2205双相不锈钢/Q345低合金钢爆炸复合板的组织与力学性能

Microstructure and Mechanical Properties of Explosive Clad Plates of 2205 Duplex Stainless Steel and Q345 Low Alloy Steel

采用爆炸复合法制备了2205双相不锈钢/Q345低合金钢复合板,借助光学显微镜、能谱仪、力学性能试验机等设备对爆炸复合板结合区的显微组织、元素扩散及力学性能进行了研究。结果表明:爆炸复合板结合界面呈波状,剪切强度高;与基板相比,复合板脆性倾向增加,界面元素扩散层厚度5～20μm;界面附近Q345低合金钢侧组织呈纤维状,其显微硬度升高约41.83%,2205双相不锈钢侧则呈现飞线组织,其显微硬度升高约18.31%。

Explosive clad plates of 2205 duplex stainless steel and Q345 low alloy steel were prepared by explosive composite method. And the microstructure, element diffusion and mechanical properties of explosive clad plates were systematically analyzed by optical microscopy, energy dispersive spectroscopy, mechanical property testing. The results show that a wavelike interface in the explosive clad plate was found with a disfussion layer of 5--20/lm thickness. The brittleness of the prepared explosive clad plate increased as well as the shearing strength. The fibrous microstructure appeared on the interface near the Q345 low alloy steel and the corresponding micro- hardness increases by 41. 83% compared with that of the substrate. However, the flying-lined microstructure displayed on the interface around the 2205 duplex stainless steel with the micro-hardness increasing by 18. 31% in comparison with that of the cover plate.