Recommended practices for electron beam welding and allied by American National Standards Institute.; American Welding

By American National Standards Institute.; American Welding Society.; American Welding Society. Technical Activities Committee

This record provides steered Practices for Electron Beam Welding and Allied strategies. it really is meant tocover universal purposes of the method. approaches definitions, safety, common method requisites, and inspection standards are provided.

summary: This record offers steered Practices for Electron Beam Welding and Allied methods. it's meant tocover universal purposes of the method. tactics definitions, protection, common method requisites, and inspection standards are supplied

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The beam is scanned normal to the joint path using the system’s beam deflection capability. The level of backscatter current is monitored using an antenna at the entrance point of the beam into the work chamber (see Figure 16). The change in current is usually displayed on a monitor which has an enhanced spot showing the aligned beam position. As the joint is traversed, the table or gun is moved to bring the beam spot to the point of maximum inflection on the monitor. This technique can be used to program a joint for computer-controlled welding or to align a fixtured weld joint.

In order to avoid porosity during electron beam welding, many fabricators use low gas content vacuum or double vacuum melted materials. Other means for reducing gaseous porosity during electron beam welding include the use of beam oscillation to stir the weld pool and allow additional time for trapped gas to escape from the molten material. Slower travel speeds have also proven effective in reducing gaseous porosity. 1 Carbon and Low Alloy Steels. 60% silicon. They are used in the as-rolled, annealed, or normalized condition.

One commonly used means of strengthening a material is by work-hardening through cold-working operations, such as swaging, drawing, rolling, planishing, or peening. Strengthening also occurs when final hot-working operations are done at temperatures below the recrystallization temperature. Material hot worked in this fashion retains a part of the lattice strain and therefore is strengthened. 15 Figure 21—Comparison of an Electron Beam Weld and Gas Tungsten Arc Weld Profiles softer material with lower strength.

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