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前言过去日本大量采用JIS SB49,SB46,ASTM A515Gr70等钢板来作为锅炉汽包钢板,然而,这次日本三菱公司接受了澳大利亚的订货,要求采用抗拉强度更高的英国标准BS1501-271B 钢。但是,在日本国内还没有制造BS1501-271B 钢的经验,对钢材的可焊性也完全不了解,所以在制造锅炉汽包之前必须进行充分的调查研究。新钢种添加了微量的钒,采用正火+回火处理后能获得高强度、高韧性,但由于含钒量比其它钢种高,所以在制造中为了消
Preface In the past, Japan used JIS SB49, SB46, ASTM A515Gr70, and other heavy-duty steel sheets as boiler drum plates. However, this time Japan’s Mitsubishi Corporation accepted orders from Australia and required the use of British Standard BS1501-271B steel with higher tensile strength. However, there is no experience of manufacturing BS1501-271B steel in Japan and the weldability of the steel is completely unknown. Therefore, sufficient investigation and study must be conducted before the boiler drum is manufactured. The new type of steel added a trace amount of vanadium, using normalizing + tempering can get high strength, high toughness, but because the vanadium content higher than other types of steel, so in the manufacture of consumer