Documents matching your search: 16 [shown 10]
- Electron Beam Welding
Accordance to query: 84.5%
Fragments of message :
... The original work was done in a high vacuum...
More: http://euwelding.com/post_1202075926.html
... In both systems, the electron gun and the work piece are housed in a vacuum chamber...
... These are the electron beam gun , the power supply with controls, and a vacuum work chamber with work-handling equipment...
... Recent advances in equipment allow the work chamber to operate at a medium vacuum or pressure...
... In this system, the vacuum in the work chamber is not as high...
... It is sometimes called a "soft" vacuum...
... This vacuum range allowed the same contamination that would be obtained in atmosphere of 99...
... Mechanical pumps can produce vacuums to the medium pressure level...
... however, for high-carbon steel this is a disadvantage and cracking may occur...
... In high vacuum chamber welding special techniques must be used to properly align the electron beam with the joint...
... however, when welding mild steel highly deoxidized filler metal is sometimes used...
... The metals that are most often welded are the super alloys, the refractory metals, the reactive metals, and the stainless steels...
... The price of the equipment is very high and it is expensive to operate due to the need for vacuum pumps... - Laser Beam Welding
Accordance to query: 9.01%
Fragments of message :
... Rapid cooling rates can create problems such as cracking in high carbon steels...
More: http://euwelding.com/post_1202071899.html
... The laser beam has been used to weld carbon steels, high strength low alloy steels, aluminum, stainless steel and titanium... - Thermit welding method for rail joints
Accordance to query: 2.16%
Fragments of message :
... In this process, the highly exothermic reaction between aluminium and iron oxides results in the production of molten steel which is poured into a mould around the gap to be welded...
More: http://euwelding.com/post_1202076065.html
... The superheated molten metal causes the rails to melt at the edges of the gap to be welded, and it is also the filler metal, so that the material from the rails coalesces with and joins the added molten steel as it solidifies to form a weld...
... The excess Thermit steel over the head of the rail (head riser) is removed after solidification (but when the metal is still red hot) by either manual chiseling or using hydraulic weld trimmers...
... The remaining refractory material is removed and the steel vent risers attached to the collar of the foot of the weld are snapped off... - Thermit Welding
Accordance to query: 1.22%
Fragments of message :
... The superheated steel is contained in a crucible located immediately above the weld joint...
More: http://euwelding.com/post_1202070077.html
... The superheated steel runs into a mold which is built around the parts to be welded...
... Since it is almost twice as hot as the melting temperature of the base metal melting occurs at the edges of the joint and alloys with the molten steel from the crucible... - Thermit reaction details
Accordance to query: 1.22%
Fragments of message :
... ) The various iron oxides are used in appropriate proportions so as to get the correct resultant quantity and temperature of molten steel...
More: http://euwelding.com/post_1202074470.html
... Approximately equal quantities of molten steel and liquid aluminium oxide are separated at about 2400°...
... To produce an alloy of the correct composition, alloys like ferro-manganese are added to the mixture along with pieces of mild steel, both as small particles, to allow rapid dissolution in the molten iron, to control the temperature and to increase the "metal recovery"... - History of Welding
Accordance to query: 0.54%
Fragment of message :
... Coffin in the late 1800s, even as carbon arc welding , which used a carbon electrode...
More: http://euwelding.com/post_1200287944.html - Thermit material
Accordance to query: 0.54%
Fragments of message :
... Molten steel is produced by the reaction in a magnesite-lined crucible...
More: http://euwelding.com/post_1202072500.html
... This thimble provides a passage through which the molten steel is discharged into the mold... - Disc laser welds 10mm thick mild steel
Accordance to query: 0.54%
Fragments of message :
... Disc laser welds 10mm thick mild steel Offering up to 8kW power, a disc-type laser has low running cost and 25% efficiency, and will weld almost all metals with ease and even highly reflective metals such as copper or aluminium...
More: http://euwelding.com/post_1203435766.html
... The laser is able to achieve a weld penetration depth of 10mm in mild steel at a speed of 1m/min... - Welding Costs and Trends
Accordance to query: 0.14%
Fragment of message :
... Other key areas of research and development include the welding of dissimilar materials (such as steel and aluminum, for example) and new welding processes , such as friction stir, magnetic pulse, conductive heat seam, and laser-hybrid welding...
More: http://euwelding.com/post_1200289071.html - Thermite
Accordance to query: 0.14%
Fragment of message :
... In fact, rust is the oxidation of steel or iron at very slow rates...
More: http://euwelding.com/post_1202071545.html