preparation method, high-temperature wear resistant materials are adopted in friction positions with workpieces, i.e. the surfaces of a stirring pin and a shaft shoulder; materials with good toughness, high strength and good economy are adopted in non-contact positions of the center of the stirring pin and the end surface of the shaft shoulder, and finally, a laser near net forming mode is adopted so as to realize graded transition of the two materials and near net forming of the stirring head. According to the laser near net forming method of the functional graded friction stir welding stirring head, the stirring pin and the shaft shoulder which make direct contact withmetal when the stirring head is operated can have good high-temperature wear resistant performance, and the whole stirring head has the advantages of good toughness, high strength and good economy. Compared with traditional tool steel and die steel, the laser near net forming method has the advantages that the application range of a stirring tool is enlarged, and the service life is prolonged; compared with a tungsten-based stirring head and a polycrystalline cubic boron nitride stirring head, the laser near net forming method has the advantage that the whole fracture toughness and the manufacturing economy of the stirring head are greatly increased.

Description

technical field [0001] The invention relates to the technical field of laser processing, the field of friction stir welding, and the field of functionally graded materials, in particular to a laser near-net forming method for a stirring head of functionally graded friction stir welding. Background technique [0002] Laser near-net-shaping technology is a kind of additive manufacturing. It is a new advanced manufacturing technology that integrates computer technology, laser technology, sensor technology and material solidification, and is affected by many factors. It is suitable for metals and ceramics. Forming of various materials. This technology uses 3D modeling software to build a solid model of the part and slice it layer by layer to generate a motion trajectory, and uses a high-energy laser beam to form a molten pool on the surface of the metal or ceramic. The powder is transported into the molten pool by an inert gas, and forms a cladding under the action of the laser....

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
IPC IPC(8): B23K26/00B23K20/12
CPCB23K20/122B23K26/00
Inventor 郝云波赵凯董吉义赵维刚杨洋黄征
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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