Technical Study of Hot-rolled Steel Strips for Automobile Beam
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摘要: 通过化学成分设计和轧制工艺研究，开发了含铌、含钛的B510L、B550L汽车大梁热轧钢带。钢材的抗拉强度、焊接性能及冷加工性能满足标准要求，钢材的韧性-脆性转变温度低于-40℃。经过变性处理，钢中的非金属夹杂物呈球状弥散分布，较好地解决了钢材力学性能各向异性的问题。Abstract: By designing reasonable chemical compositions and studying rolling technology, Bayi Iron & Steel Company have developed B510L and B550L hot-rolled steel strips for automobile beam bearing titanium and columbium.The tensile strength and weldability and cold deformation capability of rolled steel can meet the requirement of relevant standards and customers.The ductile-brittle transition temperature of rolled steel is less than -40℃.The non-metallic inclusions in steel show the distribution of dispersion of globosity and the question of anisotropy is resolved preferably.
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