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利用被称赞为革命的热机械加工控轧法(TMCP)所制造的称为TMCP型50公斤力/毫米~2级高强度钢作为船体钢开始得到普遍的应用。本文评述了作者的利用TMCP型50公斤力/毫米~2级高强度钢制成的焊接接头所进行的疲劳试验的结果,其内容可概述如下: (1)利用TMCP型50公斤力/毫米~2级高强度钢在大线能量下绘制成的对接焊接头(带加强高)和角焊接头的S-N_f曲线实际上和利用常规轧制型50公斤力/毫米~2级高强度钢绘制成的同样焊接接头的S-N_f曲线没有区别。 (2)同样,利用TMCP型50公斤力/毫米~2高强度钢制成的对接焊接头中大线能量的热影响区所产生的疲劳裂纹扩展在特征上和利用常规轧制型50公斤力/毫米~2级高强度钢制成的中和大线能量的热影响区所产生的疲劳裂纹扩展没有区别。
Known as the Revolutionary Thermo-Mechanical Controlled Rolling (TMCP), the so-called TMCP 50 kg / mm ~ 2 high-strength steels are commonly used as hull steels. This paper reviews the results of the fatigue tests performed by the author on welded joints made of TMCP type 50 kg / mm2 high strength steel. The contents of this article are summarized as follows: (1) Using TMCP 50 kgf / mm ~ S-N_f curves of two-stage high-strength steels which are drawn under large-line energy and are made of butt welded joints (with strengthened heights) and fillet welded joints are actually drawn from the conventional rolling 50 kg / mm 2 high-strength steels There is no difference between the S-N_f curves of the same welded joints. (2) Similarly, the fatigue crack growth generated by the heat affected zone of large-sized energy in the butt-welded joint made of TMCP type 50 kg / mm 2 high strength steel is characterized by a conventional rolling 50 kg There is no difference in the fatigue crack growth caused by the heat affected zone, which is made of high-strength steel in mm / 2 and neutralized by large-sized energy.