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常压液态乙烯储罐用材,过去一直沿用价值昂贵的铝、奥氏体不锈钢、铁素体系5％Ni或9％Ni钢;而对于铁素体系Ni钢一直是采用奥氏体材料施焊,故成本很高,且给施焊和检查带来困难。日本钢管和三菱重工公司为此共同开发了调质型3.5％Ni钢和配套铁素体系焊接材料作为液态乙烯储罐用材,不但提高了储罐的安全可靠性,而且经济效果优越。这一方法已为日本焊接协会和日本高压技术协会所认可。本文重点介绍调质型3.5％Ni钢的性能,配套焊接材料以及焊接接头的性能。
Atmospheric pressure liquid ethylene storage tank material, the past has been the use of expensive aluminum, austenitic stainless steel, ferritic 5% Ni or 9% Ni steel; and for ferritic Ni steel has been austenitic material welding, Therefore, the cost is high, and the welding and inspection to bring difficulties. To this end, Nippon Steel and Mitsubishi Heavy Industries Co., Ltd. jointly developed the quenched and tempered 3.5% Ni steel and ferritic welding consumables as the liquid ethylene tank material, which not only improves the safety and reliability of the tank, but also provides superior economic results. This method has been approved by Japan Welding Society and Japan High Voltage Technology Association. This article focuses on the performance of quenched and tempered 3.5% Ni steel, supporting welding materials and the performance of welded joints.