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发明公开
CN101008068A 一种管线钢及其成分控制方法 失效 - 权利终止

一种管线钢及其成分控制方法
摘要：
本发明涉及一种管线钢及其成分控制方法，属于X70及以上级别管线钢及其冶炼过程中提高其成分命中率的方法。管线钢成分质量百分比为：C0.03～0.06、Si0.15～0.30、Mn1.52～1.68、P≤0.018、S≤0.003、Nb0.05～0.07、V0.04～0.06、Ti0.007～0.024、Mo0.24～0.29、Ni0.17～0.22、Cu0.17～0.22、Als0.01～0.045、N≤0.008、B≤0.005。其工艺路线为：转炉冶炼—氩站—RH精炼—LF精炼—连铸—下线清理。本发明通过合理目标成分组合，改善合金化处理方式，将成分控制细化到每个工序，从而在提高合金收得率，降低生产成本和耐材消耗的同时，稳定控制钢的成分，使X70及以上级别管线钢各元素成分综合命中率达到100％。
摘要（英）：

The invention relates to a conduit wiring steel and the method for controlling its component, belonging to X70 and conduit wiring steel over this grade and the method for increasing component hit ratio during smelting process. The comprised component and their proportion by weight are as follows: C 0.03- 0.06, Si 0.15-0.30, Mn 1.52-1.68, P<=0.018, S<=0.003, Nb0.05-0.07, V 0.04- 0.06, Ti 0.007-0.024, Mo 0.24-0.29, Ni 0.17-0.22, Cu 0.17-0.22, Als 0.01- 0.045, N<=0.008 and B<=0.005. The process route is as follows: bessemerizing- argon station- RH refining- LF refining- continuous casting- cleaning. The invention combines target component rationally, improves alloying way, controllign component in each process, and stablizes steel component based on reducing production cost and material consumption resistant, and makes comprehensive hit ratio of X70 and conduit wiring steel over this grade reach 100%.

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