热处理制度对316L/Q345R爆炸焊复合板组织及性能的影响  

Effect of heat treatment on microstructure and properties of 316L/Q345R explosive welding clad steel plate

作　　者：王斌[1] 徐明[1] 胡静[1] 王良[1] 雷菠菠 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《金属热处理》2017年第1期109-114,共6页Heat Treatment of Metals

摘　　要：运用光学显微镜、扫描电镜和扫描电化学显微镜(SECM)等研究了经过不同热处理后316/Q345R复合板的力学性能、耐晶间腐蚀和点蚀的能力,以及界面处微区耐蚀性规律。结果表明,经过900℃×0.5 h保温处理的试样加工硬化消除,冲击吸收能量(155.77 J)提高,腐蚀速率比值最小(0.29),晶间腐蚀倾向小。界面能谱分析得出,在900℃左右元素由高浓度向低浓度扩散,Cr元素扩散速率较Ni的快。SECM结果显示,靠近界面处的电流都比外侧的电流大,在580℃×3 h、720℃×1.5 h、900℃×0.5 h以及原始爆炸态热处理后的的最大电流分别为890、740、605、865 p A。Mechanical properties and resistance to intergranular corrosion and pitting ability, as well as the micro district corrosion resistance at the binding interface of 316L/Q345R clad plate were investigated through OM, SEM and scanning electrochemical microscopy （SECM）. The resuls show that work hardening of the specimen after 900 ℃ x 0.5 h is eliminated, impact absorbed energy （ 155.77 J） increases, corrosion rate （0.29） is minimum and intergranular corrosion tendency is small. Interfacial energy spectrum analysis shows that about 900 ℃ the elements spread from high concentration to low concentration diffusion, Cr diffusion rate is faster than that of Ni. SECM results show that the current near the interface is larger than the outer side. The maximum current of 580 ℃ × 3 h, 720 ℃ × 1.5 h, 900 ℃ × 0.5 h and original explosive state are 890,740,605 and 865 pA, respectively.

关 键 词：316L/Q345R复合板 热处理 力学性能 扫描电化学显微镜 

分 类 号：TG156[金属学及工艺—热处理]