| 摘要 |
Spheroidal graphite cast iron body can be welded using a welding alloy whose carbon diffusion rate is sufficiently high that cementite formation is prevented. The alloy has essentially the following composition: less than 0.2% manganese, less than 2.0% carbon, 2.5 to 3.2% silicon, up to 1.0% copper, up to 0.5% molybdenum, up to 2% aluminum, up to 30% nickel, up to 0.1% tungsten, up to 0.1% chromium, up to 0.1% vanadium, magnesium and/or rare earth elements in an amount up to and sufficient to promote the formation of graphite spherolites upon cooling, and balance substantially iron.
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