SPA-H強(qiáng)度偏低分析與研究

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摘 要：對SPA-H工藝過程進(jìn)行跟蹤，結(jié)合金相組織及非金屬夾雜物分析強(qiáng)度不穩(wěn)定的原因。研究分析表明，SPA-H強(qiáng)度偏低主要集中在連鑄開澆和熱換爐次，因保護(hù)澆鑄不當(dāng)，造成板坯成分N含量偏高，有效Ti含量降低，導(dǎo)致鋼種強(qiáng)度偏低。

關(guān)鍵詞：強(qiáng)度；氮；耐候鋼；有效鈦

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

耐海洋性氣候腐蝕鋼板（以下簡稱“耐候鋼”）是制造集裝箱的主要材料，其中熱軋SPA-H鋼板因具有良好的耐蝕性而成為集裝箱制造業(yè)用量最多的鋼種之一[1]。（剩余2921字）