Arc stability with D-C welding generators

Abstract

The reasons leading to the decision to develop this station are given in the paper and the principal features of the equipment selected are described. Particular attention is given to the many auxiliaries. Various changes also were made in the switching equipment and a discussion of these is included.Shortly after the new installation was put in service, the price of fuel oil receded to a low level and oil burners were inserted through the center of the pulverized coal burners. The change from oil to coal or vice versa may be made in a few minutes and without interruption to boiler operation. Operation of the plant is described, including a record of the failure of the new unit. (A.I.E.E. paper No. 33-76) not, however, amount to an actual loss of the essential cathode phenomenon.Criterions for stability are developed in the form of equations and a test for welding generator stability is described. (A.

Mechanism and optimization of oxide fluxes for deep penetration in gas tungsten arc welding

“…One is by changing the raw-material composition by adding some minor elements to the stainless steel, such as O, S, Se, and Bi, [1,2] which is of particular interest to steelmakers who supply the raw materials. [3] Many investigations on the mechanism and the application technology of the ATIG process have been made, and the two representative theories are arc contraction [8][9][10][11][12][13][14][15][16] and reversal of the Marangoni convection in the welding pool. [3][4][5][6] The ATIG process was first invented in the 1960s by researchers at the Paton Electric Welding Institute in Kiev, Ukraine.…”