| 摘要 |
1,172,288. Sintered flux composition. KOBE STEEL Ltd. 16 Nov., 1967 [17 Nov., 1966], No. 52123/67. Heading B3R. [Also in Division C7] A sintered flux used for the submerged arc welding of curved workpieces has a bulk S.G. of over 1 gm./c.c.<SP>3</SP> and comprises a metal and non-metal components bonded together by, e.g., water glass, the metal component being Fe powder of minus 20 mesh and forming 25-70% by weight of the flux, the non-metal components being 10-65% by weight MgO powder, CaCo 3 and/or BaCo 3 powders to form 29-76% by weight MgO + CaO + BaO, and SiO 2 and/or AC 2 O 3 powder to form up to 45% by weight of 2 SiO 2 + AC 2 O 3 , based on the composite non- metal components, the remainder consisting of at least one of ZrO 2 , TiO 2 , MnO, Na 2 O, K 2 O and CaF 2 . The Fe powder may be substituted by up to 10% by weight of FeMn, FeSi or FeMo. The CaF 2 may form less than 25% of the flux. Workpieces with curvatures up to 12 degrees may be welded with the flux. |
