爆炸-轧制TA1/Q345R复合板的组织与性能

采用爆炸-轧制法制备了TA1/Q345R复合板,并通过拉剪试验对其结合性能进行了测试。借助光学显微镜观察了结合界面附近的显微组织,并利用扫描电镜(配X射线能谱仪)分析了拉剪试样钢侧的断口形貌。结果表明,与爆炸复合板相比,爆炸-轧制复合板的界面结合强度大幅降低,主要原因是结合界面形成了大量脆性中间相,为复合板的断裂失效提供了裂纹源。爆炸-轧制复合板结合界面为平直型界面,界面附近钢侧的微观组织特征有轻微的带状组织、铁素体粗晶区以及多种脆性中间相。剪切应力作用下,爆炸-轧制复合板主要沿轧制形成的原始表面分离,同时含有解理断裂和硬脆相破碎等特征。

Effect of heat treatment on microstucture and properties of explosive welding clad plate of TA1/Q345

The composite plate made by explosion welding technology generally has high residual stress and bed plasticity due to the explosion reinforcement. The heat treatment can play a part of eliminating stress and recovering property.In this study,TA1/Q345 clad plate made by explosive welding was annealed at different temperatures.The microstructure,micro-hardness,and tensile,shear,and bending properties were analyzed after anneal.The result shows that there is fibrous structure in the bonding zone and the plastic deformation is severe,the grain growth and fibrous structure dribbles away with the temperature increasing.Micro-hardness in the interface is bigger than it on the both sides. Tensile and shear strength reduced with the temperature of heat treatment increasing.The propel anneal temperature for TA1/Q345 clad plate is 600

PTA装置TA1/Q345R容器液压试验泄漏的原因分析及对策

针对PTA行业TA1/Q345R容器液压试验过程中出现泄漏的情况,分析了此类设备的制造难点,针对此类容器压力试验时的泄漏问题,从设计、工艺、结构、材料等方面进行了分析,并提出了相应的解决措施和对策。

TA1-Q345复合板变形行为及界面组织演变

采用Gleeble-3500热力模拟试验机对TA1-Q345爆炸复合板进行等温恒应变速率单向热压缩试验,变形参数为:温度573~773 K、应变速率0.001~0.1 s^(-1)、压下量50%。根据流变应力-应变曲线,研究TA1-Q345爆炸复合板的热变形行为和界面组织特征。结果表明:TA1-Q345复合板流变应力对变形温度和应变速率非常敏感,利用修正的J-C模型建立了本构方程,其相关系数R和平均相对误差AARE分别为0.977和3.44%。在应变速率0.01 s^(-1)、变形温度573~773 K、压下量50%时,界面波浪及漩涡变为扁平状,界面两侧组织沿变形方向趋于平行,组织均匀性提高。