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日本川崎钢铁公司水岛厂研制成功重深冲高强度冷轧板新钢种。这是一种用铝脱氧,并明磷和铌微合金化的超低碳钢。钢板有350MPa(A)和380MPa(B)两个强度级别。钢的化学成分如下(%):
Japan’s Kawasaki Steel Mizushima plant successfully developed heavy-duty high-strength cold-rolled sheet of new steel. This is an ultra-low carbon steel that is deoxidized with aluminum and microalloyed with phosphorus and niobium. Steel has 350MPa (A) and 380MPa (B) two strength levels. The chemical composition of steel is as follows (%):