2205/Q235B clad steel plates were fabricated using a thermal simulator. The metallographic microscope, scanning electron microscope, energy-dispersive spectrometer, shear test, electrochemical corrosion test and acid immersion test were used to study the influence of the pass reduction ratio on the microstructure and properties of 2205/Q235B clad steel plate. The results show that the clad steel plates had a good bonding surface when the pass reduction ratios were between 16.3% and 36.0%. There existed the mutual diffusion effect of elements near the bonding surface, which caused the long austenite strip on the side of 2205 stainless steel and the decarburization layer on the side of Q235B low-carbon steel. The transformation of δ ferrite to γ austenite and the generation of the decarburization layer were promoted because of the lower pass reduction ratio. The corrosion resistance of 2205 duplex-phases stainless steel worsened by the decrease in δ ferrite content. The increase in the decarburization layer thickness made the shear strength of the clad steel plates reduce from 453 to 390 MPa. The potential of the decarburization layer was lower than that of 2205 stainless steel and Q235B low-carbon steel, which was easily corroded in the corrosive medium.

2205 / Q235B复合钢板是使用热模拟器制造的。利用金相显微镜，扫描电子显微镜，能谱仪，剪切试验，电化学腐蚀试验和酸浸试验研究了通过率的降低对2205 / Q235B复合钢板组织和性能的影响。结果表明，当合格率降低在16.3％和36.0％之间时，复合钢板具有良好的结合表面。在结合面附近存在元素的相互扩散作用，这导致2205不锈钢侧长奥氏体带和Q235B低碳钢侧脱碳层。由于通过率的降低，因此促进了δ铁素体向γ奥氏体的转变以及脱碳层的生成。2205双相不锈钢的耐腐蚀性由于δ铁素体含量的降低而恶化。脱碳层厚度的增加使复合钢板的剪切强度从453 MPa降低到390 MPa。脱碳层的电势低于2205不锈钢和Q235B低碳钢的电势，后者在腐蚀性介质中容易被腐蚀。