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发表于 2013-9-20 12:12:00
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应采用AWS A5.4的E347-15或E347-16焊条。Ti不能通过电弧过渡，因此没有含Ti的焊条，只能选含Nb(Cb)+Ta的焊条。
AWS A5.4的A7.32的说明：These electrodes are usually used for welding chromiumnickel alloys of similar compositions stabilized either with niobium or titanium. Electrodes depositing titanium as a stabilizing element are not commercially available because titanium is not readily transferred across the arc in shielded metal arc welding. Although niobium is the stabilizing element usually specified in Type 347 alloys, it should be recognized that tantalum also is present. Tantalum and niobium are almost equally effective in stabilizing carbon and in providing high-temperature strength. This specification recognizes the usual commercial practice of reporting niobium as the sum of niobium plus tantalum. If dilution by the base metal produces a low-ferrite or fully austenitic weld metal deposit, crack sensitivity of the weld may increase substantially.
E347-15类似于国内牌号A137
E347-16类似于国内牌号A132 |
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窥视卡
雷达卡
发表于 2013-9-20 11:07:31
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
发表于 2013-11-22 13:56:08
