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针对热轧不锈钢304/Q345R复合板基层和复层的材质特点及其各自对热处理工艺的要求,对热轧不锈钢复合板采用了整体加热至1000℃,冷却时采取高温段(400℃以上)不锈钢层单面喷水快冷+低温段整体空冷的热处理制度。发现经热处理后,基层碳钢的强度增大,塑性达标,韧性得到明显改善,复合板结合性能良好;经草酸电解腐蚀试验发现,热处理后界面附近沟状组织变窄,并出现较宽的阶梯组织,与热处理前复层的沟状组织+混合组织相比,耐晶间腐蚀性能得到明显改善。文章指出高温段不锈钢层单面快冷+低温段整体缓冷的热处理工艺可得到综合性能优良的不锈钢复合板。
According to the material characteristics of hot rolled 304 / Q345R clad laminates and their requirements for heat treatment process, the hot rolled stainless steel clad plate is heated to 1000 ℃ in total and the high temperature (400 ℃) stainless steel Layer single-stage spray + fast cooling low-temperature air-cooled heat treatment system. After heat treatment, the strength of the base carbon steel increases, the plasticity reaches the standard, the toughness is obviously improved, and the bonding performance of the composite plate is good. The electrolysis corrosion test of oxalic acid shows that the groove-shaped structure near the interface becomes narrow after the heat treatment, Tissue, compared with the pre-heat treatment of the groove-like structure + mixed tissue, intergranular corrosion resistance was significantly improved. The article points out that high temperature stainless steel single-stage fast cooling + low-temperature section of the overall slow cooling heat treatment process can be obtained with excellent overall performance stainless steel clad plate.