Our new President Dan Diehl brings new vision and leadership to build, renew, and grow. This material is perfectly weldable; the challenge lies in the design of these parts which have 3 to 5 segments that need to be joined.
The compressor vane segments shown in Fig.
The electron beam gun is located either inside the vacuum chamber or Electron beam welding thesis on the outside Figure The airfoil section of the aero vanes is less than 75 mm from ID to OD. Not all materials can be welded by an electron beam in a vacuum. Covers are milled to mate with the tips of the blades.
All values of this unique deflection parameter, such as frequency, pattern direction and size in x- and y-direction, can be programmed. Really, the credit has to go to Jim Fox and our engineering team for whipping up an elegant solution to what was a make or break problem.
Two and three vane segments in the turbine hot section are commonly produced as investment castings. Earlier work shows that the magnetic fields produced by two closely spaced keyholes may counteract one another and eliminate the beam deflection .
Another limitation to weldability may be the change of material properties induced by the welding process, such as a high speed of cooling. To explain the mechanism for the creation of porosity we have to look into the key hole and see what is going on there.
This effect is of course not as substantial as in arc welding. Since the majority of applications need axial or circumferential welds, multiple part holders should be used whenever possible in order to make the process more cost effective.
An unusual feature of the EB welds in the combustor cover shown in Fig. The use of stainless steel is very common in the industry because of its corrosion resistance to many substances, gas or liquid, which contact its surface. A characteristic of this phenomenon is that it allows the unique capability for deep, narrow welds with very small heat affected zones HAZ and minimized thermal distortions of welded assemblies Figure 2.
Click on the image above to view this article. The final effect of the beam depends on the particular combination of these parameters. Filler material is not typically used to join the majority of components hence the metallurgy does not change. Less expensive stainless steel alloys are normally used for land based applications where weight is not an issue.
The beam intersects the cover at an acute angle at the ID and finishes normal to the surface at the OD.This thesis is concerned with the porosity formation mechanism during electron beam welding of titanium-based alloys. During the welding of titanium alloys for aerospace engine applications, porosity is occasionally found in the solidified welds.
Hence the key factors responsible for porosity formation need to be identified, and guidance to minimise porosity occurrence needs to be provided. Electron-beam welding (EBW) is a fusion welding process in which a beam of high-velocity electrons is applied to two materials to be joined.
The workpieces melt and flow together as the kinetic energy of the electrons is transformed into heat upon impact.
PTR is an electron beam welding systems manufacturer and contract welding service provider on the leading-edge of electron beam and vacuum welding technology. In addition to making EB and laser welding equipment, PTR assists customers with weld process development and provides maintenance and spares support for electron beam welding systems.
Electron Beam Welding LLC works with industrial and commercial manufacturers and respected companies throughout the United States. EFFECTS OF SELECT PARAMETERS ON ELECTRON BEAM WELDING OF ALT6 ALLOY Electron beam welding is widely considered one of the best welding methods in manufacturing.
Note that many of the units provided in this thesis are non-SI units.
The U.S. welding industry. PTR, a leading Electron Beam Welding system manufacturer & EB Welding Service Provider, offers this technical paper which is an overview of the unique features Electron Beam Welding Process, Applications and Equipment | PTR-Precision Technologies, Inc.Download