Weld spatter protective coating
First Claim
1. A method of welding by localized impingement of electron beam energy on a workpiece surface, wherein the improvement comprises coating the workpiece surface with an adherent, acid resistant, heat stable, chemically removeable layer of polyimide containing less than about 0.5% by volume surfactant on the nonweld areas prior to welding, and removing the polyimide layer after welding.
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Accused Products
Abstract
By coating a workpiece with a uniform layer of polyimide containing surfactant upon the nonweld areas, spatter produced in electron beam welding of the workpiece is prevented from adhering to the workpiece surface in the nonweld areas. The polyimide coating is so constituted as to be adherent, heat stable, acid resistant, and chemically removeable. Silicone surfactant is preferred.
30 Citations
2 Claims
- 1. A method of welding by localized impingement of electron beam energy on a workpiece surface, wherein the improvement comprises coating the workpiece surface with an adherent, acid resistant, heat stable, chemically removeable layer of polyimide containing less than about 0.5% by volume surfactant on the nonweld areas prior to welding, and removing the polyimide layer after welding.
Specification
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- Resources
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Current AssigneeUnited Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
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Original AssigneeUnited Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
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InventorsAdinolfi, Robert G., Loersch, Joseph F., Jordan, Lester W.
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Primary Examiner(s)Albritton, C. L.
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Application NumberUS06/600,639Time in Patent Office470 DaysField of Search219/121 EC, 219/121 ED, 219/121 EB, 219/121 EM, 219/121 LC, 219/121 LD, 219/121 L, 219/121 LMUS Class Current219/121.14CPC Class CodesB23K 15/0046 Welding
