熔融銅-亜鉛-錫合金および熔融硫化物と接触する鋼材の脆化 : 熔融相と接触する鋼材の脆化 II

概要

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Mild steels in contact with molten copper-tin alloys embrittled severely in the range of 0∿80% Sn, but did not embrittle in the range of 90∿100% Sn. As the tin percentage in the alloys was increased and the melting point of the alloys was lowered, the embrittling temperature range was extended down to lower temperature. Mild steel was not embrittled by pure tin, but embrittled by pure zinc and more easily by tin-zinc alloy. Mild steel in contact with the alloys containing 50% zinc and 50% tin respectively was embrittled at a temperature higher than 500℃. The cracks ran along to ferrite-grain boundaries at below A_1 point. Mild steel was embrittled severly by molten copper-zinc alloy that is a brazing solder, but was not embrittled by a tin-lead solder. Some steels in contact with molten iron sulphide were embrittled.
社団法人日本鉄鋼協会の論文
1961-01-01