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吉林化工学院学报, 2021, 38(1): 27-32     https://doi.org/10.16039/j.cnki.cn22-1249.2021.01.006
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等离子喷焊ZrC增强铁基喷焊层Q345复合板的制备
于宏辰1*,张俊翔2,陈思颖3,宁玉恒4
1长春工程学院, 机电工程学院, 吉林省长春市130021; 2 长春工程学院, 应用技术学院, 吉林省长春市130021; 3 长春工程学院, 水利与环境工程学院, 吉林省长春市130021; 4大唐东北电力试验研究院有限公司, 吉林省长春市130000
Preparation of Q345 Composite Plate with Plasma Spray Welding ZrC Reinforced Iron Base Spray Welding Layer
YU Hongchen1*,ZHANG Junxiang2,CHEN Siying3,NING Yuheng4
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摘要 

对Q345钢板进行等离子喷焊表面处理,通过正交实验优化了Q345表面处理的最佳工艺参数,优化的喷焊工艺为电流60 A、焊枪行走速度20 mm/min、送粉量为35 %、离子气流量为1.2-1.4 L/min、保护气流量为10-12 L/min。结果表明,Q345基板的组织正常,为珠光体+铁素体组织,热影响区处金相组织仍为珠光体+铁素体,喷焊层组织为铁基体及共晶(Cr,Fe)7C3相。其中,喷焊层中的ZrC可以作为铁基体的异质核心,细化了铁基体晶粒尺寸,力学性能得以大幅提高。对最优工艺制备的复合板进行冲击试验测得其冲击韧度为192.8 J/cm2,在冲击过程中高强层的断裂方式为准解理断裂;在基体层位置处断裂方式为解理断裂。

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于宏辰
张俊翔
陈思颖
宁玉恒
关键词:  等离子喷焊  ZrC  Q345     
Abstract: 

The surface treatment of Q345 steel plate was carried out by plasma spray welding. The optimum process parameters of Q345 surface treatment were optimized by orthogonal experiment. The optimized spray welding process was as follows: current 60 A, welding gun walking speed 20 mm / min, powder feeding rate 35%, ion gas flow rate 1.2-1.4 L / min, shielding gas flow rate 10-12 L / min. The results show that the microstructure of Q345 substrate is normal, which is pearlite + ferrite. The microstructure of heat affected zone is still pearlite + ferrite. The microstructure of spray welding layer is iron matrix and eutectic (Cr, Fe)7C3 phase. ZrC in the spray welding layer can be used as the heterogeneous core of iron matrix, which can refine the grain size of iron matrix and improve the mechanical properties greatly. The impact toughness of the composite plate prepared by the optimal process is 192.8 J/cm2. The fracture mode of the high strength layer is quasi cleavage fracture, and the fracture mode of the matrix layer is cleavage fracture.

Key words:  plasma spray welding    ZrC    Q345
               出版日期:  2021-01-15      发布日期:  2021-01-15      整期出版日期:  2021-01-15
TG444  
引用本文:    
于宏辰, 张俊翔, 陈思颖, 宁玉恒. 等离子喷焊ZrC增强铁基喷焊层Q345复合板的制备 [J]. 吉林化工学院学报, 2021, 38(1): 27-32.
YU Hongchen, ZHANG Junxiang, CHEN Siying, NING Yuheng. Preparation of Q345 Composite Plate with Plasma Spray Welding ZrC Reinforced Iron Base Spray Welding Layer . Journal of Jilin Institute of Chemical Technology, 2021, 38(1): 27-32.
链接本文:  
https://xuebao.jlict.edu.cn/CN/10.16039/j.cnki.cn22-1249.2021.01.006  或          https://xuebao.jlict.edu.cn/CN/Y2021/V38/I1/27
[1] 李逸飞, 钟维榕, 邹昌盛, 王浩男, 于宏辰. 等离子喷焊铁/镍混合基喷焊层Q345复合板的制备 [J]. 吉林化工学院学报, 2022, 39(3): 106-113.
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