SINTERED FLUX FOR HIGH-EFFICIENCY 309NB SINGLE-LAYER STRIP SURFACING USED IN COOPERATION WITH EQ309LNB WELDING STRIP AND PREPARATION METHOD THEREFOR

摘要

#$%^&*AU2020101820A420201001.pdf#####CN 110405381 A Abstract Page 1/1 The present invention provides an agglomerated flux for high-efficiency 309Nb single-layer strip surfacing used in cooperation with an EQ309LNb welding strip and a preparation method therefor, and relates to an agglomerated flux and a preparation method. The purpose of the present invention is to solve the problem that it is unable to realize cooperation welding with the 309Nb welding strip at a welding speed of 400-500 mm/min to increase the working efficiency. The agglomerated flux comprises the components of the following proportion by weight: 70-80 parts of CaF2, 15-20 parts of A12 03 , 4-10 parts of SiO2 , 2-8 parts of CaO, 1-5 parts of MgO, 1-2 parts of alloying agent and 10-15 parts of binder. The above components are mixed, granulated and sintered in sequence, and thus obtaining the agglomerated flux. When the flux of the present invention is used in cooperation with a 309Nb welding strip for surfacing, the efficiency is increased by 60-100% as compared with the ordinary single-layer strip surfacing and the efficiency is increased by 33-67% as compared with the high-speed strip surfacing. The present invention is applied to the field of surfacing. 1