Controlled weld area grinding to prevent the initiation of inter

Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool

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228125, B24B 100

Patent

active

042110424

ABSTRACT:
A method is provided for treating the weld area of a welded ferritic stainless steel article to increase the resistance to intergranular corrosion. This method comprises the step of grinding the torch side surface of the welded article at a substantially uniform depth along the length of the weld after the material has solidified in the weld area, with the cross sectional dimension of the grind extending beyond the weld-base metal interface on both sides of the weld area. In accordance with this method, the depth of grind is uniformly controlled within the range of from at least 0.0005 inch as measured at the weld-base metal interface to less than 10% of the unground article thickness.

REFERENCES:
patent: 1954511 (1934-04-01), Adams
patent: 2223648 (1940-12-01), Wachowitz
patent: 2763923 (1956-09-01), Webb
patent: 2794244 (1957-06-01), Vecker
ASTM Designation:A262-268, "Detecting Susceptibility to Intergranular Attack in Stainless Steels," (Nov. 1968).
ASTM Designation:A268-277, "Seamless and Welded Ferritic Stainless Steel Tubing for General Service," (Nov. 1977).

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