| 摘要 |
An improved welding chill is formed by covering a surface area of a part opposite from an area which is to be welded, with a body of powdered metal. The body of powdered metal is sintered while it is in engagement with the surface area of the part. This results in the accurate formation of a sintered metal chill member which is gas pervious, that is a chill member with spaces through which gas can flow. During a welding operation, an inert gas is conducted through the chill member to the surface area of the part against which the chill member is pressed to retard oxidation of the surface area.
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