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利用扫描电子显微技术结合能谱分析对316L/Q345R热轧复合板结合界面组织及元素扩散情况进行了检测,通过热力学计算分析了界面附近碳的分布规律,并测量了结合界面的显微硬度与剪切强度。结果表明,结合界面碳钢一侧存在约50μm的铁素体带,而不锈钢侧存在约100μm的元素扩散影响区;不锈钢中铬、镍等元素向碳钢中扩散,碳钢中碳元素向不锈钢中扩散;复合板界面剪切强度为373 MPa,明显高于标准规定的210 MPa,略低于Q345R与316L剪切强度和的1/2(379 MPa)。
The microstructure and element diffusion of the 316L / Q345R hot-rolled composite plate were examined by scanning electron microscopy and energy spectrum analysis. The distribution of carbon in the vicinity of the interface was analyzed by thermodynamic calculation, and the microhardness With shear strength. The results show that there is about 50μm ferrite band on the bonded carbon steel side and about 100μm diffusion zone on the stainless steel side. Elements such as chromium and nickel in stainless steel diffuse into carbon steel, The interfacial shear strength of the composite plate was 373 MPa, which was significantly higher than the standard 210 MPa and slightly lower than 1/2 (379 MPa) of the shear strength of Q345R and 316L.