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一、前言焊接是制造钢筋混凝上结构件的一项重要工艺。Ⅳ级以下的钢筋连接主要采用焊接法,因此,螺纹钢筋焊接后的性能是很重要的性能。轧后余热强化处理的钢筋,强度较热轧态高,表层组织是一种非平衡组织。由此可见,研究这种钢筋焊接后的金相组织与性能更为重要,它将直接影响轧后余热强化处理新工艺的推广应用。另外,在焊接过程中,由于加热温度高
I. Preface Welding is an important process for manufacturing reinforced concrete structures. Grade Ⅳ following the connection of the main use of welding steel, therefore, the performance of welded steel rebar is a very important performance. Hot rolled steel after strengthening treatment, the strength of the higher hot-rolled state, the surface tissue is a non-equilibrium structure. Thus, the study of the microstructure and properties of the steel after welding is more important, it will directly affect the application of new technology after rolling heat treatment. In addition, in the welding process, due to the heating temperature is high