文章信息/Info

Title:

State of the Art Development of the Manufacturing Technologies of New Generation War Ship Steels

作者:

劉振宇; 陳俊; 唐帥; 王國棟

 東北大學軋制技術及連軋自動化國家重點實驗室，遼寧 沈陽 110004

Author(s):

Liu Zhen-yu;  Chen Jun;  Tang Shuai;  Wang Guo-dong

關鍵詞:

新一代TMCP; 超快冷; 冷卻路徑控制; 鋼材強韌化

DOI:

10.7502/j.issn.1674-3962.2014.09.08

文獻標志碼:

A

摘要:

本文主要綜述了美國艦船用鋼的發展歷程，總結了其成分體系、工藝技術及典型應用，指出了新一代艦船用鋼的發展趨勢。介紹了我國艦船用鋼的主要發展歷程，指出了我國艦船用鋼與國際先進水平的主要差距。本文對于新一代極低碳復合析出強化型高強韌鋼進行了探索性研究。結果發現，采用極低碳成分并結合控制軋制工藝技術，可以獲得強度和韌性的良好匹配。對實驗鋼的顯微組織和析出相進行了檢測分析，對強韌化機制進行了初步的闡述。最后，概述了我國高強韌鋼生產的關鍵技術及裝備基礎。我國自主開發的新一代TMCP工藝技術和裝備已達到國際先進水平，表明我國新一代艦船用鋼由“跟蹤”向“自主研發”轉變已經具備了堅實的裝備和工藝基礎。

Abstract:

In the present paper, the history for the development of war ship steels in the United States, including their composition system, processing routes and typical applications, was summarized. The development trend of new generation war ship steels was pointed out. The history for the development of war ship steels in China was also introduced, and the gap in war ship steels between our country and world powers was analyzed. In addition, prototype steel plate with extremely low carbon content was fabricated at laboratory scale. By applying controlled rolling and heat treatment, the optimized combination of high strength and high toughness has been obtained. The mechanisms of strengthening and toughening for the experimental steel was elucidated by EBSD and TEM, which indicates that precipitation hardening by nano-composite precipitates plays the main role in strengthening this steel. Finally, the key processing routes and equipment developed in China for manufacturing steels with high strength and toughness were outlined. It can be clearly seen that both new generation TMCP technologies and the equipment for on-line cooling and off-line heat treatment developed in China have already reached the international level, which has laid solid foundation for developing new generation war ship steels of our own.