SPA-H强度偏低分析与研究

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摘 要：对SPA-H工艺过程进行跟踪，结合金相组织及非金属夹杂物分析强度不稳定的原因。研究分析表明，SPA-H强度偏低主要集中在连铸开浇和热换炉次，因保护浇铸不当，造成板坯成分N含量偏高，有效Ti含量降低，导致钢种强度偏低。

关键词：强度；氮；耐候钢；有效钛

ANALYSIS AND RESEARCH ON THE LOW STRENGTH OF SPA-H

Bu He Li Aibin Qu Xiaojian Huang Richeng

（Guangxi Shenglong Metallurgical Co.， Ltd. Fangchenggang 538000，China）

Abstract：This article analyzes the reasons for the instability of SPA-H strength by tracking the process， metallographic structure， and non-metallic inclusions. The research analysis of SPA-H shows that the low strength is mainly due to the continuous casting and heat exchange furnace. Improper protective casting results in a higher N content in the slab composition and a decrease in effective Ti content， leading to a lower strength of the steel grade.

Key words： strength; nitrogen; SPA-H; effective titanium

0 前 言

耐海洋性气候腐蚀钢板（以下简称“耐候钢”）是制造集装箱的主要材料，其中热轧SPA-H钢板因具有良好的耐蚀性而成为集装箱制造业用量最多的钢种之一[1]。（剩余2921字）