| 摘要 |
DISCLOSED IS A COPPER-FREE WIRE FOR GAS-SHIELDED ARC WELDING FEATURING SUPERIOR ARC STABILITY, EXCELLENT DEPOSITION EFFICIENCY AND HIGH MELTING RATE, WHEREIN THE WIRE HAS A FLAT-SHAPED WORKED SURFACE, AND DEPRESSIONS OF A NEGATIVE DIRECTION (TOWARD THE CENTER OF THE WIRE) WITH RESPECT TO THE WORKED SURFACE FORMED IN A CIRCUMFERENTIAL DIRECTION OF THE SURFACE, A RATIO OF AN ACTUAL LENGTH (DR) OF A CIRCULAR ARC TO AN APPARENT LENGTH OF A CIRCULAR ARC (DI) (DR/DI) LIES WITHIN A RANGE OF 1.015 TO 1.515, AND A CHEMICAL COMPOSITION RATIO {CU/(SI+MN+P+S)} X 100 LIES WITHIN A RANGE OF 0.10 TO 0.80. (FIG. 9)
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