Stainless Steel

VOITH SULZER

Is a leading manufacturer of large equipment used in the power generation and paper mill industries. The Appleton plant is their U.S manufacturing facility for paper mill equipment. Since 1984, the Appleton plant has relied on a VSR 790 System to perform their stress relief of medium (1/2 Ton) to large (50 Ton), dimensionally critical components.

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ARGONNE NATIONAL LABORATORY

Is one of several U.S government operated large research facilities. When an ARGONNE program required a multiple number of highly precise titanium workpieces, involving extensive, high-stock removal machining, they specified VSR Technology Group’s VSR-8000 Vibratory Stress Relief System to assure consistent dimensional quality.

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VOITH SIEMENS JOB #2

VOITH-SIEMENS is a manufacturer of power generation systems. One of their more recent designs involved the use of both low-carbon and austenitic stainless steels in the construction of a 4-quadrant hydro-turbine bottom ring. The VSR Process was used to prevent distortion occurring during either final machining, or the transport of the disassembled bottom ring to the installation site.

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VOITH SIEMENS JOB #1

A manufacturer of hydro-turbine equipment used for power generation received an order to replace 4 tons of cavitated cast steel in 100,000 lb. bottom ring assembly, they chose the vibratory stress relief process to assure stability throughout fabrication and machining. The result was not only an 80% to 90% reduction of distortion at a critical stage in the fabrication process, but also a considerably more stable work piece during final machining.

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S. W. HOOPER (SWH)

Is a manufacturer of rotary design paper pulp pumping systems. SWH’s pumps use a 316 stainless steel, fin-rotor design: the operating fins provide the pumping action. SWH purchased a VSR Vibratory Stress Relief System for these rotors and other workpieces in 1990, and since then predictability during and after machining has improved dramatically.

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ATI-ALLVAC

This report describes using the vibratory stress relief process on a fabricated 20 foot diameter inlet with dome cover assembly made of 304 stainless steel. This assembly was welded to a 28 foot diameter vacuum furnace. The fit between the dome and inlet flanges, responsible for the integrity of the furnace’s seal was a major concern to ALLVAC, and VSR Technology’s vibratory metal stabilization process was chosen to stress relieve the assembly prior to welding it to the furnace.

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