热处理工艺对2205-Q345R爆炸复合板性能的影响

摘要

The 2205-Q345R explosive clad plate is widely adopted due to its exceptional performance of both base plates and cladding plates, where stress relief annealing significantly affects the performance of cladding plates 2205 after explosive bonding. By using inter granular corrosion, metallographic, tensile, bending, and other approaches, the corrosion resistance, microstructures, and mechanical properties of 2205-Q345R clad plates are studied, after the plates are prepared with explosive bonding methods and treated with different heat treatment processes. The results show that the corrosion resistance, strength, and bending properties of clad plates under the stress relief annealed at 480~600℃exceed the relevant criteri⁃on and successfully meet the requirements of customers. By comprehensively considering the precipitated phases of cladding plate 2205 as well as the residual stress of clad plates,“540~560℃/1~4 h, furnace cool⁃ing until 300℃, then air cooling”is suggested as the optimum heat treatment.%2205-Q345R爆炸复合板因结合了基复层的优良性能而被广泛应用，爆炸复合后的去应力退火温度对复层2205的性能影响很大。通过对2205-Q345R爆炸复合板在不同热处理工艺下进行退火处理，结合晶间腐蚀、金相、拉伸、弯曲等检测方法，对其耐蚀性、显微组织、力学性能进行研究。结果表明：在480~600℃之间对2205-Q345R爆炸复合板进行去应力退火，复合板的耐蚀性、强度及弯曲性能均满足标准及用户后续的使用要求。综合考虑热处理制度对复层2205析出相的影响及复合板残余应力的消除情况，建议最佳的热处理工艺选择540~560℃，1~4 h炉冷，300℃以下出炉空冷。