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发明公开
CN101250664A 一种具有优异焊接性能的船体结构钢及其生产方法 无效 - 驳回

一种具有优异焊接性能的船体结构钢及其生产方法
摘要：
本发明公开了一种有优异焊接性能的船体结构钢及其生产方法，属于低碳低合金高强钢制造领域，利用本发明可以制造出优异焊接性能的船体结构钢。该钢的化学成分按重量百分比为：C 0.05～0.25％，Si 0.01～1.0％，Mn 0.50～2.0％，P≤0.020％，S≤0.010％，Ti 0.005～0.10％，Nb 0.005～0.10％，余量为Fe及不可避免的杂质，且化学成分满足以下关系式：(1)0.015％≤C×Si≤0.075％；(2)0.095％≤C×Mn≤0.15％；(3)0.0003％≤Nb×Ti≤0.0005％。具体生产方法包括：板坯加热—粗轧—精轧—水冷—空冷。本钢焊接性能、力学性能，不含有Ni、Mo等合金元素，生产过程容易控制，操作简单。
摘要（英）：

The invention discloses a hull structure steel with excellent welding performance and the manufacturing method thereof, which belongs to the manufacturing field of low-carbon low-alloy high strength steel, and hull structure steel with excellent welding performance can be manufactured through utilizing the invention. According to the percentage by weight, the chemical components of the steel comprise C 0.05-0.25%, Si 0.01-1.0%, Mn 0.50-2.0%, P<=0.020%, S<=0.010%, Ti 0.005-0.10%, Nb 0.005-0.10%, and others are Fe and unavoidable impurities, and the chemical components satisfy the following relationship: firstly, 0.015%<=C*Si<=0.075%, secondly, 0.095%<=C*Mn<=0.15%, thirdly, 0.0003%<=Nb*Ti<=0.0005%. The specific manufacturing method comprises the following steps: heating bar plates, roughly rolling, finish rolling, water cooling and air cooling. The steel has high welding performance and mechanical property, and does not contain alloy elements such as Ni, Mo and the like, the manufacturing process is easy to control, and the operation is simple.

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